Block Storage Host Reports "Unable to locate Target IQN"

Problem

A Block Storage (Cinder) host is logging the following (in /var/log/messages ) related to being unable to locate a target IQN.

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Environment

  • Platform9 Managed OpenStack - All Versions
  • Block Storage (Cinder)

Cause

The volume referenced (by UUID) no longer exists, i.e. it has been deleted, but, a hypervisor did not log out its iSCSI connection (likely due to a missed RPC calls, which can result from flaky networking).

Resolution

1) List iSCSI connections for a host.

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2) If a session is present (for the referenced volume UUID), logout the iSCSI connection, passing the target name with -T and the IP:port of the iSCSI portal (typically the Block Storage host – the IP is shown in the previous output) with -p .

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Next to read:
Volume Attachment and Detachment Fails With Error "Flushing test_lv--test_vg failed: oslo_concurrency.processutils.ProcessExecutionError: [Errno 2] No such file or directory: 'multipath'"

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Block Storage Host Reports "Unable to locate Target IQN"ProblemEnvironmentCauseResolution