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OLVM: Not Possible to Activate KVM Host With one iSCSI Path Down (Doc ID 2771293.1)

Last updated on JUNE 07, 2021

Applies to:

Linux OS - Version Oracle Linux 7.9 with Unbreakable Enterprise Kernel [5.4.17] and later
Linux x86-64

Symptoms

In an iSCSI Storage Domain that configures a different Target (iqn) per LUN and there are multiple LUNs per Storage Domain or multiple Storage Domains configured.
If one iscsi path fails and the server is restarted it will bounce between non-responsive and non-operational, never becoming online.

 

Changes

In certain iSCSI Storages, when a LUN is created it will create one Target (iqn) per LUN - instead of grouping all LUNs in a single target.
For a host to be operational, he must activate all Storage Domains in 180 seconds (default timeout).

In a storage where all LUNs are in the same target, this is not a problem, because iSCSI only needs to make the login to one target, and then it will activate all LUNs.
In a storage where each LUN is on a different target, the time to login to all iSCSI Targets is multiplied by the number of LUNs.

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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