When comparing CoreOS Enterprise Registry vs Gitlab Container Registry, the Slant community recommends Gitlab Container Registry for most people. In the question“What are the best docker image private registries?” Gitlab Container Registry is ranked 1st while CoreOS Enterprise Registry is ranked 6th. The most important reason people chose Gitlab Container Registry is:
Good integration into the repository you build your docker images out of. Just activate it for your repo and you're done. Most of the time new projects/repo have it on by default.
Specs
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Pros
Pro Automated container scanning with CLAIR
Scans show any outstanding vulnerabilities in the containers each time a new version is pushed.
Pro Powerful auditing logs
CoreOS Enterprise Registry logs every Docker repo access. The name of the item, the action performed and the authorization of the user who made the action are all stored. Logs can also be exported in JSON format.
Pro Based on Quay.io
Base on the hosted private docker made by Quay.io which was actually acquired by CoreOS in August. Basically Enterprise Registry is Quay.io running behind a firewall.
Pro Has LDAP support
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network.
Pro Both self-hosted and hosted versions exist
CoreOS has given teams the option to either host CoreOS Enterprise Registry on their internal servers, or use the hosted version maintained by CoreOS themselves.
Pro Web based UI
CoreOS Enterprise Registry also features a web based UI for managing containers.
Pro Powerful team based user management
CoreOS features a powerful team based user management system, a lot like GitHub enterprise's which allows teams to be created and each user has their own level of permission. Credentials and passwords for each team member are stored safely within Docker containers. All these features allow teams to work safely and securely behind a firewall.
Pro Integration into GitLab
Good integration into the repository you build your docker images out of. Just activate it for your repo and you're done. Most of the time new projects/repo have it on by default.
Pro Free
Cons
Con Pricing may change in the future
For now, the price for Enterprise Registry is set to starting at $10/month which is rather cheap compared to the service they are offering. But CoreOS has announced that they will notify their users in advance if the price model is set to change which suggests that they may be planning to change it or at least that they are taking a trial-and-error approach to their pricing and general business plan.
Con Tight integration into GitLab
If you're not building your docker images via GitLab CI, it's kinda hard to push images to the registry.
Con Docker garbage collection
Gitlab has very poor docker garbage collection management by default. One must read a good portion of the documentation to know what to do, so that garbage collection kicks in.