From 988de7fff34f79d09f470237fb935d86b4ca8e1d Mon Sep 17 00:00:00 2001
From: Robert Kaussow <mail@thegeeklab.de>
Date: Sat, 29 May 2021 22:48:56 +0200
Subject: [PATCH] feat: add custom version fact

---
 tasks/prepare.yml                                | 13 +++++++++++++
 tasks/setup.yml                                  | 10 ++++++++++
 templates/etc/ansible/facts.d/prometheus.fact.j2 |  4 ++++
 3 files changed, 27 insertions(+)
 create mode 100644 templates/etc/ansible/facts.d/prometheus.fact.j2

diff --git a/tasks/prepare.yml b/tasks/prepare.yml
index 19a2cb9..033eca5 100644
--- a/tasks/prepare.yml
+++ b/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
diff --git a/tasks/setup.yml b/tasks/setup.yml
index 3436c51..74ae8a4 100644
--- a/tasks/setup.yml
+++ b/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
diff --git a/templates/etc/ansible/facts.d/prometheus.fact.j2 b/templates/etc/ansible/facts.d/prometheus.fact.j2
new file mode 100644
index 0000000..56ebd34
--- /dev/null
+++ b/templates/etc/ansible/facts.d/prometheus.fact.j2
@@ -0,0 +1,4 @@
+{
+  "comment" : "{{ ansible_managed }}",
+  "version" : "{{ prometheus_version }}"
+}