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

[Nir Soffer]

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.

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.
>> Image::(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-
>> ab22-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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