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etcd components deployed in host mode and separated from the control plane

When deploying DCE 5.0 using the installer version 0.13.0 or later, it supports the host mode deployment of etcd, which allows for decoupling from the control plane and achieving an independent high-availability etcd.

Prerequisites

  • Prepare 3 Master nodes (also serving as Worker nodes)
  • Prepare 3 ETCD nodes
  • Prepare a bootstrap machine and complete the deployment of pre-requisite components according to the installation dependencies

Offline installation

  1. Download the full mode offline package on the bootstrap machine. You can download the latest version from the download center.

    CPU Architecture Version Download Link
    AMD64 v0.13.0 https://proxy-qiniu-download-public.daocloud.io/DaoCloud_Enterprise/dce5/offline-v0.13.0-amd64.tar
    ARM64 v0.13.0 https://proxy-qiniu-download-public.daocloud.io/DaoCloud_Enterprise/dce5/offline-v0.13.0-arm64.tar

    After downloading, extract the offline package:

    # Taking the amd64 architecture offline package as an example
tar -xvf offline-v0.13.0-amd64.tar

  2. Set up the cluster configuration file clusterConfig.yaml. You can obtain this file from the offline package offline/sample and modify it. The following example mainly describes how to deploy etcd using host mode.

    The reference configuration is as follows:

    apiVersion: provision.daocloud.io/v1alpha3
kind: ClusterConfig
metadata:
spec:
  clusterName: my-cluster
  # Configure etcd node information
  etcdNodes:
    - nodeName: "k8s-master"
      ip: 10.6.112.50      
      ansibleUser: "root"
      ansiblePass: "dangerous"
    - nodeName: "k8s-node1"
      ip: 10.6.112.51
      ansibleUser: "root"
      ansiblePass: "dangerous"
    - nodeName: "k8s-node2"
      ip: 10.6.112.52
      ansibleUser: "root"
      ansiblePass: "dangerous"
  masterNodes:
    - nodeName: poc-master1
      ip: 10.5.14.31
      ansibleUser: root
      ansiblePass: dangerous@2022
    - nodeName: poc-master2
      ip: 10.5.14.32
      ansibleUser: root
      ansiblePass: dangerous@2022
    - nodeName: poc-master3
      ip: 10.5.14.33
      ansibleUser: root
      ansiblePass: dangerous@2022
  workerNodes: []
  .....

  # Configure the deployment mode of etcd as host
  kubeanConfig: |-
    etcd_deployment_type: host

    Note

    • Configure etcdNodes.
    • Configure etcd_deployment_type: host in kubeanConfig.

  3. Configure the manifest file (optional). You can obtain this file from the offline package offline/sample and modify it as needed.

  4. Start the installation of DCE 5.0.

    ./offline/dce5-installer cluster-create -c ./offline/sample/clusterConfig.yaml -m ./offline/sample/manifest.yaml

  5. After the installation is complete, check if the cluster has deployed etcd.

    • There are no etcd-related Pods in the current cluster.

      etcd01

    • There are no etcd system services on the current cluster nodes.

      etcd02

  6. Run the command pf -ef | grep etcd to check if the apiserver is connected to the external etcd address.

    etcd03

  7. Run the command systemctl status etcd on the etcd nodes to check their running status.

    etcd04

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