kustomize-manifests.yml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: kustomize-manifests
spec:
  workspaces:
    - name: source
      description: The workspace containing the manifests and kustomization.yaml
  params:
    - name: KUSTOMIZATION_PATH
      description: The path where the root kustomization.yaml can be found
    - name: APPLICATION_NAME
      description: The application or project name - e.g. microservice-api-spring-boot
    - name: TRAEFIK_DOMAIN
      description: The domain part of the Traefik IngressRoutes .spec.routes.match Host - e.g. tekton-argocd.de
    - name: BRANCH_NAME
      description: The branch name to configure to the manifests with Kustomize
      default: main
    - name: IMAGE_NAME
      description: The image name used in the deployments .spec.template.spec.containers[0].image
    - name: KUSTOMIZE_VERSION
      description: Version of https://kubectl.docs.kubernetes.io/installation/kustomize/docker/
      default: v4.5.4
  steps:
    - name: kustomize-them-all
      image: k8s.gcr.io/kustomize/kustomize:$(params.KUSTOMIZE_VERSION)
      workingDir: $(workspaces.source.path)
      script: |
        echo "--- cd into the kustomization root folder"
        cd $(params.KUSTOMIZATION_PATH)

        echo "--- Create ingressroute-patch.yml with correct spec.routes.match: Host() name for Traefik IngressRoute - see https://stackoverflow.com/a/71704024/4964553"
        cat > ./ingressroute-patch.yml <<EOF
        apiVersion: traefik.containo.us/v1alpha1
        kind: IngressRoute
        metadata:
          name: $(params.APPLICATION_NAME)-ingressroute
          namespace: default
        spec:
          entryPoints:
            - web
          routes:
            - match: Host(\`$(params.APPLICATION_NAME)-$(params.BRANCH_NAME).$(params.TRAEFIK_DOMAIN)\`)
              kind: Rule
              services:
                - name: $(params.APPLICATION_NAME)
                  port: 80

        EOF

        echo "--- Run kustomize edits"
        kustomize edit set namesuffix -- -$(params.BRANCH_NAME)
        kustomize edit set label branch:$(params.BRANCH_NAME)
        kustomize edit set image $(params.IMAGE_NAME)

        echo "--- Show output of Kustomization for better insights"
        kustomize build .

      resources: {}