1、通过 docker inspect CONTAINERID | grep Address 查看容器的ip

[root@master ~]# docker inspect deadfda1b35d | grep Address
            "LinkLocalIPv6Address": "",
            "SecondaryIPAddresses": null,
            "SecondaryIPv6Addresses": null,
            "GlobalIPv6Address": "",
            "IPAddress": "172.17.0.3",
            "MacAddress": "02:42:ac:11:00:03",
                    "IPAddress": "172.17.0.3",
                    "GlobalIPv6Address": "",
                    "MacAddress": "02:42:ac:11:00:03"

2、通过telnet命令测试，发现连接拒绝

[root@master ~]# telnet 172.17.0.3 8788
Trying 172.17.0.3...
telnet: connect to address 172.17.0.3: Connection refused

3、启动容器时，已经映射端口，所以不存在是因为没有-p映射的问题

docker run  -it -v /root/soft/docker/lunwen/:/app/ -p  127.0.0.1:8788:8788 --privileged=true  6d64501af04c   /bin/bash

4、通过docker ps -a查看，端口映射也是对的

[root@master ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                  PORTS                               NAMES
deadfda1b35d        6d64501af04c        "/bin/bash"              About an hour ago   Up 7 minutes            127.0.0.1:8788->8788/tcp            unruffled_cori

5、最终发现，flask启动时，设置的ip为127.0.0.1，改为0.0.0.0就没问题