The number of distros on my disk and in the docker images list has grown over time.
That leads to a situation that even some terrabyte of disk space may face some pressure.
Instead of copying the data from the sync-dir into the container, it is also possible
to mount the repo data. This is generally handled by specs in ~/.config/docker_mirror.ini.
Instead of ubunturepo or opensuserepo or centosrepo you
need to run two targets for each repo version.
make ubuntubase.24.04make ubuntudisk.24.04
As a result it will print out the values needed for docker_mirror.ini.
Note that you can not directly mount the sync-dirs. They are broken into multiple pieces ('base' and 'update' repos) and their metadata index is often broken. This is fixed when copying the data into the repo-image container -or- when the '.disk' directory is created. The rpm/deb files themselves are hardlinked into the '.disk' directory, so they do not consume extra space.
(Technical detail: to hardlink a file in Unix means that the same inode has multiple file names. Writing to such a file may update the data in two locations. The repodata-fix.py script will therefore backup the old package.xml and create a new file in the '.disk' area. So that file is not hardlinked with the sync-dir).
The docker_mirror.ini can hold overrides that are used to start a repo-container
via docker_mirror.py. Here's what I have as of 2024. This allows me to
./docker_mirror.py --local start almalinux:9.4 --add-hosts -vvv
docker_mirror.ini:
[almalinux:9.4-20240530]
image = localhost:5000/mirror-packages/almalinux-repo/base:9.4
mount = /dock/docker-mirror-packages/almalinux.9.4-20240530.disk/srv/repo
[opensuse/leap:15.4]
image = localhost:5000/mirror-packages/opensuse-repo/base:15.4
mount = /dock/docker-mirror-packages/opensuse.15.4.disk/srv/repo
[opensuse/leap:15.5]
image = localhost:5000/mirror-packages/opensuse-repo/base:15.5
mount = /dock/docker-mirror-packages/opensuse.15.5.disk/srv/repo
[opensuse/leap:15.6]
image = localhost:5000/mirror-packages/opensuse-repo/base:15.6
mount = /dock/docker-mirror-packages/opensuse.15.6.disk/srv/repo
[ubuntu:20.04]
image = localhost:5000/mirror-packages/ubuntu-repo/base:20.04
mount = /dock/docker-mirror-packages/ubuntu.20.04.disk/srv/repo
[ubuntu:22.04]
image = localhost:5000/mirror-packages/ubuntu-repo/base:22.04
mount = /dock/docker-mirror-packages/ubuntu.22.04.disk/srv/repo
[ubuntu:24.04]
image = localhost:5000/mirror-packages/ubuntu-repo/base:24.04
mount = /dock/docker-mirror-packages/ubuntu.24.04.disk/srv/repo