禁用networking相关的配置

配置文件位于/etc/network/interfaces

改用nmcli管理网卡

1. 安装NetworkManager

   # apt-get update && sudo apt-get upgrade
   # apt-get install network-manager
   # systemctl start NetworkManager.service 
   # systemctl enable NetworkManager.service
   # systemctl stop networking
   # systemctl disable networking

2. 允许NetworkManager管理网卡

   # vim /etc/NetworkManager/NetworkManager.conf

   原先内容：

   [main]
   plugins=ifupdown,keyfile
   
   [ifupdown]
   managed=false

   修改为：

   [main]
   plugins=ifupdown,keyfile
   
   [ifupdown]
   managed=true

   重启NetworkManager

   # systemctl restart NetworkManager

   NetworkManager的网卡配置文件保存在/etc/NetworkManager/system-connections/下。

附：配置网卡示例命令

1. 配置IP地址和多网卡网关优先级

# nmcli c add type ethernet ifname ens32 con-name ens32 ipv4.method manual ipv4.addresses 172.16.2.10/24 ipv4.gateway 172.16.2.1 ipv4.dns 172.16.1.10 ipv4.route-metric 100 ipv4.dns-priority 50 connection.autoconnect yes
# nmcli c add type ethernet ifname ens33 con-name ens33 ipv4.method manual ipv4.addresses 192.168.254.10/24 ipv4.gateway 192.168.254.2 ipv4.dns 192.168.254.2 ipv4.route-metric 90 ipv4.dns-priority 100 connection.autoconnect no
# nmcli c up ens32
# nmcli c up ens33

2. 配置静态路由

# nmcli connection modify ens32 +ipv4.routes "172.16.1.0/24 172.16.2.1, 10.0.0.0/8 172.16.2.1"