Pull variables out of arch_backup

Pull out user-modifiable variables from arch_backup. This should make it
easier for anyone to modify.

ansible/arch_backup/tasks/main.yml

@@ -3,25 +3,25 @@
 - name: Create backup mount directory
   file:
     state: directory
-    path: '/mnt/backup0'
+    path: "{{ mount.path }}"
   become: yes
   tags: backup
-- name: Ensure backup0 device exists in crypttab
+- name: Ensure {{ mount.path }} device exists in crypttab
   community.general.crypttab:
-    name: backup0
-    backing_device: UUID=1d7ce570-e695-47a0-9dda-5f14b5b20e21
-    password: /home/ducoterra/.lukskeys/backup0
+    name: "{{ disk.name }}"
+    backing_device: "UUID={{ disk.uuid }}"
+    password: "{{ disk.password }}"
     opts: luks
     state: present
   become: yes
   no_log: true
   tags: backup
-- name: Ensure backup0 mount exists in fstab
+- name: Ensure {{ disk.name }} mount exists in fstab
   ansible.posix.mount:
-    path: /mnt/backup0
-    src: /dev/mapper/backup0
+    path: "{{ mount.path }}"
+    src: /dev/mapper/{{ disk.name }}
     fstype: btrfs
-    opts: defaults,noatime,compress=zstd
+    opts: nofail,x-systemd.device-timeout=1,noatime,compress=zstd
     state: present
   become: yes
   tags: backup
@@ -37,23 +37,17 @@
     dest: /usr/local/scripts/btrfs_backup.sh
     owner: root
     group: root
-    mode: '0760'
+    mode: '0770'
   become: yes
   tags: backup
-- name: Ensure hourly backups of /
+- name: Ensure hourly backups of each item in backups
   ansible.builtin.cron:
-    name: "hourly backup of /"
+    name: "hourly backup of {{ item }}"
     minute: "0"
-    job: "export SOURCE_DIR=/; /usr/local/scripts/btrfs_backup.sh"
-  become: yes
-  tags: backup
-- name: Ensure hourly backups of /home
-  ansible.builtin.cron:
-    name: "hourly backup of /home"
-    minute: "0"
-    job: "export SOURCE_DIR=/home; /usr/local/scripts/btrfs_backup.sh"
+    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:
     name: cronie

ansible/arch_backup/vars/main.yml

@@ -1,2 +1,12 @@
 ---
-# vars file for arch_backup
+mount:
+  path: /mnt/backup0
+
+disk:
+  name: backup0
+  uuid: 1d7ce570-e695-47a0-9dda-5f14b5b20e21
+  password: /home/ducoterra/.lukskeys/backup0
+
+backups:
+  - /
+  - /home