prometheus: Use os packaged prometheus

roles/prometheus/files/prometheus.service

@@ -1,23 +0,0 @@
-[Unit]
-Description=Prometheus
-After=network-online.target
-Requires=local-fs.target
-After=local-fs.target
-
-[Service]
-Type=simple
-Environment="GOMAXPROCS={{ ansible_processor_vcpus|default(ansible_processor_count) }}"
-User=prometheus
-Group=prometheus
-UMask=007
-ExecReload=/bin/kill -HUP $MAINPID
-ExecStart=/usr/local/sbin/prometheus \
-    --config.file=/srv/prometheus/prometheus.yml \
-    --log.level=info \
-    --storage.tsdb.path=/srv/prometheus/data \
-    --storage.tsdb.retention.time=365d \
-    --web.console.libraries=/usr/local/share/prometheus/console_libraries
-Restart=always
-
-[Install]
-WantedBy=multi-user.target

roles/prometheus/meta/main.yml

@@ -1,3 +1,4 @@
 ---
 dependencies:
+  - {role: epel_repo}
   - {role: nginx}

roles/prometheus/tasks/main.yml

@@ -14,43 +14,18 @@
     shell: /sbin/nologin
     uid: 305
 
-- name: Extract package
-  ansible.builtin.unarchive:
-    src: >-
-      {{
-        "https://github.com/prometheus/prometheus/releases/download/v" +
-          prometheus_version + "/prometheus-" + prometheus_version +
-          ".linux-amd64.tar.gz"
-      }}
-    dest: /usr/local/src
-    owner: root
-    group: "{{ ansible_wheel }}"
-    remote_src: true
+- name: Install packages
+  ansible.builtin.package:
+    name: golang-github-prometheus
+    state: installed
 
-- name: Copy binaries
-  ansible.builtin.copy:
-    dest: "/usr/local/sbin/{{ item }}"
-    src: >-
-      /usr/local/src/prometheus-{{ prometheus_version }}.linux-amd64/{{ item }}
-    mode: "0755"
-    owner: root
-    group: "{{ ansible_wheel }}"
-    remote_src: true
-  notify: Restart prometheus
-  with_items:
-    - promtool
-    - prometheus
-
-- name: Create data directories
+- name: Create data directory
   ansible.builtin.file:
-    path: "{{ item }}"
+    path: /export/prometheus
     state: directory
-    mode: "0750"
+    mode: "0770"
     owner: root
     group: prometheus
-  with_items:
-    - /export/prometheus
-    - /export/prometheus/node.d
 
 - name: Link data directory
   ansible.builtin.file:
@@ -61,26 +36,38 @@
     group: "{{ ansible_wheel }}"
     follow: false
 
-- name: Create database directory
-  ansible.builtin.file:
-    path: /srv/prometheus/data
-    state: directory
-    mode: "0770"
-    owner: root
-    group: prometheus
+- name: Configure startup options
+  ansible.builtin.lineinfile:
+    path: /etc/default/prometheus
+    regexp: "^ARGS="
+    line: >-
+      ARGS="--config.file=/etc/prometheus/prometheus.yml
+      --log.level=info
+      --storage.tsdb.path=/srv/prometheus
+      --storage.tsdb.retention.time=365d
+      --web.console.libraries=/usr/local/share/prometheus/console_libraries"
+  notify: Restart prometheus
 
 - name: Create configuration
   ansible.builtin.template:
-    dest: /srv/prometheus/prometheus.yml
+    dest: /etc/prometheus/prometheus.yml
     src: prometheus.yml.j2
     mode: "0640"
     owner: root
     group: prometheus
   notify: Restart prometheus
 
+- name: Create host config directory
+  ansible.builtin.file:
+    path: /etc/prometheus/node.d
+    state: directory
+    mode: "0750"
+    owner: root
+    group: prometheus
+
 - name: Create host configs
   ansible.builtin.template:
-    dest: "/srv/prometheus/node.d/{{ item }}.json"
+    dest: "/etc/prometheus/node.d/{{ item }}.json"
     src: node.json.j2
     mode: "0640"
     owner: root
@@ -88,15 +75,6 @@
   notify: Restart prometheus
   with_items: "{{ groups['all'] }}"
 
-- name: Create service file
-  ansible.builtin.copy:
-    dest: /etc/systemd/system/prometheus.service
-    src: prometheus.service
-    mode: "0644"
-    owner: root
-    group: "{{ ansible_wheel }}"
-  notify: Restart prometheus
-
 - name: Enable service
   ansible.builtin.service:
     name: prometheus

roles/prometheus/templates/prometheus.yml.j2

@@ -13,4 +13,4 @@ scrape_configs:
       cert_file: "{{ tls_certs }}/{{ inventory_hostname }}.crt"
     file_sd_configs:
       - files:
-        - /srv/prometheus/node.d/*.json
+        - /etc/prometheus/node.d/*.json