UpdateDeployment.yaml

apiVersion: tekton.dev/v1beta1
kind: Task
metadata:
  name: update-deployment
spec:
  params:
    - name: deployment
      description: The name of the deployment patch the image
      type: string
    - name: IMAGE
      description: Location of image to be patched with
      type: string
  steps:
    - name: patch
      image: image-registry.openshift-image-registry.svc:5000/openshift/cli:latest
      command: ["/bin/bash", "-c"]
      args:
        - |-
          oc patch deployment $(inputs.params.deployment) --patch='{"spec":{"template":{"spec":{
            "containers":[{
              "name": "$(inputs.params.deployment)",
              "image":"$(inputs.params.IMAGE)"
            }]
          }}}}'

          # issue: https://issues.redhat.com/browse/SRVKP-2387
          # images are deployed with tag. on rebuild of the image tags are not updated, hence redeploy is not happening
          # as a workaround update a label in template, which triggers redeploy pods
          # target label: "spec.template.metadata.labels.patched_at"
          # NOTE: this workaround works only if the pod spec has imagePullPolicy: Always
          patched_at_timestamp=`date +%s`
          oc patch deployment $(inputs.params.deployment) --patch='{"spec":{"template":{"metadata":{
            "labels":{
              "patched_at": '\"$patched_at_timestamp\"'
            }
          }}}}'