zfs-localpv and lvm-localpv controller pod requires restart on single node setup after upgrade to latest version #3751
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Description
Problem Statement:
Setup: Single worker node
Since in the last version of lvm and zfs localpv csi controller was a StatefulSet with Affinity rule below,
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app
operator: In
values:
- openebs-lvm-controller
topologyKey: "kubernetes.io/hostname"
controller manifest was changed to Deployment type in the newer version which causes new controller pods to be not in Running state.
Following are the relevent pod list and events
root@xxx:~/zfs-localpv# kubectl get pod -n openebs
NAME READY STATUS RESTARTS AGE
openebs-zfslocalpv-zfs-localpv-controller-6dd6754489-bnrwh 5/5 Running 0 3m16s
openebs-zfslocalpv-zfs-localpv-controller-78c7bb488d-h44p9 0/5 Pending 0 2m51s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 42s (x2 over 72s) default-scheduler 0/1 nodes are available: 1 node(s) didn't satisfy existing pods anti-affinity rules. preemption: 0/1 nodes are available: 1 node(s) didn't satisfy existing pods anti-affinity rules..
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