[Backport 1.28] k8s-dqlite watcher query timeout backport #4651
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Description
Backports watcher query timeout in k8s-dqlite: canonical/k8s-dqlite#161
The PR adds a timeout on long running after queries in k8s-dqlite which are part of the watcher's poll loop.
The timeout is configurable using the
watch-query-timeout
flag.Context
This PR addresses issues raised in microk8s where after the leader node is removed from the cluster the remaining nodes also go into
NotReady
state for ~20 minutes. This timeout helps the responsiveness of the cluster after loosing its leader.