From 917865ed973e65b02b531fc987381a582aff82f1 Mon Sep 17 00:00:00 2001
From: Steve Wilkerson <wilkers.steve@gmail.com>
Date: Fri, 15 Dec 2017 08:40:20 -0600
Subject: [PATCH] Add alert templates via alertmanager's values.yaml file

This adds the ability to define custom alert template via the
values.yaml file for Alertmanager. This will provide the ability
for an operator to define actions to be taken upon an alert firing
such as sending Slack alerts, email alerts, or any other
organization-specific action

Change-Id: I78a40e43cfeb7391699908a1f73b57846fedbcbb
---
 prometheus-alertmanager/templates/configmap-etc.yaml | 2 ++
 prometheus-alertmanager/templates/statefulset.yaml   | 4 ++++
 prometheus-alertmanager/values.yaml                  | 1 +
 3 files changed, 7 insertions(+)

diff --git a/prometheus-alertmanager/templates/configmap-etc.yaml b/prometheus-alertmanager/templates/configmap-etc.yaml
index 35bab917e..602a9b990 100644
--- a/prometheus-alertmanager/templates/configmap-etc.yaml
+++ b/prometheus-alertmanager/templates/configmap-etc.yaml
@@ -24,4 +24,6 @@ metadata:
 data:
   alertmanager.yml:
 {{- toYaml .Values.conf.alertmanager | indent 4 }}
+  alert-templates.tmpl:
+{{- toYaml .Values.conf.alert_templates | indent 4 }}
 {{- end }}
diff --git a/prometheus-alertmanager/templates/statefulset.yaml b/prometheus-alertmanager/templates/statefulset.yaml
index fea043160..da9ba8e09 100644
--- a/prometheus-alertmanager/templates/statefulset.yaml
+++ b/prometheus-alertmanager/templates/statefulset.yaml
@@ -72,6 +72,10 @@ spec:
           volumeMounts:
             - name: etc-alertmanager
               mountPath: /etc/config
+            - name: alertmanager-etc
+              mountPath: /etc/alertmanager/template/alert-templates.tmpl
+              subPath: alert-templates.tmpl
+              readOnly: true
             - name: alertmanager-etc
               mountPath: /etc/config/alertmanager.yml
               subPath: alertmanager.yml
diff --git a/prometheus-alertmanager/values.yaml b/prometheus-alertmanager/values.yaml
index 978d25fa8..2c503a68d 100644
--- a/prometheus-alertmanager/values.yaml
+++ b/prometheus-alertmanager/values.yaml
@@ -260,3 +260,4 @@ conf:
         room_id: 85
         message_format: html
         notify: true
+  alertmanager_templates: null