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    Connecting to a Cluster

    Terakhir diperbarui:2024-12-17 17:41:52
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      This document describes how to connect a local Client to an TKE Serverless cluster through kubectl, which is the Kubernetes command-line tool.

      Prerequisites

      Install cURL software program.
      Select an appropriate way to obtain kubectl based on the OS type:
      Note:
      Replace "v1.18.4" in the command line with the kubectl version required by your business based on actual needs. Generally, the version of kubectl on the Client should be consistent with the latest version of Kubernetes on service end. You can view the K8s version on the Basic Information section of the Basic Information page.
      Mac OS
      Linux
      Windows
      Run the following command to obtain kubectl:
      curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.18.4/bin/darwin/amd64/kubectl
      Run the following command to obtain kubectl:
      curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.18.4/bin/linux/amd64/kubectl
      Run the following command to obtain kubectl:
      curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.18.4/bin/windows/amd64/kubectl.exe

      Directions

      Installing kubectl

      1. Install kubectl as instructed in Installing and Setting up kubectl.
      Note:
      If you have already installed kubectl, skip this step.
      This step uses the Linux OS as an example.
      2. Run the following command to grant permissions to use kubectl.
      chmod +x ./kubectl
      sudo mv ./kubectl /usr/local/bin/kubectl
      3. Run the following command to verify the whether the installation is successful.
      kubectl version
      If the output is similar to the following version information, the installation was successful.
      Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.2", GitCommit:"08e099554f3c31f6e6f07b448ab3ed78d0520507", GitTreeState:"clean", BuildDate:"2017-01-12T04:57:25Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}

      Configuring kubeconfig

      1. Log in to the TKE console and select Cluster in the left sidebar.
      2. On the Cluster list page, click the ID of the target cluster that you want to connect to go to the management page of the Serverless cluster.
      3. Click Basic Information in the left sidebar to go to the Basic Information page, as shown in the following figure.
      4. In Cluster APIServer information section, enable the Internet Access or Private Network Access, and view information such as the access address, and kubeconfig access credential of the cluster.
      Access entry: configure the access entry as needed.
      Internet Access: this option is disabled by default. Note that enabling public network access will expose the APIServer of the cluster to the public network. In addition, you need to configure source authorization. By default, access from all sources is rejected. You can allow access from a single IP address or CIDR block. It is strongly recommended that you not open the cluster to all sources by configuring 0.0.0.0/0.
      Private Network Access: this option is disabled by default. To enable it, you need to specify the subnet of the APIServer for private network access. IP addresses are assigned from the configured subnet after private network access is successfully enabled.
      Accessed URL: APIServer address of the cluster. Note that this address cannot be copied and pasted to a browser for access.
      Kubeconfig: access credential of the cluster, which can be copied and downloaded.
      5. Configure the cluster credential as needed. For more information, see Connecting to Kubernetes cluster through Kubectl in the console.

      Accessing the Kubernetes cluster

      1. After kubeconfig is completed, run the following commands in sequence to view the contexts and switch contexts to access the cluster.
      kubectl config get-contexts
      kubectl config use-context cls-3jju4zdc-context-default
      2. Run the following command to check whether the cluster can be accessed.
      kubectl get pod
      If you cannot connect to the cluster, check whether public network access or private network access is enabled, and ensure that the access client is in the specified network environment.

      Notes

      Introduction to the kubectl CLI

      Kubectl is a CLI tool for performing operations on Kubernetes clusters. This document covers the kubectl syntax, common command operations, and examples. For more information on each command (including all main commands and subcommands), see the kubectl reference document or run the kubectl help command to view help information. For more information on kubectl installation, see Installing kubectl.
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