KubeStatefulSetUpdateNotRolledOut #

Meaning #

StatefulSet update has not been rolled out.

Service degradation or unavailability.

Check statefulset via kubectl -n $NAMESPACE describe statefulset $NAME.
Check if statefuls update was not paused manually (see status)
Check how many replicas are there declared.
Check the status of the pods which belong to the replica sets under the statefulset.
Check pod template parameters such as:
- pod priority - maybe it was evicted by other more importand pods
- resources - maybe it tries to use unavailabe resource, such as GPU but there is limited number of nodes with GPU
- affinity rules - maybe due to affinities and not enough nodes it is not possible to schedule pods
- pod termination grace period - if too long then pods may be for too long in terminating state
Check if there are issues with attaching disks to statefulset - for example disk was in Zone A, but pod is scheduled in Zone B.
Check if Horizontal Pod Autoscaler (HPA) is not triggered due to untested values (requests values).
Check if cluster-autoscaler is able to create new nodes - see its logs or cluster-autoscaler status configmap.

TODO