Knative Build实现

apiVersion: build.knative.dev/v1alpha1
kind: BuildTemplate
metadata:
  name: bazel
spec:
  ...
  steps:
  - name: build-and-push
    image: gcr.io/cloud-builders/bazel
    args: ['run', '${TARGET}']

apiVersion: build.knative.dev/v1alpha1
kind: BuildTemplate
metadata:
  name: kaniko
spec:
  parameters:
  ...
  steps:
  - name: build-and-push
    image: gcr.io/kaniko-project/executor
    args:
    - --dockerfile=${DOCKERFILE}
    - --destination=${IMAGE}
    env:
    - name: DOCKER_CONFIG
      value: /builder/home/.docker

apiVersion: build.knative.dev/v1alpha1
kind: BuildTemplate
metadata:
  name: buildkit
spec:
  parameters:
  ...
  - name: BUILDKIT_DAEMON_ADDRESS
    description: The address of the BuildKit daemon (buildkitd) service
    default: "tcp://buildkitd:1234"
  steps:
  - name: build-and-push
    image: ${BUILDKIT_CLIENT_IMAGE}
    workingDir: ${DIRECTORY}
    command: ["buildctl", "--addr=${BUILDKIT_DAEMON_ADDRESS}", "build",
              "--progress=plain",
              "--frontend=dockerfile.v0",
              "--opt", "filename=${DOCKERFILE}",
              "--local", "context=.", "--local", "dockerfile=.",
              "--output", "type=image,name=${IMAGE},push=${PUSH}"]

for i, source := range sources {
	switch {
	case source.Git != nil:
		git, err := gitToContainer(source, i)
		if err != nil {
			return nil, err
		}
		initContainers = append(initContainers, *git)
	case source.GCS != nil:
		gcs, err := gcsToContainer(source, i)
		if err != nil {
			return nil, err
		}
		initContainers = append(initContainers, *gcs)
	case source.Custom != nil:
		cust, err := customToContainer(source.Custom, source.Name)
		if err != nil {
			return nil, err
		}
		// Prepend the custom container to the steps, to be augmented later with env, volume mounts, etc.
		build.Spec.Steps = append([]corev1.Container{*cust}, build.Spec.Steps...)
	}
	// webhook validation checks that only one source has subPath defined
	workspaceSubPath = source.SubPath
}

var (
	// The container used to initialize credentials before the build runs.
	credsImage = flag.String("creds-image", "override-with-creds:latest",
		"The container image for preparing our Build's credentials.")
	// The container with Git that we use to implement the Git source step.
	gitImage = flag.String("git-image", "override-with-git:latest",
		"The container image containing our Git binary.")
	// The container that just prints build successful.
	nopImage = flag.String("nop-image", "override-with-nop:latest",
		"The container image run at the end of the build to log build success")
	gcsFetcherImage = flag.String("gcs-fetcher-image", "gcr.io/cloud-builders/gcs-fetcher:latest",
		"The container image containing our GCS fetcher binary.")
)

[root@k8s-master ~]# kkb get images
NAME          AGE
creds-init    13d
gcs-fetcher   13d
git-init      13d
nop           13d