On 26.01.2020 17.19, Kristian Klausen via arch-mirrors wrote:
Hi
I'm considering setting up a Arch Linux mirror and I'm considering a
different design.
Hi
I just got time to implement this and the setup looks like this:
Cloudflare -> Cloudflare Workers -> Backblaze B2 bucket <- Tier1 mirror
The files is synced from mirror.ams1.nl.leaseweb.net every hour to the
Backblaze B2 bucket and they are fetched from the bucket with the help
of a Cloudflare Workers script.
Cloudflare is configured to cache everything (size <=2GB*), database
files is cached for 5 minute everything else is cached for 24 hours.
* CF is sponsoring a plan with a higher limit than the 512MB default
I have done some quick testing, and time to first byte isn't impressive
(at least not when downloading from Europe), but the speed is acceptable
(80-100MB/s is achievable if the file is cached, and 8-12MB/s if not
(tested from Europe)).
To make it easier to implement, I took some shortcuts:
* Directory listing isn't implemented
* "latest" files isn't synced
* Only packages in "pool/" is synced, the package files in the different
repo isn't synced, but if you request a package
(\.pkg\.tar\.(xz|zst)(|.sig)$) it is automatic retrieved from the pool/
directory. This means that you can download ex Firefox from both:
https://archlinux.amirror.xyz/extra/os/x86_64/firefox-73.0.1-1-x86_64.pkg.tar.zst
https://archlinux.amirror.xyz/community/os/x86_64/firefox-73.0.1-1-x86_64.pkg.tar.zst
I'm not sure if the shortcuts is acceptable, but it can be fixed if it
is a issue.
Also please note that: archive, other and sources isn't synced.
Feel free to try it out: https://archlinux.amirror.xyz/
Best regards
Kristian Klausen
So instead of mirroring the whole thing, the idea is to mirror only
the database files (core.db etc) and download the packages on demand
from a Tier 1 mirror (and let nginx cache them). By doing it that way,
I only download requested packages from the Tier 1 mirrors, instead of
downloading the whole thing (saving Tier 1 bandwidth).
To provide even better performance a CDN (ex: Cloudflare) could be
used to provide more caching. So we end up with a setup like this:
Cloudflare -> Nginx cache -> Tier1 mirrors (nginx with multiple upstream)
Do I miss something? Is this a bad idea?
If I do setup a mirror like that, is there any chance it could be
added as a official mirror?
Best regards
Kristian Klausen
