can't push to gcr

[AkihiroSuda]

Expected Behavior

can push to gcr

Actual Behavior

kaniko fails with error pushing image: failed to push to destination gcr.io/*****/*****: DENIED: "Access denied.".
Looks like the credential is not mounted on /root/.docker .

Steps to Reproduce the Problem

1. Run https://github.com/knative/build-templates/blob/fa2ac1bc3f31d6d7a367e1c783c116b1f6b94ce0/gcr_helper/helper.sh but s/build.knative.dev/tekton.dev/g
2. Apply https://github.com/tektoncd/catalog/blob/2211c49b2f2911c5b353b6d28a244532e46e28d9/kaniko/kaniko.yaml
3. Apply the following yaml

kind: TaskRun
metadata:
  name: example-run
spec:
  serviceAccount: builder
  taskRef:
    name: kaniko
  inputs:
    resources:
    - name: source
      resourceSpec:
        type: git
        params:
        - name: url
          value: https://github.com/*****/*****
  outputs:
    resources:
    - name: image
      resourceSpec:
        type: image
        params:
        - name: url
          value: gcr.io/*****/*****

Additional Info

• Running on GKE
• controller: gcr.io/tekton-releases/github.com/tektoncd/pipeline/cmd/controller@sha256:85b932024e07dc2538dece0d979fc0030211600e07ff6fb18935cd7a6b56bad6

[vincent-pli]

Seems similar with this issue:
#706

[AkihiroSuda]

thanks