Consider adding mirrors to dockerfiles to avoid unavailability of archive.ubuntu.com causing a build failure

[slonka]

Description

Recently we experienced an issue (link) with

Unable to connect to archive.ubuntu.com:80

if we add mirrors /etc/apt/sources.list that could make it more reliable

[jijiechen]

Dockerfiles are used in many places, including local builds and on different CI runners, etc.
I'm thinking while adding a static mirror may benefit some scenarios, it can also bring negative effects to other scenarios. So at least this needs to be configurable.

[slonka]

negative effects to other scenarios

can you go into details of this? how can an additional mirror have negative effects?

[slonka]

If you're worried about throughput then AFAIK there are tools that detect the closes mirror based on throughput and set up sources.list accordingly.

[slonka]

https://apt-mirror.github.io/ could work

[jijiechen]

Yeah, a public mirror may work.
By negative effects I meant when the mirror is not correctly configured, it may break some builds. For example, if we configure it to use Hetzner mirror, then the build will not work on other places.

[slonka]

I'm only planning on using public mirrors

[slonka]

closed via #11809