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.

Bash

Jan  5 14:34:16 host-1 kernel: Unable to locate Target IQN: iqn.2010-10.org.openstack:volume-80332ca1-617c-434b-b909-e83c4c42a6d3 in Storage Node
Jan  5 14:34:16 host-1 kernel: iSCSI Login negotiation failed.

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.

Bash

# iscsiadm -m session -P 3

1. 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 .

Bash

# iscsiadm -m node -T iqn.2010-10.org.openstack:volume-80332ca1-617c-434b-b909-e83c4c42a6d3 -p 172.30.0.194:3260 --logout