[ovirt-users] Re: posix storage migration issue on 4.4 cluster
On Tue, Aug 3, 2021 at 5:51 PM Sketch <ovirt(a)rednsx.org> wrote:
I currently have two clusters up and running under one engine. An old
cluster on 4.3, and a new cluster on 4.4. In addition to migrating from
4.3 to 4.4, we are also migrating from glusterfs to cephfs mounted as
POSIX storage (not cinderlib, though we may make that conversion after
moving to 4.4). I have run into a strange issue, though.
On the 4.3 cluster, migration works fine with any storage backend. On
4.4, migration works against gluster or NFS, but fails when the VM is
hosted on POSIX cephfs.
What do you mean by "fails"?
What is the failing operation (move disk when vm is running or not?)
and how does it fail?
...
It appears that the VM fails to start on the new host, but it's
not
obvious why from the logs. Can anyone shed some light or suggest further
debugging?
You move the disk when the vm is not running, and after the move the vm will
not start?
If this is the issue, you can check if the disk was copied correctly by creating
a checksum of the disk before the move and after the move.
Here is example run from my system:
$ cat ~/.config/ovirt.conf
[myengine]
engine_url = https://engine-dev
username = admin@internal
password = mypassword
cafile = /etc/pki/vdsm/certs/cacert.pem
$ python3 /usr/share/doc/python3-ovirt-engine-sdk4/examples/checksum_disk.py
-c myengine 3649d84b-6f35-4314-900a-5e8024e3905c
{
"algorithm": "blake2b",
"block_size": 4194304,
"checksum":
"d92a2491f797c148e9a6c90830ed7bd2f471099a70e931f7dd9d86853d650ece"
}
See https://github.com/oVirt/ovirt-engine-sdk/blob/master/sdk/examples/checks...
Nir