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前言

  每次安装新的虚拟机都需要重新在网上搜索如何配置网络，我需要写一个自己的部署步骤，增加工作效率，不用每次配置的时候再去网上去翻找。

1.只需要联网功能记录(不固定IP)

1.1 修改ifcfg-ens33

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

不需要修改太多，只需要修改onboot即可,意思是开机自动加载此配置文件。

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1.2 设置虚拟机网络设置

1.3 重启网络

systemctl restart network

2 固定IP修改模式

需要修改圈里面的地方

3 修改centos源

3.1 修改CentOS-Base.repo

# 备份原来的源
sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
sudo wget http://mirrors.aliyun.com/repo/Centos-7.repo
sudo mv Centos-7.repo /etc/yum.repos.d/CentOS-Base.repo
sudo yum update
sudo yum upgrade

如果源失败了，可以下载复制这里的文件:

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#released updates 
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

3.2 修改CentOS-SCLo-scl.repo和CentOS-SCLo-scl-rh.repo

如图所示，只需要将其mirrorlist注释掉,修改baseurl即可

# CentOS-SCLo-scl.repo
[centos-sclo-sclo]
...
baseurl=https://mirrors.aliyun.com/centos/7/sclo/x86_64/sclo/
...

# CentOS-SCLo-scl-rh.repo
[centos-sclo-rh]
...
baseurl=https://mirrors.aliyun.com/centos/7/sclo/x86_64/rh/
...

4 可能出现的错误

3.1 可能找不到ifcfg-ens33

通过ip add去查看网卡即可，如下图所示:

3.1 name or service not known

vi /etc/resolv.conf
# nameserver 114.114.114.114
# nameserver 114.114.114.115

总结

这次配置centos只碰到这些问题，以后如果遇到其他问题会继续更新。