VM与VBOX中CentOS 7是怎么配置网卡

这期内容当中小编将会给大家带来有关VM与VBOX中CentOS 7是怎么配置网卡，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

我们经常需要复制VM和VBOX的虚拟机，绕不开的一个步骤是网卡的重新配置。
有时候这个东西特别繁琐。
这里记录一个稍微简单的操作，没有udev的设备绑定各种骚操作。。。

1、 新复制的虚拟机，请选择重新生成MAC地址，这个步骤在复制（克隆，WHATEVER）的时候，或者在复制完成，又或者完成后点配置，网卡属性，高级属性（各种平台各不相同，找到重新生成MAC地址，勾上或者刷新）。记录下这个MAC地址
2、新虚拟机启动以后，无论网络是否正常，停掉NetworkManager.Service...真的没有那么好用。
systemctl stop NetworkManager
systemctl disable NetworkManager
3、运行ifconfig -a, 得到新网卡的网卡名称，（也是设备名称，结合刚才记录下的MAC地址，很容易对上）
4、到/etc/sysconfig/network-scripts文件夹修改ifcfg-enxxx网卡启动配置文件
4.1、 强烈建议删除ifcfg-profile1类似这个脚本，这个是NetManager遗留。
4.2、 用uuidgen enxxx这样的格式得到uuid写入配置档。
4.3、 写完配置档，重启网卡设备systemctl restart network。如果没有报错就完成了。

####举例：
###配置一个网卡最终要三个要素，设备名，MAC地址，UUID

eno16777736: flags=4163  mtu 1500        inet 192.168.1.201  netmask 255.255.255.0  broadcast 192.168.1.255        inet6 fe80::20c:29ff:fe4a:b12c  prefixlen 64  scopeid 0x20        ether 00:0c:29:4a:b1:2c  txqueuelen 1000  (Ethernet)        RX packets 3647  bytes 3417904 (3.2 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 142  bytes 18249 (17.8 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0eno33554992: flags=4163  mtu 1500        inet 192.168.199.241  netmask 255.255.255.0  broadcast 192.168.199.255        inet6 fe80::20c:29ff:fe4a:b136  prefixlen 64  scopeid 0x20        ether 00:0c:29:4a:b1:36  txqueuelen 1000  (Ethernet)        RX packets 5605  bytes 3465915 (3.3 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 1400  bytes 322360 (314.8 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

###uuidgen （注意，UUID每次生成都不同，但是每个生成的ID都是可以用的）

[root@mysql01 dev]# uuidgen eno16777736fd32246b-c655-45c6-ab6a-7a6aa84faa72[root@mysql01 network-scripts]# uuidgen eno3355499244e70d2f-4bf1-4753-865b-8fb042ecc8d6

###停止NetworkManager

[root@mysql01 network-scripts]# systemctl stop NetworkManager[root@mysql01 network-scripts]# systemctl disable NetworkManagerRemoved 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@mysql01 network-scripts]# systemctl status NetworkManager* NetworkManager.service - Network Manager   Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; disabled; vendor preset: enabled)   Active: inactive (dead) since 日 2020-01-26 14:22:15 CST; 36s ago Main PID: 8417 (code=exited, status=0/SUCCESS)1月 26 14:22:07 mysql01 NetworkManager[8417]:   (eno16777736): Activation: successful, device activated.1月 26 14:22:07 mysql01 NetworkManager[8417]:   wpa_supplicant running1月 26 14:22:07 mysql01 NetworkManager[8417]:   (virbr0): device state change: secondaries -> activated (reason 'none...100 0]1月 26 14:22:07 mysql01 NetworkManager[8417]:   (virbr0): Activation: successful, device activated.1月 26 14:22:15 mysql01 NetworkManager[8417]:   caught SIGTERM, shutting down normally.1月 26 14:22:15 mysql01 NetworkManager[8417]:   (virbr0): bridge port virbr0-nic was detached1月 26 14:22:15 mysql01 NetworkManager[8417]:   (virbr0-nic): released from master virbr01月 26 14:22:15 mysql01 systemd[1]: Stopping Network Manager...1月 26 14:22:15 mysql01 NetworkManager[8417]:   exiting (success)1月 26 14:22:15 mysql01 systemd[1]: Stopped Network Manager.Hint: Some lines were ellipsized, use -l to show in full.[root@mysql01 network-scripts]# ifconfig

###写配置档：（这里的UUID可能和我上面获得的不同,因为配置档是之前就写好的.）
-rw-r--r--. 1 root root 292 1月 24 14:52 ifcfg-eno16777736
-rw-r--r--. 1 root root 367 1月 26 13:29 ifcfg-eno33554992

[root@mysql01 network-scripts]# cat ifcfg-eno16777736TYPE=EthernetBOOTPROTO=noneDEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noNAME=eno16777736UUID=a808b074-580f-4ff7-b70a-e307769e8d96DEVICE=eno16777736ONBOOT=yesIPADDR=192.168.1.201PREFIX=24IPV6_PEERDNS=yesIPV6_PEERROUTES=yes[root@mysql01 network-scripts]# cat ifcfg-eno33554992TYPE=EthernetBOOTPROTO=staticIPADDR0=192.168.199.241PREFIXO0=24GATEWAY=192.168.199.1DNS1=192.168.199.1DEFROUTE=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_FAILURE_FATAL=noNAME=eno33554992UUID=9c7d8550-2d46-45c1-9c40-ef09570e1608DEVICE=eno33554992ONBOOT=yesPEERDNS=yesPEERROUTES=yesIPV6_PEERDNS=yesIPV6_PEERROUTES=yes

###重启网络服务:

[root@mysql01 network-scripts]# systemctl restart network.service[root@mysql01 network-scripts]#

###没有报错

[root@mysql01 network-scripts]# systemctl status network.service* network.service - LSB: Bring up/down networking   Loaded: loaded (/etc/rc.d/init.d/network)   Active: active (exited) since 日 2020-01-26 14:27:22 CST; 18s ago     Docs: man:systemd-sysv-generator(8)  Process: 8612 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS)  Process: 8839 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=0/SUCCESS)1月 26 14:27:17 mysql01 systemd[1]: Starting LSB: Bring up/down networking...1月 26 14:27:17 mysql01 network[8839]: [29B blob data]1月 26 14:27:19 mysql01 network[8839]: [37B blob data]1月 26 14:27:22 mysql01 network[8839]: [37B blob data]1月 26 14:27:22 mysql01 systemd[1]: Started LSB: Bring up/down networking.[root@mysql01 network-scripts]#

###尝试ifup/ifdown脚本：

[root@mysql01 network-scripts]# ifdown eno16777736[root@mysql01 network-scripts]# ifconfig eno16777736eno16777736: flags=4098  mtu 1500        ether 00:0c:29:4a:b1:2c  txqueuelen 1000  (Ethernet)        RX packets 4359  bytes 4215191 (4.0 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 169  bytes 22144 (21.6 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0[root@mysql01 network-scripts]# ifup eno16777736[root@mysql01 network-scripts]# ifconfig eno16777736eno16777736: flags=4163  mtu 1500        inet 192.168.1.201  netmask 255.255.255.0  broadcast 192.168.1.255        inet6 fe80::20c:29ff:fe4a:b12c  prefixlen 64  scopeid 0x20        ether 00:0c:29:4a:b1:2c  txqueuelen 1000  (Ethernet)        RX packets 4362  bytes 4218484 (4.0 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 187  bytes 25011 (24.4 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0[root@mysql01 network-scripts]# [root@mysql01 network-scripts]# ifdown eno33554992[root@mysql01 Desktop]# ifconfig eno33554992eno33554992: flags=4098  mtu 1500        ether 00:0c:29:4a:b1:36  txqueuelen 1000  (Ethernet)        RX packets 7980  bytes 4516864 (4.3 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 2422  bytes 504771 (492.9 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0[root@mysql01 Desktop]# ifup eno33554992[root@mysql01 Desktop]# ifconfig eno33554992eno33554992: flags=4163  mtu 1500        inet 192.168.199.241  netmask 255.255.255.0  broadcast 192.168.199.255        inet6 fe80::20c:29ff:fe4a:b136  prefixlen 64  scopeid 0x20        ether 00:0c:29:4a:b1:36  txqueuelen 1000  (Ethernet)        RX packets 7982  bytes 4519567 (4.3 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 2440  bytes 507648 (495.7 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0[root@mysql01 Desktop]#

上述就是小编为大家分享的VM与VBOX中CentOS 7是怎么配置网卡了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注行业资讯频道。