在 OCP 4 节点中手动执行 podman pull 失败

Issue

• 在 OpenShift 4 节点中使用 podman pull 拉取镜像失败：

  sh-4.4# podman pull registry.redhat.io/openshift4/ose-logging-fluentd
  Failed to pull image "registry.redhat.io/openshift4/ose-cluster-logging-operator@sha256:xxxxxxx": rpc error: code = Unknown desc = unable to retrieve auth token: invalid username/password: unauthorized: Please login to the Red Hat Registry using your Customer Portal credentials.
  

  sh-4.4# podman pull image-registry.openshift-image-registry.svc:5000/openshift4/ose-cluster-logging-operator:latest
  [...]
  Trying to pull image-registry.openshift-image-registry.svc:5000/openshift4/ose-cluster-logging-operator:latest...
  Error: Error initializing source docker://image-registry.openshift-image-registry.svc:5000/openshift4/ose-cluster-logging-operator:latest: Error reading manifest latest in image-registry.openshift-image-registry.svc:5000/openshift4/ose-cluster-logging-operator: unauthorized: authentication required
  

• 在 podman login 成功后，podman pull 失败，并显示 unauthorized 错误。