1、查找Docker Hub上的redis镜像[root@localhost ~]# docker search redis
3、查看镜像[root@localhost ~]# docker images redis
5、查看创建的容器[root@localhost ~]# docker ps | grep redis
7、查看firewalld状态[root@localhost ~]# systemctl status firewalld
9、开放6379端口[root@localhost ~]# firewall-cmd --zone=public --add-port=6379/tcp --permanent
11、查看是否生效[root@localhost ~]# firewall-cmd --zone=public --query-port=6379/tcp
