安装Centos7初始化操作系统

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摘要

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:


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:

[root@localhost ~]# 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。

[root@localhost ~]# systemctl restart network

 3、查看IP地址是否已经更改。

[root@localhost ~]# 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。

[root@localhost ~]# 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。

[root@localhost ~]# iptables -F [root@localhost ~]# systemctl stop firewalld [root@localhost ~]# systemctl disable firewalld Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service. Removed symlink /etc/systemd/system/basic.target.wants/firewalld.service. [root@localhost ~]# 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[1]: Starting firewalld - dynami.... Mar 16 02:52:27 localhost.localdomain systemd[1]: Started firewalld - dynamic.... Mar 16 03:45:13 localhost.localdomain systemd[1]: Stopping firewalld - dynami.... Mar 16 03:45:18 localhost.localdomain systemd[1]: Stopped firewalld - dynamic.... Hint: Some lines were ellipsized, use -l to show in full.

 关闭selinux

1、临时关闭selinux。

[root@localhost ~]# getenforce Enforcing [root@localhost ~]# setenforce 0 [root@localhost ~]# getenforce Permissive

 2、永久关闭selinux。

执行命令:

[root@localhost ~]# vim /etc/selinux/config       # 这两种配置文件效果一样,任选其一。 [root@localhost ~]# 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:

[root@localhost ~]# hostnamectl set-hostname K8s-master [root@localhost ~]# bash [root@k8s-master ~]# 

 配置主机和IP地址映射关系

1、修改配置文件。

执行命令:

[root@k8s-master ~]# 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。

[root@k8s-master ~]# 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。

[root@k8s-master ~]# yum -y install wget

 2、备份本地源。

[root@k8s-master ~]# 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。

[root@k8s-master ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

 4、生成缓存。

[root@k8s-master ~]# yum makecache

5、安装epel扩展源(可以搜到更多的包)。

[root@k8s-master ~]# yum install -y epel-release