Adding certificate authorities to the cluster
You can add certificate authorities (CA) to the cluster for use when pushing and pulling images with the following procedure.
Prerequisites
You must have access to the public certificates of the registry, usually a hostname/ca.crt file located in the /etc/docker/certs.d/ directory.
Procedure
Create a ConfigMap in the openshift-config namespace containing the trusted certificates for the registries that use self-signed certificates. For each CA file, ensure the key in the ConfigMap is the hostname of the registry in the hostname[..port] format:
oc create configmap registry-cas -n openshift-config \
--from-file=myregistry.corp.com..5000=/etc/docker/certs.d/myregistry.corp.com:5000/ca.crt \
--from-file=otherregistry.com=/etc/docker/certs.d/otherregistry.com/ca.crt
Update the cluster image configuration: