CentOS7 Docker starts a web service and uses port mapping to report an error:
WARNING: IPv4 forwarding is disabled. Networking will not work.
Find a solution to make the network support IP4
[root@cxt ~]# vi /etc/sysctl.conf
Add the following code:
net.ipv4.ip_forward=1
Restart the network service
[root@cxt ~]# systemctl restart network
View the modification results (ip_forward=1 Indicates success)
[root@cxt ~]# sysctl net.ipv4.ip_forward net.ipv4.ip_forward = 1
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