On Thu, Mar 11, 2021 at 05:06:30PM +0000, Richard W.M. Jones wrote: > > https://download.fedoraproject.org/pub/fedora/linux/releases/33/Cloud/x86_64/images/Fedora-Cloud-Base-33-1.2.x86_64.raw.xz > > You probably won't be able to observe this easily, but if you > repeatedly download this file (or ideally, just do a HEAD request) > then occasionally you'll hit a mirror that returns a 404.
Yep. > At the time of writing mirror.genesisadaptive.com was offered as a > redirect, but it does not have the file. > (https://mirror.genesisadaptive.com/fedora/releases/33/Cloud/x86_64/images/Fedora-Cloud-Base-33-1.2.x86_64.raw.xz) Right. mirrormanager has a list of mirrors that are 'up to date' and redirects you to one of those. However, it doesn't know if that mirror has every single file or image on it. :( > This is a problem for some cloud software we're writing that would > like to pull the image on demand when people request a Fedora 33 VM. Well, if you are getting the f33 release image, it's never ever going to change. You could store it locally? > It breaks unpredictably, and telling the "occasional 404" case from > the "the URL is wrong" case is hard. Yeah. ;( > Is there anything that can be done so the mirrors which don't have the > file are not offered up as redirects? Not easily I don't think. That would require mirrormanager to look at every single file on the entire mirror and store them for every mirror. ;( You could file a RFE on mirrormanager about this if you like. I thought we had one, but I can't seem to find it. I guess https://github.com/fedora-infra/mirrormanager2/issues/166 is close. We also have a cloudfront cache: https://d2lzkl7pfhq30w.cloudfront.net/ you could use... or there is the master mirror at dl.fedoraproject.org, but I don't think we want everyone to use that. :) kevin
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