nixos/services.mysql: Fix restart on-abnormal (#430859)

nixos/doc/manual/release-notes/rl-2511.section.md

@@ -196,6 +196,8 @@
 
 - The `services.postgresql` module now sets up a systemd unit `postgresql.target`. Depending on `postgresql.target` guarantees that postgres is in read-write mode and initial/ensure scripts were executed. Depending on `postgresql.service` only guarantees a read-only connection.
 
+- The `services.mysql` module now restarts the database `on-abnormal`, which means that it now will be restarted in certain situations, it wasn't before. For example an OOM-kill.
+
 - The `services.siproxd` module has been removed as `siproxd` is unmaintained and broken with libosip 5.x.
 
 - `services.tor.torsocks.enable` no longer defaults to true if Tor and Tor client functionality is enabled.

nixos/modules/services/databases/mysql.nix

@@ -691,7 +691,7 @@ in
       serviceConfig = lib.mkMerge [
         {
           Type = if hasNotify then "notify" else "simple";
-          Restart = "on-abort";
+          Restart = "on-abnormal";
           RestartSec = "5s";
 
           # User and group