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daemonset: Ignore namespace termination errors when creating pods

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Instead of reporting an event or displaying an error, simply exit
when the namespace is being terminated. This reduces the amount of
controller churn on namespace shutdown. While we could technically
exit the entire processing loop early for very large daemon sets,
we should wait for more evidence that is an issue before changing
that logic substantially.
This commit is contained in:
Clayton Coleman 2019-10-20 16:24:59 -04:00
parent 2e8ace82eb
commit 8f74c8970b
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GPG Key ID: 3D16906B4F1C5CB3
1 changed files with 16 additions and 9 deletions
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25
pkg/controller/daemon/daemon_controller.go
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@ -1053,15 +1053,22 @@ func (dsc *DaemonSetsController) syncNodes(ds *apps.DaemonSet, podsToDelete, nod
ds, metav1.NewControllerRef(ds, controllerKind))
}
if err != nil && errors.IsTimeout(err) {
// Pod is created but its initialization has timed out.
// If the initialization is successful eventually, the
// controller will observe the creation via the informer.
// If the initialization fails, or if the pod keeps
// uninitialized for a long time, the informer will not
// receive any update, and the controller will create a new
// pod when the expectation expires.
return
if err != nil {
if errors.HasStatusCause(err, v1.NamespaceTerminatingCause) {
// If the namespace is being torn down, we can safely ignore
// this error since all subsequent creations will fail.
return
}
if errors.IsTimeout(err) {
// Pod is created but its initialization has timed out.
// If the initialization is successful eventually, the
// controller will observe the creation via the informer.
// If the initialization fails, or if the pod keeps
// uninitialized for a long time, the informer will not
// receive any update, and the controller will create a new
// pod when the expectation expires.
return
}
}
if err != nil {
klog.V(2).Infof("Failed creation, decrementing expectations for set %q/%q", ds.Namespace, ds.Name)