Upgrade the configurations of a master node

This topic describes how to upgrade the configurations of a master node. Master nodes in a dedicated Kubernetes cluster are managed by users. You may need to upgrade the configurations of master nodes in a cluster when the size of the cluster grows.

1. Log on to the Container Service for Kubernetes (ACK) console.
2. In the left-side navigation pane, click Clusters.
3. On the Clusters page, click the name of a cluster or click Details in the Actions column. The details page of the cluster appears.
4. In the left-side navigation pane, click Nodes.
5. Find the three master nodes that you want to manage and click the instance ID of a master node. In this example, master-01 is selected. On the Instance Details page,

   you can view instance information such as the instance type.

   
6. In the Configuration Information section, click Change Instance Type.
   If the Change Instance Type button is dimmed, it indicates that the instance is running. Before you change the instance type, you must click Stop in the upper-right corner to stop the instance.
7. On the Instance Type page, select an instance type and click Confirm. For more information, see Select the Master node specification.
8. In the Change success message, click OK.
   Then, you are redirected to the Instances page.The instance type of master-01 is changed.
9. Select the instance and click Start. Then, master-01 is automatically added to the cluster and the state of the node changes to Running, as shown in the following figure.
   
10. Repeat Step 4 to Step 7 to upgrade configurations of the other master nodes.
    Note The master nodes in this topic are billed on a pay-as-you-go basis. For more information about how to upgrade master nodes that are charged by other billing methods, see Overview of instance upgrade and downgrade.