container_cleaner.py: keep the last 30 snapshots

[johanneskastl]

Due to the rapid release of Tumbleweed, keeping the last 5 snapshots per architecture means we only have a week old image for x86_64 at most...

Keeping 30 snapshots should not be a big hit on storage, according to @dirkmueller

Discussion see this thread

[Vogtinator]

Keeping 30 snapshots should not be a big hit on storage, according to @dirkmueller

I think it's a very big hit, as it needs 6x the storage and likely processing power as well: For every additional image in the project, publishing gets a bit slower. There's no deduplication, as most images contain the TW snapshot number and get rebuilt for every new snapshot.

Currently with 5 snapshots it needs about 608GB:

> osc api /build/openSUSE:Containers:Tumbleweed/_result?view=binarylist | xmllint - --xpath "/resultlist/result/binarylist/binary[not(contains(@filename, '.tar'))]/@size" | awk -F'"' 'BEGIN { total=0 } /size/ { total += $2 } END { print total " B" }' | qalc -f -
608016158483 bytes ≈ 608,0161585 GB

With 30 snapshots it would be over 3.5TB...

[Vogtinator]

Discussion see this thread

For Tumbleweed, using :latest is the most sensible option: You don't get any security or bug fixes in previous images, and if you install packages, you always get the latest snapshot (unless you try to use the https://download.opensuse.org/history/ repo).

For Leap, container images are (for now) kept indefinitely.

[Vogtinator]

Currently with 5 snapshots it needs about 608GB:

I asked Adrian to have a look on the backend server directly and apparently it's about 389GiB.