CentOS 7 docker 部署遇到内网通，外网不通 问题

[root@localhost ~]# systemctl status network
● 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 Tue 2024-09-03 14:21:22 CST; 4min 31s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2974 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
    Tasks: 0
   Memory: 152.0K

Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:22 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Sep 03 14:21:22 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Sep 03 14:21:22 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Sep 03 14:21:22 localhost.localdomain systemd[1]: network.service failed.

解决方法：

1、禁止开机启动

systemctl stop NetworkManager

2、禁止开机启动

systemctl disable NetworkManager

3、重启网卡

systemctl restart network

再次重启网卡,启动成功

分析原因：

重启网卡

systemctl restart network

如果重启/启动网卡失败，提示

 Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details.

原文链接：linux网卡启动失败参考_linux重启网卡失败-CSDN博客

则使用 systemctl status network.service 命令查看错误详情。

[root@localhost ~]# systemctl status network
● 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 Tue 2024-09-03 14:21:22 CST; 4min 31s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 2974 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE)
    Tasks: 0
   Memory: 152.0K

Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:21 localhost.localdomain network[2974]: RTNETLINK answers: File exists
Sep 03 14:21:22 localhost.localdomain systemd[1]: network.service: control process exited, code=exited status=1
Sep 03 14:21:22 localhost.localdomain systemd[1]: Failed to start LSB: Bring up/down networking.
Sep 03 14:21:22 localhost.localdomain systemd[1]: Unit network.service entered failed state.
Sep 03 14:21:22 localhost.localdomain systemd[1]: network.service failed.

出现这种报错一般是和 NetworkManager 服务冲突导致的，直接关闭 NetworkManger 服务就好了，

1、禁止开机启动

systemctl stop NetworkManager

2、禁止开机启动

systemctl disable NetworkManager

3、重启网卡

systemctl restart network

如果还有问题的话，继续往下看

上述操作以后还是不行的话，可能是文件权限的问题，找到网卡信息(ip addr 指令查看自己的网络名称 ，本文的是enp2s0)，所以如下：

sudo chmod 777 ./ifcfg-enp2s0

重启网卡

systemctl restart network

还不行的话，再添加mac id

查询 ip

ip addr

如下图红框标记的几位硬件macid

配置文件添加/修改Mac

vi /etc/sysconfig/network-scripts/ifcfg-eth0

#添加修改Mac地址
HWADDR=00:e0:**:01:**:63

3)、重启网络

systemctl restart network

#查看网络
systemctl status network