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Commit Graph

8 Commits

Author SHA1 Message Date
Zbigniew Jędrzejewski-Szmek
953bf4604f units: add system-update-cleanup.service to guard against offline-update loops
Note: the name is "system-update-cleanup.service" rather than
"system-update-done.service", because it should not run normally, and also
because there's already "systemd-update-done.service", and having them named
so similarly would be confusing.

In https://bugzilla.redhat.com/show_bug.cgi?id=1395686 the system repeatedly
entered system-update.target on boot. Because of a packaging issue, the tool
that created the /system-update symlink could be installed without the service
unit that was supposed to perform the upgrade (and remove the symlink). In
fact, if there are no units in system-update.target, and /system-update symlink
is created, systemd always "hangs" in system-update.target. This is confusing
for users, because there's no feedback what is happening, and fixing this
requires starting an emergency shell somehow, and also knowing that the symlink
must be removed. We should be more resilient in this case, and remove the
symlink automatically ourselves, if there are no upgrade service to handle it.

This adds a service which is started after system-update.target is reached and
the symlink still exists. It nukes the symlink and reboots the machine. It
should subsequently boot into the default default.target.

This is a more general fix for
https://bugzilla.redhat.com/show_bug.cgi?id=1395686 (the packaging issue was
already fixed).
2016-11-29 01:40:34 -05:00
Zbigniew Jędrzejewski-Szmek
2b656050b6 man: update the description of offline updates
- use "service" instead of "script", because various offline updaters that we have
  aren't really scripts, e.g. dnf-plugin-system-upgrade, packagekit-offline-update,
 fwupd-offline-update.
- strongly recommend After=sysinit.target, Wants=sysinit.target
- clarify a bit what should happen when multiple update services are started
- replace links to the wiki with refs to the man page that replaced it.
2016-11-29 01:40:34 -05:00
Jakub Wilk
b17649ee5e man: fix typos (#4527) 2016-10-31 08:08:08 -04:00
Zbigniew Jędrzejewski-Szmek
2ac5fe9525 man: fix some internal man page references
sd_journal-query_enumerate was an early draft, the name was changed
to sd_j_enumerate_fields.
2016-08-06 16:39:54 -04:00
Zbigniew Jędrzejewski-Szmek
0a07667d8d man: provide html links to a bunch of external man pages 2016-08-06 16:39:53 -04:00
Torstein Husebø
61233823aa treewide: fix typos and remove accidental repetition of words 2016-07-11 16:18:43 +02:00
Zbigniew Jędrzejewski-Szmek
45f0c64e5f man/offline-updates: more links and support for multiple upgrade services
Most of the changes are already implemented in dnf-system-upgrade.service
and packagekit-offline-update.service, so this update mostly changes the
documentation to match status quo.
2016-04-02 19:20:39 -04:00
Zbigniew Jędrzejewski-Szmek
c5915c636a man: import "Implementing Offline System Updates"
This imports most of http://www.freedesktop.org/wiki/Software/systemd/SystemUpdates/
to turn it into a man page. Similarly for the man page about generators,
this will make it easier to keep up-to-date, keep a history of changes,
and make it more discoverable for end-users.
2016-03-15 22:02:03 -04:00