Open Stack

Hello,

The variables documented in each of the roles defaults/ are generally what
you can consider a user level interface (i.e.: what you can modify), while
the variables from vars/ are generally what's best to avoid overriding.

We've been slowly phasing out variables insides templates, to exclusively
rely on config_template overrides (See also: [1] and [2])
Please note that if a variable is deprecated, we are issuing a release note.

[1]: https://github.com/openstack/openstack-ansible-os_nova/blob/
4b9100a612ba0e9449d792b2783b9ec50a8fb28e/tasks/nova_post_install.yml#L40
[2]: https://docs.openstack.org/project-deploy-guide/
openstack-ansible/ocata/app-advanced-config-override.html

Best regards,
JP


On Tue, Aug 22, 2017 at 1:24 PM, Markus Zoeller <mzoeller at linux.vnet.ibm.com
> wrote:

> On 22.08.2017 09:46, Flávio Ramalho wrote:
> > Hi Markus,
> >
> > I think you can achieve what you want by simple overriding the host
> > variables, for example:
> >
> > In /etc/openstack_deploy/openstack_user_config.yml:
> > compute_hosts:
> >    compute1:
> >      ip: 192.168.100.12
> >      host_vars:
> >        nova_reserved_host_memory_mb: 256
> >    compute2:
> >      ip: 192.168.100.10
> >
> > In this case you would have compute1 with reserved_host_memory_mb = 256
> and
> > compute2 with the default value set for nova_reserved_host_memory_mb.
> >
> >
> > Flávio
>
> Oh, I didn't see those variables, good hint! I'll give it a try, maybe
> that's good enough for me. Thanks a lot Flavio!
>
> http://git.openstack.org/cgit/openstack/openstack-ansible-os
> _nova/tree/templates/nova.conf.j2
>
> Despite that this will probably work, is that an "interface" I'm allowed
> to touch or is it considered an "internal/private" part of
> OpenStack-Ansible (and/or its roles)?
>
> --
> Regards, Markus Zoeller (markus_z)
>
>
> > On Mon, Aug 21, 2017 at 6:09 PM Markus Zoeller <
> mzoeller at linux.vnet.ibm.com>
> > wrote:
> >
> >> On 21.08.2017 16:40, Andy McCrae wrote:
> >>> Hey Markus,
> >>>
> >>>
> >>>> I'm wondering which possibilities I have to do group/host specific
> >>>> config file overrides. After reading [1], I'm still a little clueless.
> >>>> To be specific, I have this setup (expressed as Ansible inventory
> file):
> >>>>
> >>>>     [z_compute_nodes]
> >>>>     compute1
> >>>>     # more nodes
> >>>>     [x_compute_nodes]
> >>>>     compute2
> >>>>     # more nodes
> >>>>     [computes:children]
> >>>>     z_compute_nodes
> >>>>     x_compute_nodes
> >>>>
> >>>> As an example, I want to set Nova's config option
> >>>> `reserved_host_memory_mb` of the `DEFAULT` config file section:
> >>>>
> >>>>     ### nova.conf
> >>>>     [DEFAULT]
> >>>>     reserved_host_memory_mb=$VALUE
> >>>>
> >>>> My goal is this:
> >>>>
> >>>>              | reserved_host_memory_mb
> >>>>     ----------------------------------
> >>>>     compute1 |         256
> >>>>     compute2 |         512
> >>>>
> >>>> I know there are overrides like `nova_nova_conf_overrides`.
> >>>> So I tried to set a default override in `user_variables.yml`:
> >>>>
> >>>>     ### /etc/openstack_deploy/user_variables.yml --------
> >>>>
> >>>>     nova_nova_conf_overrides:
> >>>>       DEFAULT:
> >>>>         reserved_host_memory_mb: 512
> >>>>
> >>>> But I wanted to override this depending on the host in
> >>>> `openstack_user_config.yml`:
> >>>>
> >>>>     ### /etc/openstack_deploy/openstack_user_config.yml --------
> >>>>     # [...]
> >>>>     # nova hypervisors
> >>>>     compute_hosts:
> >>>>       compute1:
> >>>>         ip: 192.168.100.12
> >>>>         host_vars:
> >>>>           nova_nova_conf_overrides:
> >>>>             DEFAULT:
> >>>>               reserved_host_memory_mb: 256
> >>>>       compute2:
> >>>>         ip: 192.168.100.10
> >>>>
> >>>
> >>> Try change "host_vars" to "container_vars".
> >>> If that doesn't work let me know, I'll spin up a test to recreate the
> >>> actual problem, but at a glance that looks correct otherwise.
> >>>
> >>
> >>
> >> Replacing `host_vars` with `container_vars` didn't have an effect:
> >>
> >>     ### controller1: /etc/openstack_deploy/openstack_user_config.yml
> >>     # nova hypervisors
> >>     compute_hosts:
> >>       compute1:
> >>         ip: 192.168.100.12
> >>         container_vars:
> >>           nova_nova_conf_overrides:
> >>                 DEFAULT:
> >>                     reserved_host_memory_mb: 256
> >>       compute2:
> >>         ip: 192.168.100.10
> >>
> >> Both compute nodes still have the same $VALUE, although `compute1`
> >> should have 256:
> >>
> >>     ### compute1: /etc/nova/nova.conf
> >>     root at compute1:~# grep reserved_host_memory_mb /etc/nova/nova.conf
> >>     reserved_host_memory_mb = 512
> >>
> >>
> >>     ### compute2: /etc/nova/nova.conf
> >>     root at compute2:~# grep reserved_host_memory_mb /etc/nova/nova.conf
> >>     reserved_host_memory_mb = 512
> >>
> >> I'd like to avoid to introduce some "clever" dict merging algorithm I
> >> won't understand anymore after a few weeks. :/
> >>
> >> Any hint is appreciated!
> >>
> >> --
> >> Regards, Markus Zoeller (markus_z)
> >>
> >>>>
> >>>> After testing this locally, it turned out that *both* hosts will
> >>>> have 512 for $VALUE. which was not my intended configuration.
> >>>>
> >>>> Please note that I only used 2 hosts here as an example but I'm
> looking
> >>>> for a solution which scales with much more hosts. I'm also applying
> >>>> those settings in a templated way like this:
> >>>>
> >>>>     ### /etc/openstack_deploy/openstack_user_config.yml --------
> >>>>     # [...]
> >>>>     # nova hypervisors
> >>>>     compute_hosts:
> >>>>     {% for host in groups['computes'] %}
> >>>>       {{ hostvars[host]['inventory_hostname'] }}:
> >>>>         ip: {{ hostvars[host]['ansible_host'] }}
> >>>>     {% endfor %}
> >>>>
> >>>> The reason is, that I use the same steps for different environments
> >>>> (dev, test, prod) with a different amount of nodes.
> >>>>
> >>>> Any tips how to do this properly?
> >>>>
> >>>>
> >>> Andy
> >>>
> >>>
>
>
> __________________________________________________________________________
> OpenStack Development Mailing List (not for usage questions)
> Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20170822/125bc707/attachment.html>