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https://issues.apache.org/jira/browse/CLOUDSTACK-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Tutkowski reassigned CLOUDSTACK-9917:
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Assignee: Mike Tutkowski
> Root disks stranded on primary storage
> --------------------------------------
>
> Key: CLOUDSTACK-9917
> URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9917
> Project: CloudStack
> Issue Type: Bug
> Security Level: Public(Anyone can view this level - this is the
> default.)
> Components: Management Server
> Affects Versions: 4.10.0.0
> Environment: N/A
> Reporter: Mike Tutkowski
> Assignee: Mike Tutkowski
> Priority: Blocker
> Fix For: 4.10.0.0
>
>
> From dev@
> OK, here’s the gist of the problem:
> In StorageManagerImpl.cleanupStorage(boolean), the following line in 4.9
> List<VolumeVO> vols =
> _volsDao.listVolumesToBeDestroyed(new Date(System.currentTimeMillis() -
> ((long) StorageCleanupDelay.value() << 10)));
> was changed to the following in 4.10
> // ROOT volumes will be destroyed as part of VM cleanup
> List<VolumeVO> vols =
> _volsDao.listNonRootVolumesToBeDestroyed(new Date(System.currentTimeMillis()
> - ((long) StorageCleanupDelay.value() << 10)));
> This leads to a problem (for both managed and traditional storage) in the
> following situation:
> For example: Let’s say we have a system VM running on NFS primary storage.
> We then put this primary storage into maintenance mode, which creates the
> system VM (with the same name) on a different primary storage (we do not
> create a new row in the cloud.vm_instance table for this VM). While this VM
> works, the original root disk of the system VM remains on the original
> primary storage and is not destroyed by the code in
> StorageManagerImpl.cleanupStorage(boolean) in 4.10 because 4.10 (as shown
> above) only asks for non-root volumes to consider for deletion. In the 4.9
> version of the code, the original root disk is cleaned up in
> StorageManagerImpl.cleanupStorage(boolean). The problem with 4.10 relying on
> a root disk always being deleted when the VM it belongs to is deleted is that
> in a situation like this that the system VM doesn’t get deleted at this point
> – it gets a new root disk that’s hosted by a different primary storage (so
> now it’s original root disk is stranded).
> Here is the ticket and the PR where the code change went in:
> https://issues.apache.org/jira/browse/CLOUDSTACK-9660
> https://github.com/apache/cloudstack/pull/1825
> To me, this needs to be fixed before we release 4.10, so I am -1 on this
> RC.
> My suggestion would be to basically revert PR 1825 and to make use of just
> bits and pieces of it.
> For example, this part should be kept:
> -
> volService.expungeVolumeAsync(volFactory.getVolume(vol.getId()));
> + VolumeInfo volumeInfo =
> volFactory.getVolume(vol.getId());
> + if (volumeInfo != null) {
> +
> volService.expungeVolumeAsync(volumeInfo);
> + } else {
> + s_logger.debug("Volume " + vol.getUuid()
> + " is already destroyed");
> + }
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