The compute code currently defines a set of capabilities (info about disk & memory consumption, cpuinfo and a few other things) that are periodically reported up to the scheduler. You can then use the extra_specs to specify key/value pairs for a flavor that will be used by the scheduler's compute_capabilities' filter to make decisions based upon these capabilities. Note you can do relational comparisons on these capabilities, look at:
http://docs.openstack.org/developer/nova/devref/filter_scheduler.html
for details.
Currently, you are limited to the capabilities that are hard coded into the
compute node code. I'm thinking about, and intend to create a blueprint in the
not too distant future, adding a plugin into the compute code so that you can
add support for new capabilities.
--
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: 303/443-3786
From: [email protected]
[mailto:[email protected]] On
Behalf Of Mauch, Viktor (SCC)
Sent: Tuesday, November 06, 2012 3:51 AM
To: Razique Mahroua
Cc: [email protected]
Subject: Re: [Openstack] how to use extra_specs??
Yes sure,
But in this example you use an existing key "free_ram_rmb"?! Ist that right?
What I want to do is to create my own key value paris for compute nodes (who
can I do that) and for the extra_specs variable of the flavors
Best Regards
Viktor
From: Razique Mahroua [mailto:[email protected]]
Sent: Tuesday, November 06, 2012 11:49 AM
To: Mauch, Viktor (SCC)
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [Openstack] how to use extra_specs??
You can also use the cli, does the job too
nova boot --flavor 1 --image 1f3fbdde-4c8a-4b3b-9cf1-a3b9fd0f1d9e --key_name
key1 --hint query='[">=", "free_ram_mb", 1024]' vm1
Nuage & Co - Razique Mahroua
[email protected]<mailto:[email protected]>
[cid:[email protected]]
Le 6 nov. 2012 à 11:46, "Mauch, Viktor (SCC)"
<[email protected]<mailto:[email protected]>> a écrit :
Or being more specific,
How can a add key/value pairs to a compute node???
So I can check the extra_specs data with the key/value paris of the compute
node?
Cheers Viktor
From:
[email protected]<mailto:[email protected]>
[mailto:[email protected]<mailto:[email protected]>]
On Behalf Of Mauch, Viktor (SCC)
Sent: Tuesday, November 06, 2012 11:37 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [Openstack] how to use extra_specs??
Just one more noob question.
Is it normal that If I set a set key/value pair let's say
{"my_special_key":"my_special_value"} to an existing flavor, that the scheduler
failed to find a host for an instance of this flavor.
(I use devstack with folsom stable code)
Cheers Viktor
From: Vinay Bannai [mailto:[email protected]]
Sent: Tuesday, November 06, 2012 5:09 AM
To: Mauch, Viktor (SCC)
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [Openstack] how to use extra_specs??
The simplest way would be to create key/value pairs for flavor types (instance
types).
This information would be associated in a separate table in nova db
(instance_type_extra_specs) and would go along with the instance type.
Once it is in the database, you can use this information to customize all kinds
of things like the nova scheduler, additional data that can be passed to the
instance at the time of the creation. This is the high level overview. If you
search the mailing list archives you will find some additional discussion about
this topic.
Vinay
On Mon, Nov 5, 2012 at 5:57 PM, Mauch, Viktor (SCC)
<[email protected]<mailto:[email protected]>> wrote:
Hi guys,
can anyone tell me (with an example) how to use the extra_specs variable for an
instance_type??
Best Regards
Viktor
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