MSR 3.1 Compatibility Matrix

Mirantis Secure Registry (MSR, and formerly Docker Trusted Registry) provides an enterprise grade container registry solution that can be easily integrated to provide the core of an effective secure software supply chain.

Support for MSR is defined in the Mirantis Cloud Native Platform Subscription Services agreement.

Operating system compatibility

MSR functionality is dependent on MKE, and MKE functionality is dependent on MCR. As such, MSR operating system compatibility is contingent on the operating system compatibility of the MCR versions with which your particular MKE version is compatible.

To determine MSR operating system compatibility:

  1. Access the MKE compatibility matrix and locate the version of MKE that you are running with MSR.

  2. Note the MCR versions with which that MKE version is compatible.

  3. Access the MCR compatibility matrix and locate the MCR versions that are compatible with your version of MKE to determine operating system compatibility.


Kubernetes required

Compatible MKE versions


1.24 - 1.27

3.6.x, 3.7.x


The Postgres Operator version you install must be 1.10.0 or later, as all versions up through 1.8.2 use the PodDisruptionBudget policy/v1beta1 Kubernetes API, which is no longer served as of Kubernetes 1.25. This being the case, various MSR features may not function properly if a Postgres Operator prior to 1.10.0 is installed alongside MSR on Kubernetes 1.25 or later.


MKE 3.7.x and 3.6.x provide Kubernetes versions that are compatible with MSR 3.1.x.

Kubernetes prerequisites

For use with MSR, Kubernetes requires persistent volumes that support both the ReadWriteOnce and ReadWriteMany volume access modes, or a StorageClass that can provision such volumes. Refer to the System requirements for more information.

Storage backends

MSR supports the following storage systems:

Persistent volume

  • NFS (v3 and v4)

  • Bind mount

  • Volume

Cloud storage providers

  • Amazon S3

  • Microsoft Azure

  • OpenStack Swift

  • Google Cloud Storage

  • Alibaba Cloud Object Storage Service


MSR cannot be deployed to Windows nodes.