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CentOS7.2 设置静态ip

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12/02
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先找到配置文件： 

[root@localhost bin]# cd /etc/sysconfig/network-scripts

[root@localhost network-scripts]# ls

ifcfg-eno16777736  ifdown-ppp       ifup-ib      ifup-Team

ifcfg-lo           ifdown-routes    ifup-ippp    ifup-TeamPort

ifdown             ifdown-sit       ifup-ipv6    ifup-tunnel

ifdown-bnep        ifdown-Team      ifup-isdn    ifup-wireless

ifdown-eth         ifdown-TeamPort  ifup-plip    init.ipv6-global

ifdown-ib          ifdown-tunnel    ifup-plusb   network-functions

ifdown-ippp        ifup             ifup-post    network-functions-ipv6

ifdown-ipv6        ifup-aliases     ifup-ppp

ifdown-isdn        ifup-bnep        ifup-routes

ifdown-post        ifup-eth         ifup-sit

[root@localhost network-scripts]# gedit ifcfg-eno16777736

开始配置是： 

TYPE="Ethernet"

BOOTPROTO="dhcp"

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"

NAME="eno16777736"

UUID="157c8fb5-23b3-414c-8519-25bef9b20a54"

DEVICE="eno16777736"

ONBOOT="yes"

修改成： 

TYPE="Ethernet"

#BOOTPROTO="dhcp"

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"

NAME="eno16777736"

UUID="157c8fb5-23b3-414c-8519-25bef9b20a54"

DEVICE="eno16777736"

#ONBOOT="yes"

#static assignment

NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理

ONBOOT=yes #开机启动

BOOTPROTO=static #静态IP

IPADDR=192.168.1.122 #本机地址

NETMASK=255.255.255.0 #子网掩码

GATEWAY=192.168.1.1 #默认网关

修改/etc/sysconfig/network 

# Created by anaconda

NETWORKING=yes

GATEWAY=192.168.1.1

DNS1=119.29.29.29

DNS2=182.254.116.116

然后重启服务即可 

service network restart

一般这样就可以，但是如果有问题

必须要在network-scripts里面的默认的文件里面添加HWADDR 

[root@localhost ~]# ip addr

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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:a7:a0:8c brd ff:ff:ff:ff:ff:ff

    inet 192.168.1.104/24 brd 192.168.1.255 scope global dynamic eno16777736

       valid_lft 7141sec preferred_lft 7141sec

    inet 192.168.1.122/24 brd 192.168.1.255 scope global secondary eno16777736

       valid_lft forever preferred_lft forever

    inet6 fe80::ac30:2bcb:e910:3ae/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 52:54:00:74:cb:1a 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 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff

先查看具体的 link/ether

再赋值到eno16777736中

比如： 

TYPE="Ethernet"

#BOOTPROTO="dhcp"

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"

NAME="eno16777736"

UUID="157c8fb5-23b3-414c-8519-25bef9b20a54"

DEVICE="eno16777736"

#ONBOOT="yes"

#static assignment

NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理

ONBOOT=yes #开机启动

BOOTPROTO=static #静态IP

IPADDR=192.168.1.122 #本机地址

NETMASK=255.255.255.0 #子网掩码

GATEWAY=192.168.1.1 #默认网关

HWADDR=00:0c:29:a7:a0:8c

设定开机启动一个名为NetworkManager-wait-online服务，命令为：

systemctl enable NetworkManager-wait-online.service

重启服务。

=======================================================================

错误的经验：

误以为是桥接模式，后来发现是NAT,没有设置虚拟机的 虚拟网络编辑器，坑！

修改成： 

TYPE="Ethernet"

BOOTPROTO="static"

NM_CONTROLLED=no #表示该接口将通过该配置文件进行设置，而不是通过网络管理器进行管理

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"

NAME="eno16777736"

UUID="157c8fb5-23b3-414c-8519-25bef9b20a54"

DEVICE="eno16777736"

ONBOOT="yes" #系统将在启动时开启该接口。

IPADDR=192.168.1.122 #静态IP

GATEWAY=192.168.1.1 #默认网关

NETMASK=255.255.255.0 #子网掩码

#DNS1=192.168.7.1 #DNS 配置

重启网络服务： 

service network restart

重启网络服务以后ok，但是重启系统以后还是变成了动态的， 

[root@localhost ~]# ip addr

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: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:a7:a0:8c brd ff:ff:ff:ff:ff:ff

    inet 192.168.1.104/24 brd 192.168.1.255 scope global dynamic eno16777736

       valid_lft 6995sec preferred_lft 6995sec

    inet 192.168.1.122/24 brd 192.168.1.255 scope global secondary eno16777736

       valid_lft forever preferred_lft forever

    inet6 fe80::9283:cd42:a281:7a9b/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 52:54:00:74:cb:1a 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 52:54:00:74:cb:1a brd ff:ff:ff:ff:ff:ff

[root@localhost ~]# systemctl disable NetworkManager.service

Removed symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service.

Removed symlink /etc/systemd/system/dbus-org.freedesktop.NetworkManager.service.

Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.

[root@localhost ~]# chkconfig network on

[root@localhost ~]# systemctl stop NetworkManager

[root@localhost ~]# systemctl restart network

可以从上面看出两个ip

192.168.1.104

192.168.1.122

解决方法： 

systemctl disable NetworkManager.service

chkconfig network on

systemctl stop NetworkManager

systemctl restart network

如果还出现 

[hongdada@localhost ~]$ systemctl status network.service

● network.service - LSB: Bring up/down networking

   Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled)

   Active: failed (Result: exit-code) since 日 -- :: CST; 2min 45s ago

     Docs: man:systemd-sysv-generator()

  Process:  ExecStart=/etc/rc.d/init.d/network start (code=exited, status=/FAILURE)

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain network[]: RTNETLINK answers: File exists

12月  :: localhost.localdomain systemd[]: network.service: control process exited, code=exited status=

12月  :: localhost.localdomain systemd[]: Failed to start LSB: Bring up/down networking.

12月  :: localhost.localdomain systemd[]: Unit network.service entered failed state.

12月  :: localhost.localdomain systemd[]: network.service fail

那么。。。

查看https://blog.csdn.net/kokuma/article/details/72876106

可以使用journel -xe查看日志，一般就是修改配置文件里面的Name,DEVICE 为ens33

首先使用ip addr查看网卡，然后查看ifconfig

一般如果是第一次的，就是不是克隆的话，网卡名称为eno16777736,这里只要设定静态ip即可，如果是克隆的话，ip addr里面会发现网卡名称变成了ens33,这样的话，我们也必须在/etc/sysconfig/network-scripts/eno167777736文件里面把NAME,DEVICE里面的改成ens33，重新设定静态IP，重启即可。

http://www.cnblogs.com/Leo_wl/p/5484136.html

https://www.bbsmax.com/A/n2d9D39v5D/

http://www.178linux.com/9928

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