On 8/16/2016 12:39 AM, Afek, Ifat (Nokia - IL) wrote:
On 15/08/2016, 19:29, "Matt Riedemann" <[email protected]> wrote:
On 8/15/2016 4:24 AM, Afek, Ifat (Nokia - IL) wrote:
Hi,
In Vitrage project[1], I would like to add an option to call nova host-evacuate
for a failed host. I noticed that there is an api for ‘nova evacuate’, and a
cli (but no api) for ‘nova host-evacuate’. Is there a way that I can call 'nova
host-evacuate’ from Vitrage code? Did you consider adding host-evacuate to nova
api? Obviously it would improve the performance for Vitrage use case.
Some more details: The Vitrage project is used for analysing the root cause of
OpenStack alarms, and deducing their existence before they are directly
observed. It receives information from various data sources (Nova, Neutron,
Zabbix, etc.) performs configurable actions and notifies other projects like
Nova.
For example, in case zabbix detect a host NIC failure, Vitrage calls nova
force-down api to indicate that the host is unavailable. We would like to add
an option to evacuate the failed host.
Thanks,
Ifat.
[1] https://wiki.openstack.org/wiki/Vitrage
This blog post will probably be helpful:
http://www.danplanet.com/blog/2016/03/03/evacuate-in-nova-one-command-to-confuse-us-all/
The 'nova host-evacuate' CLI is a convenience CLI, it's not for a
specific API, it just takes a host, finds the instances running on that
host and evacuates each of them. You could do something similar in vitrage.
--
Thanks,
Matt Riedemann
Thanks Matt,
I already read this blog :-)
I asked about moving the cli code to the api, because performance-wise it would
help us.
Thanks,
Ifat.
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That's not going to happen, it's orchestration which Nova is trying to
avoid adding more of that to the REST API.
--
Thanks,
Matt Riedemann
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