[ovirt-users] ovirt-ha-agent cpu usage

Wed Oct 5 10:33:43 UTC 2016

On Wed, Oct 5, 2016 at 10:34 AM, Nir Soffer <nsoffer at redhat.com> wrote:

> On Wed, Oct 5, 2016 at 10:24 AM, Simone Tiraboschi <stirabos at redhat.com>
> wrote:
>
>>
>>
>> On Wed, Oct 5, 2016 at 9:17 AM, gregor <gregor_forum at catrix.at> wrote:
>>
>>> Hi,
>>>
>>> did you found a solution or cause for this high CPU usage?
>>> I have installed the self hosted engine on another server and there is
>>> no VM running but ovirt-ha-agent uses heavily the CPU.
>>>
>>
>> Yes, it's due to the fact that ovirt-ha-agent periodically reconnects
>> over json rpc and this is CPU intensive since the client has to parse the
>> yaml API specification each time it connects.
>>
>
> Simone, reusing the connection is good idea anyway, but what you describe
> is
> a bug in the client library. The library does *not* need to load and parse
> the
> schema at all for sending requests to vdsm.
>
> The schema is only needed if you want to verify request parameters,
> or provide online help, these are not needed in a client library.
>
> Please file an infra bug about it.
>

Done, https://bugzilla.redhat.com/show_bug.cgi?id=1381899
Thanks.

> Nir
>
>
>> The issue is tracked here:
>> https://bugzilla.redhat.com/show_bug.cgi?id=1349829 - ovirt-ha-agent
>> should reuse json-rpc connections
>> but it depends on:
>> https://bugzilla.redhat.com/show_bug.cgi?id=1376843 - [RFE] Implement a
>> keep-alive with reconnect if needed logic for the python jsonrpc client
>>
>>
>>
>>>
>>> cheers
>>> gregor
>>>
>>> On 08/08/16 15:09, Gianluca Cecchi wrote:
>>> > On Mon, Aug 8, 2016 at 1:03 PM, Roy Golan <rgolan at redhat.com
>>> > <mailto:rgolan at redhat.com>> wrote:
>>> >
>>> >     Does the spikes correlates with info messages on extracting the
>>> ovf?
>>> >
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > yes, it seems so and it happens every 14-15 seconds....
>>> >
>>> > These are the lines I see scrolling in agent.log when I notice cpu
>>> > spikes in ovirt-ha-agent...
>>> >
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:07,815::storage_server::212::ovirt_hosted_engine_ha.li
>>> b.storage_server.StorageServer::(connect_storage_server)
>>> > Connecting storage server
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:08,144::storage_server::220::ovirt_hosted_engine_ha.li
>>> b.storage_server.StorageServer::(connect_storage_server)
>>> > Refreshing the storage domain
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:08,705::hosted_engine::685::ovirt_hosted_engine_ha.age
>>> nt.hosted_engine.HostedEngine::(_initialize_storage_images)
>>> > Preparing images
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:08,705::image::126::ovirt_hosted_engine_ha.lib.image.I
>>> mage::(prepare_images)
>>> > Preparing images
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:09,653::hosted_engine::688::ovirt_hosted_engine_ha.age
>>> nt.hosted_engine.HostedEngine::(_initialize_storage_images)
>>> > Reloading vm.conf from the shared storage domain
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:09,653::config::205::ovirt_hosted_engine_ha.agent.host
>>> ed_engine.HostedEngine.config::(refresh_local_conf_file)
>>> > Trying to get a fresher copy of vm configuration from the OVF_STORE
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:09,843::ovf_store::100::ovirt_hosted_engine_ha.lib.ovf
>>> .ovf_store.OVFStore::(scan)
>>> > Found OVF_STORE: imgUUID:223d26c2-1668-493c-a322-8054923d135f,
>>> > volUUID:108a362c-f5a9-440e-8817-1ed8a129afe8
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:10,309::ovf_store::100::ovirt_hosted_engine_ha.lib.ovf
>>> .ovf_store.OVFStore::(scan)
>>> > Found OVF_STORE: imgUUID:12ca2fc6-01f7-41ab-ab22-e75c822ac9b6,
>>> > volUUID:1a18851e-6858-401c-be6e-af14415034b5
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:10,652::ovf_store::109::ovirt_hosted_engine_ha.lib.ovf
>>> .ovf_store.OVFStore::(getEngineVMOVF)
>>> > Extracting Engine VM OVF from the OVF_STORE
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:10,974::ovf_store::116::ovirt_hosted_engine_ha.lib.ovf
>>> .ovf_store.OVFStore::(getEngineVMOVF)
>>> > OVF_STORE volume path:
>>> > /rhev/data-center/mnt/ovirt01.lutwyn.org:_SHE__DOMAIN/31a9e9
>>> fd-8dcb-4475-aac4-09f897ee1b45/images/12ca2fc6-01f7-41ab-ab2
>>> 2-e75c822ac9b6/1a18851e-6858-401c-be6e-af14415034b5
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:11,494::config::225::ovirt_hosted_engine_ha.agent.host
>>> ed_engine.HostedEngine.config::(refresh_local_conf_file)
>>> > Found an OVF for HE VM, trying to convert
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:11,497::config::230::ovirt_hosted_engine_ha.agent.host
>>> ed_engine.HostedEngine.config::(refresh_local_conf_file)
>>> > Got vm.conf from OVF_STORE
>>> > MainThread::INFO::2016-08-08
>>> > 15:03:11,675::hosted_engine::462::ovirt_hosted_engine_ha.age
>>> nt.hosted_engine.HostedEngine::(start_monitoring)
>>> > Current state EngineUp (score: 3400)
>>> >
>>> >
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