Fix issues where cryptsetup would fail to unmount

There were occasions where removing the backup drive would confuse luks
and prevent re-mounting. This fixes the issue by attempting to luks
close and open the drive before mounting, thereby correcting any issues
where the drive would stick.

ansible/arch_backup/tasks/main.yml

@@ -1,11 +1,15 @@
 ---
 # Backup
-- name: Create backup mount directory
+- name: Ensure snapshot directory
+  file:
+    state: directory
+    path: "{{ snapshots.path }}"
+  become: yes
+- name: Ensure backup mount directory
   file:
     state: directory
     path: "{{ mount.path }}"
   become: yes
-  tags: backup
 - name: Ensure {{ mount.path }} device exists in crypttab
   community.general.crypttab:
     name: "{{ disk.name }}"
@@ -15,7 +19,6 @@
     state: present
   become: yes
   no_log: true
-  tags: backup
 - name: Ensure {{ disk.name }} mount exists in fstab
   ansible.posix.mount:
     path: "{{ mount.path }}"
@@ -24,29 +27,25 @@
     opts: nofail,x-systemd.device-timeout=1,noatime,compress=zstd
     state: present
   become: yes
-  tags: backup
 - name: Ensure /usr/local/scripts exists
   file:
     state: directory
     path: '/usr/local/scripts'
   become: yes
-  tags: backup
-- name: Copy btrfs_backup.sh
-  ansible.builtin.copy:
-    src: scripts/btrfs_backup.sh
+- name: Template btrfs_backup.sh
+  ansible.builtin.template:
+    src: btrfs_backup.sh.j2
     dest: /usr/local/scripts/btrfs_backup.sh
     owner: root
     group: root
-    mode: '0770'
+    mode: '0744'
   become: yes
-  tags: backup
 - name: Ensure hourly backups of each item in backups
   ansible.builtin.cron:
     name: "hourly backup of {{ item }}"
     minute: "0"
     job: "export SOURCE_DIR={{ item }}; /usr/local/scripts/btrfs_backup.sh"
   become: yes
-  tags: backup
   loop: "{{ backups }}"
 - name: Ensure cronie service started
   ansible.builtin.systemd:
@@ -55,4 +54,4 @@
     daemon_reload: yes
     enabled: yes
   become: yes
-  tags: backup
+