Patrick-
We've enhanced `nova-manage' to manipulate the `extra_specs' entries, c.f.
https://blueprints.launchpad.net/nova/+spec/update-flavor-key-value, You can
add an `extra_specs' key/value pair to a flavor with the command:
nova-manage instance_type add_key m1.humongous cpu_type itanium
And delete a key/value pair with the command:
nova-manage instance_type del_key m1.humongous cpu_type
We're in the process of enhancing `python-novaclient' and Horizon with similar
capabilities and hope to have them ready for the Folsom release.
Currently, there's no hook to set `extra_specs' through the `nova.conf' file,
the mechanism is to dynamically add the `extra_specs' key/values after the
administrator has created a flavor.
Currently, the keys are completely free form but there are some issues with
that so that should change. Checkout the bug:
https://bugs.launchpad.net/nova/+bug/1039386
Based upon that bug we need to put some sort of scope on the keys to indicate
which components a key applies to. I'm in favor of adding a new column to the
`extra_specs' table that would explicitly set the scope but an alternative
would be to encode the scope into the key itself, something like
`TrustedFilter:trust' to indicate that the `trust' key only applies to the
`TrustedFilter' scheduler component. Feel free to chime in on the BZ entry on
how to specify the scope, once we decide on how to deal with this I'll create a
patch to handle it.
--
Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: 303/443-3786
From: [email protected]
[mailto:[email protected]] On
Behalf Of Patrick Petit
Sent: Friday, August 24, 2012 7:13 AM
To: [email protected] ([email protected])
Subject: [Openstack] [Nova] Instance Type Extra Specs clarifications
Hi,
Could someone give a practical overview of how configuring and using the
instance type extra specs extension capability introduced in Folsom?
If how extending an instance type is relatively clear.
Eg.: #nova-manage instance_type set_key --name=<my.instancetype> --key
<cpu_arch> --value <'s== x86_64'>
The principles of capability advertising is less clearer. Is it assumed that
the key/value pairs are always declared statically as flags in nova.conf of the
compute node, or can they be generated dynamically and if so, who would that
be? And also, are the keys completely free form strings or strings that are
known (reserved) by Nova?
Thanks in advance for clarifying this.
Patrick
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