140 lines
3.1 KiB
Go
140 lines
3.1 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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"git.g3e.fr/syonad/two/internal/lab/provision"
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"git.g3e.fr/syonad/two/internal/lab/render"
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"git.g3e.fr/syonad/two/internal/lab/topology"
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)
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const usage = `usage: lab <command> [options] <topology.yml> [dir]
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plan <topology.yml>
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validate the topology and print the deterministic plan: addresses, cables, ports
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render -key <public key file> <topology.yml> <dir>
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write, for each node, <dir>/<node>/qemu.args (one argument per line) and the
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cloud-init seed files meta-data, user-data and network-config
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`
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type keyFiles []string
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func (k *keyFiles) String() string { return strings.Join(*k, ",") }
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func (k *keyFiles) Set(v string) error { *k = append(*k, v); return nil }
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func main() {
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os.Exit(run(os.Args[1:], os.Stdout, os.Stderr))
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}
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func run(args []string, stdout, stderr io.Writer) int {
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if len(args) == 0 {
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fmt.Fprint(stderr, usage)
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return 2
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}
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switch args[0] {
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case "plan":
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if len(args) != 2 {
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fmt.Fprint(stderr, usage)
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return 2
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}
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return plan(args[1], stdout, stderr)
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case "render":
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return renderCmd(args[1:], stdout, stderr)
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default:
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fmt.Fprint(stderr, usage)
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return 2
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}
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}
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func load(path string, stderr io.Writer) (*topology.Plan, bool) {
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t, err := topology.Load(path)
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if err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return nil, false
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}
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p, err := topology.Compute(t)
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if err != nil {
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fmt.Fprintf(stderr, "lab: %s:\n%v\n", path, err)
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return nil, false
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}
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return p, true
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}
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func plan(path string, stdout, stderr io.Writer) int {
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p, ok := load(path, stderr)
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if !ok {
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return 1
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}
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if err := p.Write(stdout); err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return 1
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}
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return 0
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}
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func renderCmd(args []string, stdout, stderr io.Writer) int {
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fs := flag.NewFlagSet("render", flag.ContinueOnError)
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fs.SetOutput(stderr)
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fs.Usage = func() { fmt.Fprint(stderr, usage) }
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var keys keyFiles
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fs.Var(&keys, "key", "public key file allowed to log in, repeatable")
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if err := fs.Parse(args); err != nil {
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return 2
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}
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if fs.NArg() != 2 || len(keys) == 0 {
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fmt.Fprint(stderr, usage)
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return 2
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}
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p, ok := load(fs.Arg(0), stderr)
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if !ok {
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return 1
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}
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dir, err := filepath.Abs(fs.Arg(1))
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if err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return 1
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}
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authorized, err := readKeys(keys)
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if err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return 1
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}
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nodes, err := render.Render(p, render.Options{RunDir: dir, AuthorizedKeys: authorized})
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if err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return 1
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}
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for _, n := range nodes {
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if err := provision.WriteFiles(n); err != nil {
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fmt.Fprintf(stderr, "lab: %v\n", err)
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return 1
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}
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fmt.Fprintf(stdout, "%s\n", n.Dir)
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}
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return 0
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}
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func readKeys(files []string) ([]string, error) {
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var keys []string
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for _, f := range files {
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data, err := os.ReadFile(f)
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if err != nil {
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return nil, err
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}
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for _, line := range strings.Split(string(data), "\n") {
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line = strings.TrimSpace(line)
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if line == "" || strings.HasPrefix(line, "#") {
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continue
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}
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keys = append(keys, line)
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}
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}
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return keys, nil
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}
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