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Some output tweaks; and some additional transition events upon resume (paused->unknown->{up|down})

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This commit is contained in:
Pim van Pelt
2026-04-11 03:04:47 +02:00
parent 46e78ec36f
commit 56a4a6ba25
4 changed files with 85 additions and 25 deletions
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24
internal/checker/checker.go
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@@ -35,6 +35,7 @@ type worker struct {
hc config.HealthCheck
entry config.Backend
cancel context.CancelFunc
wakeCh chan struct{} // closed/signalled to interrupt probe sleep on resume
}
// Checker orchestrates health probing for all backends.
@@ -236,8 +237,12 @@ func (c *Checker) PauseBackend(name string) (BackendSnapshot, bool) {
}
maxHistory := c.cfg.HealthChecker.TransitionHistory
if w.backend.Pause(maxHistory) {
slog.Info("backend-pause", "backend", name)
c.emitForBackend(name, w.backend.Address, w.backend.Transitions[0], c.cfg.Frontends)
t := w.backend.Transitions[0]
slog.Info("backend-transition", "backend", name,
"from", t.From.String(),
"to", t.To.String(),
)
c.emitForBackend(name, w.backend.Address, t, c.cfg.Frontends)
}
return BackendSnapshot{Health: w.backend, Config: w.entry}, true
}
@@ -252,8 +257,16 @@ func (c *Checker) ResumeBackend(name string) (BackendSnapshot, bool) {
}
maxHistory := c.cfg.HealthChecker.TransitionHistory
if w.backend.Resume(maxHistory) {
slog.Info("backend-resume", "backend", name)
c.emitForBackend(name, w.backend.Address, w.backend.Transitions[0], c.cfg.Frontends)
t := w.backend.Transitions[0]
slog.Info("backend-transition", "backend", name,
"from", t.From.String(),
"to", t.To.String(),
)
c.emitForBackend(name, w.backend.Address, t, c.cfg.Frontends)
select {
case w.wakeCh <- struct{}{}:
default:
}
}
return BackendSnapshot{Health: w.backend, Config: w.entry}, true
}
@@ -274,6 +287,7 @@ func (c *Checker) startWorker(ctx context.Context, name string, entry config.Bac
hc: hc,
entry: entry,
cancel: cancel,
wakeCh: make(chan struct{}, 1),
}
w.backend.Start(maxHistory)
c.workers[name] = w
@@ -310,6 +324,7 @@ func (c *Checker) runProbe(ctx context.Context, name string, pos, total int) {
entry := w.entry
maxHistory := c.cfg.HealthChecker.TransitionHistory
netns := c.cfg.HealthChecker.Netns
wakeCh := w.wakeCh
var sleepFor time.Duration
if entry.HealthCheck == "" {
sleepFor = 30 * time.Second
@@ -322,6 +337,7 @@ func (c *Checker) runProbe(ctx context.Context, name string, pos, total int) {
case <-ctx.Done():
return
case <-time.After(sleepFor):
case <-wakeCh:
}
var result health.ProbeResult