[openstack-dev] [Rally] Question on periodic task

Ajay Kalambur (akalambu) akalambu at cisco.com
Fri Nov 21 04:22:35 UTC 2014


Ok the action I wanted to perform was for HA I.e execute a scenario like VM boot and in parallel in a separate process , ssh and restart controller node for instance
I thought periodic task would be useful for that. I guess I need to look at some other way of performing this
Ajay


From: Boris Pavlovic <bpavlovic at mirantis.com<mailto:bpavlovic at mirantis.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Date: Thursday, November 20, 2014 at 7:03 PM
To: "OpenStack Development Mailing List (not for usage questions)" <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>
Subject: Re: [openstack-dev] [Rally] Question on periodic task

Hi Ajay,


I am not sure why you are looking that part at all.
everything in openstack/common/* is oslo-incubator code.
Actually that method is not used in Rally yet, except Rally as a Service part that doesn't work yet.

As a scenario developer I think you should be able to find everything here:
https://github.com/stackforge/rally/tree/master/rally/benchmark

So I really don't the case when you need to pass something to periodic task.. It's not that "task"


Best regards,
Boris Pavlovic






On Fri, Nov 21, 2014 at 3:36 AM, Ajay Kalambur (akalambu) <akalambu at cisco.com<mailto:akalambu at cisco.com>> wrote:
Hi
I have a question on
/rally/openstack/common/periodic_task.py

It looks like if I have a method decorated with @periodic_task my method would get scheduled in separate process every N seconds
Now let us say we have a scenario and this periodic_task how does it work when concurrency=2 for instance

Is the periodic task also scheduled in 2 separate process. I actually want only one periodic task process irrespective of concurrency count in scenario
Also as a scenario developer how can I pass arguments into the periodic task


Ajay


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