Add support for release-postprocessing

Add a cloud event pipeline resource to the publish-tekton-pipelines
Task. This can be used to trigger post-processing services like
log collection and automatic post release testing.

Add a resource to the pipeline-release and to the
pipeline-release-nightly-triggers pipelines to match the Task one.

tekton/README.md

@@ -63,6 +63,26 @@ To use [`tkn`](https://github.com/tektoncd/cli) to run the `publish-tekton-pipel
        value: revision-for-vX.Y.Z-invalid-tags-boouuhhh # REPLACE with the commit you'd like to build from (not a tag, since that's not created yet)
    ```
 
+ 1. To use release post-processing services, update the
+    [`resources.yaml`](./resources.yaml) file to add a valid targetURL in the
+    cloud event `PipelineResoruce` named `post-release-trigger`:
+
+    ```yaml
+    apiVersion: tekton.dev/v1alpha1
+    kind: PipelineResource
+    metadata:
+      name: post-release-trigger
+    spec:
+      type: cloudEvent
+      params:
+        - name: targetURI
+          value: http://el-pipeline-release-post-processing.default.svc.cluster.local:8080 # This has to be changed to a valid URL
+    ```
+
+    The targetURL should point to the event listener configured in the cluster.
+    In example above is configured with the correct value for the  `dogfooding`
+    cluster.
+
 1. To run against your own infrastructure (if you are running
    [in the production cluster](https://github.com/tektoncd/plumbing#prow) the
    default account should already have these creds, this is just a bonus - plus
@@ -117,7 +137,8 @@ To use [`tkn`](https://github.com/tektoncd/cli) to run the `publish-tekton-pipel
 		--resource=builtWebhookImage=webhook-image \
 		--resource=builtDigestExporterImage=digest-exporter-image \
 		--resource=builtPullRequestInitImage=pull-request-init-image \
-                --resource=builtGcsFetcherImage=gcs-fetcher-image \
+    --resource=builtGcsFetcherImage=gcs-fetcher-image \
+    --resource=notification=post-release-trigger
 		pipeline-release
    ```
 

tekton/publish.yaml

@@ -47,6 +47,8 @@ spec:
       type: image
     - name: builtGcsFetcherImage
       type: image
+    - name: notification
+      type: cloudEvent
   steps:
 
   - name: build-push-base-images

tekton/release-pipeline-nightly.yaml

@@ -148,6 +148,8 @@ spec:
     type: image
   - name: builtGcsFetcherImage
     type: image
+  - name: notification
+    type: cloudEvent    
   tasks:
     - name: lint
       taskRef:
@@ -242,3 +244,5 @@ spec:
             resource: builtPullRequestInitImage
           - name: builtGcsFetcherImage
             resource: builtGcsFetcherImage
+          - name: notification
+            resource: notification

tekton/release-pipeline.yaml

@@ -43,6 +43,8 @@ spec:
     type: image
   - name: builtGcsFetcherImage
     type: image
+  - name: notification
+    type: cloudEvent
   tasks:
     - name: precheck
       taskRef:
@@ -139,3 +141,5 @@ spec:
             resource: builtPullRequestInitImage
           - name: builtGcsFetcherImage
             resource: builtGcsFetcherImage
+          - name: notification
+            resource: notification

tekton/resources.yaml

@@ -177,3 +177,13 @@ spec:
   params:
     - name: url
       value: vendor/github.com/googlecloudplatform/cloud-builders/gcs-fetcher/cmd/gcs-fetcher # Registry is provided via parameter, this is a hack see #569
+---
+apiVersion: tekton.dev/v1alpha1
+kind: PipelineResource
+metadata:
+  name: post-release-trigger
+spec:
+  type: cloudEvent
+  params:
+    - name: targetURI
+      value: http://post-release-trigger-sink # This has to be changed to a valid URL