[ovirt-users] "patched upgrade" from 4.0 (not appliance) => 4.1 (appliance) fails

Thu Mar 9 10:30:31 UTC 2017

Hello, 

I'm trying to upgrade our ovirt-engine from 4.0 (centos manually installed) to 4.1.0 (appliance) using "hosted-engine --upgrade-appliance". 

Our test setup : 
2 hosts with centos 7.3 with ovirt4.0 (latest updates) 
1 ovirt-engine 4.0 (latest update) 

This method uses a manual backup from current engine and injects it to new appliance. Since "old" ovirt-engine is a manually installed 4.0 (latest version) as opposed to an appliance, upgrade process warns that it doesn't recognise the current engine with a somewhat deprecated message : 

[WARNING] Unable to detect engine version 
[WARNING] Unsupported upgrade path 
This procedure has been designed and tested only for upgrading the engine VM from ['3.6'] to ['4.0']. 
Any other usage is highly experimental and potentially dangerous: 
Current engine: unknown 
Selected appliance: 4.1-20170201.1.el7.centos 
Do you want to abort the upgrade process? (Yes, No) [Yes]: no 
[WARNING] Proceeding on an unsupported and highly experimental path 

This fails, according to a bug already posted on https://bugzilla.redhat.com/show_bug.cgi?id=1420283 which is resolved in future 4.1.1 

So I tried to manually patch the file corrected in gerrit https://gerrit.ovirt.org/#/c/71965/ and - after multiple tries - it still fails at the end with the following error : 

... 
[ INFO ] Running engine-setup on the appliance 
|- Preparing to restore: 
|- - Unpacking file '/root/engine_backup.tar.gz' 
|- FATAL: Backup was created by version '4.0' and can not be restored using the installed version 4.1 
|- HE_APPLIANCE_ENGINE_RESTORE_FAIL 
[ ERROR ] Engine backup restore failed on the appliance 
[ ERROR ] Failed to execute stage 'Closing up': engine-backup failed restoring the engine backup on the appliance Please check its log on the appliance. 

When checking upgrade log, there's not much more error information other than : 

2017-03-08 18:08:30 INFO otopi.plugins.gr_he_common.engine.health health._closeup:127 Running engine-setup on the appliance 
2017-03-08 18:08:44 DEBUG otopi.plugins.otopi.dialog.human dialog.__logString:204 DIALOG:SEND |- Preparing to restore: 
2017-03-08 18:08:44 DEBUG otopi.plugins.otopi.dialog.human dialog.__logString:204 DIALOG:SEND |- - Unpacking file '/root/engine_backup.tar.gz' 
2017-03-08 18:08:44 DEBUG otopi.plugins.otopi.dialog.human dialog.__logString:204 DIALOG:SEND |- FATAL: Backup was created by version '4.0' and can not be restored using the installed version 4.1 
2017-03-08 18:08:44 DEBUG otopi.plugins.otopi.dialog.human dialog.__logString:204 DIALOG:SEND |- HE_APPLIANCE_ENGINE_RESTORE_FAIL 
2017-03-08 18:08:44 ERROR otopi.plugins.gr_he_common.engine.health health._closeup:154 Engine backup restore failed on the appliance 
2017-03-08 18:08:44 DEBUG otopi.context context._executeMethod:142 method exception 
Traceback (most recent call last): 
File "/usr/lib/python2.7/site-packages/otopi/context.py", line 132, in _executeMethod 
method['method']() 
File "/usr/share/ovirt-hosted-engine-setup/scripts/../plugins/gr-he-common/engine/health.py", line 158, in _closeup 
'engine-backup failed restoring the engine backup ' 
RuntimeError: engine-backup failed restoring the engine backup on the appliance 
Please check its log on the appliance. 
2017-03-08 18:08:44 ERROR otopi.context context._executeMethod:151 Failed to execute stage 'Closing up': engine-backup failed restoring the engine backup on the appliance 
Please check its log on the appliance. 
2017-03-08 18:08:44 DEBUG otopi.context context.dumpEnvironment:760 ENVIRONMENT DUMP - BEGIN 

In "new" engine setup log, the only thing which catched my eye is : 

2017-03-08 18:08:45 DEBUG otopi.context context.dumpEnvironment:774 ENVIRONMENT DUMP - END 
2017-03-08 18:08:45 DEBUG otopi.context context._executeMethod:128 Stage boot METHOD otopi.plugins.otopi.packagers.dnfpackager.Plugin._boot 
2017-03-08 18:08:45 DEBUG otopi.plugins.otopi.packagers.dnfpackager dnfpackager._boot:163 Cannot initialize minidnf 
Traceback (most recent call last): 
File "/usr/share/otopi/plugins/otopi/packagers/dnfpackager.py", line 150, in _boot 
constants.PackEnv.DNF_DISABLED_PLUGINS 
File "/usr/share/otopi/plugins/otopi/packagers/dnfpackager.py", line 60, in _getMiniDNF 
from otopi import minidnf 
File "/usr/lib/python2.7/site-packages/otopi/minidnf.py", line 16, in <module> 
import dnf 
ImportError: No module named dnf 
2017-03-08 18:08:45 DEBUG otopi.context context.dumpEnvironment:760 ENVIRONMENT DUMP - BEGIN 

I'm not sure if my patched file ( runvm.py ) should be enough to make it work, but maybe this can bring some new information to you. 
Really hopping that 4.1.1 oVirt will resolve this issue as we are eager to start using appliances. 

(I can provide you with more/full log files if necessary) 

cordialement, regards, 

	Nelson LAMEIRAS 
Ingénieur Systèmes et Réseaux / Systems and Networks engineer 
Tel: +33 5 32 09 09 70 
nelson.lameiras at lyra-network.com 

www.lyra-network.com | www.payzen.eu 

Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE 

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