Merge pull request #1 from exterrestris/unmount-unlisted

Optionally remove any existing mergerfs mounts that are not specified in mergerfs_mounts

README.md

@@ -46,6 +46,12 @@ mergerfs_mounts:
     options: allow_other,use_ino
 ```
 
+### `mergerfs_remove_undefined_mounts`
+
+Default: `false`
+
+Remove any existing mergerfs mounts that are not listed in `mergerfs_mounts`
+
 ### `mergerfs_github_releases_url`
 
 Default: [`https://github.com/trapexit/mergerfs/releases`](https://github.com/trapexit/mergerfs/releases)

defaults/main.yml

@@ -24,3 +24,6 @@ mergerfs_github_releases_url: https://github.com/trapexit/mergerfs/releases
 
 # Whether the role should install prerequisites for you.
 mergerfs_install_prerequisites: true
+
+# Whether mergerfs mounts not listed in `mergerfs_mounts` should be unmounted
+mergerfs_remove_undefined_mounts: false

tasks/main.yml

@@ -28,3 +28,18 @@
   loop: "{{ mergerfs_mounts }}"
   become: true
   tags: [mergerfs, mergerfs_install]
+
+- name: Unmount unlisted mergerfs filesystems
+  block:
+    - name: List existing mergerfs filesystems
+      # ansible_mounts doesn't list fuse mounts
+      ansible.builtin.command: "findmnt -t fuse.mergerfs -o TARGET -n"
+      changed_when: false
+      register: existing_mergerfs_mounts
+    - name: Unmount mergerfs filesystems
+      ansible.posix.mount:
+        path: "{{ item }}"
+        state: absent
+      loop: "{{ existing_mergerfs_mounts.stdout_lines }}"
+      when: item not in mergerfs_mounts | map(attribute='path') | list
+  when: mergerfs_remove_undefined_mounts