7.9. Troubleshooting storage issues

Procedure

• To resolve the multi-attach issue, use one of the following solutions:

  • Enable multiple attachments by using RWX volumes:

    For most storage solutions, you can use ReadWriteMany (RWX) volumes to prevent multi-attach errors.

  • Recover or delete the failed node when using an RWO volume:

    For storage that does not support RWX, such as VMware vSphere, RWO volumes must be used instead. However, RWO volumes cannot be mounted on multiple nodes.

    If you encounter a multi-attach error message with an RWO volume, force delete the pod on a shutdown or crashed node to avoid data loss in critical workloads, such as when dynamic persistent volumes are attached:

    $ oc delete pod <old_pod> --force=true --grace-period=0

    This command deletes the volumes stuck on shutdown or crashed nodes after six minutes.