External node is a hybrid cluster feature provided for hybrid cloud scenarios. It allows you to add non-Tencent Cloud servers to a TKE cluster. You provide computing resources and TKE manages cluster lifecycle.
You expect to migrate more services to a TKE public cloud cluster, but there are existing server resources in your IDC, and you want to add them to the cluster, so they can be effectively utilized during cloudification. They will be gradually phased out as your entire business is migrated to the cloud.
Your business is in an IDC, but you want the TKE public cloud to manage the cluster lifecycle, such as cluster creation, upgrade, and monitoring, and you want to enjoy the same API and user experience as the public cloud at the same time.
To help you efficiently manage nodes in a Kubernetes cluster, TKE introduced the concept of node pool, which uses a node template to manage a set of homogeneous nodes. Basic node pool features allow you to conveniently and quickly create, manage, and terminate nodes and dynamically scale nodes in or out. For more information, see Node Pool Overview.
You can log in to the TKE console and perform external node-related operations according to the following documents: