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📚 / Dockerized Supervision / Web Oriented / Notify Slack

Learn to setup your notifications

Use Case

← Consider reading first Ensure Availability

You have configured a Slack Webhook to receive notifications from your monitoring.

How To

Create a secret containing the URL of your webhook:

---
apiVersion: v1
kind: Secret
metadata:
  name: my-slack-webhook
  namespace: default
stringData:
  URL: "<your slack webhook URL>"

Then create the following Reactor resource:

---
apiVersion: kubirds.com/v1
kind: Reactor
metadata:
  name: slack-notifier
  namespace: default
spec:
  unitSelector:
    app: my-service
  triggers:
    successful: no
    failed: no
    fixed: yes
    regression: yes
  image:
    name: curlimages/curl:latest
    pullPolicy: Always
    command: >
      curl -X POST $HOST -H "Content-Type: application/json" \
           -d "{ \"text\": \"state: $UNIT_STATE\" }"      
  env:
    - name: HOST
      valueFrom:
        secretKeyRef:
          name: my-slack-webhook
          key: URL

The unitSelector property selects the units (by label) that need to trigger this reactor.

The triggers property controls when the reactor will be executed.

The image and env properties serves the same purpose as for the Unit resource.

The container environment is automatically populated with the variable UNIT_STATE (the Unit’s last exit code).

For the complete Reactor schema, see this page.

Continue reading → Plan