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This article shows you how to use kubeadm to create high-availability clusters in kubernetes. The content is concise and easy to understand, which will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

one。 Environment and version information

OS: CentOS 7.6.1810HAProxy Vervion: 1.5.18Docker Version: Docker-CE 18.09.1Kubetnetes Version: v1.15.1HAProxy: 192.168.199.200Control-plane Node (master node): node-01: 192.168.199.201 node-02: 192.168.199.202 node-03: 192.168.199.203Worker Node:node-04: 192.168.199.204 node-05: 192.168.199.205 node -06: 192.168.199.206 II. System configuration: 1. Turn off the firewall sudo systemctl stop firewalldsudo systemctl disable firewalld2. Close selinuxsetenforce 0sed-I's / ^ SELINUX = enforcing$/SELINUX=disabled/' / etc/selinux/config3. Turn off swapsudo swapoff-a

Note swap mounting, as shown below:

three。 Install docker, kubeadm, kubelet, kubectl1. Install docker-ce installation dependency package sudo yum install-y yum-utils device-mapper-persistent-data lvm2 add yum source sudo yum-config-manager-- add-repo https://download.docker.com/linux/centos/docker-ce.repo install docker-cesudo yum install-y docker-ce-18.09.1-3.el7

It is officially recommended to change cgroup driver to systemd, which is more stable. For more information, please see https://kubernetes.io/docs/setup/cri.

Mkdir / etc/dockercat

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