为什么我的端口没有暴露?netstat输出包括

This is my problem

这是我的问题

# docker exec -ti root_web_1 bash
[root@ca32f79bdc14]# curl couchdb:5984
curl: (7) Failed to connect to couchdb port 5984: Connection refused
[root@ca32f79bdc14]# curl redis:6379  
-ERR wrong number of arguments for 'get' command
-ERR unknown command 'Host:'
-ERR unknown command 'User-Agent:'
-ERR unknown command 'Accept:'
^C
# docker exec -ti