[ovirt-users] Warning: CentOS Upgrade with Host Engine - 503 Service Temporarily Unavailable

[Yedidyah Bar David]

On Thu, Mar 15, 2018 at 5:39 PM, Andrei Verovski <andreil1 at starlett.lv> wrote:
> Hi !
>
> I have upgraded CentOS 7.4 with oVirt 4.2.1 host engine (with yum upgrade),
> and its resulted in broken system - "503 Service Temporarily Unavailable"
> when connecting to the host engine via web.
> Service ovirt-engine failed to starts (logs attached at the bottom of this
> email), other ovirt services seem to run fine.
>
> yum update "ovirt-*-setup*” (upgrade 4.2 -> 4.2.1)
> engine-setup
> yum upgrade (OS upgrade)
>
> Is this issue somehow related to JDK as described here?
> https://bugzilla.redhat.com/show_bug.cgi?id=1217023

Not very likely. This is a very old bug.

>
> New packages:
> java-1.8.0-openjdk                      x86_64   1:1.8.0.161-0.b14.el7_4
> java-1.8.0-openjdk-devel                x86_64   1:1.8.0.161-0.b14.el7_4
> java-1.8.0-openjdk-headless             x86_64   1:1.8.0.161-0.b14.el7_4
>
> installed packages (seem to be also 1.8x):
> [root at node00 ~]# rpm -qa | grep jdk
> java-1.8.0-openjdk-1.8.0.151-5.b12.el7_4.x86_64
> java-1.8.0-openjdk-devel-1.8.0.151-5.b12.el7_4.x86_64
> java-1.8.0-openjdk-headless-1.8.0.151-5.b12.el7_4.x86_64
> copy-jdk-configs-2.2-5.el7_4.noarch

Indeed. Some versions of the engine could work with both openjdk 1.7
and 1.8, but recent versions require 1.8.

>
> Since my host engine is actually a KVM appliance under another SuSE server,
> I simply discarded it and reverted back old qcow2 image.

OK. Any chance you kept a copy, or at least more logs, for further debugging?

>
> So this is a warning to anyone - don’t upgrade CentOS, or at least keep a
> copy of disk image before ANY upgrade !

Having regular backups, both before significant changes like upgrades
and also routine, on-going, is always a good idea :-)

If you have all of server.log, we can try to understand the cause for
the failure. If not, and you try again to upgrade and if fails again,
please share all relevant logs before reverting to the backup. Thanks!

Best regards,
-- 
Didi