Docker image for TURN server

A Docker container with the Coturn TURN server

sudo docker run -d -p 3478:3478 -p 3478:3478/udp --restart=always zolochevska/turn-server username password realm

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TURN ports are not published

Hey Anastasia,

I'm using your docker image to run a stun/turn server for an WebRTC application. I'm starting your image as follows on my server/host (e.g., IP 1.2.3.4):

sudo docker run -d -p 3478:3478 -p 3478:3478/udp --name coturn --restart=always zolochevska/turn-server username password realm

netstat -tulpen on the host shows me, that's working:

$ netstat -tulpen
tcp6       0      0 :::3478                 :::*                    LISTEN      0          54938       4639/docker-proxy
tcp6       0      0 :::22                   :::*                    LISTEN      0          18123       1680/sshd       
udp6       0      0 :::3478                 :::*                                0          54991       4655/docker-proxy

Well, if WebRTC runs a turn request, I am getting a relay candidate (Chrome):

{"candidate":"candidate:3 1 UDP 92217087 1.2.3.4 54277 typ relay raddr 1.2.3.4 rport

Looking into netstat on the host, nothing changed. Thus I jumped into the container:

docker exec -it coturn /bin/bash

Running netstat -tulpen in the container (I installed the package net-tools), I see that the UDP port 54277 is bound inside the container:

$ netstat -tulpen
tcp        0      0 127.0.0.1:5766          0.0.0.0:*               LISTEN      0          55163       17/turnserver   
tcp        0      0 172.17.0.2:3478         0.0.0.0:*               LISTEN      0          55180       17/turnserver   
tcp        0      0 172.17.0.2:3478         0.0.0.0:*               LISTEN      0          55176       17/turnserver   
udp        0      0 172.17.0.2:54277        0.0.0.0:*                           0          58941       17/turnserver   
udp        0      0 172.17.0.2:3478         0.0.0.0:*                           0          55160       17/turnserver   
udp        0      0 172.17.0.2:3478         0.0.0.0:*                           0          55159       17/turnserver

Using 1.2.3.4 54277 fails, since the bound port is not exposed to the host.