Document how to consume ELN composes

[davide125]

Composes for ELN don't seem to be shipped to the mirror network, so they need to be fetched from https://odcs.fedoraproject.org/composes/production/latest-Fedora-ELN/

This makes it a bit tricky to find a safe way to maintain a local mirror of a copy of the latest compose (e.g. for testing or CI purposes), so it'd be great to document that. Specifically:

• how to make sure the "latest" compose is actually finished and fit for consumption
• whether it's acceptable to just wget -r from odcs or if there's better ways (e.g. rsync, which doesn't seem to be exposed on that host though)
• how often it would be ok to do something like that (in my case, it'd probably be once a week)

Alternatively, if these could be added to the mirror network akin to the Rawhide composes that would make things easier.

Thanks!

[praiskup]

Having mirroring would be helpful. Copr build failures are very frequent in ELN repositories, compared to others that build from mirrors. E.g.:
https://download.copr.fedorainfracloud.org/results/pemensik/bind-9.16/fedora-eln-x86_64/02100466-bind/builder-live.log.gz

[davide125]

Discussed in today's meeting, need to sort out #39 first, then revisit https://pagure.io/fedora-infrastructure/issue/9730

[sgallagher]

#39 is now resolved, so this effort can be resumed now.

[praiskup]

Is there ETA for this? I'm asking because we would like to release new mock-core-configs with mirrored
ELN repos soon (2-4 weeks).

[davide125]

rsync://dl.fedoraproject.org/fedora-eln is now available, which makes it possible to mirror ELN efficiently. Facebook has a mirror up at https://mirror.facebook.net/fedora-eln/ but I'm not aware of any others. Still need to update the documentation.

[praiskup]

Does it make sense to configure mirror manager even though there is only one mirror?

[praiskup]

Gently ping, any progress on ELN mirroring?

[sgallagher]

Currently there's still no effort underway to set up mirror manager for ELN. The Facebook mirror is the de-facto solution we're using right now, but if we get to a point where the traffic necessitates it, we'll look into a larger mirror network.

[praiskup]

The Facebook mirror is the de-facto solution we're using right now

How do you configure the repositories? Using two baseurl= options?

[sgallagher]

@davide125 Can you answer @praiskup here?

[michel-slm]

How do you configure the repositories? Using two baseurl= options?

Yes; see https://dnf.readthedocs.io/en/latest/conf_ref.html?highlight=baseurl#baseurl-label

List the URLs in order of the one you want to try first (the Facebook mirror). one URL per line.