Updates for grafana stack

roles/alloy/tasks/main.yml

@@ -0,0 +1,50 @@
+---
+# Ship host/container logs → Loki and metrics → Prometheus via Grafana Alloy
+# (Promtail successor; also collects node + cAdvisor metrics).
+
+- name: alloy | ensure project directories
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: "{{ admin_user }}"
+    group: "{{ admin_user }}"
+    mode: "0750"
+  loop:
+    - "{{ apps_base_dir }}/observability"
+    - "{{ alloy_dir }}"
+
+- name: alloy | config
+  ansible.builtin.template:
+    src: config.alloy.j2
+    dest: "{{ alloy_dir }}/config.alloy"
+    owner: "{{ admin_user }}"
+    group: "{{ admin_user }}"
+    mode: "0644"
+  register: _alloy_config
+
+- name: alloy | compose file
+  ansible.builtin.template:
+    src: docker-compose.yml.j2
+    dest: "{{ alloy_dir }}/docker-compose.yml"
+    owner: "{{ admin_user }}"
+    group: "{{ admin_user }}"
+    mode: "0644"
+  register: _alloy_compose
+
+- name: alloy | start / recreate container
+  ansible.builtin.command:
+    cmd: >-
+      docker compose up -d --remove-orphans
+      {{ '--force-recreate' if (_alloy_compose is changed or _alloy_config is changed) else '' }}
+    chdir: "{{ alloy_dir }}"
+  become: true
+  become_user: "{{ admin_user }}"
+  register: _alloy_up
+  changed_when: >-
+    _alloy_up.rc == 0 and (
+      'Started' in (_alloy_up.stdout | default(''))
+      or 'Recreated' in (_alloy_up.stdout | default(''))
+      or 'Created' in (_alloy_up.stdout | default(''))
+      or _alloy_compose is changed
+      or _alloy_config is changed
+    )