buildah.yaml

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: buildah-source-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 500Mi
---
apiVersion: tekton.dev/v1beta1
kind: Pipeline
metadata:
  name: buildah-test-pipeline
spec:
  workspaces:
  - name: shared-workspace
  tasks:
  - name: fetch-repository
    taskRef:
      name: git-clone
      kind: ClusterTask
    workspaces:
    - name: output
      workspace: shared-workspace
    params:
    - name: url
      value: https://github.com/kelseyhightower/nocode
    - name: subdirectory
      value: ""
    - name: deleteExisting
      value: "true"
    - name: httpProxy
      value: http://ec2-3-138-114-137.us-east-2.compute.amazonaws.com:3128
    - name: httpsProxy
      value: http://ec2-3-138-114-137.us-east-2.compute.amazonaws.com:3128    
  - name: buildah
    taskRef:
      name: buildah
      kind: ClusterTask
    runAfter:
    - fetch-repository
    workspaces:
    - name: source
      workspace: shared-workspace
    params:
    - name: IMAGE
      value: image-registry.openshift-image-registry.svc:5000/pthangad-v1beta1/nocode:latest
    - name: TLSVERIFY
      value: "false"

Perform below steps to try out work spaces

1. oc new-project pthangad-v1beta1
2. oc apply -f https://gist.github.com/praveen4g0/4384bfb427ac8cbdf4b049887bc414b1/raw/814dcac2d63d8eb614a09faf47f84e8229a3fe3f/buildah.yaml
   use tkn cli to run pipeline
3. tkn pipeline start buildah-test-pipeline -w=name=shared-workspace,claimName=buildah-source-pvc