discovery: don't log errors on context cancelation

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

discovery/kubernetes/endpoints.go

@@ -128,7 +128,9 @@ func (e *Endpoints) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	defer e.queue.ShutDown()
 
 	if !cache.WaitForCacheSync(ctx.Done(), e.endpointsInf.HasSynced, e.serviceInf.HasSynced, e.podInf.HasSynced) {
-		level.Error(e.logger).Log("msg", "endpoints informer unable to sync cache")
+		if ctx.Err() != context.Canceled {
+			level.Error(e.logger).Log("msg", "endpoints informer unable to sync cache")
+		}
 		return
 	}
 

discovery/kubernetes/ingress.go

@@ -70,7 +70,9 @@ func (i *Ingress) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	defer i.queue.ShutDown()
 
 	if !cache.WaitForCacheSync(ctx.Done(), i.informer.HasSynced) {
-		level.Error(i.logger).Log("msg", "ingress informer unable to sync cache")
+		if ctx.Err() != context.Canceled {
+			level.Error(i.logger).Log("msg", "ingress informer unable to sync cache")
+		}
 		return
 	}
 

discovery/kubernetes/node.go

@@ -79,7 +79,9 @@ func (n *Node) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	defer n.queue.ShutDown()
 
 	if !cache.WaitForCacheSync(ctx.Done(), n.informer.HasSynced) {
-		level.Error(n.logger).Log("msg", "node informer unable to sync cache")
+		if ctx.Err() != context.Canceled {
+			level.Error(n.logger).Log("msg", "node informer unable to sync cache")
+		}
 		return
 	}
 

discovery/kubernetes/pod.go

@@ -82,7 +82,9 @@ func (p *Pod) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	defer p.queue.ShutDown()
 
 	if !cache.WaitForCacheSync(ctx.Done(), p.informer.HasSynced) {
-		level.Error(p.logger).Log("msg", "pod informer unable to sync cache")
+		if ctx.Err() != context.Canceled {
+			level.Error(p.logger).Log("msg", "pod informer unable to sync cache")
+		}
 		return
 	}
 

discovery/kubernetes/service.go

@@ -75,7 +75,9 @@ func (s *Service) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	defer s.queue.ShutDown()
 
 	if !cache.WaitForCacheSync(ctx.Done(), s.informer.HasSynced) {
-		level.Error(s.logger).Log("msg", "service informer unable to sync cache")
+		if ctx.Err() != context.Canceled {
+			level.Error(s.logger).Log("msg", "service informer unable to sync cache")
+		}
 		return
 	}
 

discovery/refresh/refresh.go

@@ -75,7 +75,9 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 	// Get an initial set right away.
 	tgs, err := d.refresh(ctx)
 	if err != nil {
-		level.Error(d.logger).Log("msg", "Unable to refresh target groups", "err", err.Error())
+		if ctx.Err() != context.Canceled {
+			level.Error(d.logger).Log("msg", "Unable to refresh target groups", "err", err.Error())
+		}
 	} else {
 		select {
 		case ch <- tgs:
@@ -92,7 +94,9 @@ func (d *Discovery) Run(ctx context.Context, ch chan<- []*targetgroup.Group) {
 		case <-ticker.C:
 			tgs, err := d.refresh(ctx)
 			if err != nil {
-				level.Error(d.logger).Log("msg", "Unable to refresh target groups", "err", err.Error())
+				if ctx.Err() != context.Canceled {
+					level.Error(d.logger).Log("msg", "Unable to refresh target groups", "err", err.Error())
+				}
 				continue
 			}