What are some reliable methods to migrate a guest between clusters with minimal downtime? I have successfully backed up guest on cluster1, scp file to cluster2 host and restored, but this takes minutes, and I would rather take seconds similar to a live migration between hosts in same cluster. I have seen proxmove in searches, but haven't tried it yet. I was also thinking of rsyncing guest files to cluster2 while guest is running, then power off guest and rsync again, and then power up guest on cluster2. Would that work? If anyone has used proxmove, rsync, or other means to quickly migrate guest to other clusters, please let me know how it worked out for you.
methods to quickly and reliably migrate guests between clusters
- Thread starter Dale.Sykora
- Start date
Hi,
you can migrate VM/CT Data if you use ZFS with pve-zsync.[1]
This will sync the VM/CT disk data and then you can start the VM on the other side.
1.) https://pve.proxmox.com/wiki/PVE-zsync
you can migrate VM/CT Data if you use ZFS with pve-zsync.[1]
This will sync the VM/CT disk data and then you can start the VM on the other side.
1.) https://pve.proxmox.com/wiki/PVE-zsync
Thanks wolfgang! I don't use ZFS currently. Currently use NFS shared storage on a SAN. I could try setting up and testing ZFS, but would rather not go to that trouble. I have an old PVE 5.4 cluster, and a new PVE 6.2 cluster, and would like to move 10 guests from old cluster to new with minimal downtime for guest users.
What if I did the following... Would that work?
1)setup a NFS share for cluster1
2)moved guest disk to it while guest online
3)powered off guest
4)removed NFS share from cluster1
5)added NFS share to cluster2
6)started guest on cluster2
What if I did the following... Would that work?
1)setup a NFS share for cluster1
2)moved guest disk to it while guest online
3)powered off guest
4)removed NFS share from cluster1
5)added NFS share to cluster2
6)started guest on cluster2
I was able to quickly (under a minute) and successfully migrate the guest between clusters by changing shared storage as follows.
guest=109, old cluster/host=c1/n1, new cluster/host=pc1/p1, and nfs storage shared to one cluster at a time named nfs0
1)make sure nfs0 is not shared to cluster pc1, and share nfs0 to cluster c1
2)while guest is running, move guest disk to nfs0 storage
3)while guest is running, backup guest 109 to non nfs0 storage on cluster c1 host n1 and scp backup to host p1
4)restore 109 backup on p1 to any available storage, but do not start
5)scp guest config file /etc/pve/qemu-server/109.conf file from host n1 to same location on host p1
6)shutdown guest on host n1
7)remove nfs0 storage from cluster c1
8)add nfs0 storage to cluster pc1
9)start guest 109 on host p1
10)move guest disk to another storage location on host p1
11)remove storage nfs0 from cluster pc1
steps 3 and 4 might not be necessary, but not sure
guest=109, old cluster/host=c1/n1, new cluster/host=pc1/p1, and nfs storage shared to one cluster at a time named nfs0
1)make sure nfs0 is not shared to cluster pc1, and share nfs0 to cluster c1
2)while guest is running, move guest disk to nfs0 storage
3)while guest is running, backup guest 109 to non nfs0 storage on cluster c1 host n1 and scp backup to host p1
4)restore 109 backup on p1 to any available storage, but do not start
5)scp guest config file /etc/pve/qemu-server/109.conf file from host n1 to same location on host p1
6)shutdown guest on host n1
7)remove nfs0 storage from cluster c1
8)add nfs0 storage to cluster pc1
9)start guest 109 on host p1
10)move guest disk to another storage location on host p1
11)remove storage nfs0 from cluster pc1
steps 3 and 4 might not be necessary, but not sure
This is not required.
The config that is needed did you copy in step 5.
And die VMData are copied in step 2