Librarian doesn't remove expired files

[Stuart Bishop]

LibraryFileAlias records can be given an expiry date, but the Librarian Garbage Collector never removes them.

For every LibraryFileContent, if there are no unexpired LibraryFileAlias records referencing it it should get its 'deleted' flag set. The existing rules will take care of the rest.

[Stuart Bishop (stub)]

Should be a simple fix, but it needs solid tests. Losas can increase importance if disk usage starts scaring them again.

[Tom Haddon (mthaddon)]

We are back to 3% free disk space on the librarian server.

[Tom Haddon (mthaddon)]

Based on current space usage estimates, we're going to run out in about 2-3 weeks.

[Stuart Bishop (stub)]

Landed as r7509.

Relevant changed files are lib/canonical/librarian/librariangc.py and cronscripts/librarian-gc.py if you want to avoid a full cherry pick - just copying them to mizuho and running the garbage collector once should free up some space and keep us alive until next full rollout.

[Francis J. Lacoste (flacoste)]

That was cherry-picked to Mizuho today.