Logrotate is a service that runs as root and moves logfiles around while
keeping ownership of these files intact. This means we can and should
severely limit the scope of what can be done during its runtime.
the build-time check is not safe (e.g. doesn't protect from bad users or nomissingok
paths missing), so add a new unit for configuration switch time check
Now the service no longer starts immediately,
check if the config we generated makes sense as soon as possible.
The check isn't perfect because logrotate --debug wants to check
users required, there are two problems:
- /etc/passwd and /etc/group are sandboxed and we don't have
visibility of system users
- the check phase runs as nixbld which cannot su to other users
and logrotate fails on this
Until these two problems can be addressed, users-related checks
are filtered out, it's still much better than no check.
The check can be disabled with services.logrotate.checkConfig
if required
(bird also has a preCheck param, to prepare the environment
before check, but we can add it if it becomes necessary)
Since this makes for very verbose builds, we only show errors:
There is no way to control log level, but logrotate hardcodes
'error:' at common log level, so we can use grep, taking care
to keep error codes
Some manual tests:
───────┬──────────────────────────────────────────
│ File: valid-config.conf
───────┼──────────────────────────────────────────
1 │ missingok
───────┴──────────────────────────────────────────
logrotate --debug ok
grep ok
───────┬──────────────────────────────────────────
│ File: postrotate-no-end.conf
───────┼──────────────────────────────────────────
1 │ missingok
2 │ /file {
3 │ postrotate
4 │ test
5 │ }
───────┴──────────────────────────────────────────
error: postrotate-no-end.conf:prerotate, postrotate or preremove without endscript
───────┬──────────────────────────────────────────
│ File: missing-file.conf
───────┼──────────────────────────────────────────
1 │ "test" { daily }
───────┴──────────────────────────────────────────
error: stat of test failed: No such file or directory
───────┬──────────────────────────────────────────
│ File: unknown-option.conf
───────┼──────────────────────────────────────────
1 │ some syntax error
───────┴──────────────────────────────────────────
logrotate --debug ok
error: unknown-option.conf:1 unknown option 'some' -- ignoring line
───────┬──────────────────────────────────────────
│ File: unknown-user.conf
───────┼──────────────────────────────────────────
1 │ su notauser notagroup
───────┴──────────────────────────────────────────
error: unknown-user.conf:1 unknown user 'notauser'
In particular note that logrotate would not error on unknown option
(it just ignores the line) but this change makes the check fail.
using freeform is the new standard way of using modules and should replace
extraConfig.
In particular, this will allow us to place a condition on mails
having pkgs.logrotate depend on mailutils brings in quite a bit of dependencies
through mailutil itself and recursive dependency to guile when most people
do not need it.
Remove mailutils dependency from the package, and conditionally add it to the
service if the user specify the mail option either at top level or in a path
Fixes#162001
logrotate.timer is enough for rotating logs. Enabling logrotate.service would
make the service start on every configuration switch, leading to tests failure when
logrotate is enabled.
Also update test to make sure the timer is active and runs the service
on date change.
