[Book] [OK!] GitOps Cookbook: 06. Cloud Native CI/CD: Tekton: 6.6 Deploy an Application to Kubernetes Using a Tekton Task

$ cat << 'EOF' | kubectl create -f -
apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: kubectl
spec:
  params:
    - name: SCRIPT
      description: The kubectl CLI arguments to run
      type: string
      default: "kubectl help"
  steps:
    - name: oc
      image: quay.io/openshift/origin-cli:latest
      script: |
        #!/usr/bin/env bash
        $(params.SCRIPT)
EOF

$ cat << 'EOF' | kubectl create -f -
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: task-role
rules:
  - apiGroups:
      - ""
    resources:
      - pods
      - services
      - endpoints
      - configmaps
      - secrets
    verbs:
      - "*"
  - apiGroups:
      - apps
    resources:
      - deployments
      - replicasets
    verbs:
      - "*"
  - apiGroups:
      - ""
    resources:
      - pods
    verbs:
      - get
  - apiGroups:
      - apps
    resources:
      - replicasets
    verbs:
      - get
EOF

$ cat << 'EOF' | kubectl create -f -
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: task-role-binding
roleRef:
  kind: Role
  name: task-role
  apiGroup: rbac.authorization.k8s.io
subjects:
  - kind: ServiceAccount
    name: tekton-deployer-sa
EOF

$ cat << 'EOF' | kubectl create -f -
apiVersion: tekton.dev/v1beta1
kind: TaskRun
metadata:
  name: kubectl-taskrun
spec:
  serviceAccountName: tekton-deployer-sa
  taskRef:
    name: kubectl
  params:
    - name: SCRIPT
      value: |
        kubectl create deploy tekton-greeter --image=webmakaka/tekton-greeter:latest
EOF