Merge pull request #294 from matrix-org/jaywink/add-alertmanager-config-example

Add an example Alertmanager config

config.sample.yaml

@@ -136,3 +136,19 @@ services:
         "hook1":
           RoomID: "!someroom:id"
           MessageType: "m.text" # default is m.text
+
+  - ID: "alertmanager_service"
+    Type: "alertmanager"
+    UserID: "@alertmanager:localhost"
+    Config:
+      # This is for information purposes only. It should point to Go-NEB path as follows:
+      # `/services/hooks/<base64 encoded service ID>`
+      # Where in this case "service ID" is "alertmanager_service"
+      # Make sure your BASE_URL can be accessed by the Alertmanager instance!
+      webhook_url: "http://localhost/services/hooks/YWxlcnRtYW5hZ2VyX3NlcnZpY2UK"
+      # Each room will get the notification with the alert rendered with the given template
+      rooms:
+        "!someroomid:domain.tld":
+          text_template: "{{range .Alerts -}} [{{ .Status }}] {{index .Labels \"alertname\" }}: {{index .Annotations \"description\"}} {{ end -}}"
+          html_template: "{{range .Alerts -}}  {{ $severity := index .Labels \"severity\" }}    {{ if eq .Status \"firing\" }}      {{ if eq $severity \"critical\"}}        <font color='red'><b>[FIRING - CRITICAL]</b></font>      {{ else if eq $severity \"warning\"}}        <font color='orange'><b>[FIRING - WARNING]</b></font>      {{ else }}        <b>[FIRING - {{ $severity }}]</b>      {{ end }}    {{ else }}      <font color='green'><b>[RESOLVED]</b></font>    {{ end }}  {{ index .Labels \"alertname\"}} : {{ index .Annotations \"description\"}}   <a href=\"{{ .GeneratorUrl }}\">source</a><br/>{{end -}}"
+          msg_type: "m.text"  # Must be either `m.text` or `m.notice`