On 11/17/2017 01:09 AM, Ramu, MohanX wrote:
Thank you Jay.
I am trying to understand usage of custom traits is that
I have a custom trait called "CUSTOM_ABC" which is associated with Resource Provider "Resource
provider-1" , So I can launch the instance which is having flavor/image associated with same custom
traits (CUSTOM_ABC) only on the Resource Provider "Resource provider-1" .
As mentioned in my response below, we're currently working on adding
this functionality to Nova for the Queens release. The work is in this
patch series:
https://review.openstack.org/#/q/status:open+project:openstack/nova+branch:master+topic:validate_provider_summaries
You will need to wait for the Queens release for the complete
traits-based scheduling functionality to be operational.
Best,
-jay
-----Original Message-----
From: Jay Pipes [mailto:jaypi...@gmail.com]
Sent: Thursday, November 16, 2017 9:10 PM
To: Ramu, MohanX <mohanx.r...@intel.com>
Cc: openstack@lists.openstack.org
Subject: Re: Traits for filter
On 11/16/2017 12:06 AM, Ramu, MohanX wrote:
Hi All,
I have a use case that I need to apply some filter (Custom traits)
while Placement API fetch the resource providers for launching instance.
So that I can have list of resource provided which meets my
condition/filter/validation. The validation is nothing but trust about
the Host(compute node) where I am going to launch the instances.
The below link says that it is possible, don't have idea how to
implement/test this scenario.
https://specs.openstack.org/openstack/nova-specs/specs/ocata/implement
ed/resource-providers-scheduler-db-filters.html
we would rather make a HTTP call to the placement API on a specific
REST resource with a request that would return the list of resource
providers' UUIDs that would match requested resources and traits
criterias based on the original RequestSpec object.
Unfortunately, you're going to need to wait for this to be possible with the
placement API. We're making progress here, but it's not complete yet.
You won't be using a custom filter (or any filter at all in the
nova-scheduler). Rather, you'll simply have the required trait in the image or
flavor and nova-scheduler will ask placement API for all providers that have
the required traits and requested resource amounts.
We're probably 3-4 weeks away from having this code merged.
Best,
-jay
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