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Posted to issues@cloudstack.apache.org by "Prasanna Santhanam (JIRA)" <ji...@apache.org> on 2013/06/19 16:19:24 UTC
[jira] [Updated] (CLOUDSTACK-649) KVM storage gc does not delete
the invalid snapshots from physical storage
[ https://issues.apache.org/jira/browse/CLOUDSTACK-649?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Prasanna Santhanam updated CLOUDSTACK-649:
------------------------------------------
Priority: Critical (was: Major)
> KVM storage gc does not delete the invalid snapshots from physical storage
> --------------------------------------------------------------------------
>
> Key: CLOUDSTACK-649
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-649
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the default.)
> Components: KVM, Snapshot
> Affects Versions: 4.0.0, 4.0.1
> Reporter: Prasanna Santhanam
> Priority: Critical
>
> When CleanupSnapshotBackupCommand is sent to the SSVM agent because it needs to perform storage GC - outdated snapshots remain undeleted. But the answer returned to mgmt server is success. This is related to CLOUDSTACK-643 where KVM uses a different path to its snapshot backups that includes the zoneid in the path.
> Storage GC fails for KVM:
> Command sent by mgmt server to ssvm:
> 2012-12-17 06:06:12,155 DEBUG [agent.transport.Request] (StorageManager-Scavenger-1:null) Seq 11-575012901: Sending { Cmd , MgmtId: 345050870294, via: 11, Ver: v1, Flags: 100011, [{"CleanupSnapshotBackupCommand":{"secondaryStoragePoolURL":"nfs://mysecstorage/export/home/secondary","dcId":3,"accountId":7,"volumeId":31,"validBackupUUIDs":["/snapshots/3/7/31/any_ROOT-29_20121217000221"],"wait":0}}] }
> Note: KVM path to snapshot includes the zoneid/accountid/volumeid and not just accountid/volumeid like in the case of XenServer
> On the SSVM (with additional warn logs enabled) the response to this command is like follows:
> 1217:271775:2012-12-17 00:32:41,290 DEBUG [cloud.agent.Agent] (agentRequest-Handler-4:) Request:Seq 11-575012901: { Cmd , MgmtId: 345050870294, via: 11, Ver: v1, Flags: 100011, [{"CleanupSnapshotBackupCommand":{"secondaryStoragePoolURL":"nfs://mysecstorage/export/home/secondary","dcId":3,"accountId":7,"volumeId":31,"validBackupUUIDs":["/snapshots/3/7/31/any_ROOT-29_20121217000221"],"wait":0}}] }
> 1218-272164-2012-12-17 00:32:41,291 DEBUG [cloud.agent.Agent] (agentRequest-Handler-4:) Processing command: com.cloud.agent.api.CleanupSnapshotBackupCommand
> 1219-272309-2012-12-17 00:32:41,291 DEBUG [storage.resource.NfsSecondaryStorageResource] (agentRequest-Handler-4:) Executing: mount
> 1220-272430-2012-12-17 00:32:41,293 DEBUG [storage.resource.NfsSecondaryStorageResource] (agentRequest-Handler-4:) Execution is successful.
> 1221-272558-2012-12-17 00:32:41,295 WARN [storage.resource.NfsSecondaryStorageResource] (agentRequest-Handler-4:) didn't find parent snapshot directory at /mnt/SecStorage/cbf2a8fe-fa9f-316e-b8de-d1e291869694//snapshots/7/31
> 1222:272771:2012-12-17 00:32:41,295 DEBUG [cloud.agent.Agent] (agentRequest-Handler-4:) Seq 11-575012901: { Ans: , MgmtId: 345050870294, via: 11, Ver: v1, Flags: 10, [{"Answer":{"result":true,"wait":0}}] }
> The warn message shows the path the ssvm is looking for. Inspite of not finding the snapshot path, we proceed with returning a true answer to mgmt server.
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