99 lines
2.7 KiB
Go
99 lines
2.7 KiB
Go
package watchdog
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import (
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"errors"
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"fmt"
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"path/filepath"
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"strconv"
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configuration "git.g3e.fr/syonad/two/internal/config/agent"
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"git.g3e.fr/syonad/two/internal/netns"
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"git.g3e.fr/syonad/two/internal/qemu"
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"git.g3e.fr/syonad/two/internal/qmp"
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"git.g3e.fr/syonad/two/internal/state"
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"git.g3e.fr/syonad/two/internal/watchdog/notify"
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"git.g3e.fr/syonad/two/pkg/db/kv"
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"github.com/dgraph-io/badger/v4"
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)
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func tapName(tapID int) string {
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return fmt.Sprintf("tap%d", tapID)
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}
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func CheckVMs(db *badger.DB, cfg *configuration.Config, u unitChecker, n notify.Notifier) error {
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if cfg == nil {
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return errors.New("watchdog: configuration requise pour vérifier les VMs")
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}
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pairs, err := kv.ListByPrefix(db, prefixVM)
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if err != nil {
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return fmt.Errorf("watchdog: lecture des vm: %w", err)
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}
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for _, name := range resourceNames(pairs, prefixVM) {
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st, err := state.Get(db, prefixVM+name)
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if err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("état illisible en base: %v", err))
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continue
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}
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if st != state.Running {
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continue
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}
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checkVM(db, cfg, name, u, n)
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}
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return nil
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}
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func checkVM(db *badger.DB, cfg *configuration.Config, name string, u unitChecker, n notify.Notifier) {
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subnetName, err := kv.GetFromDB(db, prefixVM+name+"/subnet")
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if err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("subnet illisible en base: %v", err))
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return
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}
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vpc, err := kv.GetFromDB(db, prefixSubnet+subnetName+"/vpc")
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if err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("vpc du subnet %s illisible en base: %v", subnetName, err))
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return
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}
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checkVMTap(db, name, vpc, n)
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checkVMQemu(cfg, name, n)
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checkUnit(kindVM, name, "metadata@"+name+".service", u, n)
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checkUnit(kindVM, name, qemu.ScopeName(name), u, n)
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}
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func checkVMTap(db *badger.DB, name, vpc string, n notify.Notifier) {
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raw, err := kv.GetFromDB(db, prefixVM+name+"/tap_id")
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if err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("tap_id illisible en base: %v", err))
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return
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}
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tapID, err := strconv.Atoi(raw)
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if err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("tap_id invalide %q: %v", raw, err))
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return
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}
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if !netns.Exist(vpc) {
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n.Notify(kindVM, name, "netns "+vpc+" absent (/var/run/netns/"+vpc+")")
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return
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}
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if err := netns.Call(vpc, func() error {
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if p := linkProblem(tapName(tapID)); p != "" {
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n.Notify(kindVM, name, p+" (dans le netns "+vpc+")")
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}
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return nil
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}); err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("entrée dans le netns %s impossible: %v", vpc, err))
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}
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}
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func checkVMQemu(cfg *configuration.Config, name string, n notify.Notifier) {
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sock := filepath.Join(cfg.QEMU.QMPDir, name+".sock")
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if _, err := qmp.Send(sock, nil); err != nil {
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n.Notify(kindVM, name, fmt.Sprintf("qemu ne répond pas sur %s: %v", sock, err))
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}
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}
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