From 44665bae12750a9193ff8156c1b67aa8e65c568c Mon Sep 17 00:00:00 2001
From: uumas <gitcommit@uumas.fi>
Date: Thu, 21 Dec 2023 01:18:27 +0200
Subject: [PATCH] prometheus: install alertmanager

---
 roles/prometheus/defaults/main.yml           |  4 ++++
 roles/prometheus/meta/argument_specs.yml     | 13 +++++++++++++
 roles/prometheus/tasks/main.yml              |  8 ++++++++
 roles/prometheus/templates/prometheus.yml.j2 |  4 +++-
 4 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/roles/prometheus/defaults/main.yml b/roles/prometheus/defaults/main.yml
index ef92987..3d995d1 100644
--- a/roles/prometheus/defaults/main.yml
+++ b/roles/prometheus/defaults/main.yml
@@ -5,3 +5,7 @@ prometheus_evaluation_interval: 15s
 prometheus_storage_retention: 3650d
 prometheus_install_grafana: false
 prometheus_hcloud_relabel_configs: []
+
+prometheus_install_alertmanager: true
+
+alertmanager_storage_retention: "{{ prometheus_storage_retention }}"
diff --git a/roles/prometheus/meta/argument_specs.yml b/roles/prometheus/meta/argument_specs.yml
index 2e9ea13..5e52e6d 100644
--- a/roles/prometheus/meta/argument_specs.yml
+++ b/roles/prometheus/meta/argument_specs.yml
@@ -40,11 +40,24 @@ argument_specs:
           replacement:
             type: str
             required: false
+
       prometheus_install_grafana:
         description: If true, installs grafana in the same docker network as prometheus and configures it with prometheus as data source
         type: bool
         required: false
         default: false
+      prometheus_install_alertmanager:
+        description: If true, installs alertmanager in the same docker network as prometheus and configures it
+        type: bool
+        required: false
+        default: true
+
+      alertmanager_storage_retention:
+        description: Period of time for which alertmanager data is stored for. A number followed by unit (s, m, h, d, w, y). Passed directly to alertmanager role
+        type: str
+        required: false
+        default: "{{ prometheus_storage_retention | default('3650d') }}"
+
 
       # All options after this will be passed directly to the container role
       docker_service_suffix:
diff --git a/roles/prometheus/tasks/main.yml b/roles/prometheus/tasks/main.yml
index 0b5427d..98befaf 100644
--- a/roles/prometheus/tasks/main.yml
+++ b/roles/prometheus/tasks/main.yml
@@ -23,6 +23,14 @@
       - copypath: alerting
         path: /etc/prometheus/alerting
 
+- name: Alertmanager container for prometheus
+  include_role:
+    name: alertmanager
+  vars:
+    docker_networks:
+      - name: prometheus
+  when: prometheus_install_alertmanager
+
 - name: Grafana container for prometheus
   include_role: 
     name: grafana
diff --git a/roles/prometheus/templates/prometheus.yml.j2 b/roles/prometheus/templates/prometheus.yml.j2
index 67f64dd..1e61dae 100644
--- a/roles/prometheus/templates/prometheus.yml.j2
+++ b/roles/prometheus/templates/prometheus.yml.j2
@@ -10,7 +10,9 @@ alerting:
   alertmanagers:
     - static_configs:
         - targets:
-          # - alertmanager:9093
+{% if prometheus_install_alertmanager %}
+            - alertmanager:9093
+{%- endif %}
 
 # Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
 rule_files: