kanikobuildtemplate.md

As of Knative 0.8, Knative Build has been deprecated in favor of Tekton Pipelines. This doc is kept as a reference for pre-0.8 Knative installations. Please refer to Tekton Pipelines section of the tutorial on how to do builds in Knative going forward.

Kaniko Build Template

In the previous lab and the lab before, we created a Build and invoked Kaniko directly, passing all the arguments required for Kaniko in the Build step. This works but a better approach is to utilize Build Templates

Knative comes with a number of ready to use Build Templates that you can use in your Build steps. There is a build-templates repo with all the templates.

In this lab, we will use Kaniko Build Template.

Install Kaniko BuildTemplate

First, we need to install Kaniko Build Template:

kubectl apply -f https://raw.githubusercontent.com/knative/build-templates/master/kaniko/kaniko.yaml

Check that it is installed:

kubectl get buildtemplate

NAME      AGE
kaniko    24m

Design the build

Let's create a Build now. Create a buildtemplate-kaniko-helloworld-gcr.yaml build file:

apiVersion: build.knative.dev/v1alpha1
kind: Build
metadata:
  name: buildtemplate-kaniko-helloworld-gcr
spec:
  source:
    git:
      url: https://github.com/meteatamel/knative-tutorial.git
      revision: master
    subPath: serving/helloworld/csharp
  template:
      name: kaniko
      arguments:
      - name: IMAGE
        # Replace {PROJECT_ID} with your GCP Project's ID.
        value: gcr.io/{PROJECT_ID}/helloworld:kaniko

Notice how the Build is not creating its own steps anymore but instead refers to the Kaniko template. The Docker image location is passed in via IMAGE argument.

Run and watch the build

Start the build:

kubectl apply -f buildtemplate-kaniko-helloworld-gcr.yaml

After a few minutes, check the build is succeeded:

kubectl get build

NAME                                          SUCCEEDED
buildtemplate-kaniko-helloworld-gcr   True

At this point, you should see the image pushed to GCR.

What's Next?

Buildpacks Build Template