In correlation with the end of life (EOL) date for MSR 4.0.x, Mirantis stopped maintaining this documentation version as of July 17, 2026. The latest MSR product documentation is available here.

What's New

Mirantis Secure Registry (MSR) marks a major evolution in our container image management solution. With a new foundation based on the CNCF Harbor project, MSR4 delivers improved performance, scalability, and flexibility for modern DevOps workflows.

This section outlines the key changes and improvements introduced in MSR4, highlights differences compared to MSR2 and MSR3, and provides guidance for a smooth transition.