feat: add custom version fact

tasks/prepare.yml

@@ -1,4 +1,11 @@
 ---
+- name: Set current prometheus version
+  set_fact:
+    prometheus_current_version: "{{ (ansible_local.prometheus | default (dict(version='0.0.0')))['version'] }}"
+
+- debug:
+    msg: Current version is '{{ prometheus_current_version }}'
+
 - block:
     - name: Create group '{{ prometheus_group }}'
       group:
@@ -19,5 +26,11 @@
         state: present
       loop:
         - "{{ prometheus_packages }}"
+
+    - name: Setup local facts
+      file:
+        path: /etc/ansible/facts.d
+        state: directory
+        mode: 0755
   become: True
   become_user: root

tasks/setup.yml

@@ -35,6 +35,7 @@
       notify: __prometheus_restart
   become: True
   become_user: "{{ prometheus_user }}"
+  when: prometheus_version is version(prometheus_current_version, ">") or prometheus_current_version is version('0.0.0', "=")
 
 - block:
     - name: Copy prometheus config file
@@ -111,5 +112,14 @@
         daemon_reload: yes
         enabled: yes
         state: started
+
+    - name: Set current version to custom fact
+      template:
+        src: etc/ansible/facts.d/prometheus.fact.j2
+        dest: /etc/ansible/facts.d/prometheus.fact
+        mode: 0644
+        owner: root
+        group: root
+      when: prometheus_version is version(prometheus_current_version, ">") or prometheus_current_version is version('0.0.0', "=")
   become: True
   become_user: root

templates/etc/ansible/facts.d/prometheus.fact.j2

@@ -0,0 +1,4 @@
+{
+  "comment" : "{{ ansible_managed }}",
+  "version" : "{{ prometheus_version }}"
+}