Upgrading Node Group Version

Currently, our VKS system has supported you to upgrade Node Group Version, you can upgrade Node Group Version to:

• Control Plane Version (For example upgrade from 1.24 (current Node Group version) to 1.25 (current Control Plane Version), but cannot upgrade to other versions.

To perform a Node Group Version upgrade, you can follow these instructions:

Step 1: Visit https://vks.console.vngcloud.vn/overview

Step 2: At the Overview screen , select the Kubernetes Cluster menu. Select a Cluster where you want to upgrade Node Group Version .

Step 3: Select iconand select Upgrade Node Group version to upgrade the node group version.

Step 4: You can select the new version for all Node Groups. The new version needs to be valid and compatible with the current version of the cluster. Specifically: you can choose:

• Upgrade Node Group to the same version as Control Plane Version (for example: 1.24 to 1.25)

Step 5: The VKS system will upgrade all Node Groups to the Control Plane version. After the upgrade is complete, the Node Group status returns to ACTIVE .

Attention:

• Upgrading Node Group Version is optional and independent of upgrading Control Plane Version. However, all Node Groups in a Cluster will be upgraded at the same time, as well as Control Plane Version and Node Group Version in the same Cluster cannot differ by more than 1 minor version. Besides, the VKS system automatically upgrades the Node Group Version when the current K8S Version being used for your Cluster exceeds the supplier's support period.

• During the Node Group Version upgrade, you cannot perform other actions on your Node Group.

• Below are a few notes before, during and after the upgrade process, please refer to:

Before getting into work:

• Check the current version: Visit Releases for a list of supported versions. Select a new version that is valid and compatible with the current version of the cluster.

• Ensure Node Group availability: Node Group must be in active state (ACTIVE) and all nodes must be HEALTHY.

• Stop running tasks: Stop running tasks on the cluster to avoid affecting the upgrade process.

While doing:

• Monitor Node Group status: Monitor Node Group status during the upgrade process. The Node Group status will change to UPDATING and after completion will return to ACTIVE.

• Check system log: Check the system log for any errors or warnings during the upgrade process.

After implementation:

• Check Node Group Availability: Confirm that the Node Group has been upgraded successfully and all nodes are operating normally.

• Test applications: Test applications running on the cluster to ensure they work properly after the upgrade.

Note:

• Upgrading Node Group Version may take some time depending on the size and complexity of the Node Group.

• In some rare cases, upgrading Node Group Version may fail. If this happens, the VKS system will automatically rollback the cluster to the current version.