'Docker listening in container but not answering outside, why?

I have a docker container built with "EXPOSE 8000" among its instructions. I started the process like this:

sudo docker run -t -i -P imagename

The process in the container is listening on 8000.

# netstat -a
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 localhost:8000          *:*                     LISTEN     
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node   Path
#

On the host (i.e., outside the container), I see that port 49164 is bound to container port 8000:

[S-22]jeff@siegfried:~ $ sudo docker ps 
CONTAINER ID        IMAGE                      COMMAND             CREATED             STATUS              PORTS                     NAMES
0b0e333c6ec9        lkz:latest                 "/bin/bash"         About an hour ago   Up 6 minutes        0.0.0.0:49164->8000/tcp   lkxyz__2015-01-18_202737   
[S-22]jeff@siegfried:~ $

Inded, docker inspect says (among other things)

"NetworkSettings": {
    "Bridge": "docker0",
    "Gateway": "172.17.42.1",
    "IPAddress": "172.17.0.16",
    "IPPrefixLen": 16,
    "PortMapping": null,
    "Ports": {
        "8000/tcp": [
            {
                "HostIp": "0.0.0.0",
                "HostPort": "49164"
            }
        ]
    }
},

And yet, I can't talk to the container. Outside,

[S-22]jeff@siegfried:~ $ telnet localhost 49164
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
1,[S-22] jeff@siegfried:~ $

while inside,

# telnet localhost 8000
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /

[18/Jan/2015 23:00:59] "GET /" 200 4066
<!DOCTYPE html>
<html>
<head>
...

I would expect the telnet to 49164 on the outside to return html as it does on the inside.

Any suggestions?

docker

Solution 1:^[1]

You probably want to have the service you're running in the container to listen on 0.0.0.0 rather than 127.0.0.1

Solution 2:^[2]

Try to connect 172.17.0.16:8000 from the host. I had a similar problem with nginx. I replaced 127.0.0.1:8000 to 172.17.0.16:8000 inside the container and it worked for me.

Solution 3:^[3]

bind port 8000 of the container to TCP port 8000

docker run -d -p 8000:8000 image-name

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Liam
Solution 2	alchemist
Solution 3	Sehrish Waheed

'Docker listening in container but not answering outside, why?

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]