Releases delivered in 2020-2021

This section contains historical information on the unsupported Container Cloud releases delivered in 2020-2021. For the latest supported Container Cloud release, see Container Cloud releases.

Unsupported Container Cloud releases 2020-2021


Release date

Supported Cluster releases



Dec 07, 2021

  • Equinix Metal provider:

  • OpenStack provider:

    • Support of the community version of CentOS 7.9

    • Configuration of server metadata for machines in web UI

  • vSphere provider:

    • Initial RHEL 8.4 support TechPreview

    • Configuration of RAM and CPU for machines in web UI

  • Bare metal provider:

    • Visualization of service mapping in the bare metal IpamHost object

  • MKE support:

    • Support matrix of MKE versions for cluster attachment

    • MKE version update from 3.3.12 to 3.3.13 in the Cluster release 5.21.0 and from 3.4.5 to 3.4.6 in the Cluster release 7.4.0

  • IAM:

    • User access management through the Container Cloud API or web UI

    • Updated role naming used in Keycloak

  • LCM:

    • Switch of bare metal and StackLight Helm releases from v2 to v3

  • StackLight:

    • Network interfaces monitoring

    • Custom Prometheus recording rules

    • Syslog packet size configuration

    • Prometheus Relay configuration

  • Ceph:

    • Enhanced architecture

    • Networks validation

    • Automated Ceph OSD removal TechPreview

  • Container Cloud web UI:

    • The ‘Interface Guided Tour’ button in the Container Cloud web UI


Nov 11, 2021

Based on 2.13.0, this release introduces the Cluster release 6.20.0 that is based on 5.20.0 and supports Mirantis OpenStack for Kubernetes (MOS) 21.6.

For the list of Cluster releases 7.x and 5.x that are supported by 2.13.1 as well as for its features with addressed and known issues, refer to the parent release 2.13.0.


Oct 28, 2021

  • Configuration of multiple DHCP ranges for bare metal clusters

  • Updated RAM requirements for management and regional clusters

  • Improvements to StackLight alerting

  • Support for Telegraf 1.20.0

  • Documentation: How to renew the Container Cloud and MKE licenses


Oct 5, 2021

  • General availability of the Microsoft Azure cloud provider

  • Support for the Container Cloud deployment on top of MOS Victoria

  • TLS for all Container Cloud endpoints

  • LVM or mdadm RAID support for bare metal provisioning

  • Preparing state of a bare metal host

  • Migration of iam-proxy from Louketo Proxy to OAuth2 Proxy

  • Backup configuration for a MariaDB database on a management cluster

  • Renaming of the Container Cloud binary from kaas to container-cloud

  • MCR version update to 20.10.6

  • MKE version update to 3.4.5 for the Cluster release 7.2.0 and to 3.3.12 for Cluster releases 5.19.0, 6.19.0

  • Ceph:

    • Integration of the Ceph maintenance to the common upgrade procedure

    • Ceph RADOS Gateway tolerations

  • StackLight:

    • Short names for Kubernetes nodes in Grafana dashboards

    • Improvements to StackLight alerting

    • Logs-based metrics in StackLight

  • Documentation:

    • How to back up and restore an OpenStack or AWS-based management cluster


August 31, 2021

  • Technology Preview support for the Microsoft Azure cloud provider

  • RHEL 7.9 bootstrap node for the vSphere-based provider

  • Validation labels for the vSphere-based VM templates

  • Automatic migration of Docker data and LVP volumes to NVMe on AWS clusters

  • Switch of core Helm releases from v2 to v3

  • Bond interfaces for baremetal-based management clusters

  • Bare metal advanced configuration using web UI

  • Equinix Metal capacity labels for machines in web UI

  • Ceph:

    • Support for Ceph Octopus

    • Hyperconverged Ceph improvement

    • Ceph cluster status improvements

    • Ceph Manager modules

  • StackLight:

    • StackLight node labeling improvements

    • StackLight log level severity setting in web UI

    • Improvements to StackLight alerting

    • Salesforce feed update

  • Documentation:

    • How to manually remove a Ceph OSD from a Ceph cluster

    • How to update the Keycloak IP address on bare metal clusters


July 21, 2021

  • 7.x Cluster release series with updated versions of MCR 20.10.5, MKE 3.4.0, and Kubernetes 1.20.1

  • Support of MKE 3.3.3 - 3.3.6 and 3.4.0 for cluster attachment

  • Graceful MCR upgrade from 19.03.14 to 20.10.5

  • MKE logs gathering enhancements

  • VMware vSphere provider:

    • Initial CentOS support VMware vSphere provider

    • RHEL 7.9 support for the VMware vSphere provider

    • Removal of IAM and Keycloak IPs configuration

  • Ability to add or configure proxy on existing clusters

  • Command for creation of Keycloak users

  • Improvements to StackLight alerting

  • Log verbosity for StackLight components

  • Documentation:

    • How to move a Ceph Monitor daemon to another node

    • Manage user roles through Keycloak


June 15, 2021

  • Equinix Metal provider

  • Integration to Lens

  • New bootstrap node for additional regional clusters

  • TLS certificates for management cluster applications

  • Default Keycloak authorization in Container Cloud web UI

  • SSH keys management for mcc-user

  • vSphere resources controller

  • StackLight components upgrade

  • Ceph:

    • Multinetwork configuration

    • TLS for public endpoints

    • RBD mirroring support


May 18, 2021

  • Support for Keycloak 12.0

  • Ironic pod logs

  • LoadBalancer and ProviderInstance monitoring for cluster and machine statuses

  • Updated notification about outdated cluster version in web UI

  • StackLight improvements:

    • Notifications to Microsoft Teams

    • Notifications to ServiceNow

    • Log collection optimization

  • Ceph improvements:

    • Ceph default configuration options

    • Capability to define specifications for multiple Ceph nodes using lists

    • A number of new KaaSCephCluster configuration parameters

  • Documentation enhancements:

    • Ceph Monitors recovery

    • Silencing of StackLight alerts


April 22, 2021

  • Full support for the VMware vSphere provider

  • Universal SSH user

  • Configuration of SSH keys on existing clusters using web UI

  • Cluster and machines live statuses in web UI

  • Enabling of proxy access using web UI for vSphere, AWS, and bare metal

  • Log collection optimization in StackLight

  • Ceph enhancements:

    • Dedicated network for the Ceph distributed storage traffic

    • Ceph Multisite configuration

  • Documentation enhancements:

    • Ceph disaster recovery procedure

    • QuickStart guides


March 24, 2021

  • RHEL license activation using the activation key

  • Support for VMware vSphere Distributed Switch

  • VMware vSphere provider integration with IPAM controller

  • Proxy support for all Container Cloud providers

  • StackLight logging levels

  • StackLight remote logging to syslog

  • Hyperconverged Ceph

  • Ceph objectStorage section in KaasCephCluster

  • Ceph maintenance orchestration

  • Updated documentation on the bare metal networking


March 1, 2021

  • Support for Mirantis Kubernetes Engine 3.3.6

  • Support for Mirantis OpenStack for Kubernetes 21.1

  • Proxy support for OpenStack and VMware vSphere providers

  • NTP server configuration on regional clusters

  • Optimized ClusterRelease upgrade process

  • Dedicated network for external connection to the Kubernetes services on bare metal

  • Ceph RADOS Gateway HA

  • Ceph RADOS Gateway check box in Container Cloud web UI

  • Ceph maintenance label

  • Cerebro support for StackLight

  • Proxy support for StackLight


February 2, 2021

  • Support for the updated version of Mirantis Container Runtime 19.03.14

  • Dedicated network for Kubernetes pods traffic on bare metal clusters

  • Improvements for the feedback form in the Container Cloud web UI

  • StackLight enhancements:

    • Alert inhibition rules

    • Integration between Grafana and Kibana

    • New Telegraf alert TelegrafGatherErrors

    • Configuration of Ironic Telegraf input plugin

    • Automatically defined cluster ID


December 23, 2020

  • Support for Mirantis Kubernetes Engine 3.3.4 and Mirantis Container Runtime 19.03.13

  • Support for multiple host-specific L2 templates per a bare metal cluster

  • Additional regional cluster on VMware vSphere

  • Automated setup of a VM template for the VMware vSphere provider

  • StackLight support for VMware vSphere

  • Improvements in the Container Cloud logs collection


November 5, 2020

  • Support for VMware vSphere provider on RHEL

  • Kernel parameters management through BareMetalHostProfile

  • Support of multiple subnets per cluster

  • Optimization of the Container Cloud logs collection

  • Container Cloud API documentation for bare metal


October 19, 2020

  • Node labeling for machines

  • AWS resources discovery in the Container Cloud web UI

  • Credentials statuses for OpenStack and AWS in the Container Cloud web UI

  • StackLight improvements:

    • Grafana upgrade from version 6.6.2 to 7.1.5

    • Grafana Image Renderer pod to offload rendering of images from charts

    • Grafana home dashboard improvements

    • Splitting of the regional and management cluster function in StackLight telemetry to obtain aggregated metrics on the management cluster from regional and managed clusters

    • Amendments to the StackLight alerts


September 16, 2020


First GA release of Container Cloud with the following key features:

  • Container Cloud with Mirantis Kubernetes Engine (MKE) container clusters for the management plane

  • Support for managed Container Cloud with MKE container clusters on top of the AWS, OpenStack, and bare metal cloud providers

  • Support for attaching of the existing MKE standalone clusters

  • Ceph as a Kubernetes storage provider for the bare metal use case

  • Multi-region support for security and scalability

  • IAM integration with MKE container clusters to provide SSO

  • Logging, monitoring, and alerting tuned for MKE with data aggregation to the management cluster and telemetry sent to Mirantis

** - the Cluster release supports only attachment of existing MKE 3.3.4 clusters. For the deployment of new or attachment of existing clusters based on other supported MKE versions, the latest available Cluster releases are used.