Don’t know if there’s anything special, it’s been a while since I’ve needed to start it in paused mode. Try putting it in HA maintenance mode from the CLI and then start it in paused mode maybe?

From: Jim Kusznir <jim@palousetech.com>
Subject: Re: [ovirt-users] Upgraded host, engine now won't boot
Date: September 3, 2018 at 1:08:27 PM CDT
To: Darrell Budic
Cc: users

Unfortunately, I seem unable to get connected to the console early enough to actually see a kernel list.

I've tried the hosted-engine --start-vm-paused command, but it just starts it (running mode, not paused).  By the time I can get vnc connected, I have just that last line.  ctrl-alt-del doesn't do anything with it, either.  sending a reset through virsh seems to just kill the VM (it doesn't respawn).

ha seems to have some trouble with this too...Originally I allowed ha to start it, and it would take it a good long while before it gave up on the engine and reset it.  It instantly booted to the same crashed state, and again waited a "good long while" (sorry, never timed it, but I know it was >5 min).

My current thought is that I need to get the engine started in paused mode, connect vnc, then unpause it with virsh to catch what is happening.  Is there any magic to getting it started in paused mode?

On Mon, Sep 3, 2018 at 11:03 AM, Darrell Budic <budic@onholyground.com> wrote:
Send it a ctl-alt-delete and see what happens. Possibly try an older kernel at the grub boot menu. Could also try stopping it with hosted-engine —vm-stop and let HA reboot it, see if it boots or get onto the console quickly and try and watch more of the boot.

Ssh and yum upgrade is fine for the OS, although it’s a good idea to enable Global HA Maintenance first so the HA watchdogs don’t reboot it in the middle of that. After that, run “engine-setup” again, at least if there are new ovirt engine updates to be done. Then disable Global HA Maintenance, and run "shutdown -h now” to stop the Engine VM (rebooting seems to cause it to exit anyway, HA seems to run it as a single execution VM. Or at least in the past, it seems to quit anyway on me and shutdown triggered HA faster). Wait a few minutes, and HA will respawn it on a new instance and you can log into your engine again.
From: Jim Kusznir <jim@palousetech.com>
Subject: Re: [ovirt-users] Upgraded host, engine now won't boot
Date: September 3, 2018 at 12:45:22 PM CDT
To: Darrell Budic
Cc: users


Thanks to Jayme who pointed me to the --add-console-password hosted-engine command to set a password for vnc.  Using that, I see only the single line:

Probing EDD (edd=off to disable)... ok

--Jim

On Mon, Sep 3, 2018 at 10:26 AM, Jim Kusznir <jim@palousetech.com> wrote:
Is there a way to get a graphical console on boot of the engine vm so I can see what's causing the failure to boot?

On Mon, Sep 3, 2018 at 10:23 AM, Jim Kusznir <jim@palousetech.com> wrote:
Thanks; I guess I didn't mention that I started there.

The virsh list shows it in state running, and gluster is showing fully online and healed.  However, I cannot bring up a console of the engine VM to see why its not booting, even though it shows in running state.

In any case, the hosts and engine were running happily.  I applied the latest updates on the host, and the engine went unstable.  I thought, Ok, maybe there's an update to ovirt that also needs to be applied to the engine, so I ssh'ed in and ran yum update (never did find clear instructions on how one is supposed to maintain the engine, but I did see that listed online).  A while later, it reset and never booted again.

-JIm

On Sun, Sep 2, 2018 at 4:28 PM, Darrell Budic <budic@onholyground.com> wrote:
It’s definitely not starting, you’ll have to see if you can figure out why. A couple things to try:

- Check "virsh list" and see if it’s running, or paused for storage. (google "virsh saslpasswd2” if you need to add a user to do this with, it’s per host)
-  It’s hyper converged, so check your gluster volume for healing and/or split brains and wait/resolve those.
- check “gluster peer status” and on each host and make sure your gluster hosts are all talking. I’ve seen an upgrade screwup the firewall, easy fix is to add a rule to allow the hosts to talk to each other on your gluster network, no questions asked (-j ACCEPT, no port, etc).

Good luck!

From: Jim Kusznir <jim@palousetech.com>
Subject: [ovirt-users] Upgraded host, engine now won't boot
Date: September 1, 2018 at 8:38:12 PM CDT
To: users

Hello:

I saw that there were updates to my ovirt-4.2 3 node hyperconverged system, so I proceeded to apply them the usual way through the UI.

At one point, the hosted engine was migrated to one of the upgraded hosts, and then went "unstable" on me.  Now, the hosted engine appears to be crashed:  It gets powered up, but it never boots up to the point where it responds to pings or allows logins.  After a while, the hosted engine shows status (via console "hosted-engine --vm-status" command) "Powering Down".  It stays there for a long time.

I tried forcing a poweroff then powering it on, but again, it never gets up to where it will respond to pings.  --vm-status shows bad health, but up.

I tried running the hosted-engine --console command, but got:

[root@ovirt1 ~]# hosted-engine --console
The engine VM is running on this host
Connected to domain HostedEngine
Escape character is ^]
error: internal error: cannot find character device <null>

[root@ovirt1 ~]# 


I tried to run the hosted-engine --upgrade-appliance command, but it hangs at obtaining certificate (understandably, as the hosted-engine is not up).

How do i recover from this?  And what caused this?

--Jim
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