最近安裝了CentOS7，內核總算升級到3.10,支持Linux容器，network namespace·······
但是安裝完之后，發現ifconfig沒看到熟悉的eth0，卻是enp0s3，雖然只是一個網卡代號，但明顯會影響一些腳本，帶來諸多不方便，也不知道CentOS為何設置成這樣。於是想把他改回來。
[root@localhost fbw]# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.2.5 netmask 255.255.255.0 broadcast 10.0.2.255 inet6 fe80::a00:27ff:fe80:4d3c prefixlen 64 scopeid 0x20<link> ether 08:00:27:80:4d:3c txqueuelen 1000 (Ethernet) RX packets 2134 bytes 176901 (172.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1504 bytes 206316 (201.4 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 538 bytes 46716 (45.6 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 538 bytes 46716 (45.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |
於是參考之前的一篇日志 Centos 配置eth0 提示Device does not seem to be present ，先去將ifcfg-enp0s3重命名為ifcfg-eth0，然后去查看/etc/udev/rules.d/70-persistent-net.rules文件，居然發現CentOS7里面沒有這個文件，看來之前刪除這個重啟的方法不奏效了。
先百度一下，找到了一篇《 Centos Linux系統安裝后網卡em改回eth的兩種方法》，看了其中的第二個方法，改了一下grub的引導文件，重啟一下，發現還是沒有改名。
后google了一下，找到了一篇《Change default network name to old “eth0″ on RHEL 7 / Fedora 19 above》，也是改了一下grub文件，重啟之后成功解決！！！
具體步驟如下：
1、 vim /etc/default/grub
GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=”$(sed ‘s, release .*$,,g’ /etc/system-release)” GRUB_DEFAULT=saved GRUB_DISABLE_SUBMENU=true GRUB_TERMINAL_OUTPUT=”console” GRUB_CMDLINE_LINUX=”rd.lvm.lv=rootvg/usrlv rd.lvm.lv=rootvg/swaplv crashkernel=auto vconsole.keymap=us rd.lvm.lv=rootvg/rootlv vconsole.font=latarcyrheb-sun16 rhgb quiet” GRUB_DISABLE_RECOVERY=”true”
在GRUB_CMDLINE_LINUX的最后，加上 net.ifnames=0 biosdevname=0 的參數
GRUB_CMDLINE_LINUX=”rd.lvm.lv=rootvg/usrlv rd.lvm.lv=rootvg/swaplv crashkernel=auto vconsole.keymap=us rd.lvm.lv=rootvg/rootlv vconsole.font=latarcyrheb-sun16 rhgb quiet net.ifnames=0 biosdevname=0”
2、 grub2-mkconfig -o /boot/grub2/grub.cfg
3、 mv /etc/sysconfig/network-scripts/ifcfg-enp0s3 /etc/sysconfig/network-scripts/ifcfg-eth0
4、 reboot
最后成功將網卡重名為eth0，嗯~~，還是那個味道，還是那么親切~~~
[fbw@localhost ~]$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.5 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::a00:27ff:fe80:4d3c prefixlen 64 scopeid 0x20<link>
ether 08:00:27:80:4d:3c txqueuelen 1000 (Ethernet)
RX packets 56 bytes 7959 (7.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 70 bytes 10796 (10.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 0 (Local Loopback)
RX packets 5 bytes 580 (580.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 5 bytes 580 (580.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 |