From: "Amedeo Salvati" <amedeo(a)oscert.net>
To: users(a)ovirt.org
Sent: Tuesday, November 4, 2014 5:22:24 PM
Subject: [ovirt-users] using ovirt-scheduler-proxy
hello guys,
I'm triyng to use ovirt-scheduler-proxy, and for this, now, I'm starting with
examples available on:
https://github.com/oVirt/ovirt-scheduler-proxy/tree/master/doc/plugin_sam...
so, on ovirt 3.5 fresh installation I've installed ovirt-scheduler-proxy
package (by yum), then I've downloaded from above link
host_memory_balance.py file under /usr/share/ovirt-scheduler-proxy/plugins
directory, I've changed the connection string due to reflect my ovirt engine
hostname/port/user/password, and finally I've started the service:
service ovirt-scheduler-proxy start
on log ovirt-scheduler-proxy.log I got:
[root@engine ovirt-scheduler-proxy]# cat
/var/log/ovirt-scheduler-proxy/ovirt-scheduler-proxy.log
Tue, 04 Nov 2014 16:01:17 INFO [process:MainProcess, thread:MainThread]
Setting up server
Tue, 04 Nov 2014 16:01:17 INFO [process:MainProcess, thread:MainThread]
Loading modules from /usr/share/ovirt-scheduler-proxy/plugins
Tue, 04 Nov 2014 16:01:17 INFO [process:MainProcess, thread:MainThread]
Loading analyzer from /usr/lib/python2.6/site-packages/ovirtscheduler
Tue, 04 Nov 2014 16:01:17 INFO [process:MainProcess, thread:MainThread]
[Request:Main][Method:loadModules] - Trying to load the following files:
['host_memory_balance']
Tue, 04 Nov 2014 16:01:17 DEBUG [process:MainProcess, thread:Thread-1]
[Request:Main][Method:PythonMethodRunner] - running ['python', '-c',
"import
loader; loader.loader().analyze('/usr/share/ovirt-scheduler-proxy/plugins',
'host_memory_balance')"] in /usr/lib/python2.6/site-packages/ovirtscheduler
Tue, 04 Nov 2014 16:01:18 DEBUG [process:MainProcess, thread:MainThread]
[Request:Main][Method:loadModules] - script: ['python', '-c',
"import
loader; loader.loader().analyze('/usr/share/ovirt-scheduler-proxy/plugins',
'host_memory_balance')"]
Tue, 04 Nov 2014 16:01:18 INFO [process:MainProcess, thread:MainThread]
[Request:Main][Method:loadModules] - registering: ('host_memory_balance',
('host_memory_balance', 'do_balance', 'selects a vm from the most
over
utilized vm to migrate.\n if safe_selection is true selects the smallest vm
from the host\n if safe_selection is false try and take a vm larger then the
amount of memory the host is missing',
'minimum_host_memoryMB=[0-9]*;safe_selection=True|False'))
Tue, 04 Nov 2014 16:01:18 INFO [process:MainProcess, thread:MainThread]
[Request:Main][Method:loadModules] - registering::loaded- filters:{}
scores:{} balancers:{'host_memory_balance': ('selects a vm from the most
over utilized vm to migrate.\n if safe_selection is true selects the
smallest vm from the host\n if safe_selection is false try and take a vm
larger then the amount of memory the host is missing',
'minimum_host_memoryMB=[0-9]*;safe_selection=True|False')}
Tue, 04 Nov 2014 16:01:18 INFO [process:MainProcess, thread:MainThread]
Publishing API
[root@engine ovirt-scheduler-proxy]#
but after that on web ui I can't see any change under cluster policy and
under Configure -> Cluster Policies (host_memory_balance balancers is not
displayed)
what did I miss?
- update engine configuration (use ovirt-config --set KEY_NAME=KEY_VALUE):
* ExternalSchedulerServiceURL=http://<host>:18781/
* ExternalSchedulerEnabled=true
- restart ovirt-engine service.
- under configure->cluster_policy see that the balance function was added (should be in
manage policy units- you will see it in the main dialog as well).
- clone current cluster's used cluster policy (probably none - prefer it to have no
balancing modules to avoid conflicts), name it 'your_name' and set it with the
external function
- replace cluster's cluster policy with newly created one (in edit cluster dialog).
Thanks,
Gilad.
Best regards
Amedeo Salvati
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