fix(kopia): update the bound home path from %h to ansible variable

update note:
- hotfix
- backups haven't run since commit '9f236b6fa5'
- the root service unit's %h always indicates root's home path
- backup service is verified

ansible/roles/app/tasks/node/set_raid.yaml

@@ -68,3 +68,23 @@
     group: "svadmins"
     mode: "0770"
   become: true
+
+- name: Deploy btrfs scrub service and timer
+  ansible.builtin.template:
+    src: "{{ hostvars['console']['node']['config_path'] }}/services/systemd/app/btrfs/{{ item }}.j2"
+    dest: "/etc/systemd/system/{{ item }}"
+    owner: "root"
+    group: "root"
+    mode: "0644"
+  loop:
+    - "btrfs-scrub.service"
+    - "btrfs-scrub.timer"
+  become: true
+
+- name: Enable auto btrfs scrub
+  ansible.builtin.systemd:
+    name: "btrfs-scrub.timer"
+    state: "started"
+    enabled: true
+    daemon_reload: true
+  become: true

config/services/systemd/app/btrfs/btrfs-scrub.service.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=BTRFS auto scrub
+ConditionPathIsMountPoint={{ storage['btrfs']['mount_point'] }}
+RequiresMountsFor={{ storage['btrfs']['mount_point'] }}
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/btrfs scrub start -Bd {{ storage['btrfs']['mount_point'] }}
+Nice=19
+IOSchedulingClass=idle

config/services/systemd/app/btrfs/btrfs-scrub.timer.j2

@@ -0,0 +1,10 @@
+[Unit]
+Description=Monthly BTRFS auto scrub 
+
+[Timer]
+OnCalendar=*-*-01 04:00:00
+Persistent=true
+RandomizedDelaySec=300
+
+[Install]
+WantedBy=timers.target

config/services/systemd/common/kopia/kopia-backup.service.j2

@@ -21,9 +21,9 @@ ProtectHome=tmpfs
 InaccessiblePaths=/boot /root
 
 {% if node['name'] == 'infra' %}
-BindReadOnlyPaths=%h/containers/postgresql/backups
+BindReadOnlyPaths={{ node['home_path'] }}/containers/postgresql/backups
 {% elif node['name'] == 'app' %}
-BindReadOnlyPaths=%h/data
+BindReadOnlyPaths={{ node['home_path'] }}/data
 {% endif %}
 # In root namescope, %u always bring 0
 BindPaths=/etc/kopia
@@ -38,10 +38,10 @@ ExecStartPre=/usr/bin/kopia repository connect server \
 
 {% if node['name'] == 'infra' %}
 ExecStart=/usr/bin/kopia snapshot create \
-    /home/infra/containers/postgresql/backups
+    {{ node['home_path'] }}/containers/postgresql/backups
 {% elif node['name'] == 'app' %}
 ExecStart=/usr/bin/kopia snapshot create \
-    /home/app/data
+    {{ node['home_path'] }}/data
 {% endif %}