docker起动报错IPv4 forwarding is disabled

[root@corpse ~]#docker run -it tomcat:latest
WARNING: IPv4 forwarding is disabled. Networking will not work.
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/openjdk-11
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar

方法：

# vim /usr/lib/sysctl.d/00-system.conf

添加：net.ipv4.ip_forward=1

Linux的内核参数net.ipv4.ip_forward参数指定了Linux系统当前对路由转发功能的支持情况；其值为0时表示禁止进行IP转发；是1,IP转发功能已经打开。

[root@corpse ~]# echo "net.ipv4.ip_forward=1" >>/usr/lib/sysctl.d/00-system.conf
 

[root@corpse ~]# systemctl  restart network