On Thu, Feb 2, 2017 at 3:51 PM, Nir Soffer <nsoffer@redhat.com> wrote:

> Can you confirm that the host can be active when I restart vdsmd service?

Sure. This may abort a storage operation if one is running when you restart
vdsm, but vdsm is designed so you can restart or kill it safely.

For example, if you abort a disk copy in the middle, the operation will fail
and the destination disk will be deleted.

If you want to avoid such issue, you can put a host to maintenance, but this
requires migration of vms to other hosts.

Nir

OK. Created 50_thin_block_extension_rules.conf under /etc/vdsm/vdsm.conf.d and restarted vdsmd

One last (latest probably... ;-) question
Is it expected that if I restart vdsmd on the host that is the SPM, then SPM is shifted to another node?
Because when restarting vdsmd on the host that is not SPM I didn't get any message in web admin gui and restart of vdsmd itself was very fast.
Instead on the host with SPM, the command took several seconds and I got these events 

Feb 2, 2017 4:01:23 PM Host ovmsrv05 power management was verified successfully.
Feb 2, 2017 4:01:23 PM Status of host ovmsrv05 was set to Up.
Feb 2, 2017 4:01:19 PM Executing power management status on Host ovmsrv05 using Proxy Host ovmsrv06 and Fence Agent ilo:10.4.192.212.
Feb 2, 2017 4:01:18 PM Storage Pool Manager runs on Host ovmsrv06 (Address: ovmsrv06.datacenter.polimi.it).
Feb 2, 2017 4:01:13 PM VDSM ovmsrv05 command failed: Recovering from crash or Initializing
Feb 2, 2017 4:01:11 PM Host ovmsrv05 is initializing. Message: Recovering from crash or Initializing
Feb 2, 2017 4:01:11 PM VDSM ovmsrv05 command failed: Recovering from crash or Initializing
Feb 2, 2017 4:01:11 PM Invalid status on Data Center Default. Setting Data Center status to Non Responsive (On host ovmsrv05, Error: Recovering from crash or Initializing).
Feb 2, 2017 4:01:11 PM VDSM ovmsrv05 command failed: Recovering from crash or Initializing
Feb 2, 2017 4:01:05 PM Host ovmsrv05 is not responding. It will stay in Connecting state for a grace period of 80 seconds and after that an attempt to fence the host will be issued.
Feb 2, 2017 4:01:05 PM Host ovmsrv05 is not responding. It will stay in Connecting state for a grace period of 80 seconds and after that an attempt to fence the host will be issued.
Feb 2, 2017 4:01:05 PM VDSM ovmsrv05 command failed: Connection reset by peer

Thanks
Gianluca