SIGHUP completely kills traefik 3.3.3

traeffik · March 2, 2025, 8:02am

Looking at the code:

pkg/provider/file/file.go

07e6491ac


      
          			return errors.New("error using file configuration provider, neither filename nor directory is defined")
          		}
          
          		if err := p.addWatcher(pool, watchItems, configurationChan, p.applyConfiguration); err != nil {
          			return err
          		}
          	}
          
          	pool.GoCtx(func(ctx context.Context) {
          		signals := make(chan os.Signal, 1)
          		signal.Notify(signals, syscall.SIGHUP)
          
          		for {
          			select {
          			case <-ctx.Done():
          				return
          			// signals only receives SIGHUP events.
          			case <-signals:
          				if err := p.applyConfiguration(configurationChan); err != nil {
          					logger.Error().Err(err).Msg("Error while building configuration")
          				}

traefik should re-read configuration when receives signal no 1 (SIGHUP).

But it turns up that sending this signal completely kills traefik - why?

bluepuma77 · March 2, 2025, 10:24am

If you think it’s a bug, report it at Traefik Github.

Make sure to provide more context. Which OS, using containers, etc.

traeffik · March 2, 2025, 10:36am

before i submit a bug - does it work correctly for you?

bluepuma77 · March 3, 2025, 8:58am

This kills traefik:v3.3.3 for me, but also v3.0, v2.11 and v2.9:

docker kill --signal=SIGHUP <container_name_or_id>

So it seems the behavior is the same for over 2 years.

But if I understand the issue and pull correctly, it should reload instead.

traeffik · March 23, 2025, 1:22am

Reported, then: SIGHUP kills the service on 3.x line instead of reloading the configuration · Issue #11624 · traefik/traefik · GitHub

Thanks!

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SIGHUP completely kills traefik 3.3.3

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