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Release Notes

July 22, 2025​

Provide Kubernetes 1.31 version​

  • Kubernetes 1.31 version has been added. For detailed information about the new version, please refer to the Kubernetes release notes.
caution

  • The --keep-terminated-pod-volumes kubelet flag, which has not been used since 2017, has been removed. This flag affects how terminated Pod volumes are handled. If you use this flag in node configuration, you must remove it from bootstrap scripts and startup templates before upgrading.

  • The CephFS and Ceph RBD in-tree volume plugins have been removed. To continue using them, migration to CSI drivers is required.

New features and improvements​

  • AppArmor support has stabilized, allowing you to apply AppArmor profiles to containers using the securityContext.appArmorProfile.type field.

  • PersistentVolume status tracking has been improved to record the state transition time with the .status.lastTransitionTime field.

  • kube-proxy LoadBalancer connection draining is enabled by default, supporting graceful shutdown when load balancer connections terminate.

Feature added​

  • Node deletion feature has been added.

April 1, 2025​

Notice of kr-central-1 region termination​

  • Due to the termination of the kr-central-1 region, this service is no longer available in that region. Going forward, you can continue to use the service reliably in the kr-central-2 region.

January 10, 2025​

  • Added functionality to configure security groups for node pools.
  • Improved UI for resource-based autoscaling configuration.
  • Added trail log events for resource-based autoscaling.
  • Enhanced node recovery functionality (renamed Recovery to Recreate).
  • Improved UI for pod scheduling configuration.
  • Added cluster version 1.29 and removed support for version 1.26.

New features​

  • Added functionality to issue private API server endpoint URLs.
  • Added functionality to set labels on nodes.
  • Added functionality to configure user scripts.

August 22, 2024​

New features​

  • Added functionality to issue private API server endpoint URLs.
  • Introduced a feature to configure node labels.
  • Enabled user script configuration for nodes.

July 3, 2024​

New features and changes​

  • Introduced scheduled scaling for node pools (expand/shrink based on set times).
  • Added resource events (Cluster, Nodepool, Node) to Cloud Trail.
  • Renamed "Auto Scaling Settings" to "Resource-Based Autoscaling Settings."
  • Renamed "Node Pool Scheduling Settings" to "Pod Scheduling Settings."
  • Added a scaling tab in the node pool details for managing autoscaling policies.

May 31, 2024​

New features​

  • Added support for CPU multithreading when creating node pools with Virtual Machines.
  • Introduced support for Kubernetes v1.28.

May 9, 2024​

New features​

CNI Plugin Selection​
  • Added support for Calico and Cilium CNI plugins.
  • Users can select the desired CNI plugin during cluster creation, optimizing network configurations for their service environment.
Network Bonding for Bare Metal Server Nodes​
  • Applied network bonding by default for Bare Metal Server node pools, enhancing bandwidth and availability.
  • Configured two interfaces per node with IPs matching the selected subnet during node pool creation.

March 19, 2024​

New features​

  • Enabled support for Kubernetes v1.27 in the kr-central-2 region.

March 18, 2024​

New features​

Kubernetes Version Update​
  • Added support for Kubernetes v1.27 in the kr-central-1 region.
  • Restricted new cluster creation with Kubernetes v1.25 (existing clusters remain operational).

Kubelet Information​

  • Supported kubelet versions 1.26 and 1.27.

January 31, 2024​

New features​

Node Image Selection​
  • Allowed users to select node images during node pool creation.
  • Displayed image details in the node pool and node details tabs.
Cluster Details Update​
  • Added "Cluster Creator" information in the cluster details tab.

December 6, 2023​

Image updates​

Worker Node Image​
  • Updated to Ubuntu 20.04:
    • kernel: 5.4.0-167-generic
    • containerd: 1.7.6
GPU Worker Node Image​
  • Updated GPU driver versions:
    • nvidia driver: 535.129.03
    • cuda: 12.2
Kubelet Information​
  • Supported kubelet versions 1.25 and 1.26.

October 16, 2023​

New features​

Bare Metal Server Node Support (kr-central-2)​
  • Added support for creating node pools with Bare Metal Server nodes.
    • Maximum of 5 nodes per cluster or pool.
    • Bare Metal Server node pools do not support autoscaling.
Multi-AZ Cluster Availability Enhancements (kr-central-2)​
  • Required at least one subnet per AZ for new Multi-AZ clusters.
Cluster Endpoint Update (kr-central-1)​
  • Updated the API server endpoint for new clusters to use port 443.

August 16, 2023​

New features​

Multi-AZ Enhancements (kr-central-2)​
  • Enabled high availability by running control planes across multiple AZs for Multi-AZ clusters.
Subnet Selection​
  • Allowed multiple subnet selections during cluster and node pool creation.
Kubernetes Version Updates​
  • Added support for Kubernetes v1.25 and v1.26.
  • Deprecated new cluster creation with Kubernetes v1.23 (existing clusters remain operational).
Kubernetes Engine Launch (kr-central-2)​
  • Officially launched Kubernetes Engine in the kr-central-2 region.
    • Clusters in kr-central-2 were free until August 31, 2023. Paid plans began on September 1, 2023.
Persistent Volume Support​
  • Enabled Multi-AZ clusters to use persistent volumes with Block Storage CSI Provisioner.

July 7, 2023​

New features​

Multi-AZ Support (kr-central-2)​
  • Supported Multi-AZ node pools for high availability in the kr-central-2 region.
Application Load Balancer Support​
  • Added support for creating Application Load Balancers for Kubernetes services.
  • Enabled SSL certificate registration and management via the Certification menu.

June 16, 2023​

New features​

New Region (kr-central-2)​
  • Launched Kubernetes Engine Beta in the kr-central-2 region, initially supporting only kr-central-2-a AZ.

June 1, 2023​

New features​

Network Load Balancer (NLB) Support​
  • Defaulted Kubernetes Load Balancer services to NLB, aligned with updates in Load Balancing services.

March 20, 2023​

New features​

Persistent Volume Support​
  • Enabled Persistent Volumes using CSI Provisioner with KakaoCloud Block Storage.

October 25, 2022​

New features​

GPU Node Support​
  • Added GPU nodes as an option during node pool setup.
Node Monitoring​
  • Introduced a monitoring tab to view node and pod resource usage trends.
Persistent Volume Support​
  • Enabled Persistent Volumes with File Storage using NFS Client Provisioner.

July 12, 2022​

New features and improvements​

  • Supported cluster and node updates.
  • Introduced public IP-based API server endpoints.
  • Enhanced node recovery and naming rules.