Container Service for Kubernetes:Create and manage hybrid cloud node pools

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Prerequisites

Before creating a hybrid cloud node pool, ensure the following conditions are met:

• You have an ACK managed Pro cluster that meets the following criteria:

  • The virtual private cloud (VPC) where the cluster resides has established cross-cloud network connectivity.

  • The cluster version is 1.33 or later.

• The cluster contains at least one Elastic Compute Service (ECS) node to host critical ACK management components. We recommend at least three ECS nodes for high availability.

• The Terway Hybrid network plugin is installed in the cluster.

Impact assessment

To prevent unintended impact on existing workloads, nodes in a hybrid cloud node pool are created with the following default label and taint:

apiVersion: v1
kind: Node
metadata:
  labels:
    alibabacloud.com/nodepool-type: hybridcloud
...
spec:
  taints:
  - effect: NoSchedule
    key: nodepool-type
    value: "hybridcloud"
...

To schedule pods onto these hybrid nodes, add a toleration for this taint to your pod specifications. If your application deployment does not need to distinguish between cloud and on-premises nodes, remove the taint.

Create a hybrid cloud node pool

You can configure the node pool in the console, including basic and network settings. Some settings, such as availability and networking, cannot be changed after the node pool is created. Creating a node pool does not affect the operation of existing node pools or their workloads.

1. Log on to the ACK console. In the left navigation pane, click Clusters.

2. On the Clusters page, find the cluster to manage and click its name. In the left navigation pane, choose Nodes > Node Pools.

3. On the Node Pools page, next to Create Node Pool, click ... > Create Hybrid Cloud Node Pool. In the dialog box that appears, configure the hybrid node pool parameters.

   • Node Pool Name: A unique name for your node pool (for example, hybrid-nodepool-mexxSA).

   • Zone: A custom, logical zone name (for example, idc-zone-1). This name must be unique within the cluster.

   • Network Plug-in:

     • Use CNI (Terway-Hybrid): This plugin is designed for hybrid cloud node pools. It ensures network connectivity between pods running on-premises and in the cloud.

       If the Terway-Hybrid Container Network Interface (CNI) component is not installed in the cluster, install it from the Add-ons page first. See Terway Hybrid network plugin.

     • Configure CNI: If you want to use specific features of a CNI plugin, install a custom CNI plugin in the cluster.

   • Network Type:

     • underlay: Provides high performance with low network latency by eliminating Virtual Extensible Local Area Network (VXLAN) encapsulation overhead. Performance is approximately 20% higher than in Overlay mode.

     • overlay: Offers simple configuration and flexible deployment with no special requirements for the underlying network.

4. After the node pool is created, you can modify its settings on the Edit Node Pool page.

Add nodes to a hybrid cloud node pool

You can add your existing on-premises or third-party cloud servers to an ACK cluster as worker nodes for unified management.

Remove nodes from a hybrid cloud node pool

1. On the Clusters page, find the cluster to manage and click its name. In the left navigation pane, choose Nodes > Node Pools.

2. Click the target node pool name. On the details page, select the nodes you want to remove and click Batch Remove.

OS compatibility