Centos 7.3 修改网卡顺序以及网卡名字

Centos 7.3 修改网卡顺序以及网卡名字

网上一些常见的修改这里就不赘述了，此篇文章主要用于修改网卡名字不生效的问题排查

[email protected]# udevadm test /sys/class/net/eth0

calling: test
version 219
This program is for debugging only, it does not run any program
specified by a RUN key. It may show incorrect results, because
some values may be different, or not available at a simulation run.

=== trie on-disk ===
tool version:          219
file size:         7477022 bytes
header size             80 bytes
strings            1947422 bytes
nodes              5529520 bytes
Load module index
Created link configuration context.
timestamp of '/etc/udev/rules.d' changed
Reading rules file: /usr/lib/udev/rules.d/10-dm.rules
Reading rules file: /usr/lib/udev/rules.d/11-dm-lvm.rules
Reading rules file: /usr/lib/udev/rules.d/13-dm-disk.rules
Reading rules file: /usr/lib/udev/rules.d/40-redhat.rules
Reading rules file: /usr/lib/udev/rules.d/40-usb_modeswitch.rules
Reading rules file: /usr/lib/udev/rules.d/42-usb-hid-pm.rules
Reading rules file: /usr/lib/udev/rules.d/50-udev-default.rules
Reading rules file: /usr/lib/udev/rules.d/60-alias-kmsg.rules
Reading rules file: /usr/lib/udev/rules.d/60-cdrom_id.rules
Reading rules file: /usr/lib/udev/rules.d/60-drm.rules
Reading rules file: /usr/lib/udev/rules.d/60-fprint-autosuspend.rules
Reading rules file: /usr/lib/udev/rules.d/60-keyboard.rules
Reading rules file: /usr/lib/udev/rules.d/60-net.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-alsa.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-input.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-serial.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage-tape.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-storage.rules
Reading rules file: /usr/lib/udev/rules.d/60-persistent-v4l.rules
Reading rules file: /usr/lib/udev/rules.d/60-raw.rules
Reading rules file: /usr/lib/udev/rules.d/61-accelerometer.rules
Reading rules file: /usr/lib/udev/rules.d/63-md-raid-arrays.rules
Reading rules file: /usr/lib/udev/rules.d/64-btrfs-dm.rules
Reading rules file: /usr/lib/udev/rules.d/64-btrfs.rules
Reading rules file: /usr/lib/udev/rules.d/65-md-incremental.rules
Reading rules file: /usr/lib/udev/rules.d/66-azure-ephemeral.rules
Reading rules file: /usr/lib/udev/rules.d/69-dm-lvm-metad.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervfcopy.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervkvp.rules
Reading rules file: /usr/lib/udev/rules.d/70-hypervvss.rules
Reading rules file: /usr/lib/udev/rules.d/70-mouse.rules
Reading rules file: /etc/udev/rules.d/70-persistent-ipoib.rules
Reading rules file: /etc/udev/rules.d/70-persistent-net.rules
Reading rules file: /usr/lib/udev/rules.d/70-power-switch.rules
Reading rules file: /usr/lib/udev/rules.d/70-touchpad.rules
Reading rules file: /usr/lib/udev/rules.d/70-uaccess.rules
Reading rules file: /usr/lib/udev/rules.d/71-biosdevname.rules
Reading rules file: /usr/lib/udev/rules.d/71-seat.rules
Reading rules file: /usr/lib/udev/rules.d/73-idrac.rules
Reading rules file: /usr/lib/udev/rules.d/73-seat-late.rules
Reading rules file: /usr/lib/udev/rules.d/75-net-description.rules
Reading rules file: /usr/lib/udev/rules.d/75-probe_mtd.rules
Reading rules file: /usr/lib/udev/rules.d/75-tty-description.rules
Reading rules file: /usr/lib/udev/rules.d/76-phys-port-name.rules
Reading rules file: /usr/lib/udev/rules.d/78-sound-card.rules
Reading rules file: /usr/lib/udev/rules.d/80-drivers.rules
Reading rules file: /usr/lib/udev/rules.d/80-net-name-slot.rules
Reading rules file: /usr/lib/udev/rules.d/80-net-setup-link.rules
Reading rules file: /usr/lib/udev/rules.d/81-kvm-rhel.rules
Reading rules file: /usr/lib/udev/rules.d/84-nm-drivers.rules
Reading rules file: /usr/lib/udev/rules.d/85-nm-unmanaged.rules
Reading rules file: /usr/lib/udev/rules.d/85-regulatory.rules
Reading rules file: /usr/lib/udev/rules.d/90-alsa-tools-firmware.rules
Reading rules file: /usr/lib/udev/rules.d/90-iprutils.rules
Reading rules file: /usr/lib/udev/rules.d/90-vconsole.rules
Reading rules file: /usr/lib/udev/rules.d/91-drm-modeset.rules
Reading rules file: /usr/lib/udev/rules.d/95-dm-notify.rules
Reading rules file: /usr/lib/udev/rules.d/95-udev-late.rules
Reading rules file: /usr/lib/udev/rules.d/98-kexec.rules
Reading rules file: /usr/lib/udev/rules.d/98-rdma.rules
Reading rules file: /usr/lib/udev/rules.d/99-qemu-guest-agent.rules
Reading rules file: /usr/lib/udev/rules.d/99-systemd.rules
Reading rules file: /usr/lib/udev/rules.d/99-vmware-scsi-udev.rules
Reading rules file: /usr/lib/udev/rules.d/rdma-ndd.rules
rules contain 49152 bytes tokens (4096 * 12 bytes), 17522 bytes strings
4608 strings (48995 bytes), 3414 de-duplicated (32668 bytes), 1195 trie nodes used
NAME 'eth1' /etc/udev/rules.d/70-persistent-net.rules:1
no db file to read /run/udev/data/+virtio:virtio0: No such file or directory
IMPORT builtin 'net_id' /usr/lib/udev/rules.d/75-net-description.rules:6
IMPORT builtin 'hwdb' /usr/lib/udev/rules.d/75-net-description.rules:12
IMPORT builtin 'path_id' /usr/lib/udev/rules.d/80-net-setup-link.rules:5
IMPORT builtin 'net_setup_link' /usr/lib/udev/rules.d/80-net-setup-link.rules:9
No matching link configuration found.
Error changing net interface name 'eth0' to 'eth1': Device or resource busy
could not rename interface '2' from 'eth0' to 'eth1': Device or resource busy
created db file '/run/udev/data/n2' for '/devices/pci0000:00/0000:00:03.0/virtio0/net/eth0'
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:03.0/virtio0/net/eth0
ID_BUS=pci
ID_MODEL_FROM_DATABASE=Virtio network device
ID_MODEL_ID=0x1000
ID_NET_DRIVER=virtio_net
ID_PATH=virtio-pci-0000:00:03.0
ID_PATH_TAG=virtio-pci-0000_00_03_0
ID_PCI_CLASS_FROM_DATABASE=Network controller
ID_PCI_SUBCLASS_FROM_DATABASE=Ethernet controller
ID_VENDOR_FROM_DATABASE=Red Hat, Inc
ID_VENDOR_ID=0x1af4
IFINDEX=2
INTERFACE=eth0
SUBSYSTEM=net
SYSTEMD_ALIAS=/sys/subsystem/net/devices/eth1
TAGS=:systemd:
USEC_INITIALIZED=39514
Unload module index
Unloaded link configuration context.

以上输出经常中常有类似错误为

1. could not rename interface ‘2’ from ‘eth0’ to ‘eth1’: Device or resource busy
   解决方法：由于系统启动时eth0和eth1处于active因此无法改名，可以通过修改配置文件中的ONBOOT=no
2. system exist eth1
   解决方法：由于系统中已经存在eth1因此eth0无法修改成eth1，可以通过先修改eth0和eth1为eth3以及eth4，然后再修改eth3和eth4为eth1和eth0，以达到对换网卡顺序的效果

说明：根据命令中可以知道udev先读取/etc/udev/rules.d/70-persistent-net.rules，也有可能会读取/usr/lib/udev/rules.d下的一些文件，根据输出去修改相应的文件内容类似如下：

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="fa:16:3e:b4:ab:74", NAME="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="fa:16:3e:4d:08:8d", NAME="eth1"

改完之后重启系统即可