How to add a "latest" download point for Atomic Host

[Adam Miller]

Hello all,
    It was requested from members of the Fedora Cloud WG that we
provide a persistent URL that will always offer up the latest Two Week
Atomic Host release from Fedora.

Initially I wrote some code that would handle this in the Two Week
Atomic script[0] but dgilmore brought up a good point that this
removes our ability to easily track what compose any given "latest"
image downloaded at various points of time actually is since it would
overwrite the images in-place (we could maintain a listing of
checksums but that's not ideal). What was then proposed and I like
better is to offer a web endpoint that would do two things:

1) Serve up the latest image for the different image types (something
like getfedora.org/atomic/latest/$IMAGE_TYPE)

2) A simple URL endpoint that would return the actual image name that
is the 'latest' for use by people who want to write scripts to
automate and verify the images. (something like
getfedora.org/atomic/latest/$IMAGE_TYPE/filename)

The needed data is already provided via fedmsg by the Two Week Release
and is used to populate download links for the Atomic page[1] so
hopefully this won't be too much work. I'm also willing to do the work
and just submit the code for review but would like some guidance and
feedback on the topic in general.

Thank you,
-AdamM

[0] -
https://pagure.io/fork/maxamillion/releng/c/9a49e6cfc8ee1b23dc383cbf527b8...
[1] - https://getfedora.org/en/cloud/download/atomic.html

[Robert Mayr]

2016-08-31 17:00 GMT+02:00 Adam Miller <maxamillion(a)fedoraproject.org&gt;:

>  Hello all,
>      It was requested from members of the Fedora Cloud WG that we
>  provide a persistent URL that will always offer up the latest Two Week
>  Atomic Host release from Fedora.
>
>  Initially I wrote some code that would handle this in the Two Week
>  Atomic script[0] but dgilmore brought up a good point that this
>  removes our ability to easily track what compose any given "latest"
>  image downloaded at various points of time actually is since it would
>  overwrite the images in-place (we could maintain a listing of
>  checksums but that's not ideal). What was then proposed and I like
>  better is to offer a web endpoint that would do two things:
>
>  1) Serve up the latest image for the different image types (something
>  like getfedora.org/atomic/latest/$IMAGE_TYPE)
>
>  2) A simple URL endpoint that would return the actual image name that
>  is the 'latest' for use by people who want to write scripts to
>  automate and verify the images. (something like
>  getfedora.org/atomic/latest/$IMAGE_TYPE/filename)
>
>  The needed data is already provided via fedmsg by the Two Week Release
>  and is used to populate download links for the Atomic page[1] so
>  hopefully this won't be too much work. I'm also willing to do the work
>  and just submit the code for review but would like some guidance and
>  feedback on the topic in general.
>
>  Thank you,
>  -AdamM
>
>  [0] - https://pagure.io/fork/maxamillion/releng/c/
>  9a49e6cfc8ee1b23dc383cbf527b896a49bd6a9e
>  [1] - https://getfedora.org/en/cloud/download/atomic.html
>  --
>  websites mailing list
>  websites(a)lists.fedoraproject.org
>  https://lists.fedoraproject.org/admin/lists/websites@
>  lists.fedoraproject.org 

I think this is very specific and would be used by just a few people, but I
might be wrong.
Adding this kind of images just for scripting is probably too much for a
website which is a brochure website. I would rather host them somewhere
else, if you need to have a static URL which always has the latest image.
Getfedora has them, and it's good to keep them with the whole path, date
included.
I would also like to see what the plan is for Atomic, because if we need to
rewrite the cloud pages because Atomic is going to be primary, then we
should not write anything before this happens, IMHO.
Thanks.

-- 
Robert Mayr
(robyduck)

[Adam Miller]

On Wed, Aug 31, 2016 at 3:20 PM, Robert Mayr <robyduck(a)fedoraproject.org&gt; wrote:
>  2016-08-31 17:00 GMT+02:00 Adam Miller
> <maxamillion(a)fedoraproject.org&gt;:
> >
> > Hello all,
> >     It was requested from members of the Fedora Cloud WG that we
> > provide a persistent URL that will always offer up the latest Two Week
> > Atomic Host release from Fedora.
> >
> > Initially I wrote some code that would handle this in the Two Week
> > Atomic script[0] but dgilmore brought up a good point that this
> > removes our ability to easily track what compose any given "latest"
> > image downloaded at various points of time actually is since it would
> > overwrite the images in-place (we could maintain a listing of
> > checksums but that's not ideal). What was then proposed and I like
> > better is to offer a web endpoint that would do two things:
> >
> > 1) Serve up the latest image for the different image types (something
> > like getfedora.org/atomic/latest/$IMAGE_TYPE)
> >
> > 2) A simple URL endpoint that would return the actual image name that
> > is the 'latest' for use by people who want to write scripts to
> > automate and verify the images. (something like
> > getfedora.org/atomic/latest/$IMAGE_TYPE/filename)
> >
> > The needed data is already provided via fedmsg by the Two Week Release
> > and is used to populate download links for the Atomic page[1] so
> > hopefully this won't be too much work. I'm also willing to do the work
> > and just submit the code for review but would like some guidance and
> > feedback on the topic in general.
> >
> > Thank you,
> > -AdamM
> >
> > [0] -
> > https://pagure.io/fork/maxamillion/releng/c/9a49e6cfc8ee1b23dc383cbf527b8...
> > [1] - https://getfedora.org/en/cloud/download/atomic.html
> > --
> > websites mailing list
> > websites(a)lists.fedoraproject.org
> >
> > https://lists.fedoraproject.org/admin/lists/[e-mail]
>
>
>  I think this is very specific and would be used by just a few people, but I
>  might be wrong.
>  Adding this kind of images just for scripting is probably too much for a
>  website which is a brochure website. I would rather host them somewhere
>  else, if you need to have a static URL which always has the latest image.
>  Getfedora has them, and it's good to keep them with the whole path, date
>  included.
>  I would also like to see what the plan is for Atomic, because if we need to
>  rewrite the cloud pages because Atomic is going to be primary, then we
>  should not write anything before this happens, IMHO.
>  Thanks.
>  
If this isn't something that should be done with the website, then we
might be able to handle with download.fedoraproject.org, I'll ping the
Infra Team.

-AdamM

> --
> Robert Mayr
> (robyduck)