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Merge pull request #89881 from embano1/etcd-leader-ctx

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Add etcd WithRequireLeader option to API watches
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Kubernetes Prow Robot 2020-04-08 09:09:44 -07:00 committed by GitHub
commit 3c3fc800df
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1 changed files with 9 additions and 1 deletions
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10
staging/src/k8s.io/apiserver/pkg/storage/etcd3/watcher.go
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@ -126,7 +126,15 @@ func (w *watcher) createWatchChan(ctx context.Context, key string, rev int64, re
// The filter doesn't filter out any object.
wc.internalPred = storage.Everything
}
wc.ctx, wc.cancel = context.WithCancel(ctx)
// The etcd server waits until it cannot find a leader for 3 election
// timeouts to cancel existing streams. 3 is currently a hard coded
// constant. The election timeout defaults to 1000ms. If the cluster is
// healthy, when the leader is stopped, the leadership transfer should be
// smooth. (leader transfers its leadership before stopping). If leader is
// hard killed, other servers will take an election timeout to realize
// leader lost and start campaign.
wc.ctx, wc.cancel = context.WithCancel(clientv3.WithRequireLeader(ctx))
return wc
}