Renaming ZFS pools (in use)

[robnavrey]

Hi,

I have a 2 node cluster with local ZFS pools.

Until today, I had 2 active NICS:

- first for the virtual machines network access
- other dedicated for the cluster

Today, I added a third NIC I intended to use for zfs replication. Everything went fine, until I tried to start the first replication task. It complained that the storage name is not the same:

2020-10-21 18:05:03 100-0: (remote_prepare_local_job) storage 'SATA_pool_PVE1' is not available on node 'pve2'

What I currently have is:

- pve1:
- SSD_POOL_PVE1 -> 1 vm
- SATA_pool_PVE1 -> 3 vm
- pve2:
- SSD_POOL_PVE2 -> 0 vm
- SATA_pool_PVE2 -> 4 vm

How could I enable replication, without losing data (and the minimum downtime)?

Regards,

 

[mira]

If you want to rename a pool, you can do so by exporting and then importing it under a different name. But to do this the pool can't be in use.
Both the PVE Storage name, as well as the ZFS pool name have to match on both nodes for replication.

 

[robnavrey]

Hi,

already did that for the pool that wasn't in use:

- deactivaded the pool through the web gui
- zpool export SSD_POOL_PVE2
- zpool import SSD_POOL_PVE2 SSD_POOL_PVE1

After a couple of tries, I understood the changes to be made in the storage.cfg, and this pool is already OK.

But what could I do with the pools already in use? Turn off the virtual machines, follow the same procedure and then edit their config files (located at /etc/pve/nodes/pve*/qemu-server/*.conf) and change the disk locations?

Thanks in advance,

 

[mira]

Yes, make sure nothing is using/accessing the pool. Then you should be able to export the pool.
Once the pool is imported under the right name you can update the storage definition as well as the VM configs to use the new one.