Merge pull request #73 from corvus-migratorius/fix-prometheus

Fix Prometheus

roles/prometheus/defaults/main.yml

@@ -1,7 +1,4 @@
 ---
-prometheus_version: 3.2.1
+prometheus_version: "3.5.0"
-prometheus_dir: "/etc/prometheus"
+prometheus_config_dir: "/etc/prometheus"
-prometheus_user: prometheus
-prometheus_group: prometheus
-prometheus_config_dir: "/etc/prometheus/conf"
 prometheus_db_dir: "/var/lib/prometheus"

roles/prometheus/molecule/default/converge.yml

@@ -5,4 +5,4 @@
   roles:
     - role: genlab.common.prometheus
       prometheus_config_source_dir: prometheus
-      alertrules_source_dir: prometheus/rules
+      prometheus_alertrules_source_dir: prometheus/rules

roles/prometheus/molecule/default/verify.yml

@@ -19,8 +19,8 @@
     - name: "Check Prometheus version"
       ansible.builtin.assert:
         that: "prometheus_installed_version.stdout is regex('{{ prometheus_version }}')"
-        success_msg: "Prometheus version {{ prometheus_version }} is installed and working"
+        success_msg: "Prometheus version {{ prometheus_version }} is available and executable"
-        fail_msg: "Prometheus version {{ prometheus_version }} is not installed or not working correctly"
+        fail_msg: "Prometheus version {{ prometheus_version }} not found or not executable"
 
     # kics-scan ignore-block
     - name: "Check if Prometheus is reachable"

roles/prometheus/tasks/configure.yml

@@ -1,23 +1,23 @@
 ---
-- name: "Copy config file"
+- name: "Configure | Copy Prometheus configuration files"
   notify: "(Re)start Prometheus service"
-  ansible.builtin.copy:
-    src: "{{ item }}"
-    dest: "{{ prometheus_config_dir }}/{{ item | basename }}"
-    owner: "{{ prometheus_user }}"
-    group: "{{ prometheus_group }}"
-    mode: "0660"
   with_fileglob:
     - "{{ prometheus_config_source_dir }}/*.yml"
-
-- name: "Copy alert rules"
-  notify: "(Re)start Prometheus service"
-  when: alertrules_source_dir is defined
   ansible.builtin.copy:
     src: "{{ item }}"
     dest: "{{ prometheus_config_dir }}/{{ item | basename }}"
-    owner: "{{ prometheus_user }}"
+    owner: "prometheus"
-    group: "{{ prometheus_group }}"
+    group: "prometheus"
     mode: "0660"
+
+- name: "Configure | Copy alert rules"
+  notify: "(Re)start Prometheus service"
+  when: prometheus_alertrules_source_dir is defined
   with_fileglob:
-    - "{{ alertrules_source_dir }}/*.yml"
+    - "{{ prometheus_alertrules_source_dir }}/*.yml"
+  ansible.builtin.copy:
+    src: "{{ item }}"
+    dest: "{{ prometheus_config_dir }}/rules/{{ item | basename }}"
+    owner: "prometheus"
+    group: "prometheus"
+    mode: "0660"

roles/prometheus/tasks/install.yml

@@ -1,84 +1,69 @@
 ---
-- name: "Create Prometheus system group"
+- name: "Install | Create Prometheus system user"
-  ansible.builtin.group:
-    name: "{{ prometheus_group }}"
-    system: true
-    state: present
-
-- name: "Create Prometheus system user"
   ansible.builtin.user:
-    name: "{{ prometheus_user }}"
+    name: "prometheus"
-    group: "{{ prometheus_group }}"
     system: true
     shell: "/sbin/nologin"
     create_home: false
     state: present
 
-- name: "Install prometheus from binary"
+- name: "Install | Install the binary"
   block:
-    - name: "Check Prometheus version"
+    - name: "Install | Check Prometheus version"
       changed_when: false
       ansible.builtin.command:
         cmd: "prometheus --version"
       register: prometheus_ver
 
-    - name: "Assert version correctness"
+    - name: "Install | Assert version correctness"
       ansible.builtin.assert:
         that: "prometheus_ver.stdout is regex('{{ prometheus_version }}')"
         success_msg: "prometheus version {{ prometheus_version }} is installed and working"
         fail_msg: "prometheus version {{ prometheus_version }} is not installed or not working correctly"
 
   rescue:
-    - name: "Create prometheus directories {{ item }}"
+    - name: "Install | Create directories {{ item }}"
+      with_items:
+        - "{{ prometheus_config_dir }}"
+        - "{{ prometheus_config_dir }}/rules"
+        - "{{ prometheus_db_dir }}"
       ansible.builtin.file:
         path: "{{ item }}"
         state: directory
-        owner: "{{ prometheus_user }}"
+        owner: "prometheus"
-        group: "{{ prometheus_group }}"
+        group: "prometheus"
         mode: "0755"
-      with_items:
-        - "{{ prometheus_config_dir }}"
-        - "{{ prometheus_dir }}"
-        - "{{ prometheus_db_dir }}"
 
-    - name: "Download Prometheus binary"
+    - name: "Install | Fetch and unpack the distribution"
-      ansible.builtin.get_url:
-        url: "https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
-        dest: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
-        owner: "{{ prometheus_user }}"
-        group: "{{ prometheus_group }}"
-        mode: "0644"
-
-    - name: "Unpack Prometheus binaries"
       notify: "(Re)start Prometheus service"
       ansible.builtin.unarchive:
-        src: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
+        src: "https://github.com/prometheus/prometheus/releases/download/v{{ prometheus_version }}/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
-        dest: "{{ prometheus_dir }}"
+        dest: "/tmp"
-        creates: "{{ prometheus_dir }}/prometheus-{{ prometheus_version }}.linux-amd64"
+        creates: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64"
         remote_src: true
 
-    - name: "Cleanup downloaded file"
+    - name: "Install | Put the binaries under the PATH"
-      ansible.builtin.file:
-        path: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64.tar.gz"
-        state: absent
-
-    - name: "Move official prometheus and promtool binaries"
-      ansible.builtin.copy:
-        src: "{{ prometheus_dir }}/prometheus-{{ prometheus_version }}.linux-amd64/{{ item }}"
-        dest: "/usr/local/bin/{{ item }}"
-        mode: "0755"
-        owner: "{{ prometheus_user }}"
-        group: "{{ prometheus_group }}"
-        remote_src: true
       with_items:
         - prometheus
         - promtool
+      ansible.builtin.copy:
+        remote_src: true
+        src: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64/{{ item }}"
+        dest: "/usr/bin/{{ item }}"
+        owner: "prometheus"
+        group: "prometheus"
+        mode: "0755"
 
-- name: "Create systemd service unit"
+    - name: "Install | Clean up the downloads"
+      ansible.builtin.file:
+        path: "/tmp/prometheus-{{ prometheus_version }}.linux-amd64"
+        state: absent
+
+- name: "Install | Create a systemd service unit"
   notify: "(Re)start Prometheus service"
   ansible.builtin.template:
     src: prometheus.service.j2
     dest: /etc/systemd/system/prometheus.service
-    owner: "{{ prometheus_user }}"
+    owner: "prometheus"
-    group: "{{ prometheus_group }}"
+    group: "prometheus"
     mode: "0660"

roles/prometheus/templates/prometheus.service.j2

@@ -8,7 +8,7 @@ Documentation="https://prometheus.io/"
 User=prometheus
 Group=prometheus
 Type=simple
-ExecStart=/usr/local/bin/prometheus \
+ExecStart=/usr/bin/prometheus \
     --config.file {{ prometheus_config_dir }}/prometheus.yml \
     --storage.tsdb.path {{ prometheus_db_dir }} \
     --storage.tsdb.retention.time=30d