With the upcoming end-of-life (EOL) of MSR 3.1.x, Mirantis encourages you to upgrade to the latest supported version to ensure continued support and security updates.

Certificate issues when pushing and pulling images

If TLS is not properly configured, you are likely to encounter an x509: certificate signed by unknown authority error when attempting to run the following commands:

• docker login

• docker push

• docker pull

To resolve the issue:

Verify that your MSR instance has been configured with your TLS certificate Fully Qualified Domain Name (FQDN). For more information, refer to Add a custom TLS certificate.

Alternatively, but only in testing scenarios, you can skip using a certificate by adding your registry host name as an insecure registry in the Docker daemon.json file:

{
    "insecure-registries" : [ "registry-host-name" ]
}