docker pull fails with `x509: certificate signed by unknown authority`

Issue

• If an organization is using a proxy, and when users try to pull an image, it fails with Get https://registry.access.redhat.com/v1/_ping: x509: certificate signed by unknown authority

  • docker pull registry.access.redhat.com/openshift3/logging-fluentd:v3.9.43
    Trying to pull repository registry.access.redhat.com/openshift3/logging-fluentd ...
    Get https://registry.access.redhat.com/v1/_ping: x509: certificate signed by unknown authority