Alert rule: CephDeviceFailurePredictionTooHigh

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The device health module has determined that devices predicted to fail can not be remediated automatically, since too many OSDs would be removed from the cluster to ensure performance and availabililty. Prevent data integrity issues by adding new OSDs so that data may be relocated.

Steps for debugging

  1. Check which OSD is failing.

    $ ceph_cluster_ns=syn-rook-ceph-cluster
    # Show life expectancy of the OSD
    $ kubectl -n ${ceph_cluster_ns} exec -it deploy/rook-ceph-tools -- ceph device ls
  2. Increase cluster size.