This service will never run automatically, but it encapsulates the
necessary logic and configuration to run a restore of the latest
archive, and allows to hook more specific logic, such as loading
a database dump, via `postStart`.
A new option `explicitSymlinks` will set `-H` when creating an archive.
This option makes tarsnap follow any symlinks specified explicitly on
the commandline, but not any found inside the file tree.
A new option `followSymlinks` will set `-L` when creating an archive.
This option makes tarsnap follow any symlinks found anywhere in the file
tree instead of storing them as-is.
When the znapzend module was enabled for the first time with pure =
true; then the list of previous entries is empty, but xargs still tried
to execute a znapzendzetup delete command with no arguments, which made
it fail
This enables znapzend users to specify its full configuration through
NixOS options, without ever needing to use the stateful `znapzendzetup`
command.
This works by running znapzendzetup with the specified config in
ExecPre, just before the znapzend daemon is started.
There is also the `pure` option which will clear all previous znapzend setups,
making it as stateless as can get, as only the setup declared in
configuration.nix will be persisted.
* Grants enough privileges to the configured user so that it can run
mysqldump.
* Adds a nixos test.
* Use systemd timers instead of a cronjob (by @fadenb).
* Creates a new user for backups by default, instead of using mysql
user.
* Ensures that backup user has write permissions on backup location.
* Write backup to a temporary file before renaming so that a failed
backup won't overwrite the previous backup, and so that the backup
location will never contain a partial backup.
Breaking changes:
* Renamed period to calendar to reflect the change in how to
configure the backup time.
* A failed backup will no longer result in cron sending an e-mail --
users' monitoring systems must be updated.
Resolves #24728
