MOSK cluster components compatibility

The table below provides the insight into the versions of the components running on a MOSK cluster.

MOSK 26.1 series

MOSK cluster	26.1 (21.1.0)	26.1.1 (21.1.5) current patch
Release date	2026-03-10	2026-07-13
Mirantis Kubernetes Engine	3.7.28-mosk-1 [3]	3.7.31-mosk [3]
Kubernetes	1.30	1.30
Mirantis Container Runtime	25.0.14m3	25.0.16m1
Ubuntu	24.04	24.04
Linux Kernel [0]	6.8.0-100-generic (Noble) 5.15.0-170-generic (Jammy)	6.8.0-124-generic (Noble) 5.15.0-181-generic (Jammy)
Mirantis StackLight [1]	0.19.4	0.19.15
OpenStack [2]	Epoxy, Caracal	Epoxy, Caracal
OpenSDN	24.1	24.1
Ceph	Squid 19.2.3-18.cve	Squid 19.2.4-2.cve

[0]

The kernel version of the host operating system validated by Mirantis and confirmed to be working for the supported use cases. Usage of custom kernel versions or third-party vendor-provided kernels, such as FIPS-enabled, assume full responsibility for validating the compatibility of components in such environments.

[1]

The StackLight version is represented by the tag of the stacklight Helm chart, which includes information about all StackLight components.

[2]

The LTS duration of an OpenStack version is two years. For support timeline for different OpenStack versions, refer to OpenStack support cycle.

[3] (1,2)

This MKE release is available exclusively for MOSK. For further details, contact Mirantis support.