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https://issues.apache.org/jira/browse/CLOUDSTACK-251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471761#comment-13471761
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Nik Martin commented on CLOUDSTACK-251:
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I can, the patch looks simple enough, I'll patch my Cloudstack and then take a
SAN offline.
> If one primary storage is put into maintenance mode, entire cloud goes down.
> CS 3.02
> ------------------------------------------------------------------------------------
>
> Key: CLOUDSTACK-251
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-251
> Project: CloudStack
> Issue Type: Bug
> Components: Storage Controller
> Affects Versions: pre-4.0.0
> Environment: Cloudstack 3.02 on Centos, Xenserevr 6.2 Hypervisors
> Reporter: Nik Martin
> Assignee: Anthony Xu
> Priority: Critical
> Labels: storage
> Fix For: pre-4.0.0
>
>
> I have two SANs in a cluster, both are Primary storage. One is HD based,and
> one is SSD based. I use storage tags "HD" and "SSD" respectively. The HD
> based SAN is a single 20TB volume, with 1 iSCSI target, and 1 LUN. The SSD
> SAN is two 5TB volumes, each with 1 target, and 1 LUN each, in an
> Active-Active configuration. The SSD SAN suffered from a mis-configuration
> issue, so we had to put it into maintenance mode in a hurry, and shut it
> down. I fully expected the Volumes and VMs provisioned on the SSD SAN to be
> unavailable. The problem is Cloudstack continued to try to access Volume id
> 204, which is Target0 on the SSD san. It shut every VM down, and put all
> Hypervisors into Alert state, and went into a loop trying to connect to a
> volume that is in maintenance mode. This creates a very bad situation for me
> and my customers. My entire cloud was offline until we could re-synchronize
> the Active-Actibve volumes on the SSD SAN and bring it back online
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