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sneak/ubuntumirror

Docker container for syncing bionic ubuntu LTS mirrors to reduce network traffic and speed up build times.

Then even your builds (where you can't specify links) will go fast.

Levers

MIRROR_ARCHITECTURES
- default amd64.
- You may want i386,amd64.
MIRROR_CATEGORIES
- default main,universe.
- You may want main,universe,restricted,multiverse. Will use lots of disk.
UBUNTU_MIRROR_PROJECTS
- default xenial,xenial-updates,xenial-security,xenial-backports,bionic,bionic-updates,bionic-security,bionic-backports.
UBUNTU_MIRROR_SOURCE
- default archive.ubuntu.com.
- You may want xx.archive.ubuntu.com (where xx is your country code).
MIRROR_INTERVAL_SECONDS - mirror sync interval
- default 43200 (12h)
- You may want 10800 (3h)

apt update && apt -y install dnsmasq
echo address=/mirrors.ubuntu.com/172.17.0.1 > /etc/dnsmasq.d/ubuntu-mirror-local

Then, just add --dns 172.17.0.1 to your /etc/default/docker opts and bounce the docker daemon. Future containers will talk to your local mirror.