Kubernetes 之 二进制安装(一)搭建环境说明与前期准备
环境说明
系统:
Centos 7.5
集群:
master1 192.168.214.88
master2 192.168.214.89
master3 192.168.214.90
etcd1 192.168.214.200
etcd2 192.168.214.201
etcd3 192.168.214.202
node1 192.168.214.203
node2 192.168.214.204
node3 192.168.214.205
各节点组件
Master:二进制安装kube-apiserver,kube-scheduler,kube-config-manager(master上的三个重要组件)、kubectl(命令行工具)
说明:kube-scheduler、kube-controller-manager 和 kube-apiserver 三者的功能紧密相关; 同时只能有一个 kube-scheduler、kube-controller-manager 进程处于工作状态,如果运行多个,则需要通过选举产生一个 leader
Etcd:源码二进制安装,选举leader
Node:安装flannel,kubelet,kube-proxy,docker-ce
haproxy:配置tcp代理haroxy组件
软件版本信息
kubernetes:1.12.2
etcd:3.2.22
docker-ce:18.06
flannel:0.9.1
haproxy:1.5.18
准备工作
所有节点关闭防火墙
systemctl stop firewalld && systemctl disable firewalld
所有节点关闭selinux
sed -i "s/SELINUX=.*/SELINUX=disabled/g" /etc/selinux/config && setenforce 0
配置yum源,方便kubernetes组件安装
yum install -y epel-release vim /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
host定向,打通集群主机名通信
vim /etc/hosts master1 192.168.214.88 master1 master2 192.168.214.89 master2 etcd1 192.168.214.200 etcd1 etcd2 192.168.214.201 etcd2 etcd3 192.168.214.202 etcd3 node1 192.168.214.203 node1 node2 192.168.214.204 node2
master1生成秘钥,设置免密登录集群其他节点
ssh-keygen ssh-copy-id -i /root/.ssh/id_rsa.pub master2 ssh-copy-id -i /root/.ssh/id_rsa.pub master3 ssh-copy-id -i /root/.ssh/id_rsa.pub etcd1 ssh-copy-id -i /root/.ssh/id_rsa.pub etcd2 ssh-copy-id -i /root/.ssh/id_rsa.pub etcd3 ssh-copy-id -i /root/.ssh/id_rsa.pub node1 ssh-copy-id -i /root/.ssh/id_rsa.pub node2 ssh-copy-id -i /root/.ssh/id_rsa.pub node3 ssh-copy-id -i /root/.ssh/id_rsa.pub mastercluster
配置ntpdate时间服务器
yum install ntpdate -y systemctl enable ntpdate.service systemctl start ntpdate.service 临时同步:ntpdate time7.aliyun.com 设置任务计划crontab -e: */30 * * * * /usr/sbin/ntpdate time7.aliyun.com >/dev/null 2>&1
关闭swap,否则会导致kubelet启动失败
## 临时关闭:swapoff -a ## 永久关闭:sed -i 's/.*swap.*/#&/' /etc/fstab