kaniko.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: kaniko
spec:
  params:
  - name: IMAGE
    description: Name (reference) of the image to build.
  - name: DOCKERFILE
    description: Path to the Dockerfile to build.
    default: ./Dockerfile
  - name: CONTEXT
    description: The build context used by Kaniko.
    default: ./
  - name: EXTRA_ARGS
    default: ""
  - name: BUILDER_IMAGE
    description: The image on which builds will run
    default: gcr.io/kaniko-project/executor:latest
  workspaces:
  - name: source
  results:
  - name: IMAGE-DIGEST
    description: Digest of the image just built.

  steps:
  - name: build-and-push
    workingDir: $(workspaces.source.path)
    image: $(params.BUILDER_IMAGE)
    # specifying DOCKER_CONFIG is required to allow kaniko to detect docker credential
    # https://github.com/tektoncd/pipeline/pull/706
    env:
    - name: DOCKER_CONFIG
      value: /tekton/home/.docker
    command:
    - /kaniko/executor
    - $(params.EXTRA_ARGS)
    - --dockerfile=$(params.DOCKERFILE)
    - --context=$(workspaces.source.path)/$(params.CONTEXT)  # The user does not need to care the workspace and the source.
    - --destination=$(params.IMAGE)
    - --oci-layout-path=$(workspaces.source.path)/$(params.CONTEXT)/image-digest
    # kaniko assumes it is running as root, which means this example fails on platforms
    # that default to run containers as random uid (like OpenShift). Adding this securityContext
    # makes it explicit that it needs to run as root.
    securityContext:
      runAsUser: 0
  - name: write-digest
    workingDir: $(workspaces.source.path)
    image: gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/imagedigestexporter:v0.11.1
    # output of imagedigestexport [{"key":"digest","value":"sha256:eed29..660","resourceRef":{"name":"myrepo/myimage"}}]
    command: ["/ko-app/imagedigestexporter"]
    args:
    - -images=[{"name":"$(params.IMAGE)","type":"image","url":"$(params.IMAGE)","digest":"","OutputImageDir":"$(workspaces.source.path)/$(params.CONTEXT)/image-digest"}]
    - -terminationMessagePath=$(params.CONTEXT)/image-digested
  - name: digest-to-results
    workingDir: $(workspaces.source.path)
    image: stedolan/jq
    script: |
      cat $(params.CONTEXT)/image-digested | jq '.[0].value' -rj | tee /tekton/results/IMAGE-DIGEST