Open Stack

Hi,

On Sun, Feb 18, 2018 at 10:25 PM, Ian Wienand <iwienand at redhat.com> wrote:

> Hi,
>
> How should we go about restricting certain image builds to specific
> nodepool builder instances?  My immediate issue is with ARM64 image
> builds, which I only want to happen on a builder hosted in an ARM64
> cloud.
>
> Currently, the builders go through the image list and check "is the
> existing image missing or too old, if so, build" [1].  Additionally,
> all builders share a configuration file [2]; so builders don't know
> "who they are".
>
>

Why not just split the builder configuration file? I don't see a need to
add code
to do this.




> I'd propose we add an arbitrary tag/match system so that builders can
> pickup only those builds they mark themselves capable of building?
>
> e.g. diskimages would specify required builder tags similar to:
>
> ---
> diskimages:
>   - name: arm64-ubuntu-xenial
>     elements:
>       - block-device-efi
>       - vm
>       - ubuntu-minimal
>       ...
>     env-vars:
>       TMPDIR: /opt/dib_tmp
>       DIB_CHECKSUM: '1'
>       ...
>     builder-requires:
>       architecture: arm64
> ---
>
> The nodepool.yaml would grow another section similar:
>
> ---
> builder-provides:
>   architecture: arm64
>   something_else_unique_about_this_buidler: true
> ---
>
> For OpenStack, we would template this section in the config file via
> puppet in [2], ensuring above that only our theoretical ARM64 build
> machine had that section in it's config.
>
> The nodepool-buidler build loop can then check that its
> builder-provides section has all the tags specified in an image's
> "builder-requires" section before deciding to start building.
>
> Thoughts welcome :)
>
> -i
>
> [1] https://git.openstack.org/cgit/openstack-infra/nodepool/
> tree/nodepool/builder.py#n607
> [2] https://git.openstack.org/cgit/openstack-infra/project-
> config/tree/nodepool/nodepool.yaml
>
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>



-- 
David Shrewsbury (Shrews)
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