[PVE-User] 'asymmetrix storage' and migration...

Marco Gaiarin gaio at sv.lnf.it
Thu Jul 15 14:48:56 CEST 2021


I'm a bit puzzled.


A little 'ZFS' cluster, with two asymmetrical nodes; second node is
there only, just in case, to run some little VMs (PBX, firewall, ...).

First node have a second RAIDZ volume called 'rpool-data', that does
not exist on second node; eg, storage.conf is:

 dir: local
	path /var/lib/vz
	content iso,vztmpl,backup

 zfspool: local-zfs
	pool rpool/data
	content images,rootdir
	sparse 1

 zfspool: rpool-data
	pool rpool-data
	content images,rootdir
	mountpoint /rpool-data
	sparse 1

Clearly on node 2 'rpool-data' have a question mark.


I've tried to migrate a VMs from node 2 to 1 that have disks only on 'local-zfs':

 root at brpve1:~# grep ^scsi /etc/pve/nodes/brpve2/qemu-server/100.conf 
 scsi0: local-zfs:vm-100-disk-0,size=100G
 scsi1: local-zfs:vm-100-disk-1,backup=0,size=1000G
 scsi2: local-zfs:vm-100-disk-2,backup=0,size=500G
 scsihw: virtio-scsi-pci

but i get:

 2021-07-15 14:14:54 starting migration of VM 100 to node 'brpve1' (10.15.5.21)
 zfs error: cannot open 'rpool-data': no such pool
 zfs error: cannot open 'rpool-data': no such pool
 2021-07-15 14:14:54 ERROR: Problem found while scanning volumes - could not activate storage 'rpool-data', zfs error: cannot import 'rpool-data': no such pool available
 2021-07-15 14:14:54 aborting phase 1 - cleanup resources
 2021-07-15 14:14:54 ERROR: migration aborted (duration 00:00:00): Problem found while scanning volumes - could not activate storage 'rpool-data', zfs error: cannot import 'rpool-data': no such pool available
 TASK ERROR: migration aborted


Because in 'rpool-data' currently we have no data, i've simply disabled
storage 'rpool-data', migrate the machine and then re-enabled back.


Why migration does not work, even if there's no disks in 'rpool-data'?

Thre's some way to 'fake' an 'rpool-data' on the second node, only to
have PVE not to complain?


Thanks.

-- 
dott. Marco Gaiarin				        GNUPG Key ID: 240A3D66
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  marco.gaiarin(at)lanostrafamiglia.it   t +39-0434-842711   f +39-0434-842797

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