docs: build de 9ab730a738
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0.2.0rc001/exploitation/api-agent/asynchronisme.html
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0.2.0rc001/exploitation/api-agent/asynchronisme.html
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<!DOCTYPE html>
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<html lang="fr" data-content_root="../../" >
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>Modèle asynchrone et codes de retour — Documentation two 0.1.0</title>
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<script data-cfasync="false">
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</script>
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this give us a css class that will be invisible only if js is disabled
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-->
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<noscript>
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<style>
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.pst-js-only { display: none !important; }
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<link href="../../_static/styles/pydata-sphinx-theme.css?digest=8878045cc6db502f8baf" rel="stylesheet" />
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<link rel="stylesheet" type="text/css" href="../../_static/pygments.css?v=8f2a1f02" />
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<script src="../../_static/documentation_options.js?v=4d0cb239"></script>
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<script src="../../_static/translations.js?v=e6b791cb"></script>
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<script src="https://cdn.jsdelivr.net/npm/d3@7.9.0/dist/d3.min.js"></script>
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/* Same as .mermaid-container > pre */
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pre.mermaid > svg {
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/* Same as .mermaid-container > pre > svg */
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.mermaid-container-fullscreen pre.mermaid {
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width: 100%;
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height: 100%;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.mermaid-container-fullscreen .mermaid svg {
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height: 100% !important;
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width: 100% !important;
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cursor: grab;
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}
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position: fixed !important;
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top: 20px !important;
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right: 20px !important;
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width: 40px;
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height: 40px;
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background: rgba(255, 255, 255, 0.95);
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border: 1px solid rgba(0, 0, 0, 0.2);
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border-radius: 50%;
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cursor: pointer;
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z-index: 10000;
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display: flex;
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align-items: center;
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justify-content: center;
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box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
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transition: all 0.2s;
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font-size: 24px;
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line-height: 1;
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color: #333;
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}
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.mermaid-fullscreen-close:hover {
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background: white;
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box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
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transform: scale(1.1);
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}
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background: rgba(50, 50, 50, 0.95);
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border: 1px solid rgba(255, 255, 255, 0.2);
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color: #e0e0e0;
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}
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.mermaid-fullscreen-close.dark-theme:hover {
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background: rgba(60, 60, 60, 1);
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box-shadow: 0 6px 16px rgba(255, 255, 255, 0.2);
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}
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.mermaid-fullscreen-modal .mermaid-fullscreen-btn {
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display: none !important;
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}`;
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document.head.appendChild(fullscreenStyle);
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}
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// Detect if page has dark background
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// We use a set of heuristics:
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// 1. Check for common dark mode classes or attributes
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// 2. Check computed background color brightness
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if (document.documentElement.classList.contains('dark') ||
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document.documentElement.getAttribute('data-theme') === 'dark' ||
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document.body.classList.contains('dark') ||
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document.body.getAttribute('data-theme') === 'dark') {
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// console.log("Dark theme detected via class/attribute");
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return true;
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}
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if (document.documentElement.classList.contains('light') ||
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document.documentElement.getAttribute('data-theme') === 'light' ||
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document.body.classList.contains('light') ||
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document.body.getAttribute('data-theme') === 'light') {
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// console.log("Light theme detected via class/attribute");
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return false;
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}
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if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
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// console.log("Dark theme detected via prefers-color-scheme");
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console.log("Running mermaid diagrams, rerun =", rerun);
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// clear all existing mermaid charts
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el.innerHTML = el.getAttribute('data-original-code');
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// store original code
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// console.log(`Storing original code for re-run: `, el.innerHTML);
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el.setAttribute('data-original-code', el.innerHTML);
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}
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});
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await mermaid.run();
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}
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all_mermaids = document.querySelectorAll(".mermaid");
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const mermaids_processed = document.querySelectorAll(".mermaid[data-processed='true']");
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if ("False" === "True") {
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const mermaids_to_add_zoom = -1 === -1 ? all_mermaids.length : -1;
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if(mermaids_to_add_zoom > 0) {
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var svgs = d3.selectAll("");
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if(all_mermaids.length !== mermaids_processed.length) {
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setTimeout(() => runMermaid(false), 200);
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return;
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} else if(svgs.size() !== mermaids_to_add_zoom) {
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setTimeout(() => runMermaid(false), 200);
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return;
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} else {
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svgs.each(function() {
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var svg = d3.select(this);
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svg.html("<g class='wrapper'>" + svg.html() + "</g>");
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var inner = svg.select("g");
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var zoom = d3.zoom().on("zoom", function(event) {
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inner.attr("transform", event.transform);
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});
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svg.call(zoom);
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});
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}
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}
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} else if(all_mermaids.length !== mermaids_processed.length) {
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// Wait for mermaid to process all diagrams
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setTimeout(() => runMermaid(false), 200);
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return;
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}
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// Stop here if not adding fullscreen capability
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if ("True" !== "True") return;
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if (modal !== null ) {
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// Destroy existing modal
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modal.remove();
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modal = null;
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modalContent = null;
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}
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modal = document.createElement('div');
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modal.className = 'mermaid-fullscreen-modal' + (darkTheme ? ' dark-theme' : '');
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modal.setAttribute('role', 'dialog');
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modal.setAttribute('aria-modal', 'true');
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modal.setAttribute('aria-label', 'Fullscreen diagram viewer');
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modal.innerHTML = `
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<button class="mermaid-fullscreen-close${darkTheme ? ' dark-theme' : ''}" aria-label="Close fullscreen">✕</button>
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<div class="mermaid-container-fullscreen${darkTheme ? ' dark-theme' : ''}"></div>
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`;
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document.body.appendChild(modal);
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modalContent = modal.querySelector('.mermaid-container-fullscreen');
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const closeBtn = modal.querySelector('.mermaid-fullscreen-close');
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const closeModal = () => {
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modal.classList.remove('active');
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modalContent.innerHTML = '';
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document.body.style.overflow = ''
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window.scrollTo({left: previousScrollOffset[0], top: previousScrollOffset[1], behavior: 'instant'});
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};
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closeBtn.addEventListener('click', closeModal);
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modal.addEventListener('click', (e) => {
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if (e.target === modal) closeModal();
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});
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document.addEventListener('keydown', (e) => {
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if (e.key === 'Escape' && modal.classList.contains('active')) {
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closeModal();
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}
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});
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document.querySelectorAll('.mermaid').forEach((mermaidDiv) => {
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if (mermaidDiv.parentNode.classList.contains('mermaid-container') ||
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mermaidDiv.closest('.mermaid-fullscreen-modal')) {
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// Already processed, adjust button class if needed
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const existingBtn = mermaidDiv.parentNode.querySelector('.mermaid-fullscreen-btn');
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if (existingBtn) {
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existingBtn.className = 'mermaid-fullscreen-btn' + (darkTheme ? ' dark-theme' : '');
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}
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return;
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}
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const container = document.createElement('div');
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container.className = 'mermaid-container';
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mermaidDiv.parentNode.insertBefore(container, mermaidDiv);
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container.appendChild(mermaidDiv);
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const fullscreenBtn = document.createElement('button');
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fullscreenBtn.className = 'mermaid-fullscreen-btn' + (darkTheme ? ' dark-theme' : '');
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fullscreenBtn.setAttribute('aria-label', 'View diagram in fullscreen');
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fullscreenBtn.textContent = '⛶';
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fullscreenBtn.style.opacity = '50%';
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// Calculate dynamic position based on diagram's margin and padding
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const diagramStyle = window.getComputedStyle(mermaidDiv);
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const marginTop = parseFloat(diagramStyle.marginTop) || 0;
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const marginRight = parseFloat(diagramStyle.marginRight) || 0;
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const paddingTop = parseFloat(diagramStyle.paddingTop) || 0;
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const paddingRight = parseFloat(diagramStyle.paddingRight) || 0;
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fullscreenBtn.style.top = `${marginTop + paddingTop + 4}px`;
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fullscreenBtn.style.right = `${marginRight + paddingRight + 4}px`;
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fullscreenBtn.addEventListener('click', () => {
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previousScrollOffset = [window.scroll, window.scrollY];
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const clone = mermaidDiv.cloneNode(true);
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modalContent.innerHTML = '';
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modalContent.appendChild(clone);
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const svg = clone.querySelector('svg');
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if (svg) {
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svg.removeAttribute('width');
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svg.removeAttribute('height');
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svg.style.width = '100%';
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svg.style.height = 'auto';
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svg.style.maxWidth = '100%';
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svg.style.sdisplay = 'block';
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if ("False" === "True") {
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setTimeout(() => {
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const g = svg.querySelector('g');
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if (g) {
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var svgD3 = d3.select(svg);
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svgD3.html("<g class='wrapper'>" + svgD3.html() + "</g>");
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var inner = svgD3.select("g");
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var zoom = d3.zoom().on("zoom", function(event) {
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inner.attr("transform", event.transform);
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});
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svgD3.call(zoom);
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}
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}, 100);
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}
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}
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modal.classList.add('active');
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document.body.style.overflow = 'hidden';
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});
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container.appendChild(fullscreenBtn);
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});
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};
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const load = async () => {
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initStyles();
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await runMermaid(true);
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const reRunIfThemeChanges = async () => {
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const newDarkTheme = isDarkTheme();
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if (newDarkTheme !== darkTheme) {
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darkTheme = newDarkTheme;
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console.log("Theme change detected, re-running mermaid with", darkTheme ? "dark" : "default", "theme");
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await mermaid.initialize(
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{...JSON.parse(
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`{"startOnLoad": false}`
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),
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...{ darkMode: darkTheme, theme: darkTheme ? 'dark' : 'default' },
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||||
}
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);
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await runMermaid(true);
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}
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};
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// Update theme classes when theme changes
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const themeObserver = new MutationObserver(reRunIfThemeChanges);
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<h1>Modèle asynchrone et codes de retour</h1>
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<section id="modele-asynchrone-et-codes-de-retour">
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<h1>Modèle asynchrone et codes de retour<a class="headerlink" href="#modele-asynchrone-et-codes-de-retour" title="Lien vers cette rubrique">#</a></h1>
|
||||
<p>Toute création et toute suppression sont <strong>asynchrones</strong>. C’est le point qui surprend le plus
|
||||
souvent à l’intégration : un <code class="docutils literal notranslate"><span class="pre">202</span></code> ne dit pas que la ressource existe, il dit que la demande
|
||||
a été acceptée et enregistrée.</p>
|
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<section id="les-deux-temps-d-une-requete">
|
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<h2>Les deux temps d’une requête<a class="headerlink" href="#les-deux-temps-d-une-requete" title="Lien vers cette rubrique">#</a></h2>
|
||||
<pre class="mermaid">
|
||||
sequenceDiagram
|
||||
participant C as Appelant
|
||||
participant A as API
|
||||
participant W as Worker
|
||||
C->>A: POST /subnets
|
||||
A->>A: Prepare — valide, écrit "creating"
|
||||
A-->>C: 202 + ressource en creating
|
||||
A->>W: Dispatch (file d'attente)
|
||||
W->>W: Execute — netns, netif, dnsmasq
|
||||
W->>W: état → running (ou error)
|
||||
C->>A: GET /subnets/<name>
|
||||
A-->>C: 200 + state
|
||||
</pre><p><strong>Prepare</strong> est synchrone, dans le handler HTTP : il valide l’état, écrit l’état initial en base
|
||||
et répond. <strong>Execute</strong> est asynchrone : il fait le travail réseau réel, puis positionne l’état
|
||||
final.</p>
|
||||
<p>Conséquence directe : un échec d”<code class="docutils literal notranslate"><span class="pre">Execute</span></code> ne peut pas être remonté dans la réponse HTTP. Il
|
||||
se lit dans l’état de la ressource, qui passe à <code class="docutils literal notranslate"><span class="pre">error</span></code>.</p>
|
||||
</section>
|
||||
<section id="attendre-correctement">
|
||||
<h2>Attendre correctement<a class="headerlink" href="#attendre-correctement" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Il n’y a pas de webhook ni de long-polling : l’appelant interroge <code class="docutils literal notranslate"><span class="pre">GET</span> <span class="pre">/<type>/<name></span></code> jusqu’à
|
||||
un état stable.</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="k">until</span><span class="w"> </span><span class="o">[</span><span class="w"> </span><span class="s2">"</span><span class="k">$(</span>curl<span class="w"> </span>-sf<span class="w"> </span>http://127.0.0.1:8080/subnets/sn-000001<span class="w"> </span><span class="p">|</span><span class="w"> </span>jq<span class="w"> </span>-r<span class="w"> </span>.state<span class="k">)</span><span class="s2">"</span><span class="w"> </span><span class="o">=</span><span class="w"> </span>running<span class="w"> </span><span class="o">]</span><span class="p">;</span><span class="w"> </span><span class="k">do</span>
|
||||
<span class="w"> </span>sleep<span class="w"> </span><span class="m">2</span>
|
||||
<span class="k">done</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Trois règles pour un appelant robuste :</p>
|
||||
<ul class="simple">
|
||||
<li><p><strong>Toujours borner l’attente.</strong> Côté agent, <code class="docutils literal notranslate"><span class="pre">dispatcher.timeout_seconds</span></code> (300 s par défaut)
|
||||
borne les opérations qui attendent une transition ; l’appelant doit avoir sa propre borne.</p></li>
|
||||
<li><p><strong>Traiter ``error`` comme terminal, pas comme un échec transitoire.</strong> Un <code class="docutils literal notranslate"><span class="pre">Execute</span></code> en échec
|
||||
ne se rejoue pas tout seul.</p></li>
|
||||
<li><p><strong>Ne pas enchaîner sans vérifier.</strong> Créer un subnet dont le VPC est encore en <code class="docutils literal notranslate"><span class="pre">creating</span></code>
|
||||
échoue en 422 ; démarrer une VM sur un subnet en <code class="docutils literal notranslate"><span class="pre">creating</span></code> ou <code class="docutils literal notranslate"><span class="pre">running</span></code> est en revanche
|
||||
accepté.</p></li>
|
||||
</ul>
|
||||
</section>
|
||||
<section id="codes-de-retour">
|
||||
<h2>Codes de retour<a class="headerlink" href="#codes-de-retour" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="pst-scrollable-table-container"><table class="table">
|
||||
<colgroup>
|
||||
<col style="width: 12.0%" />
|
||||
<col style="width: 88.0%" />
|
||||
</colgroup>
|
||||
<thead>
|
||||
<tr class="row-odd"><th class="head"><p>Code</p></th>
|
||||
<th class="head"><p>Signification</p></th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">202</span></code></p></td>
|
||||
<td><p>demande acceptée et enregistrée ; l’état passera à <code class="docutils literal notranslate"><span class="pre">running</span></code> ou <code class="docutils literal notranslate"><span class="pre">error</span></code></p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">200</span></code></p></td>
|
||||
<td><p>lecture réussie (<code class="docutils literal notranslate"><span class="pre">GET</span></code>)</p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">400</span></code></p></td>
|
||||
<td><p>champ obligatoire manquant, corps invalide, <code class="docutils literal notranslate"><span class="pre">iface_type</span></code> inconnu, base64 invalide</p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">404</span></code></p></td>
|
||||
<td><p>ressource inexistante</p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">409</span></code></p></td>
|
||||
<td><p>conflit d’existence ou d’état : ressource déjà créée, ou suppression depuis un état qui
|
||||
ne l’autorise pas ; pour un VPC, subnets encore présents</p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">422</span></code></p></td>
|
||||
<td><p>dépendance absente ou pas prête : VPC parent d’un subnet, subnet d’une VM</p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">500</span></code></p></td>
|
||||
<td><p>erreur interne</p></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<p>Le corps d’erreur est uniforme : <code class="docutils literal notranslate"><span class="pre">{"error":</span> <span class="pre">"…"}</span></code>.</p>
|
||||
</section>
|
||||
<section id="idempotence">
|
||||
<h2>Idempotence<a class="headerlink" href="#idempotence" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Les créations ne sont <strong>pas</strong> idempotentes : recréer une ressource existante donne 409, pas 202.
|
||||
Un appelant qui rejoue une requête après un timeout réseau doit donc traiter 409 comme
|
||||
« déjà fait », après avoir vérifié l’état par un <code class="docutils literal notranslate"><span class="pre">GET</span></code>.</p>
|
||||
<p>Les suppressions depuis l’état <code class="docutils literal notranslate"><span class="pre">error</span></code> sont acceptées mais <strong>best-effort</strong> : les ressources
|
||||
système peuvent n’avoir été créées que partiellement, et il n’y a pas de rollback — voir
|
||||
<a class="reference internal" href="../../concepts/cycle-de-vie.html"><span class="doc">Cycle de vie des ressources</span></a>.</p>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
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<h1>API de l’agent</h1>
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|
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<p>L’agent expose une API HTTP par hyperviseur. C’est aujourd’hui la seule API de <code class="docutils literal notranslate"><span class="pre">two</span></code> ; les
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API de niveau supérieur viendront avec les composants d’orchestration, et seront documentées
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|
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|
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|
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l’exposer au-delà de la boucle locale.</p>
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two
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<li class="toctree-l1 has-children"><a class="reference internal" href="../deploiement/index.html">Déploiement d’un cluster</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l3"><a class="reference internal" href="api-agent/asynchronisme.html">Modèle asynchrone et codes de retour</a></li>
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<h1>Configuration</h1>
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#base-de-donnees">Base de données</a></li>
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#serveurs">Serveurs</a></li>
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<article class="bd-article">
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<section id="configuration">
|
||||
<h1>Configuration<a class="headerlink" href="#configuration" title="Lien vers cette rubrique">#</a></h1>
|
||||
<p>Un seul fichier, <code class="docutils literal notranslate"><span class="pre">/etc/two/agent.yml</span></code>, partagé par les trois binaires : <code class="docutils literal notranslate"><span class="pre">agent</span> <span class="pre">-config</span></code>,
|
||||
<code class="docutils literal notranslate"><span class="pre">metadata</span> <span class="pre">-conf</span></code> et <code class="docutils literal notranslate"><span class="pre">db</span> <span class="pre">-conf</span></code>. Le fichier de référence commenté est
|
||||
<code class="docutils literal notranslate"><span class="pre">conf/agent/config.exemple.yml</span></code> dans le dépôt.</p>
|
||||
<p>Le chargement se fait par <strong>viper</strong> : les clés sont celles ci-dessous, en YAML.</p>
|
||||
<div class="admonition danger">
|
||||
<p class="admonition-title">Danger</p>
|
||||
<p><strong>L’API de l’agent n’a aucune authentification.</strong> L’exemple livré écoute sur
|
||||
<code class="docutils literal notranslate"><span class="pre">0.0.0.0:8080</span></code> : quiconque atteint ce port peut créer et détruire des VM et des réseaux sur
|
||||
l’host KVM, c’est-à-dire en prendre le contrôle.</p>
|
||||
<p>Sur tout déploiement réel : restreindre <code class="docutils literal notranslate"><span class="pre">api.address</span></code> à une adresse d’administration, ou
|
||||
filtrer le port en amont (pare-feu, réseau dédié). Traiter l’ouverture de ce port comme une
|
||||
décision d’architecture, pas comme un réglage.</p>
|
||||
</div>
|
||||
<section id="base-de-donnees">
|
||||
<h2>Base de données<a class="headerlink" href="#base-de-donnees" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">database</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">path</span><span class="p">:</span><span class="w"> </span><span class="s">"/var/lib/two/data/"</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Répertoire de la base clé-valeur Badger. <strong>Un seul processus l’ouvre</strong> : l’agent. Ni le serveur
|
||||
de metadata ni aucun autre outil ne doit être configuré pour ouvrir le même répertoire pendant
|
||||
que l’agent tourne.</p>
|
||||
</section>
|
||||
<section id="serveurs">
|
||||
<h2>Serveurs<a class="headerlink" href="#serveurs" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">api</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">address</span><span class="p">:</span><span class="w"> </span><span class="s">"0.0.0.0"</span>
|
||||
<span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">8080</span>
|
||||
|
||||
<span class="nt">prometheus</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">address</span><span class="p">:</span><span class="w"> </span><span class="s">"0.0.0.0"</span>
|
||||
<span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">9090</span>
|
||||
|
||||
<span class="nt">admin</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">enabled</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">false</span>
|
||||
<span class="w"> </span><span class="nt">address</span><span class="p">:</span><span class="w"> </span><span class="s">"127.0.0.1"</span>
|
||||
<span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">9091</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">admin</span></code> expose une inspection en lecture seule de la base (<code class="docutils literal notranslate"><span class="pre">/db?prefix=…</span></code>). Elle est
|
||||
désactivée par défaut et prévue pour la boucle locale uniquement.</p>
|
||||
<div class="admonition warning">
|
||||
<p class="admonition-title">Avertissement</p>
|
||||
<p>Le contenu de la base inclut <code class="docutils literal notranslate"><span class="pre">vm/<name>/password</span></code>, qui est un hash de mot de passe.
|
||||
L’activation de l’API d’administration rend ces valeurs lisibles par tout ce qui atteint le
|
||||
port. Ne pas l’exposer hors de la boucle locale.</p>
|
||||
</div>
|
||||
</section>
|
||||
<section id="execution-des-commandes">
|
||||
<h2>Exécution des commandes<a class="headerlink" href="#execution-des-commandes" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">worker</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">count</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">4</span>
|
||||
<span class="w"> </span><span class="nt">buffer_size</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">100</span>
|
||||
|
||||
<span class="nt">dispatcher</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">timeout_seconds</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">300</span>
|
||||
<span class="w"> </span><span class="nt">poll_seconds</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">2</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">worker.count</span></code> est le nombre de goroutines qui exécutent les commandes ; <code class="docutils literal notranslate"><span class="pre">buffer_size</span></code> le
|
||||
nombre de commandes en attente au-delà duquel <code class="docutils literal notranslate"><span class="pre">Dispatch</span></code> bloque.</p>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">dispatcher.timeout_seconds</span></code> borne les opérations qui attendent une transition d’état, dont
|
||||
l’extinction d’une VM.</p>
|
||||
<div class="admonition warning">
|
||||
<p class="admonition-title">Avertissement</p>
|
||||
<p>À l’expiration de ce délai, une VM qui ne s’est pas éteinte reçoit un <code class="docutils literal notranslate"><span class="pre">quit</span></code> QMP — un arrêt
|
||||
<strong>brutal</strong>. Pour des charges dont l’extinction est lente (bases de données, construction
|
||||
d’images), une valeur confortable évite un système de fichiers invité incohérent.</p>
|
||||
</div>
|
||||
</section>
|
||||
<section id="correspondance-des-interfaces">
|
||||
<h2>Correspondance des interfaces<a class="headerlink" href="#correspondance-des-interfaces" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">default_interface</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">br-000000</span>
|
||||
|
||||
<span class="nt">interfaces</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">vms</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">br-000000</span>
|
||||
<span class="w"> </span><span class="nt">internet</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">br-000000</span>
|
||||
<span class="w"> </span><span class="nt">admin</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">br-000000</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Traduit les clés logiques <code class="docutils literal notranslate"><span class="pre">iface_type</span></code> de l’API vers les bridges physiques de l’host. Une clé
|
||||
inconnue ou omise retombe silencieusement sur <code class="docutils literal notranslate"><span class="pre">default_interface</span></code> — ce n’est pas une erreur,
|
||||
mais c’est une source de subnets branchés au mauvais endroit sans le dire.</p>
|
||||
</section>
|
||||
<section id="metadata-et-qemu">
|
||||
<h2>Metadata et QEMU<a class="headerlink" href="#metadata-et-qemu" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">metadata</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">run_dir</span><span class="p">:</span><span class="w"> </span><span class="s">"/run/two/metadata"</span>
|
||||
|
||||
<span class="nt">qemu</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">ovmf_code_path</span><span class="p">:</span><span class="w"> </span><span class="s">"/usr/share/OVMF/OVMF_CODE.fd"</span>
|
||||
<span class="w"> </span><span class="nt">ovmf_vars_template</span><span class="p">:</span><span class="w"> </span><span class="s">"/usr/share/OVMF/OVMF_VARS.fd"</span>
|
||||
<span class="w"> </span><span class="nt">uefi_vars_dir</span><span class="p">:</span><span class="w"> </span><span class="s">"/run/two/vms/efi"</span>
|
||||
<span class="w"> </span><span class="nt">serial_dir</span><span class="p">:</span><span class="w"> </span><span class="s">"/run/two/vms/serial"</span>
|
||||
<span class="w"> </span><span class="nt">monitor_dir</span><span class="p">:</span><span class="w"> </span><span class="s">"/run/two/vms/monitor"</span>
|
||||
<span class="w"> </span><span class="nt">qmp_dir</span><span class="p">:</span><span class="w"> </span><span class="s">"/run/two/vms/qmp"</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Les chemins OVMF sont nécessaires aux VM démarrées avec <code class="docutils literal notranslate"><span class="pre">uefi:</span> <span class="pre">true</span></code> (paquet <code class="docutils literal notranslate"><span class="pre">ovmf</span></code> sur
|
||||
Debian et Ubuntu). <code class="docutils literal notranslate"><span class="pre">uefi_vars_dir</span></code> reçoit une copie inscriptible des variables UEFI par VM,
|
||||
créée au démarrage et supprimée à l’arrêt.</p>
|
||||
</section>
|
||||
<section id="watchdog">
|
||||
<h2>Watchdog<a class="headerlink" href="#watchdog" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">watchdog</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">enabled</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
|
||||
<span class="w"> </span><span class="nt">interval_seconds</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">60</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Vérification périodique <strong>en lecture seule</strong> — voir <a class="reference internal" href="observabilite.html"><span class="doc">Observabilité</span></a>.</p>
|
||||
</section>
|
||||
<section id="journalisation">
|
||||
<h2>Journalisation<a class="headerlink" href="#journalisation" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">logger</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">level</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">info</span><span class="w"> </span><span class="c1"># debug, info, warn, error</span>
|
||||
<span class="w"> </span><span class="nt">debug</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">false</span><span class="w"> </span><span class="c1"># force le niveau debug quel que soit level</span>
|
||||
</pre></div>
|
||||
</div>
|
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572
0.2.0rc001/exploitation/diagnostic.html
Normal file
572
0.2.0rc001/exploitation/diagnostic.html
Normal file
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@ -0,0 +1,572 @@
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two
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<li class="toctree-l2"><a class="reference internal" href="../demarrage/premier-vpc.html">Premier VPC, premier subnet, première VM</a></li>
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</details></li>
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../deploiement/index.html">Déploiement d’un cluster</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l2"><a class="reference internal" href="../deploiement/route-reflector.html">VM route reflector</a></li>
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</ul>
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|
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<p aria-level="2" class="caption" role="heading"><span class="caption-text">Exploitation</span></p>
|
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<ul class="current nav bd-sidenav">
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<li class="toctree-l1 current active has-children"><a class="reference internal" href="index.html">Exploitation</a><details open="open"><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul class="current">
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<li class="toctree-l3"><a class="reference internal" href="api-agent/asynchronisme.html">Modèle asynchrone et codes de retour</a></li>
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<li class="toctree-l3"><a class="reference internal" href="api-agent/reference.html">Référence</a></li>
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|
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|
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|
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<li class="toctree-l2 current active"><a class="current reference internal" href="#">Diagnostic</a></li>
|
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|
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|
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</span>
|
||||
<span class="btn__text-container">.pdf</span>
|
||||
</button>
|
||||
</li>
|
||||
|
||||
</ul>
|
||||
</div>
|
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|
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|
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|
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|
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<button onclick="toggleFullScreen()"
|
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class="btn btn-sm btn-fullscreen-button pst-navbar-icon"
|
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title="Mode plein écran"
|
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data-bs-placement="bottom" data-bs-toggle="tooltip"
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>
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|
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|
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<span class="btn__icon-container">
|
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<i class="fas fa-expand"></i>
|
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</span>
|
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</button>
|
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|
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|
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<button class="btn btn-sm nav-link pst-navbar-icon theme-switch-button pst-js-only" aria-label="Thème" data-bs-title="Thème" data-bs-placement="bottom" data-bs-toggle="tooltip">
|
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<i class="theme-switch fa-solid fa-sun fa-lg" data-mode="light" title="Clair"></i>
|
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<i class="theme-switch fa-solid fa-moon fa-lg" data-mode="dark" title="Sombre"></i>
|
||||
<i class="theme-switch fa-solid fa-circle-half-stroke fa-lg" data-mode="auto" title="Paramètres système"></i>
|
||||
</button>
|
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|
||||
|
||||
<button class="btn btn-sm pst-navbar-icon search-button search-button__button pst-js-only" title="Recherche" aria-label="Recherche" data-bs-placement="bottom" data-bs-toggle="tooltip">
|
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<i class="fa-solid fa-magnifying-glass fa-lg"></i>
|
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<button class="sidebar-toggle secondary-toggle btn btn-sm pst-navbar-icon" title="Toggle secondary sidebar" data-bs-placement="bottom" data-bs-toggle="tooltip">
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<span class="fa-solid fa-list"></span>
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|
||||
|
||||
</div>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
|
||||
|
||||
|
||||
<div id="jb-print-docs-body" class="onlyprint">
|
||||
<h1>Diagnostic</h1>
|
||||
<!-- Table of contents -->
|
||||
<div id="print-main-content">
|
||||
<div id="jb-print-toc">
|
||||
|
||||
<div>
|
||||
<h2> Contenu </h2>
|
||||
</div>
|
||||
<nav aria-label="Page">
|
||||
<ul class="visible nav section-nav flex-column">
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-ressource-part-en-error-juste-apres-le-202">La ressource part en <code class="docutils literal notranslate"><span class="pre">error</span></code> juste après le 202</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-demarre-mais-n-a-pas-d-adresse">La VM démarre mais n’a pas d’adresse</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-a-une-adresse-mais-cloud-init-n-applique-rien">La VM a une adresse mais cloud-init n’applique rien</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#le-user-data-est-servi-vide">Le user-data est servi vide</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-ne-demarre-pas-uefi">La VM ne démarre pas (UEFI)</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#le-delete-renvoie-409">Le <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> renvoie 409</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-base-et-le-systeme-ont-diverge">La base et le système ont divergé</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#l-agent-ne-redemarre-pas-apres-un-arret-brutal">L’agent ne redémarre pas après un arrêt brutal</a></li>
|
||||
</ul>
|
||||
</nav>
|
||||
</div>
|
||||
</div>
|
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</div>
|
||||
|
||||
|
||||
|
||||
<div id="searchbox"></div>
|
||||
<article class="bd-article">
|
||||
|
||||
<section id="diagnostic">
|
||||
<h1>Diagnostic<a class="headerlink" href="#diagnostic" title="Lien vers cette rubrique">#</a></h1>
|
||||
<p>Symptôme, cause probable, vérification. Les causes listées sont celles réellement rencontrées.</p>
|
||||
<section id="la-ressource-part-en-error-juste-apres-le-202">
|
||||
<h2>La ressource part en <code class="docutils literal notranslate"><span class="pre">error</span></code> juste après le 202<a class="headerlink" href="#la-ressource-part-en-error-juste-apres-le-202" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">Execute</span></code> a échoué : la cause est dans le journal de l’agent, pas dans la réponse HTTP.</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>journalctl<span class="w"> </span>-u<span class="w"> </span>agent<span class="w"> </span>-n<span class="w"> </span><span class="m">100</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Cas fréquents :</p>
|
||||
<ul class="simple">
|
||||
<li><p>subnet en mode <code class="docutils literal notranslate"><span class="pre">public_ip</span></code> — la mise en place host n’est pas implémentée, l’échec est attendu ;</p></li>
|
||||
<li><p><code class="docutils literal notranslate"><span class="pre">vxlan_id</span></code> déjà utilisé sur l’host ;</p></li>
|
||||
<li><p>bridge cible absent : <code class="docutils literal notranslate"><span class="pre">iface_type</span></code> inconnu retombé sur <code class="docutils literal notranslate"><span class="pre">default_interface</span></code>, lui-même
|
||||
inexistant.</p></li>
|
||||
</ul>
|
||||
<p>Avant toute recréation, émettre un <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> : il n’y a pas de rollback, les objets système
|
||||
partiellement créés subsistent.</p>
|
||||
</section>
|
||||
<section id="la-vm-demarre-mais-n-a-pas-d-adresse">
|
||||
<h2>La VM démarre mais n’a pas d’adresse<a class="headerlink" href="#la-vm-demarre-mais-n-a-pas-d-adresse" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Le DHCP est servi par l’instance <code class="docutils literal notranslate"><span class="pre">dnsmasq@</span></code> du subnet.</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>systemctl<span class="w"> </span>status<span class="w"> </span><span class="s1">'dnsmasq@<netns>_<bridge>'</span>
|
||||
tail<span class="w"> </span>-50<span class="w"> </span>/var/log/dnsmasq-<netns>_<bridge>.log
|
||||
cat<span class="w"> </span>/run/dnsmasq-<netns>_<bridge>.leases
|
||||
cat<span class="w"> </span>/etc/dnsmasq.d/<netns>_<bridge>.conf
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Si dnsmasq ne voit passer aucune requête, le problème est en amont : tap absent, bridge non
|
||||
raccordé, VM dans le mauvais netns.</p>
|
||||
</section>
|
||||
<section id="la-vm-a-une-adresse-mais-cloud-init-n-applique-rien">
|
||||
<h2>La VM a une adresse mais cloud-init n’applique rien<a class="headerlink" href="#la-vm-a-une-adresse-mais-cloud-init-n-applique-rien" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Deux causes distinctes, à écarter dans cet ordre.</p>
|
||||
<p><strong>1. La VM porte déjà cet ``instance-id``.</strong> <code class="docutils literal notranslate"><span class="pre">instance-id</span></code> vaut le nom de la VM : sur un disque
|
||||
déjà provisionné sous le même nom, cloud-init considère l’instance connue et ne rejoue pas le
|
||||
user-data. Vérification dans le guest :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>cloud-init<span class="w"> </span>query<span class="w"> </span>instance-id
|
||||
ls<span class="w"> </span>/var/lib/cloud/instances/
|
||||
</pre></div>
|
||||
</div>
|
||||
<p><strong>2. Le serveur de metadata est injoignable.</strong> Depuis le guest :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>ip<span class="w"> </span>route
|
||||
curl<span class="w"> </span>-s<span class="w"> </span>http://169.254.169.254/latest/meta-data/
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>La route <code class="docutils literal notranslate"><span class="pre">169.254.169.254/32</span></code> doit être présente, avec l”<code class="docutils literal notranslate"><span class="pre">interface_ip</span></code> du subnet comme
|
||||
next-hop. Si elle est absente ou pointe ailleurs, la DNAT posée en <code class="docutils literal notranslate"><span class="pre">PREROUTING</span></code> dans le netns
|
||||
n’est jamais traversée : la trame est commutée en L2 et le serveur reste injoignable. Voir
|
||||
<a class="reference internal" href="../concepts/modes-reseau.html"><span class="doc">Modes réseau</span></a>.</p>
|
||||
<p>Depuis l’host, l’instance correspondante :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>systemctl<span class="w"> </span>status<span class="w"> </span><span class="s1">'metadata@<vm>'</span>
|
||||
ls<span class="w"> </span>-l<span class="w"> </span>/run/two/metadata/<vm>/
|
||||
</pre></div>
|
||||
</div>
|
||||
</section>
|
||||
<section id="le-user-data-est-servi-vide">
|
||||
<h2>Le user-data est servi vide<a class="headerlink" href="#le-user-data-est-servi-vide" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Un document fourni explicitement vide est servi vide — ce n’est pas la même chose qu’un document
|
||||
absent, qui retombe sur le template. Vérifier le contenu réellement écrit :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>cat<span class="w"> </span>/run/two/metadata/<vm>/user-data
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Un base64 invalide, lui, aurait été rejeté en 400 à la création.</p>
|
||||
</section>
|
||||
<section id="la-vm-ne-demarre-pas-uefi">
|
||||
<h2>La VM ne démarre pas (UEFI)<a class="headerlink" href="#la-vm-ne-demarre-pas-uefi" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">uefi:</span> <span class="pre">true</span></code> exige les fichiers OVMF déclarés dans la configuration :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>ls<span class="w"> </span>-l<span class="w"> </span>/usr/share/OVMF/OVMF_CODE.fd<span class="w"> </span>/usr/share/OVMF/OVMF_VARS.fd
|
||||
ls<span class="w"> </span>-l<span class="w"> </span>/run/two/vms/efi/
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Sur Debian et Ubuntu, le paquet est <code class="docutils literal notranslate"><span class="pre">ovmf</span></code>.</p>
|
||||
</section>
|
||||
<section id="le-delete-renvoie-409">
|
||||
<h2>Le <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> renvoie 409<a class="headerlink" href="#le-delete-renvoie-409" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>La suppression n’est autorisée que depuis <code class="docutils literal notranslate"><span class="pre">running</span></code> ou <code class="docutils literal notranslate"><span class="pre">error</span></code>. Depuis <code class="docutils literal notranslate"><span class="pre">creating</span></code> ou
|
||||
<code class="docutils literal notranslate"><span class="pre">deleting</span></code>, attendre l’état stable. Pour un VPC, tous les subnets doivent être supprimés
|
||||
d’abord.</p>
|
||||
</section>
|
||||
<section id="la-base-et-le-systeme-ont-diverge">
|
||||
<h2>La base et le système ont divergé<a class="headerlink" href="#la-base-et-le-systeme-ont-diverge" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Le watchdog signale une ressource <code class="docutils literal notranslate"><span class="pre">running</span></code> absente du système. Il ne répare rien : la
|
||||
correction est un <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> explicite suivi d’une recréation. Après un redémarrage de l’agent,
|
||||
les ressources restées transitoires sont basculées en <code class="docutils literal notranslate"><span class="pre">error</span></code> par la migration de démarrage —
|
||||
elles n’ont pas forcément échoué, elles ont été interrompues.</p>
|
||||
</section>
|
||||
<section id="l-agent-ne-redemarre-pas-apres-un-arret-brutal">
|
||||
<h2>L’agent ne redémarre pas après un arrêt brutal<a class="headerlink" href="#l-agent-ne-redemarre-pas-apres-un-arret-brutal" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Badger rejoue son journal au démarrage : c’est normal et attendu, notamment si le budget d’arrêt
|
||||
précédent a été dépassé et que la base n’a pas été fermée. Si le démarrage échoue vraiment, le
|
||||
message se trouve dans <code class="docutils literal notranslate"><span class="pre">journalctl</span> <span class="pre">-u</span> <span class="pre">agent</span></code>.</p>
|
||||
<div class="admonition note">
|
||||
<p class="admonition-title">Note</p>
|
||||
<p>Les VM ne sont pas réattachées au redémarrage de l’agent : un processus QEMU survivant à
|
||||
l’agent n’est plus piloté par lui.</p>
|
||||
</div>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
|
||||
</article>
|
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|
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|
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|
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|
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|
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<footer class="prev-next-footer d-print-none">
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<div class="prev-next-area">
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-ressource-part-en-error-juste-apres-le-202">La ressource part en <code class="docutils literal notranslate"><span class="pre">error</span></code> juste après le 202</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-demarre-mais-n-a-pas-d-adresse">La VM démarre mais n’a pas d’adresse</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-a-une-adresse-mais-cloud-init-n-applique-rien">La VM a une adresse mais cloud-init n’applique rien</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#le-user-data-est-servi-vide">Le user-data est servi vide</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-vm-ne-demarre-pas-uefi">La VM ne démarre pas (UEFI)</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#le-delete-renvoie-409">Le <code class="docutils literal notranslate"><span class="pre">DELETE</span></code> renvoie 409</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#la-base-et-le-systeme-ont-diverge">La base et le système ont divergé</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#l-agent-ne-redemarre-pas-apres-un-arret-brutal">L’agent ne redémarre pas après un arrêt brutal</a></li>
|
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</ul>
|
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<p class="component-author">
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Par Nicolas Boufidjeline
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© Copyright 2026, Nicolas Boufidjeline.
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<!-- Scripts loaded after <body> so the DOM is not blocked -->
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<script defer src="../_static/scripts/bootstrap.js?digest=8878045cc6db502f8baf"></script>
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446
0.2.0rc001/exploitation/index.html
Normal file
446
0.2.0rc001/exploitation/index.html
Normal file
|
|
@ -0,0 +1,446 @@
|
|||
|
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<!DOCTYPE html>
|
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|
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|
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<html lang="fr" data-content_root="../" >
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>Exploitation — Documentation two 0.1.0</title>
|
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|
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|
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|
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<script data-cfasync="false">
|
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document.documentElement.dataset.mode = localStorage.getItem("mode") || "";
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document.documentElement.dataset.theme = localStorage.getItem("theme") || "";
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</script>
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<!--
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this give us a css class that will be invisible only if js is disabled
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-->
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<noscript>
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<style>
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.pst-js-only { display: none !important; }
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</noscript>
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<link href="../_static/styles/theme.css?digest=8878045cc6db502f8baf" rel="stylesheet" />
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<link href="../_static/styles/pydata-sphinx-theme.css?digest=8878045cc6db502f8baf" rel="stylesheet" />
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<h1>Observabilité</h1>
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<section id="observabilite">
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<h1>Observabilité<a class="headerlink" href="#observabilite" title="Lien vers cette rubrique">#</a></h1>
|
||||
<section id="metriques-prometheus">
|
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<h2>Métriques Prometheus<a class="headerlink" href="#metriques-prometheus" title="Lien vers cette rubrique">#</a></h2>
|
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<p>Exposées sur le port <code class="docutils literal notranslate"><span class="pre">prometheus.port</span></code> (9090 par défaut), alimentées par l’état lu en base :</p>
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<div class="pst-scrollable-table-container"><table class="table">
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<colgroup>
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<col style="width: 40.0%" />
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<col style="width: 60.0%" />
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<th class="head"><p>Description</p></th>
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|
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|
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<tbody>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">syonad_vpcs_total</span></code></p></td>
|
||||
<td><p>nombre de VPC, par état</p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">syonad_subnets_total</span></code></p></td>
|
||||
<td><p>nombre de subnets, par état</p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">syonad_vms_total</span></code></p></td>
|
||||
<td><p>nombre de VM, par état</p></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
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<p>Les états sont ceux du <a class="reference internal" href="../concepts/cycle-de-vie.html"><span class="doc">cycle de vie</span></a>. Une valeur non nulle et
|
||||
durable sur <code class="docutils literal notranslate"><span class="pre">error</span></code> est l’alerte la plus utile à poser ; une valeur durable sur <code class="docutils literal notranslate"><span class="pre">creating</span></code>
|
||||
ou <code class="docutils literal notranslate"><span class="pre">deleting</span></code> signale une opération qui n’aboutit pas.</p>
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</section>
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||||
<section id="watchdog">
|
||||
<h2>Watchdog<a class="headerlink" href="#watchdog" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Une goroutine périodique vérifie que les ressources marquées <code class="docutils literal notranslate"><span class="pre">running</span></code> en base existent
|
||||
toujours sur le système, et <strong>notifie les écarts sans jamais réparer</strong>.</p>
|
||||
<div class="highlight-yaml notranslate"><div class="highlight"><pre><span></span><span class="nt">watchdog</span><span class="p">:</span>
|
||||
<span class="w"> </span><span class="nt">enabled</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
|
||||
<span class="w"> </span><span class="nt">interval_seconds</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">60</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Il contrôle notamment l’existence des network namespaces, des liens réseau des subnets, des taps
|
||||
de VM et la réponse des units systemd associées.</p>
|
||||
<div class="admonition note">
|
||||
<p class="admonition-title">Note</p>
|
||||
<p>Un écart persistant est signalé <strong>à chaque tick</strong>, sans déduplication. Le volume de
|
||||
notifications est donc proportionnel à la durée de l’anomalie : c’est voulu, mais cela veut
|
||||
dire qu’une alerte doit agréger, pas compter.</p>
|
||||
</div>
|
||||
<p>Le watchdog étant strictement en lecture seule, une divergence entre la base et le système
|
||||
subsiste jusqu’à une action explicite (<code class="docutils literal notranslate"><span class="pre">DELETE</span></code> puis recréation).</p>
|
||||
</section>
|
||||
<section id="journaux">
|
||||
<h2>Journaux<a class="headerlink" href="#journaux" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">slog</span></code> structuré, niveau réglé par <code class="docutils literal notranslate"><span class="pre">logger.level</span></code> (<code class="docutils literal notranslate"><span class="pre">debug</span></code>, <code class="docutils literal notranslate"><span class="pre">info</span></code>, <code class="docutils literal notranslate"><span class="pre">warn</span></code>, <code class="docutils literal notranslate"><span class="pre">error</span></code>),
|
||||
<code class="docutils literal notranslate"><span class="pre">logger.debug:</span> <span class="pre">true</span></code> forçant <code class="docutils literal notranslate"><span class="pre">debug</span></code>.</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>journalctl<span class="w"> </span>-u<span class="w"> </span>agent<span class="w"> </span>-f
|
||||
journalctl<span class="w"> </span>-u<span class="w"> </span><span class="s1">'metadata@i-web'</span><span class="w"> </span>-n<span class="w"> </span><span class="m">50</span>
|
||||
tail<span class="w"> </span>-f<span class="w"> </span>/var/log/dnsmasq-vp-admin_br-sn000001.log
|
||||
</pre></div>
|
||||
</div>
|
||||
</section>
|
||||
<section id="inspection-de-la-base">
|
||||
<h2>Inspection de la base<a class="headerlink" href="#inspection-de-la-base" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>En ligne de commande, sur l’host :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>/opt/two/bin/db<span class="w"> </span>-conf<span class="w"> </span>/etc/two/agent.yml
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="admonition warning">
|
||||
<p class="admonition-title">Avertissement</p>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">db</span></code> ouvre directement la base Badger. <strong>Ne pas l’utiliser pendant que l’agent tourne</strong> :
|
||||
deux processus ne doivent pas ouvrir la même instance.</p>
|
||||
</div>
|
||||
<p>L’API d’administration donne la même lecture sans ce risque, quand elle est activée :</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>curl<span class="w"> </span>-s<span class="w"> </span><span class="s1">'http://127.0.0.1:9091/db?prefix=vm/'</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<p>Elle expose l’intégralité des valeurs, <strong>y compris les hashs de mot de passe</strong> — cf.
|
||||
<a class="reference internal" href="configuration.html"><span class="doc">Configuration</span></a>.</p>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
|
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</article>
|
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|
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|
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|
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<p class="prev-next-subtitle">suivant</p>
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<i class="fa-solid fa-list"></i> Contenu
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<ul class="visible nav section-nav flex-column">
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#metriques-prometheus">Métriques Prometheus</a></li>
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#watchdog">Watchdog</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#journaux">Journaux</a></li>
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<p class="component-author">
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Par Nicolas Boufidjeline
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568
0.2.0rc001/exploitation/services.html
Normal file
568
0.2.0rc001/exploitation/services.html
Normal file
|
|
@ -0,0 +1,568 @@
|
|||
|
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<!DOCTYPE html>
|
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|
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|
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<html lang="fr" data-content_root="../" >
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
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<title>Services systemd — Documentation two 0.1.0</title>
|
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|
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|
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|
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<script data-cfasync="false">
|
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document.documentElement.dataset.mode = localStorage.getItem("mode") || "";
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document.documentElement.dataset.theme = localStorage.getItem("theme") || "";
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</script>
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<!--
|
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this give us a css class that will be invisible only if js is disabled
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-->
|
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<noscript>
|
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<style>
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.pst-js-only { display: none !important; }
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</noscript>
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<link rel="preload" as="script" href="../_static/scripts/bootstrap.js?digest=8878045cc6db502f8baf" />
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<script src="../_static/translations.js?v=e6b791cb"></script>
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<script>DOCUMENTATION_OPTIONS.pagename = 'exploitation/services';</script>
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<link rel="index" title="Index" href="../genindex.html" />
|
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<link rel="search" title="Recherche" href="../search.html" />
|
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<link rel="next" title="API de l’agent" href="api-agent/index.html" />
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<link rel="prev" title="Configuration" href="configuration.html" />
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<meta name="viewport" content="width=device-width, initial-scale=1"/>
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<meta name="docsearch:language" content="fr"/>
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<meta name="docsearch:version" content="0.1" />
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</head>
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<body data-bs-spy="scroll" data-bs-target=".bd-toc-nav" data-offset="180" data-bs-root-margin="0px 0px -60%" data-default-mode="">
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<div id="pst-skip-link" class="skip-link d-print-none"><a href="#main-content">Passer au contenu principal</a></div>
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<button type="button" class="btn rounded-pill" id="pst-back-to-top">
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<i class="fa-solid fa-arrow-up"></i>Haut de page</button>
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<span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd>K</kbd></span>
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<div class="pst-async-banner-revealer d-none">
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<aside id="bd-header-version-warning" class="d-none d-print-none" aria-label="Alerte de version"></aside>
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<header class="bd-header navbar navbar-expand-lg bd-navbar d-print-none">
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<div class="sidebar-primary-items__start sidebar-primary__section">
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<p class="title logo__title">Documentation two 0.1.0</p>
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<span class="search-button__default-text">Recherche</span>
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<span class="search-button__kbd-shortcut"><kbd class="kbd-shortcut__modifier">Ctrl</kbd>+<kbd class="kbd-shortcut__modifier">K</kbd></span>
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<div class="sidebar-primary-item"><nav class="bd-links bd-docs-nav" aria-label="Main">
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|
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two
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</a>
|
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</li>
|
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</ul>
|
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<p aria-level="2" class="caption" role="heading"><span class="caption-text">Mise en œuvre</span></p>
|
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<ul class="nav bd-sidenav">
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../demarrage/index.html">Démarrage</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
|
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<li class="toctree-l2"><a class="reference internal" href="../demarrage/installation.html">Installation d’un hyperviseur</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../demarrage/premier-vpc.html">Premier VPC, premier subnet, première VM</a></li>
|
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</ul>
|
||||
</details></li>
|
||||
<li class="toctree-l1 has-children"><a class="reference internal" href="../deploiement/index.html">Déploiement d’un cluster</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../deploiement/architecture-cluster.html">Architecture du cluster</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../deploiement/image-qcow2.html">Construction de l’image qcow2</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../deploiement/routeurs.html">Routeurs</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../deploiement/premier-hyperviseur.html">Premier hyperviseur</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../deploiement/route-reflector.html">VM route reflector</a></li>
|
||||
</ul>
|
||||
</details></li>
|
||||
</ul>
|
||||
<p aria-level="2" class="caption" role="heading"><span class="caption-text">Exploitation</span></p>
|
||||
<ul class="current nav bd-sidenav">
|
||||
<li class="toctree-l1 current active has-children"><a class="reference internal" href="index.html">Exploitation</a><details open="open"><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul class="current">
|
||||
<li class="toctree-l2"><a class="reference internal" href="configuration.html">Configuration</a></li>
|
||||
<li class="toctree-l2 current active"><a class="current reference internal" href="#">Services systemd</a></li>
|
||||
<li class="toctree-l2 has-children"><a class="reference internal" href="api-agent/index.html">API de l’agent</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
|
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<li class="toctree-l3"><a class="reference internal" href="api-agent/asynchronisme.html">Modèle asynchrone et codes de retour</a></li>
|
||||
<li class="toctree-l3"><a class="reference internal" href="api-agent/reference.html">Référence</a></li>
|
||||
</ul>
|
||||
</details></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="observabilite.html">Observabilité</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="diagnostic.html">Diagnostic</a></li>
|
||||
</ul>
|
||||
</details></li>
|
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</ul>
|
||||
<p aria-level="2" class="caption" role="heading"><span class="caption-text">Interne</span></p>
|
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<ul class="nav bd-sidenav">
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../concepts/index.html">Concepts</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
|
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<li class="toctree-l2"><a class="reference internal" href="../concepts/vpc-subnet-vm.html">VPC, subnet et VM</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../concepts/modes-reseau.html">Modes réseau</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../concepts/cycle-de-vie.html">Cycle de vie des ressources</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../concepts/metadata-cloud-init.html">Metadata et cloud-init</a></li>
|
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</ul>
|
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</details></li>
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../architecture/index.html">Architecture</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
|
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<li class="toctree-l2"><a class="reference internal" href="../architecture/vue-densemble.html">Vue d’ensemble</a></li>
|
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<li class="toctree-l2"><a class="reference internal" href="../architecture/stockage.html">Schéma des clés</a></li>
|
||||
<li class="toctree-l2"><a class="reference internal" href="../architecture/contraintes.html">Invariants et pièges</a></li>
|
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</ul>
|
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</details></li>
|
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<li class="toctree-l1 has-children"><a class="reference internal" href="../versions/index.html">Versions</a><details><summary><span class="toctree-toggle" role="presentation"><i class="fa-solid fa-chevron-down"></i></span></summary><ul>
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<li class="toctree-l2"><a class="reference internal" href="../versions/0.1.0.html">Michael</a></li>
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</div>
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<div id="jb-print-docs-body" class="onlyprint">
|
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<h1>Services systemd</h1>
|
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<!-- Table of contents -->
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<div id="print-main-content">
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<div id="jb-print-toc">
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<div>
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<h2> Contenu </h2>
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</div>
|
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<nav aria-label="Page">
|
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<ul class="visible nav section-nav flex-column">
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#dnsmasq">dnsmasq</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#qemu-n-est-pas-une-unit">QEMU n’est pas une unit</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sockets-par-vm">Sockets par VM</a></li>
|
||||
<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#arret-de-l-agent">Arrêt de l’agent</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#mise-a-jour">Mise à jour</a></li>
|
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</ul>
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</nav>
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</div>
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</div>
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<div id="searchbox"></div>
|
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<article class="bd-article">
|
||||
|
||||
<section id="services-systemd">
|
||||
<h1>Services systemd<a class="headerlink" href="#services-systemd" title="Lien vers cette rubrique">#</a></h1>
|
||||
<p>Trois units, installées sous <code class="docutils literal notranslate"><span class="pre">/opt/two/bin</span></code> par <code class="docutils literal notranslate"><span class="pre">deploy.sh</span></code>.</p>
|
||||
<div class="pst-scrollable-table-container"><table class="table">
|
||||
<colgroup>
|
||||
<col style="width: 28.0%" />
|
||||
<col style="width: 32.0%" />
|
||||
<col style="width: 40.0%" />
|
||||
</colgroup>
|
||||
<thead>
|
||||
<tr class="row-odd"><th class="head"><p>Unit</p></th>
|
||||
<th class="head"><p>Instance <code class="docutils literal notranslate"><span class="pre">%i</span></code></p></th>
|
||||
<th class="head"><p>Rôle</p></th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">agent.service</span></code></p></td>
|
||||
<td><p>—</p></td>
|
||||
<td><p>processus principal : API, dispatcher, exécution, watchdog</p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p><code class="docutils literal notranslate"><span class="pre">dnsmasq@.service</span></code></p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre"><netns>_<bridge></span></code></p></td>
|
||||
<td><p>dnsmasq lancé dans le netns du VPC, un par subnet</p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p><code class="docutils literal notranslate"><span class="pre">metadata@.service</span></code></p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre"><nom</span> <span class="pre">de</span> <span class="pre">la</span> <span class="pre">VM></span></code></p></td>
|
||||
<td><p>serveur de metadata cloud-init, un par VM</p></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<p>Les instances sont créées et pilotées par l’agent au fil des créations de subnets et de VM : il
|
||||
n’y a pas à les démarrer à la main en fonctionnement normal.</p>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>systemctl<span class="w"> </span>status<span class="w"> </span>agent
|
||||
systemctl<span class="w"> </span>status<span class="w"> </span><span class="s1">'dnsmasq@vp-admin_br-sn000001'</span>
|
||||
systemctl<span class="w"> </span>status<span class="w"> </span><span class="s1">'metadata@i-web'</span>
|
||||
</pre></div>
|
||||
</div>
|
||||
<section id="dnsmasq">
|
||||
<h2>dnsmasq<a class="headerlink" href="#dnsmasq" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Le script <code class="docutils literal notranslate"><span class="pre">run-dnsmasq-in-netns.sh</span></code> entre dans le netns puis exécute dnsmasq avec un fichier
|
||||
de configuration par subnet, généré par l’agent :</p>
|
||||
<div class="pst-scrollable-table-container"><table class="table">
|
||||
<colgroup>
|
||||
<col style="width: 40.0%" />
|
||||
<col style="width: 60.0%" />
|
||||
</colgroup>
|
||||
<tbody>
|
||||
<tr class="row-odd"><td><p>Configuration</p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre">/etc/dnsmasq.d/<netns>_<bridge>.conf</span></code></p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p>Baux</p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre">/run/dnsmasq-<netns>_<bridge>.leases</span></code></p></td>
|
||||
</tr>
|
||||
<tr class="row-odd"><td><p>Journal</p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre">/var/log/dnsmasq-<netns>_<bridge>.log</span></code></p></td>
|
||||
</tr>
|
||||
<tr class="row-even"><td><p>PID</p></td>
|
||||
<td><p><code class="docutils literal notranslate"><span class="pre">/run/dnsmasq-<netns>_<bridge>.pid</span></code></p></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<p>Le fichier de baux et le journal sont les deux premiers endroits à regarder quand une VM n’obtient
|
||||
pas d’adresse.</p>
|
||||
</section>
|
||||
<section id="qemu-n-est-pas-une-unit">
|
||||
<h2>QEMU n’est pas une unit<a class="headerlink" href="#qemu-n-est-pas-une-unit" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>Les processus QEMU sont lancés par <code class="docutils literal notranslate"><span class="pre">systemd-run</span> <span class="pre">--scope</span></code>, <strong>jamais</strong> en unit transitoire. Un
|
||||
scope est exécuté par le processus appelant et hérite donc du network namespace posé par
|
||||
l’agent ; une unit transitoire, forkée par PID 1, démarrerait dans le netns racine et ne verrait
|
||||
pas le tap de la VM.</p>
|
||||
<p>Conséquence pratique : les VM n’apparaissent pas dans <code class="docutils literal notranslate"><span class="pre">systemctl</span> <span class="pre">list-units</span></code> mais dans
|
||||
<code class="docutils literal notranslate"><span class="pre">systemd-cgls</span></code>, et elles ne survivent pas à un <code class="docutils literal notranslate"><span class="pre">systemctl</span> <span class="pre">stop</span> <span class="pre">agent</span></code> suivi d’un
|
||||
redémarrage — l’agent ne réattache pas les VM existantes.</p>
|
||||
</section>
|
||||
<section id="sockets-par-vm">
|
||||
<h2>Sockets par VM<a class="headerlink" href="#sockets-par-vm" title="Lien vers cette rubrique">#</a></h2>
|
||||
<div class="highlight-text notranslate"><div class="highlight"><pre><span></span>/run/two/vms/serial/<vm>.sock console série
|
||||
/run/two/vms/monitor/<vm>.sock monitor QEMU
|
||||
/run/two/vms/qmp/<vm>.sock QMP (utilisé par l'agent)
|
||||
</pre></div>
|
||||
</div>
|
||||
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>socat<span class="w"> </span>-,raw,echo<span class="o">=</span><span class="m">0</span><span class="w"> </span>UNIX-CONNECT:/run/two/vms/serial/i-web.sock
|
||||
</pre></div>
|
||||
</div>
|
||||
</section>
|
||||
<section id="arret-de-l-agent">
|
||||
<h2>Arrêt de l’agent<a class="headerlink" href="#arret-de-l-agent" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p>L’ordre d’arrêt est imposé : serveurs HTTP, puis drainage des workers, puis fermeture de la base.
|
||||
Si le budget d’arrêt est dépassé, la base <strong>n’est pas fermée</strong> — fermer Badger sous un écrivain
|
||||
concurrent est pire qu’un rejeu du journal au démarrage suivant. Un message à ce sujet dans le
|
||||
journal au moment d’un <code class="docutils literal notranslate"><span class="pre">stop</span></code> n’est donc pas une anomalie.</p>
|
||||
</section>
|
||||
<section id="mise-a-jour">
|
||||
<h2>Mise à jour<a class="headerlink" href="#mise-a-jour" title="Lien vers cette rubrique">#</a></h2>
|
||||
<p><code class="docutils literal notranslate"><span class="pre">deploy.sh</span></code> relève les instances <code class="docutils literal notranslate"><span class="pre">dnsmasq@</span></code> et <code class="docutils literal notranslate"><span class="pre">metadata@</span></code> actives <strong>avant</strong> d’arrêter les
|
||||
services, et les redémarre ensuite : c’est la seule façon de savoir lesquelles relancer. Arrêter
|
||||
les services à la main avant de lancer le script fait perdre cette liste.</p>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
|
||||
</article>
|
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|
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|
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|
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|
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|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#dnsmasq">dnsmasq</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#qemu-n-est-pas-une-unit">QEMU n’est pas une unit</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#sockets-par-vm">Sockets par VM</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#arret-de-l-agent">Arrêt de l’agent</a></li>
|
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<li class="toc-h2 nav-item toc-entry"><a class="reference internal nav-link" href="#mise-a-jour">Mise à jour</a></li>
|
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<p class="component-author">
|
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Par Nicolas Boufidjeline
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|
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© Copyright 2026, Nicolas Boufidjeline.
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