[snip
engine
1) yum update to update OS
I think versionlock plugin of oVirt will prevent update of its core parts, correct?
correct, version lock will prevent core oVirt packages to be updated.
[snip]
2) reboot
3) update oVirt
NOTE: probably non need d update setup packages, because put in in previous update phase, correct?
correct, setup packages will be updated in previous loop, just run engine-setup here
4) eventually yum update again to see if any packages due to new repo conf
shouldn't be needed but no harm in doing it.
In fact I didn't get anything
engine will be already restarted by engine-setup. If there are no new updates at kernel level no need to reboot again.
just to replicate a future scenario of rebooting and see that previous time all went up ok
hosts
6) put into maintenance
7) simply yum update that will update CentOS packages + oVirt ones (vdsm and such..)
Please use the engine to upgrade hosts, there's a command in webadmin interface for that.
I tried and went well (at least for the first host) as a final result, but the events inside web admin gui don't seem to be well coordinated...
See below the sequence of events I got after selecting
Installation --> Upgrade (and checking the box to migrate running VMs)
one vm running on it was correctly migrated and then the host put into maintenance, but then it seems to me that the following update of vdsmd or other subsysystems tried to got it up again.
In fact I saw in the gui the host coming up, then down, then non operational (the X in the red square)
Then the host rebooted and came in up state again and I was able to manually migrate a VM into it.
One other thing to improve in my opinion is that the upgrade of the host from engine should inject the job that normally once a day checks if a host has available updates: it seems somehow quirky that you pilot host upgrade form engine and engine itself doesn't know that the host has been upgraded (till tomorrow of course...)
Thanks,
Gianluca
Host ov200 upgrade was started (User: user1@my_domain@my_domain). 9/27/19 3:55:10 PM
Migration initiated by system (VM: hostcopy1, Source: ov200, Destination: ov301, Reason: ). 9/27/19 3:55:11 PM
Host ov200 was switched to Maintenance Mode. 9/27/19 3:55:11 PM
Migration completed (VM: hostcopy1, Source: ov200, Destination: ov301, Duration: 13 seconds, Total: 20 seconds, Actual downtime: 88ms) 9/27/19 3:55:31 PM
VDSM ov200 command ConnectStorageServerVDS failed: Connection timeout for host 'ov200.my_domain', last response arrived 22501 ms ago. 9/27/19 3:57:03 PM
Host ov200 is not responding. It will stay in Connecting state for a grace period of 60 seconds and after that an attempt to fence the host will be issued. 9/27/19 3:57:03 PM
..
Host ov200 is non responsive. 9/27/19 3:57:09 PM
Executing power management status on Host ov200 using Proxy Host ov301 and Fence Agent ipmilan:10.4.192.66. 9/27/19 3:57:09 PM
Soft fencing on host ov200 was successful. 9/27/19 3:57:19 PM
VDSM ov200 command ConnectStorageServerVDS failed: Connection timeout for host 'ov200.my_domain', last response arrived 16876 ms ago. 9/27/19 3:59:03 PM
Host ov200 is non responsive. 9/27/19 3:59:03 PM
Executing power management status on Host ov200 using Proxy Host ov301 and Fence Agent ipmilan:10.4.192.66. 9/27/19 3:59:04 PM
No faulty multipath paths on host ov200 9/27/19 3:59:04 PM
Executing power management status on Host ov200 using Proxy Host ov301 and Fence Agent ipmilan:10.4.192.66. 9/27/19 3:59:04 PM
Status of host ov200 was set to NonResponsive. 9/27/19 3:59:17 PM
..
Host ov200 is not responding. It will stay in Connecting state for a grace period of 60 seconds and after that an attempt to fence the host will be issued. 9/27/19 4:00:24 PM
Soft fencing on host ov200 was successful. 9/27/19 4:00:38 PM
VDSM ov200 command ConnectStorageServerVDS failed: Connection timeout for host 'ov200.my_domain', last response arrived 7121 ms ago. 9/27/19 4:00:56 PM
..
Host ov200 was restarted using SSH by the engine. 9/27/19 4:02:31 PM
Upgrade was successful and host ov200 will be rebooted. 9/27/194:02:31 PM
VDSM ov200 command ConnectStorageServerVDS failed: Connection timeout for host 'ov200.my_domain', last response arrived 5341 ms ago. 9/27/19 4:02:46 PM
Host ov200 cannot access the Storage Domain(s) <UNKNOWN> attached to the Data Center MYDC. Setting Host state to Non-Operational. 9/27/19 4:02:46 PM
Failed to connect Host ov200 to Storage Pool MYDC 9/27/19 4:02:46 PM
...
Executing power management status on Host ov200 using Proxy Host ov301 and Fence Agent ipmilan:10.4.192.66. 9/27/19 4:12:27 PM
Status of host ov200 was set to Up. 9/27/19 4:12:27 PM
Host ov200 power management was verified successfully. 9/27/19 4:12:27 PM