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Pod fails to mount PVC using NFS when UserNamespacesSupport is enabled on Kubernetes

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68
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Category:
astra_trident
Specialty:
snapx
Last Updated:

Applies to

  • Astra Trident
  • NFS
  • Kubernetes with enabled UserNamespacesSupport feature gate
  • hostUsers: false in pod specifications 

Issue

  • Pod fails to mount PVC using NFS
  • kubectl describe pod shows warning:

Warning  Failed                  12s (x2 over 15s)  kubelet                  Error: failed to create containerd task: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: failed to fulfil mount request: failed to set MOUNT_ATTR_IDMAP on /var/lib/kubelet/pods/xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx/volumes/kubernetes.io~csi/xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxx/mount: invalid argument (maybe the filesystem used doesn't support idmap mounts on this kernel?): unknown

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