Chapter 14. Setting up additional trusted certificate authorities for builds
Chapter 14. Setting up additional trusted certificate authorities for builds Use the following sections to set up additional certificate authorities (CA) to be trusted by builds when pulling images from an image registry. The procedure requires a cluster administrator to create a ConfigMap and add additional CAs as keys in the ConfigMap . The ConfigMap must be created in the openshift-config namespace. domain is the key in the ConfigMap and value is the PEM-encoded certificate. Each CA must be associated with a domain. The domain format is hostname[..port] . The ConfigMap name must be set in the image.config.openshift.io/cluster cluster scoped configuration resource's spec.additionalTrustedCA field. 14.1. 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: USD 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: USD oc patch image.config.openshift.io/cluster --patch '{"spec":{"additionalTrustedCA":{"name":"registry-cas"}}}' --type=merge 14.2. Additional resources Create a ConfigMap Secrets and ConfigMaps Configuring a custom PKI
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 oc patch image.config.openshift.io/cluster --patch '{"spec":{"additionalTrustedCA":{"name":"registry-cas"}}}' --type=merge