安装Centos7初始化操作系统
设置静态网络1、设置静态网络，一是用来不让地址飘忽不定，二来是为了访问外网。
命令如下：
# vim /etc/sysconfig/network-scripts/ifcfg-ens33修改内容：
TYPE="Ethernet"
BOOTPROTO="static" # 设置为静态网络static。
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
IPV6_ADDR_GEN_MODE="stable-privacy"
NAME="ens33"
UUID="66f9933b-54eb-4156-81f4-8cb3f344124b"
DEVICE="ens33"
ONBOOT="yes"
IPADDR="192.168.43.2" # 配置跟宿主机联网的同网段IP地址
NETMASK="255.255.255.0" # 配置子网掩码
GATEWAY="192.168.43.1" # 配置宿主机的网关
DNS1="8.8.8.8" # 配置DNS解析服务器 2、重启网络服务。
# systemctl restart network 3、查看IP地址是否已经更改。
# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:b2:e5:54 brd ff:ff:ff:ff:ff:ff
inet 192.168.43.2/24 brd 192.168.43.255 scope global ens33 # 可以查看这里IP地址已经更改
valid_lft forever preferred_lft forever
inet6 2409:890c:39b0:630:1427:b41a:753c:ef8d/64 scope global noprefixroute dynamic
valid_lft 3472sec preferred_lft 3472sec
inet6 fe80::e458:494f:e11c:bbe8/64 scope link
valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:cd:f3:96 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:cd:f3:96 brd ff:ff:ff:ff:ff:ff 4、验证网络是否联通。
# ping www.baidu.com
PING www.a.shifen.com (39.156.66.18) 56(84) bytes of data.
64 bytes from 39.156.66.18 (39.156.66.18): icmp_seq=1 ttl=50 time=51.6 ms
64 bytes from 39.156.66.18 (39.156.66.18): icmp_seq=2 ttl=50 time=69.3 ms
64 bytes from 39.156.66.18 (39.156.66.18): icmp_seq=3 ttl=50 time=57.5 ms 关闭防火墙
1、关闭防火墙，防止以后服务会被防火墙挡掉。
# iptables -F
# systemctl stop firewalld
# systemctl disable firewalld
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service.
# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)
Mar 16 02:52:21 localhost.localdomain systemd: Starting firewalld - dynami....
Mar 16 02:52:27 localhost.localdomain systemd: Started firewalld - dynamic....
Mar 16 03:45:13 localhost.localdomain systemd: Stopping firewalld - dynami....
Mar 16 03:45:18 localhost.localdomain systemd: Stopped firewalld - dynamic....
Hint: Some lines were ellipsized, use -l to show in full. 关闭selinux
1、临时关闭selinux。
# getenforce
Enforcing
# setenforce 0
# getenforce
Permissive 2、永久关闭selinux。
执行命令：
# vim /etc/selinux/config # 这两种配置文件效果一样，任选其一。
# vim /etc/sysconfig/selinux 修改内容：
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
# SELINUX=enforcing # 注释第一行即可
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
# SELINUXTYPE=targeted # 注释这一行即可 修改主机名
修改命令如下：
# hostnamectl set-hostname K8s-master
# bash
# 配置主机和IP地址映射关系
1、修改配置文件。
执行命令：
# vim /etc/hosts 添加内容：
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
K8s-master 192.168.43.2 # 前面是主机名，后面是对应IP
K8s-node01 192.168.43.3
K8s-node02 192.168.43.4 2、重载配置文件。
# systemctl daemon-reload 配置网络yum源
阿里云Centos7镜像下载地址：Centos7地址
1、安装wget工具。
# yum -y install wget 2、备份本地源。
# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup 3、下载阿里云镜像源。
# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo 4、生成缓存。
# yum makecache5、安装epel扩展源（可以搜到更多的包）。
# yum install -y epel-release
来源:https://www.cnblogs.com/Bookcict/p/17224025.html
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