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I have a question regarding extending oVirt hosted engine disk. I've checked documentation and the is no information about extending hosted-engine disk. I am using FC storage. Until now I have located the correct Logical Volume on a hosted storage domain. My question is can I simply use lvextend on the host currently running the engine or should I use some vdsm tools to extend Logical Volume so that I do not do any harm on hosted_storage Data domain?

Urosp
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  • I'd say lv extend and then resize2fs inside the guest should work. but to confirm you better contact the users@ovirt.org list – dyasny Oct 22 '16 at 12:17

2 Answers2

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So you have a FC LUN presented to this host - presumably this is a single-LUN-to-single-host setup due to you using LVM, if not then you have a problem. If this is the case then sure, extend the LUN, rescan, fdisk, vgextend, lvextend, resize2fs the underlying FS and then do what you need with the hosted disk file.

Chopper3
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  • No it is a FC shared LUN between 4 hosts they all see presented LUN as far as I know sanlock daemon is used for LUN resource locking and sharing on ovirt-ha-agent infrastructure. Maybe there is a vdsm cli tool for resizing and managing storage? One option is to shut down the remaining 3 nodes and resize LV. – Urosp Oct 21 '16 at 12:37
  • for oVirt this is not a problem. it has its own LVM management system that is cluster aware – dyasny Oct 22 '16 at 12:15
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Thank you for answers and tips.

I have successfully extended ovirt hosted engine disk on FC storage. I think it could be done better and more smooth. I think it could be done using vdsm storage mailbox on SPM node.

I did the following:

  1. Moved hosted engine to SPM node (storage master node) with live migration.
  2. hosted-engine has been put to global maintainance mode
  3. Extended lvm with lvmextend -L+30GB LVM_UUID (LVM_UUID is found in /etc/ovirt-hosted-engine/hosted-engine.conf in vm_disk_vol_id and vm_disk_vol_id variables)
  4. Restarted all other nodes hosting ovirt hosted-engine for triggering LVM reload on nodes.
  5. hosted engine shutdown and startup

Commands used on SPM and hosted-engine node:

hosted-engine --set-maintenance --mode=global

lvextend -L+20G /dev/vm_disk_id/vm_disk_vol_id

hosted-engine --vm-shutdown

hosted-engine --check-liveliness

hosted-engine --vm-start

hosted-engine --set-maintenance --mode=none

Community
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Urosp
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  • Now I keep getting this warning: > Failed to update OVF disks OVF data isn't updated on those OVF stores (Data Center oVirt, Storage Domain hosted_storage). > VDSM command failed: Could not acquire resource. Probably resource factory threw an exception.: () – Urosp Oct 26 '16 at 07:14