[Bug 1858412] Re: systemd vacuuming does not work for remote journals

[Dan Streetman]

eoan:

ubuntu at lp1858412-e:~$ dpkg -l systemd|grep systemd
ii  systemd        242-7ubuntu3.7 amd64        system and service manager
ubuntu at lp1858412-e:~$ du -sh /var/log/journal/remote
273M	/var/log/journal/remote
ubuntu at lp1858412-e:~$ sudo journalctl -D /var/log/journal/remote --vacuum-size=10M
ubuntu at lp1858412-e:~$ du -sh /var/log/journal/remote
273M	/var/log/journal/remote


ubuntu at lp1858412-e:~$ dpkg -l systemd|grep systemd
ii  systemd        242-7ubuntu3.8 amd64        system and service manager
ubuntu at lp1858412-e:~$ du -sh /var/log/journal/remote
273M	/var/log/journal/remote
ubuntu at lp1858412-e:~$ sudo journalctl -D /var/log/journal/remote --vacuum-size=10M
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000000001-0005a4f93261040f.journal (8.0M).
Deleted archived journal /var/log/journal/remote/user-1000 at 63c462cb3bfe42d8aae1a91b4d2711a6-0000000000000435-0005a4f935a960b5.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-00000000000013e8-0005a4fb05e4c7ef.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-00000000000013ec-0005a4fb092ed6af.journal (8.0M).
Deleted archived journal /var/log/journal/remote/user-1000 at 63c462cb3bfe42d8aae1a91b4d2711a6-00000000000014fe-0005a4fb271141e0.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001941-0005a4fb29d41b99.journal (8.0M).
Deleted archived journal /var/log/journal/remote/user-1000 at 63c462cb3bfe42d8aae1a91b4d2711a6-0000000000001993-0005a4fbc19b8de5.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001ca3-0005a4fbc267c680.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001dd8-0005a4fbc464346b.journal (8.0M).
Deleted archived journal /var/log/journal/remote/user-1000 at 0110cef9e4a8457ba44cf2e309034570-0000000000001de1-0005a4fbc5523608.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001df2-0005a4fbc93c71d7.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001df4-0005a4fbf7e6a339.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001df7-0005a4fc2dbe7958.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001dfe-0005a4fc2f8efc30.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001dff-0005a4fc4181be1d.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e02-0005a4fc7bce3298.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e06-0005a4fc7dddc828.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e09-0005a4fc91a3f7ed.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e10-0005a4fc9373a53e.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e11-0005a4fca1309488.journal (8.0M).
Deleted archived journal /var/log/journal/remote/system at 106304fba7e24f4eaa633c524dee66e4-0000000000001e6e-0005a4fca379da83.journal (8.0M).
Vacuuming done, freed 168.0M of archived journals from /var/log/journal/remote.
ubuntu at lp1858412-e:~$ du -sh /var/log/journal/remote
105M	/var/log/journal/remote



** Tags removed: verification-needed-eoan
** Tags added: verification-done-eoan

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https://bugs.launchpad.net/bugs/1858412

Title:
  systemd vacuuming does not work for remote journals

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Xenial:
  Fix Committed
Status in systemd source package in Bionic:
  Fix Committed
Status in systemd source package in Disco:
  Won't Fix
Status in systemd source package in Eoan:
  Fix Committed

Bug description:
  [impact]

  attempting to vacuum journals using -D with the 'root' (in journald
  terms) journal directory fails to perform any vacuuming.  This can
  lead to journal files continually increasing in size and filling up
  the filesystem.

  [test case]

  see original description below.

  [regession potential]

  this removes a check in the code when iterating journal directories
  during vacuuming, so any regression would likely occur during
  vacuuming, possibly causing failure to vacuum.

  [scope]

  this is fixed upstream by commit
  c488660e6edb3c1375ab62514a8df035c3d712bf which is included starting in
  version 244, so this is already included in Focal.  This is needed for
  Eoan, Bionic, and Xenial.

  [original description]

  systemd has an issue in regard to vacuuming remote journals:
  https://github.com/systemd/systemd/issues/2376 - this affects 18.04 as
  this version still has this problem.

  Steps to reproduce on "Description:     Ubuntu 18.04.3 LTS":

  root at 1:~# du -hs /var/log/journal/remote/
  8.6G	/var/log/journal/remote/
  root at 1:~# journalctl -D /var/log/journal/remote --vacuum-size=100M
  root at 1:~# du -hs /var/log/journal/remote/
  8.6G	/var/log/journal/remote/

  Would it be possible to backport this trivial patch
  https://github.com/systemd/systemd/pull/13924 into 18.04?

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