Kubernates 环境搭建

1. 简介

  kubernates version : v1.19.0

2. 搭建过程

2.1 设置yum源

vim  /etc/yum.repos.d/kubernates.repo

[kubernate]
name=Kubernates Repository
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

2.2 基础组件安装

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernates
systemctl enable kubelet
yum -y install docker
systemctl enable docker && systemctl start docker

2.3 服务器环境设置

关闭 selinux

临时关闭命令

  setenforce 0

永久关闭

  vim /etc/selinux/config
  SELINUX=disabled

关闭防火墙

  systemctl stop firewalld

删除 swap

  swapoff -a && sysctl -w vm.swappiness=0

2.4 kubeadm 安装

获取默认配置信息

  kubeadm config print init-defaults > init.default.yaml

  networking:
      dnsDomain: cluster.local
      serviceSubnet: 10.96.0.0/12
      podSubnet: 10.244.0.0/16

修改配置

  vim   init.default.yaml
  imageRepository: registry.aliyuncs.com/google_containers

拉取所需镜像

  kubeadm config images pull --config=init.default.yaml

初始化master

  kubeadm init --config=init.default.yaml

2.5 CNI 插件安装

flannel

  kubectl apply -f http://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

3. kubeadm reset

3.1 /etc/resolv.conf

  resolv.conf 中配置的 nameserver 不能超过3个