docker 启动镜像时报错“WARNING: IPv4 forwarding is disabled. Networking will not work.”

docker pull centos下载完成centos镜像后，启动该镜像docker run -d centos时报错，提示“WARNING: IPv4 forwarding is disabled. Networking will not work.”

网上搜索解决方法：

vi /etc/sysctl.conf

net.ipv4.ip_forward=1 #添加这段代码

#重启network服务

systemctl restart network && systemctl restart docker

#查看是否修改成功 （备注：返回1，就是成功）

[root@studyCMachine aaaaaaa]# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1

完成上述操作后重新启动镜像报错消失

 

参考文档

docker启动WARNING：IPv4 forwarding is disabled. Networking will not work. 报错解决办法 - 知乎