Managing a self-hosted Docker registry for multiple on-premise customers while ensuring security and ease of management can be a complex task. To achieve this, you can consider the following best practices:
Use an HTTP Proxy with Authentication:
Set up an HTTP proxy in front of your Docker registry (e.g., Nginx, Apache) that enforces HTTP authentication. This proxy acts as a security barrier, ensuring that only authorized users can access the Docker images.
Individual Customer Logins:
Provide each customer with unique login credentials (username and password) to access the HTTP proxy. This ensures that customers can only access the Docker registry if they have valid credentials.
Role-Based Access Control (RBAC):
Implement role-based access control within the proxy. Assign different access levels or permissions to customers based on their requirements. For example, some customers may have read-only access, while others may have read and write privileges.
Isolate Customer Repositories:
Organize your Docker registry to isolate customer repositories. This can be achieved by creating separate namespaces or repositories for each customer. This isolation ensures that customers cannot accidentally access or modify each other’s images.
Monitoring and Auditing:
Implement monitoring and auditing tools to track registry usage and user activity. This allows you to detect any unauthorized access or suspicious activities promptly.
When a customer terminates their contract, promptly revoke their access credentials in the HTTP proxy. Additionally, consider archiving or deleting their Docker images to free up storage space, depending on your data retention policies.
Backup and Disaster Recovery:
Regularly back up your Docker registry and maintain a disaster recovery plan. This ensures that customer data is protected and can be restored in case of unforeseen events.
Implement encryption for data in transit and at rest to enhance the security of your Docker registry. TLS/SSL certificates should be used for securing communication between clients and the registry.
Consider using more robust authentication mechanisms, such as token-based authentication, if your Docker registry software supports it. This can provide an additional layer of security and flexibility.
Documentation and Training:
Provide clear documentation and training for your customers on how to interact with the Docker registry and use the provided login credentials. Educated users are less likely to make security mistakes.