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Due to upgrade issues with the Envoy gateway and the offline installation environments, upgrading to MKE 4k 4.1.3 is not recommended. These issues will be fixed in a future release. For version 4.1.3, Mirantis only supports fresh installations.

Limitations#

It is important to be familiar with the MKE 4k limitations related to Calico OSS CNI:

  • The following kube-proxy mode configurations are not supported:
    • ipvs
    • nftables
    • userspace
  • Switching between IPTables and eBPF is not permitted following a fresh install.
  • Only clusters that use the default Kubernetes proxier iptables can be upgraded from MKE 3 to MKE 4k.