Configure trust self generated CA certificate of docker registry

When self generated CA certificate has not been trusted by docker client, following error occurres

... x509: certificate signed by unknown authority

Install CA certificate for docker only

Docker can install registry CA as /etc/docker/certs.d/<registry[:port]>/ca.crt. For example,

/etc/docker/certs.d/my-registry.example.com:5000/ca.crt

Note: If port is 443, it should be omitted. Otherwise, it won't work.

To install self generated CA certificate for operating system, follow the page below.

The restart docker service after CA certificate installed.

systemctl restart docker