service: Add support for template mounts

Template mounts are templated from jinja2 templates to a service name
-specific directory under /srv and bind mounted inside the container.

roles/service/tasks/mount.yaml

@@ -0,0 +1,32 @@
+---
+- name: Set container named mounts
+  ansible.builtin.set_fact:
+    _service_container_mounts: >
+      {{ _service_container_mounts +
+      [mount | combine({'source': service_name + '-' + mount.source})] }}
+  when: mount.type == 'volume'
+
+- name: Set container named mounts
+  ansible.builtin.set_fact:
+    _service_container_mounts: "{{ _service_container_mounts + [mount] }}"
+  when: mount.type == 'bind'
+
+- name: Template mounts
+  when: mount.type == 'template'
+  block:
+    - name: Set template host path
+      ansible.builtin.set_fact:
+        _service_template_host_path: "{{ _service_host_directory }}/mounts/{{ (mount.source | split('.'))[0:-1] | join('.') }}" # Strip .j2 extension
+
+    - name: Template files for template mounts
+      ansible.builtin.template:
+        src: "{{ mount.source }}"
+        dest: "{{ _service_template_host_path }}"
+        mode: "0644"
+      notify: "Restart container service {{ service_name }}"
+
+    - name: Set container template mounts
+      ansible.builtin.set_fact:
+        _service_container_mounts: >
+          {{ _service_container_mounts +
+          [{'readonly': true} | combine(mount) | combine({'type': 'bind', 'source': _service_template_host_path})] }}