On Wed, Mar 20, 2019 at 7:35 AM <excli...@mail.ru> wrote:
>
> 19.03.2019 on the server with the ovirt engine, I reinstalled the GUI and it 
> seemed to delete the ovirt-engine, in any case, the installed ovirt-engine 
> packages were not. I reinstalled the ovirt-engine package, but could not 
> connect to the web interface. There are such errors in the 
> /var/log/ovirt-engine/engine.log:
>
> 2019-03-20 11:37:12,660+09 INFO  
> [org.ovirt.engine.core.extensions.mgr.ExtensionsManager] (ServerService 
> Thread Pool -- 58) [] Initializing extension 'internal-authz'
> 2019-03-20 11:37:12,661+09 ERROR 
> [org.ovirt.engine.extension.aaa.jdbc.binding.api.AuthzExtension] 
> (ServerService Thread Pool -- 58) [] Unexpected Exception invoking: 
> EXTENSION_INITIALIZE[e5ae1b7f-9104-4f23-a444-7b9175ff68d2]
> 2019-03-20 11:37:12,662+09 ERROR 
> [org.ovirt.engine.core.extensions.mgr.ExtensionsManager] (ServerService 
> Thread Pool -- 58) [] Error in activating extension 'internal-authz': 
> Connection refused. Check that the hostname and port are correct and that the 
> postmaster is accepting TCP/IP connections.
> 2019-03-20 11:37:12,662+09 ERROR 
> [org.ovirt.engine.core.sso.utils.SsoExtensionsManager] (ServerService Thread 
> Pool -- 58) [] Could not initialize extension 'internal-authz'. Exception 
> message is: Class: class 
> org.ovirt.engine.core.extensions.mgr.ExtensionInvokeCommandFailedException
> ...
> 2019-03-20 11:37:13,046+09 ERROR 
> [org.ovirt.engine.ui.frontend.server.dashboard.DashboardDataServlet] 
> (ServerService Thread Pool -- 44) [] Could not access engine's DWH 
> configuration table: java.sql.SQLException: javax.resource.ResourceException: 
> IJ000453: Unable to get managed connection for java:/ENGINEDataSource
> ...
> 2019-03-20 11:37:13,049+09 WARN  
> [org.ovirt.engine.ui.frontend.server.dashboard.DashboardDataServlet] 
> (ServerService Thread Pool -- 44) [] No valid DWH configurations were found, 
> assuming DWH database isn't setup.
> 2019-03-20 11:37:13,049+09 INFO  
> [org.ovirt.engine.ui.frontend.server.dashboard.DashboardDataServlet] 
> (ServerService Thread Pool -- 44) [] Dashboard DB query cache has been 
> disabled.
>
> ovirt-engine-4.2.8.2-1
> CentOS 7,  3.10.0-693.2.2.el7.x86_64
>
> I have a backup file, but version 4.1. Recovering from it using engine-backup 
> is impossible.
> I also have a backup /etc before deleting the ovirt-engine.
>
> Как мне восстановить ovirt-engine?

Please provide more details. What exactly did you do?

If it's something like:

yum install ovirt-engine
engine-setup
yum remove ovirt-engine
yum install ovirt-engine

then:
1. Recovering from that is not supported nor tested, so take the
following with a grain of salt.
2. The biggest damage from 'yum remove' is removal of pki. You should
find a backup, though, in /etc/pki/ovirt-engine-backups/something. You
can try to restore that to /etc/pki/ovirt-engine and see what happens.
3. You can also simply try running 'engine-setup'. It should recreate
pki. This will also then require reinstalling all hosts (or at least
"Enroll Certificate").
4. Alternatively, you can try using your 4.1 engine-backup. Best way
is by installing 4.1, restoring the backup, then upgrading.
Alternatively, you can patch engine-backup to not refuse restoring the
older version, see e.g.
https://bugzilla.redhat.com/show_bug.cgi?id=1425788 .
5. Alternatively, you can compare your current /etc with the backup
you took, and carefully decide which files should be restored. Then
you can try running 'egnine-setup' and see what happens. Obviously,
this is the best option in terms of chances for success, but is also
the most time-consuming.

Good luck and best regards,
-- 
Didi
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