Added role misc/overlay_mount

README.md

@@ -31,6 +31,7 @@ Following roles have been defined for making a server configuration easy:
   - **docker** installs *Docker* (from official Docker repository)
   - **handlers** contains some handlers used by other roles
   - **ip_discover** configures a server to automatically discover its ip addresses to a supported service
+  - **overlay_mount** configures an overlay mount with systemd
   - **system_user** creates a system user
 - **mysql** defines roles for handling mysql databases and users, uses *MariaDB*
   - **application** installs the main application with automatic backup

roles/misc/overlay_mount/defaults/main.yml

@@ -0,0 +1,10 @@
+---
+
+# target_directory
+
+# upper_directory
+# work_directory
+# lower_directories
+
+unit_name: "{{ target_directory | systemd_escape_mount }}"
+unit_description: "Overlay Mount for {{ taget_directory }}"

roles/misc/overlay_mount/tasks/main.yml

@@ -0,0 +1,32 @@
+---
+
+- name: Ensure directories for overlay mount exists
+  file:
+    state: directory
+    path: "{{ item }}"
+    # Do not setup directory, only create if required
+  loop: "{{ [upper_directory, work_directory] + lower_directories }}"
+
+- name: Create target directory of overlay mount
+  file:
+    state: directory
+    path: "{{ target_directory }}"
+    owner: "{{ target_owner }}"
+    group: "{{ target_group }}"
+    mode: "{{ target_mode }}"
+
+- name: Configure unit for overlay mount
+  template:
+    src: overlay.mount
+    dest: "{{ global_systemd_configuration_directory }}/{{ unit_name }}"
+    owner: root
+    group: root
+    mode: u=rw,g=r,o=r
+  register: overlay_mount_unit_result
+
+- name: Enable und restart unit for overlay mount
+  systemd:
+    state: restarted
+    name: "{{ unit_name }}"
+    enabled: yes
+  when: overlay_mount_unit_result.changed

roles/misc/overlay_mount/templates/overlay.mount

@@ -0,0 +1,11 @@
+[Unit]
+Description={{ unit_description }}
+
+[Mount]
+What=overlay
+Where={{ target_directory }}
+Type=overlay
+Options=upperdir={{ upper_directory }},workdir={{ work_directory }},lowerdir={{ lower_directories | join(':') }}
+
+[Install]
+WantedBy=multi-user.target