add the ansible playbooks for the monitoring stack

ansible/roles/promtail/tasks/main.yml

@@ -0,0 +1,78 @@
+---
+- name: Create Promtail directories
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    owner: monitoring
+    group: monitoring
+    mode: "0755"
+  loop:
+    - /etc/promtail
+    - /var/lib/promtail
+
+- name: Check if Promtail is installed
+  ansible.builtin.stat:
+    path: /usr/local/bin/promtail
+  register: promtail_binary
+
+- name: Download Promtail
+  ansible.builtin.get_url:
+    url: "https://github.com/grafana/loki/releases/download/v{{ promtail_version }}/promtail-linux-{{ go_arch }}.zip"
+    dest: "/tmp/promtail-{{ promtail_version }}.zip"
+    mode: "0644"
+  when: not promtail_binary.stat.exists
+
+- name: Install unzip
+  ansible.builtin.apt:
+    name: unzip
+    state: present
+  when: ansible_os_family == "Debian"
+
+- name: Extract Promtail
+  ansible.builtin.unarchive:
+    src: "/tmp/promtail-{{ promtail_version }}.zip"
+    dest: /tmp
+    remote_src: true
+  when: not promtail_binary.stat.exists
+
+- name: Install Promtail binary
+  ansible.builtin.copy:
+    src: /tmp/promtail-linux-{{ go_arch }}
+    dest: /usr/local/bin/promtail
+    mode: "0755"
+    remote_src: true
+  notify: Restart promtail
+  when: not promtail_binary.stat.exists
+
+- name: Deploy Promtail configuration
+  ansible.builtin.template:
+    src: promtail.yml.j2
+    dest: /etc/promtail/promtail.yml
+    owner: monitoring
+    group: monitoring
+    mode: "0644"
+  notify: Restart promtail
+
+- name: Deploy Promtail systemd service
+  ansible.builtin.template:
+    src: promtail.service.j2
+    dest: /etc/systemd/system/promtail.service
+    mode: "0644"
+  notify:
+    - Reload systemd
+    - Restart promtail
+
+- name: Enable and start Promtail
+  ansible.builtin.systemd:
+    name: promtail
+    enabled: true
+    state: started
+    daemon_reload: true
+
+- name: Clean up downloaded files
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: absent
+  loop:
+    - "/tmp/promtail-{{ promtail_version }}.zip"
+    - "/tmp/promtail-linux-{{ go_arch }}"