1.主机名配置

hostnamectl set-hostname master

2.主机IP地址配置

vim /etc/sysconfig/network-scripts/ifcfg-ens33

TYPE="Ethernet"
PROXY_METHOD="none"
BROWSER_ONLY="no"
BOOTPROTO="none"
DEFROUTE="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.10.200"
PREFIX="24"
GATEWAY="192.168.10.2"
DNS1="119.29.29.29"

3.主机名与IP地址解析

vi /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.10.200 master
192.168.10.201 worker01
192.168.10.202 worker02

4.防火墙配置

systemctl disable firewalld
systemctl stop firewalld
firewall-cmd --state

5.SELINUX配置 && 时间同步配置

sed -ri 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config

yum install ntpdate

crontab -e

0 */1 * * * /usr/sbin/ntpdate time1.aliyun.com

yum install wget

6.升级操作系统内核

# 导入elrepo gpg key

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

# 安装elrepo YUM源仓库

yum -y install https://www.elrepo.org/elrepo-release-7.0-4.el7.elrepo.noarch.rpm

#设置grub2默认引导为0

grub2-set-default 0

#重新生成grub2引导文件

grub2-mkconfig -o /boot/grub2/grub.cfg

#更新后，需要重启，使用升级的内核生效。

reboot

7.配置内核转发及网桥过滤

vi /etc/sysctl.d/k8s.conf

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0

# 加载br_netfilter模块
modprobe br_netfilter

sysctl -p /etc/sysctl.d/k8s.conf

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0

8.安装ipset及ipvsadm

#安装ipset及ipvsadm

yum -y install ipset ipvsadm

#配置ipvsadm模块加载方式
#添加需要加载的模块

cat > /etc/sysconfig/modules/ipvs.modules < 
#授权、运行、检查是否加载

chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack
 
9.关闭SWAP分区 
 vi /etc/fstab
......

# /dev/mapper/centos-swap swap                    swap    defaults        0 0

在上一行中行首添加#
 
10.Docker安装YUM源准备 
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

yum -y install docker-ce

systemctl enable --now docker

 vi /etc/docker/daemon.json
{
        "exec-opts": ["native.cgroupdriver=systemd"]
}

systemctl restart docker