Deploy Mirrorbits

[olblak]

This Pull request deploys mirrorbits and a Redis database on Kubernetes.

In order to consider this PR as a full replacement of mirrors.jenkins.io, we still need to validate the following things

• Validate that it's effectively working :)
• Automate mirror configuration
• Make it working for Redis sentinel

Currently, this service is accessible from the VPN but empty at the moment

Update /etc/hosts with release.mirrors.jenkins.io set to 10.0.2.5

Example: https://release.mirrors.jenkins.io/debian/jenkins_2.218_all.deb?mirrorlist

or https://release.mirrors.jenkins.io/debian/jenkins_2.218_all.deb?mirrorstats
https://release.mirrors.jenkins.io/debian/jenkins_2.218_all.deb?stats

[olblak]

I did a few more tests, and made it working with few limitations:

1. mirror configuration needs to be manually done as Mirrorbits doesn't provide a different way than using the cli
2. I wasn't able to use redis sentinelle for High availibilty purpose.

[olblak]

Mirrorbit requires a folder with all the files that can be provided.
If for some reason the requested file has a hash that mismatched between one of the mirrors and Mirrorbits then the mirror is not used.

Similar to here, they are different ways to synchronize data on Mirrorbit:

1. Mirrobits data is populated on a push approach like from here. this brings strong dependency on sync.sh and Mirrrobits becomes the source of truth for artifacts
2. Mirrorbits data is generated on a pull approach, similar to [here|https://github.com/[INFRA-2466] Deploy archives.jenkins-ci.org on publick8s #130#issue-378916917], in this case, we need to ensure that Mirrorbits is always in sync with the source of truth.

I have a preference for the latter approach where we consider Mirroribts as an independent service we still have the capability to manually trigger a sync using kubectl exec...

[olblak]

I just opened a Pull request here to provision an azure file storage to hold those files

[olblak]

I am going to merge this pull request, I manually deployed get.jenkins.io using this code, and I am not planning to work on it for now.