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.
Removed features#
- SAML Support: MSR4 no longer supports SAML authentication and instead uses OpenID Connect (OIDC), a more modern and flexible standard that better aligns with cloud-native environments and improves security and scalability. Refer to OIDC Authentication for more information on configuring OIDC.
- Promotion Policies: Automated promotion policies are no longer included. Customers can adapt their CI/CD pipelines to achieve similar workflows.
- Swarm support: customers can use MSR4 as a single instance for Swarm environments instead of HA clusters.
| Feature | MSR2 | MSR3 | MSR4 (Harbor-Based) |
|---|---|---|---|
| Foundation | Docker Content Trust + Proprietary | Docker Content Trust + Proprietary | CNCF Harbor |
| Database | RethinkDB | RethinkDB | PostgreSQL Redis - Caching |
| Swarm | Supported | Supported | Not supported, but customers can use single instance install |
| OCI Compliance | Limited support | Limited support | Full OCI and Helm OCI support |
| User Interface | Basic | Improved | Modern and Intuitive |
| Quotas | Not available | Not available | Fully supported |
| Vulnerability Scanning | Synopsis only | Synopsis only | Trivy, Clair, Grype, or any 3rd party |
| Backup Integration | Internal | Internal | Full Velero support |
| Promotion Policies | Available | Available | Not Available |
| SAML support | Available | Available | Uses OIDC |
| Image Signing | Uses Docker Content Trust (DCT) based on Notary v1 | Uses Docker Content Trust (DCT) based on Notary v1 | Uses Cosign for image signing and verification |