From b845f3fc6988d99c76169a16be85bc56875440c0 Mon Sep 17 00:00:00 2001
From: Bartosz Kupidura <bkupidura@mirantis.com>
Date: Sun, 25 Jun 2017 14:53:01 +0200
Subject: [PATCH] Support for custom add custom labels from reclass

This change will enable possibility to add custom
labels to alerts.
This can be used ex. to provite routing key for
pushkin (notification service)

If given key already exists in alert, it will NOT
be overriden.

prometheus:
  server:
    config:
      alert:
        labels_add:
          route: 'mail,skype'

Change-Id: I0b21d8a9695e8a15d0d6b80e6ddd0476682c80c2
---
 prometheus/files/alerts.yml | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/prometheus/files/alerts.yml b/prometheus/files/alerts.yml
index cef0462..e0682c7 100644
--- a/prometheus/files/alerts.yml
+++ b/prometheus/files/alerts.yml
@@ -33,13 +33,23 @@
       IF {{ alert.if }}
       {%- if alert.for is defined %}
       FOR {{ alert.for }}{%- endif %}
-      {%- if alert.labels is defined %}
+      {#- Handle labels #}
+      {%- if alert.labels is not defined %}
+        {%- do alert.update({'labels': {}}) %}
+      {%- endif %}
+      {%- for label_name, label_value in server.get('config', {}).get('alert', {}).get('labels_add', {}).iteritems() %}
+        {%- if label_name not in alert.labels %}
+          {%- do alert.labels.update({label_name: label_value}) %}
+        {%- endif %}
+      {%- endfor %}
+      {%- if alert.labels %}
       LABELS {
         {%- for name, value in alert.labels.iteritems() %}
         {{ name }} = "{{ value }}"{%- if not loop.last %},{%- endif %}
         {%- endfor %}
       }
       {%- endif %}
+      {#- Handle annotations #}
       {%- if alert.annotations is defined %}
       ANNOTATIONS {
         {%- for name, value in alert.annotations.iteritems() %}