Trigger builds

In the previous lab we created a container Image using the blue repo in Gitea. In this lab we'll create a container image using the green repo and trigger the build based on a webhook event.

Create a Container Image with create webhook listener enabled

1. In the left menu, navigate to Container Images.

2. Click the Create Container Image button.

3. Select Docker as the build task.

4. Select the green repository from the Repository drop-down list.

5. Select the Reference (branch or tag). The green repo only has one branch (main).

6. Select Create webhook listener.

7. Click Create Container Image. A Tekton event listener is created within the App Platform and a webhook is configured for the green repo. Because the build task has not been triggered yet, the status of the container image will show a status waiting for first event.

Trigger the build

You can now trigger the build pipeline by adding a commit in the green repo, or by testing the delivery of the webhook. Let's test the delivery of the webhook:

1. In Gitea, go to the Settings (top right) of the green repo and then navigate to Webhooks.

2. Click on the webhook that has been created.

3. In the bottom, click on Test Delivery.

Check the status of the build

The build should now have started. Based on the webhook, Tekton has now created a PipelineRun. Let's check the status of the PipelineRun:

1. In the Console, click on Container Images. Because the build for the green-main image was triggered, a PipelineRun is now running and the status of the Container Image will now show in progress. When the build task has completed, the status will show ready.

2. In the list of Container Images, click on the PipelineRun link of the green build.

3. Tekton Dashboard will open and show a list of all the PipelineRuns. It will show all PipelineRuns because when starting the pipeline based on a trigger event, the Tekton PipelineRun resource is created based on a template and the Console will not know the exact name of the PipelineRun because the name is automatically generated.

4. Click on the PipelineRun with the name docker-trigger-build-green-main-*.

5. You can now see the the full log of the build task.