kubectl-apply-on-dockerhub-push.yaml

apiVersion: v1
summary: Update Kubernetes deployment image tag on Docker Hub push
description: This workflow responds when a new Docker Hub image is available by updating a Kubernetes deployment image.
homepage: https://github.com/puppetlabs/relay-workflows/tree/master/kubectl-apply-on-dockerhub-push
tags:
  - continuous delivery

triggers:
- name: dockerhub-image-pushed
  source:
    type: webhook
    image: relaysh/dockerhub-trigger-image-pushed
  binding:
    parameters:
      tag: !Data tag
      imageName: !Data name

parameters:
  tag:
    description: image tag to change
  imageName:
    description: the image's name
  deploymentName:
    description: the deployment's name
    default: busybox
  containerName:
    description: the name of the container for the deployment
    default: busybox
  namespace:
    description: the namespace where your deployment lives
    default: default

steps:
# uncomment the following if you would like to approve the set
# step manually instead of letting it runs automatically.
#
# - name: approval
#   description: Wait for approval to run kubectl command
#   type: approval
- name: kubectl-set-new-image
  description: >
    Sets a new image tag version for the deployment.
    This uses the set command in kubectl to change the image
    the deployment uses.
  image: relaysh/kubernetes-step-kubectl:latest
  # if you are using the above approval, uncomment the following line
  # dependsOn: approval
  spec:
    namespace: !Parameter namespace
    connection: !Connection { type: "kubernetes", name: "my-cluster-connection" }
    command: set
    args:
    - image
    - !Fn.concat ["deployment/", !Parameter deploymentName]
    - !Fn.concat [!Parameter containerName, "=", !Parameter imageName, ":", !Parameter tag]