OK, I understand, I would need to upgrade my Hosts to go to 3.6.

I think I read somewhere I can't mix EL6 and EL7 hosts in the same cluster, is this true?
Or can I just have 1 host EL7 and another running EL6 in the same cluster.
Idea is to upgrade all hosts, but I do not have enough spare hosts to upgrade all at once to el7 without downtime.
So I am looking for a way to upgrade my hosts smoothly...

Best Regards,
Paul Groeneweg


Op do 12 nov. 2015 om 10:27 schreef Simone Tiraboschi <stirabos@redhat.com>:
On Thu, Nov 12, 2015 at 9:52 AM, Paul Groeneweg | Pazion <paul@pazion.nl> wrote:
That looks like the issue...

I am running Centos 6 and I read  https://bugzilla.redhat.com/show_bug.cgi?id=1206231 
Is it possible to build the packages form source or is my only option upgrading to Centos7? 

3.6 compatibility level requires el7 hosts; we didn't built vdsm for el6 and I don't think it will just about rebuild.
So you can upgrade your hosts to el7 to gain the new 3.6 features or you can remain at 3.5 compatibility level.
 

Can I have a mix of Centos 6 and 7 in my DC/Cluster? ( otherwise I need to upgrade/migrate all VMS? )

The point is not about upgrading your VMs but about your hosts.
You'll cluster could not be upgrade to 3.6 level till you have one active host with vdsm 4.16.z
 

Met vriendelijke groeten,
Paul Groeneweg


Op do 12 nov. 2015 om 09:38 schreef Simone Tiraboschi <stirabos@redhat.com>:
On Thu, Nov 12, 2015 at 9:03 AM, Paul Groeneweg | Pazion <paul@pazion.nl> wrote:
I have finished the upgrade to 3.6.
I received a lot (every 3 seconds ) of the following messages in the logs after upgrading the hosts:

 vdsm jsonrpc.JsonRpcServer ERROR Internal server error#012Traceback (most recent call last):#012  File "/usr/lib/python2.6/site-packages/yajsonrpc/__init__.py", line 501, in _serveRequest#012    res = method(**params)#012  File "/usr/share/vdsm/rpc/Bridge.py", line 291, in _dynamicMethod#012    return self._fixupRet(className, methodName, ret)#012  File "/usr/share/vdsm/rpc/Bridge.py", line 235, in _fixupRet#012    self._typeFixup('return', retType, result)#012  File "/usr/share/vdsm/rpc/Bridge.py", line 215, in _typeFixup#012    if k in item:#012TypeError: argument of type 'NoneType' is not iterable

I restarted ovirt-ha-agent ovirt-ha-broker and vdsmd.
After I rebooted all hosts ( migrating VMS from one to another ) the message finally disappeared.

Then I tried to set compatibility Version to 3.6, but without luck. I have put hosted engine back in global maintenance, but I can't find out why it fails. The message says "Error while executing action: Cannot change Cluster Compatibility Version to higher version when there are active Hosts with lower version.
-Please move Hosts with lower version to maintenance first."

I have installed ovirt-release36 on hosted engine and hosts.
I have updated hosted engine with engine-setup.
I ran yum update on all hosts.
What do I need to do to set compatibility version to 3.6?

Please check the software tab in the host panel for each of your host, if the upgrade has been performed you should see something like 'VDSM Version: vdsm-4.17.10.1-0.el7.centos', if vdsm is still at 4.16.z that host is still on 3.5.
 
And how can I enable repository for hosted engine? ( through WEB UI change is not saved ).



Best Regards,
Paul Groeneweg

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Webdevelopment  -  Hosting  -  Apps

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