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Troubleshooting Statefulset pods stuck into ContainerCreating or Init state

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astra_trident
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virt
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Applies to

  • ONTAP Tools for VMware (OTV) 10.1
  •  iSCSI HA deployment

Issue

  • When node goes down for more than half an hour, and when it comes back up, in the maintenance console, the application status will look similar to below:

Troubleshooting Statefulset pods.png

  • When we list the pods using the following kubectl command, we can observe that the statefulset pods are stuck in a ContainerCreating or Init state for more than 10 minutes.
  • To list the pods, below given command can be utilized and its output would look similar to below:

kubectl -n ntv-system get po -w| grep -e ContainerCreating -e Init -e Pending -e CrashLoopBackOff

ntv-mongodb-1                                      0/2     Init:0/1            0               10m17s

ntv-vault-1                                        0/1     ContainerCreating   0               10m25s

 

  • When we describe any of these stuck pods using the below command, we would observe below warning:

Example:  kubectl describe po ntv-vault-1 -n ntv-system

MountVolume.SetUp failed for volume "pvc-43451cff-8774-47f8-a49e-557b0dc4d4d2" : rpc error: code = Internal desc = unable to mount device; exit status 32 . 

  • The kubelet is trying to mount the PV on the pod and the Kubelet logs displays as seen below:

Example: tail -f /opt/netapp/rancher/rke2/agent/logs/kubelet.log

MountVolume.WaitForAttach entering for volume "pvc-43451cff-8774-47f8-a49e-557b0dc4d4d2"

MountVolume.WaitForAttach succeeded for volume "pvc-43451cff-8774-47f8-a49e-557b0dc4d4d2"

Error: MountVolume.SetUp failed for volume "pvc-43451cff-8774-47f8-a49e-557b0dc4d4d2" (UniqueName: "kubernetes.io/csi/csi.trident.netapp.io^pvc-43451cff-8774-47f8-a49e-557b0dc4d4d2") pod "ntv-mongodb-1" (UID: "b1ae36be-a713-46d9-9dbe-94184be7832f") : rpc error: code = Internal desc = unable to mount device; exit status 32

 

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