run all backup tasks in a slice

roles/any.tools.backup-scripts/defaults/main.yml

@@ -3,7 +3,7 @@
 #
 # All types:
 #   name:             (required) unique identifier, used in unit and script filenames
-#   type:             (required) backup template to use: btrfs-subvolume, podman-postgres, postgres
+#   type:             (required) backup template to use: btrfs-subvolume, podman-mysql, podman-postgres, postgres, echo-test
 #   user:             (optional) user to run the backup as; defaults to root
 #   group:            (optional) group to run the backup as; defaults to backups
 #   timer_delay_sec:  (optional) RandomizedDelaySec for the timer; defaults to 30 minutes
@@ -11,6 +11,12 @@
 # btrfs-subvolume:
 #   path:             (required) path to the btrfs subvolume to back up
 #
+# podman-mysql:
+#   container:        (required) name of the podman container running mysql/mariadb
+#   mysql_user:       (required) mysql user to connect as
+#   mysql_password:   (required) mysql password for the user
+#   database:         (required) mysql database to dump
+#
 # podman-postgres:
 #   container:        (required) name of the podman container running postgres
 #   pg_user:          (required) postgres user to connect as
@@ -20,6 +26,10 @@
 #   pwd:              (required) working directory for podman compose
 #   user:             (required) postgres user to connect as
 #   database:         (required) postgres database to dump
+#
+# echo-test:
+#   lines:            (optional) number of log lines to emit; defaults to 10
+#   interval_sec:     (optional) seconds to sleep between lines; defaults to 1
 backups: []
 
 # Restic REST server URL to publish backups to

roles/any.tools.backup-scripts/files/backup.slice

@@ -0,0 +1,5 @@
+[Unit]
+Description=Backup services slice
+
+[Slice]
+CPUQuota=25%

roles/any.tools.backup-scripts/tasks/main.yml

@@ -35,6 +35,15 @@
   loop: "{{ backups }}"
   when: item.user is defined
 
+- name: Ensure backup slice unit is present
+  ansible.builtin.copy:
+    src: "backup.slice"
+    dest: "/etc/systemd/system/backup.slice"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: Reload systemd
+
 - name: Ensure systemd service unit is present for each backup
   ansible.builtin.template:
     src: "backup.service.j2"

roles/any.tools.backup-scripts/templates/backup.service.j2

@@ -4,6 +4,7 @@ After=network.target
 
 [Service]
 Type=oneshot
+Slice=backup.slice
 User={{ item.user | default('root') }}
 Group={{ item.group | default('backups') }}
 

roles/any.tools.backup-scripts/templates/echo-test.backup.sh.j2

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+echo "log line 1"
+echo "log line 2"
+echo "log line 3"
+echo "log line 4"
+echo "log line 5"
+echo "log line 6"