Service atomic-openshift-node reports warning event "hostPath type check failed: /var/log/openvswitch is not a directory" after restart

Solution Verified - Updated -

Environment

  • Red Hat OpenShift Container Platform (OCP) 3.11

Issue

  • After restarting atomic-openshift-node service, a warning node event is reported in openshift-sdn project:

    MountVolume.SetUp failed for volume "log-openvswitch" : hostPath type check failed: /var/log/openvswitch is not a directory

Resolution

  • Log into the node affected and delete the directory /var/log/openvswitch , admin privilege is required.

    # rmdir /var/log/openvswitch

Root Cause

  • The event is not affecting the operational function of the OCP cluster but is permanently reporting the warning event for the ovs pod of the affected node in the openshift-sdn project.
  • The root cause for this flaw was not determined but, after analysis, it was resolved that the node directory /var/log/openvswitch doesn't need to be mounted as a volume on the ovs daemonset pod because, for OpenShift 3.11, the persistent storage is not longer required as per sdn container change.

Diagnostic Steps

  • Verify events in openshift-sdn project

    $ oc get events -n openshift-sdn
LAST SEEN   FIRST SEEN   COUNT     NAME                         KIND      SUBOBJECT   TYPE      REASON        SOURCE                                                        MESSAGE
59s         2m           8         ovs-69tqn.1633691522997a24   Pod                   Warning   FailedMount   kubelet, node-0.testcluster.lab.com   MountVolume.SetUp failed for volume "log-openvswitch" : hostPath type check failed: /var/log/openvswitch is not a directory
1s        1s        1         ovs-69tqn.16336931ba838ca0   Pod                 Warning   FailedMount   kubelet, node-0.testcluster.lab.com   Unable to mount volumes for pod "ovs-69tqn_openshift-sdn(1845e9bc-f093-11ea-806f-fa163e9473f1)": timeout expired waiting for volumes to attach or mount for pod "openshift-sdn"/"ovs-69tqn". list of unmounted volumes=[log-openvswitch]. list of unattached volumes=[host-modules host-run-ovs host-sys host-config-openvswitch log-openvswitch sdn-token-8lqn2]

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