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Version: 0.36.0

Setting Up Pipelines to Notify a Jenkins Webhook Enterprise

Using Flux's Notification Controller, a Jenkins Webhook can be invoked on Pipeline promotion events.

Configuring Jenkins​

To enable external callers to trigger a build on a job, an additional "Generic Webhook Trigger" plugin is required as Jenkins does not have this functionality built-in.

After the plugin is installed a new "Generic Webhook Trigger" job configuration option is available.

The only mandatory field is the "Token". Without this token, Jenkins will not know which build should be triggered.

an example token

Post content parameters​

To access fields from the pipeline event payload, each field has to be defined as a "Post content parameters".

extract reason from the post content

Expand to see an example Promotion Event payload
{
  "involvedObject": {
    "kind": "Pipeline",
    "namespace": "flux-system",
    "name": "podinfo-pipeline",
    "uid": "74d9e3b6-0269-4c12-9051-3ce8cfb7886f",
    "apiVersion": "pipelines.weave.works/v1alpha1",
    "resourceVersion": "373617"
  },
  "severity": "info",
  "timestamp": "2023-02-08T12:34:13Z",
  "message": "Promote pipeline flux-system/podinfo-pipeline to prod with version 6.1.5",
  "reason": "Promote",
  "reportingController": "pipeline-controller",
  "reportingInstance": "chart-pipeline-controller-8549867565-7822g"
}

Configure Notification Provider​

In order to be able to invoke a generic webhook, a notification provider has to be defined. Jenkins expects the secret token which you configured above as a GET parameter or in the request header. The secret token can be stored in a Secret:

apiVersion: v1
kind: Secret
type: Opaque
metadata:
  name: jenkins-token
  namespace: podinfo
stringData:
  headers: |
    token: epicsecret

Now we can define a Notification Provider using this secret:

apiVersion: notification.toolkit.fluxcd.io/v1beta1
kind: Provider
metadata:
  name: jenkins-promotion
  namespace: podinfo
spec:
  type: generic
  address: https://jenkins.domain.tld/generic-webhook-trigger/invoke
  secretRef:
    name: jenkins-token

Set Up Alerts​

We can configure an Alert to use the jenkins-promotion provider. For example an Alert for the podinfo-pipeline in the flux-system namespace:

apiVersion: notification.toolkit.fluxcd.io/v1beta1
kind: Alert
metadata:
  name: podinfo-pipeline-promotion
  namespace: podinfo
spec:
  eventSeverity: info
  eventSources:
  - kind: Pipeline
    name: podinfo-pipeline
    namespace: flux-system
  providerRef:
    name: jenkins-promotion