mount.py no rmdir when state=='absent'

changelogs/fragments/569_keep_mountpoint.yml

@@ -0,0 +1,3 @@
+---
+minor_changes:
+- keep_mountpoint - added keep_mountpoint option with default value false. If set to true keep_mountpoint changes the behaviour of state\: absent by keeping the mountpoint.

plugins/modules/mount.py

@@ -87,7 +87,8 @@
         real source. V(absent) does not unmount recursively, and the module will
         fail if multiple devices are mounted on the same mount point. Using
         V(absent) with a mount point that is not registered in the I(fstab) has
-        no effect, use V(unmounted) instead.
+        no effect, use V(unmounted) instead. You can set O(keep_mountpoint) to
+        True to keep the mountpoint.
       - V(remounted) specifies that the device will be remounted for when you
         want to force a refresh on the mount itself (added in 2.9). This will
         always return RV(ignore:changed=true). If O(opts) is set, the options will be
@@ -132,6 +133,16 @@
         the original file back if you somehow clobbered it incorrectly.
     type: bool
     default: false
+  keep_mountpoint:
+    description:
+    - Change the default behaviour of state=absent by keeping the mountpoint
+    - With keep_mountpoint=true, state=absent is like unmounted plus the
+      fstab update.
+    - Use it if you care about finding original mountpoint content without failing
+      and want to remove the entry in fstab. If you have no entry to clean in
+      fstab you can use state=unmounted
+    type: bool
+    default: false
 notes:
   - As of Ansible 2.3, the O(name) option has been changed to O(path) as
     default, but O(name) still works as well.
@@ -175,6 +186,23 @@
     path: /tmp/mnt-pnt
     state: remounted
 
+# The following will fail on first run
+# if /home/mydir is not empty after unmounting,
+# though unmount and remove from fstab are successfull.
+# It will be successfull on subsequent runs (already unmounted).
+- name: Unmount and remove from fstab, then if unmount was necessary try to remove mountpoint /home/mydir
+  ansible.posix.mount:
+    path: /home/mydir
+    state: absent
+# The following will not fail on first run
+# if /home/mydir is not empty after unmounting.
+# It will leave /home/mydir and its content (if any) after unmounting.
+- name: Unmount and remove from fstab, but keep /home/mydir
+  ansible.posix.mount:
+    path: /home/mydir
+    state: absent
+    keep_mountpoint: true
+
 # The following will not save changes to fstab, and only be temporary until
 # a reboot, or until calling "state: unmounted" followed by "state: mounted"
 # on the same "path"
@@ -779,6 +807,7 @@ def main():
             src=dict(type='path'),
             backup=dict(type='bool', default=False),
             state=dict(type='str', required=True, choices=['absent', 'absent_from_fstab', 'mounted', 'present', 'unmounted', 'remounted', 'ephemeral']),
+            keep_mountpoint=dict(type='bool', default=False),
         ),
         supports_check_mode=True,
         required_if=(
@@ -899,7 +928,7 @@ def main():
                     module.fail_json(
                         msg="Error unmounting %s: %s" % (name, msg))
 
-            if os.path.exists(name):
+            if os.path.exists(name) and module.params['keep_mountpoint'] is False:
                 try:
                     os.rmdir(name)
                 except (OSError, IOError) as e:

tests/integration/targets/mount/tasks/main.yml

@@ -789,3 +789,85 @@
       loop:
         - /tmp/myfs.img
         - /tmp/myfs
+
+- name: Block to test keep_mountpoint option
+  block:
+  - name: Create the mount point
+    ansible.builtin.file:
+      state: directory
+      path: '/tmp/myfs'
+      mode: '0755'
+
+  - name: Create empty file for FS aaa
+    community.general.filesize:
+      path: /tmp/myfs.img
+      size: 20M
+
+  - name: Format FS bbb
+    community.general.filesystem:
+      fstype: xfs
+      dev: /tmp/myfs.img
+
+  - name: Put data in the mount point before mounting
+    ansible.builtin.copy:
+      content: 'Testing
+        This is the data before mounting
+        '
+      dest: '/tmp/myfs/test_file'
+      mode: '0644'
+    register: file_before_info
+
+  - name: Mount with fstab
+    ansible.posix.mount:
+      path: '/tmp/myfs'
+      fstype: xfs
+      state: mounted
+      src: '/tmp/myfs.img'
+
+  - name: Check data disappears - stat data
+    ansible.builtin.stat:
+      path: '/tmp/myfs/test_file'
+    register: file_stat_after_mount
+  - name: Check data disappears - file does not exist
+    ansible.builtin.assert:
+      that:
+      - file_stat_after_mount['stat']['exists'] == false
+  - name: Put data in the mount point after mounting
+    ansible.builtin.copy:
+      content: 'Testing
+        This is the data updated after mounting
+        '
+      dest: '/tmp/myfs/test_file'
+      mode: '0644'
+    register: file_after_info
+  - name: Umount with keep_mountpoint
+    ansible.posix.mount:
+      path: '/tmp/myfs'
+      fstype: xfs
+      state: absent
+      keep_mountpoint: true
+  - name: Check original data reappears - stat data
+    ansible.builtin.stat:
+      path: '/tmp/myfs/test_file'
+    register: file_stat_after_umount
+  - name: Check original data reappears - compare checksums
+    ansible.builtin.assert:
+      that:
+      - file_stat_after_umount['stat']['checksum'] == file_before_info['checksum']
+  always:
+    - name: Remove the first test file
+      ansible.builtin.file:
+        path: /tmp/myfs/test_file
+        state: absent
+    - name: Unmount FS
+      ansible.posix.mount:
+        path: /tmp/myfs
+        state: absent
+    - name: Remove the test FS and the second test file
+      ansible.builtin.file:
+        path: '{{ item }}'
+        state: absent
+      loop:
+        - /tmp/myfs/test_file
+        - /tmp/myfs.img
+        - /tmp/myfs