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cmd/containerboot: fix time based serveConfig watcher

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This broke in a last minute refactor and seems to have never worked.

Fixes #9686

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali 2023-10-11 14:24:05 -07:00 committed by Maisem Ali
parent 4abd470322
commit 2d4f808a4c
1 changed files with 7 additions and 6 deletions
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13
cmd/containerboot/main.go
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@ -401,19 +401,20 @@ func watchServeConfigChanges(ctx context.Context, path string, cdChanged <-chan
panic("cd must not be nil")
}
var tickChan <-chan time.Time
w, err := fsnotify.NewWatcher()
if err != nil {
var eventChan <-chan fsnotify.Event
if w, err := fsnotify.NewWatcher(); err != nil {
log.Printf("failed to create fsnotify watcher, timer-only mode: %v", err)
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
tickChan = ticker.C
} else {
defer w.Close()
if err := w.Add(filepath.Dir(path)); err != nil {
log.Fatalf("failed to add fsnotify watch: %v", err)
}
eventChan = w.Events
}
if err := w.Add(filepath.Dir(path)); err != nil {
log.Fatalf("failed to add fsnotify watch: %v", err)
}
var certDomain string
var prevServeConfig *ipn.ServeConfig
for {
@ -423,7 +424,7 @@ func watchServeConfigChanges(ctx context.Context, path string, cdChanged <-chan
case <-cdChanged:
certDomain = *certDomainAtomic.Load()
case <-tickChan:
case <-w.Events:
case <-eventChan:
// We can't do any reasonable filtering on the event because of how
// k8s handles these mounts. So just re-read the file and apply it
// if it's changed.