Created question in FIWARE Q/A platform on 15-11-2017 at 11:11
Please, ANSWER this question AT https://stackoverflow.com/questions/47304382/no-remote-stream-using-kurento-docker-image-with-kurento-hello-world-example-on

Question:
No remote stream using kurento docker image with kurento hello world example on host

Description:
I installed a KMS container on my server and I downloaded kurento hello world java application on my server but when I go to my java web application using my server IP adress I have to remote stream and and the following error (in firefox):

ICE failed, see about:webrtc for more details

in the about:webrtc It tells me that there is no STUN and no TURN server specified (and a lot of following output not very clear to me) The problem is that I specified a STUN server on the WebRtcEndpoint.conf.ini.

Here is my docker-compose.yml file:

kurento:
image: fiware/stream-oriented-kurento:latest
volumes:

• ./kurento.conf.json:/etc/kurento/kurento.conf.json:ro
• ./defaultCertificate.pem:/etc/kurento/defaultCertificate.pem:ro
• ./WebRtcEndpoint.conf.ini:/etc/kurento/modules/kurento/WebRtcEndpoint$
  ports:
• "8888:8888"
• "8433:8433"

here is my kurento.conf.json file:

{
"mediaServer" : {
"resources": {
// //Resources usage limit for raising an exception when an object creatio$
// "exceptionLimit": "0.8",
// // Resources usage limit for restarting the server when no objects are $
// "killLimit": "0.7",
// Garbage collector period in seconds
"garbageCollectorPeriod": 240
},

"net" : {
"websocket": {
"port": 8888,
"secure":

,
//"registrar":

,
"path": "kurento",
"threads": 10
}
}
}
}

and my WebRtcEndpoint.conf.ini

; Only IP address are supported, not domain names for addresses
; You have to find a valid stun server. You can check if it works
; usin this tool:
; http://webrtc.github.io/samples/src/content/peerconnection/trickle-ice/
stunServerAddress=62.71.2.168
stunServerPort=3478

; turnURL gives the necessary info to configure TURN for WebRTC.
; 'address' must be an IP (not a domain).
; 'transport' is optional (UDP by default).
; turnURL=user:password@address:port(?transport=[udp|tcp|tls])

;pemCertificate is deprecated. Please use pemCertificateRSA instead
;pemCertificate=<path>
;pemCertificateRSA=<path>
;pemCertificateECDSA=<path>

and the certificate has been generated with :

certtool --generate-privkey --outfile defaultCertificate.pem
echo 'organization = your organization name' > certtool.tmpl
certtool --generate-self-signed --load-privkey defaultCertificate.pem \
--template certtool.tmpl >> defaultCertificate.pem

sudo chown kurento defaultCertificate.pem

and I went on my https://localhost:8433/kurento to validate the certificate

When I start the kurento container with docker-compose up I can see on the logs that my conf. file has been loaded:

kurento_1 | "websocket":
kurento_1 | {
kurento_1 | "port": "8888",
kurento_1 | "secure":
kurento_1 |

,
kurento_1 | "path": "kurento",
kurento_1 | "threads": "10"
kurento_1 | }

.....

kurento_1 | "WebRtcEndpoint":
kurento_1 |

,

and I start the hello world example with :

sudo mvn compile exec:java -Dkms.url=wss://localhost:8433/kurento

at this point everything seems to work OK, no error output.

When I try to access my web application from a client with https://:8443 the web page is loaded correctly and can start the stream. But I have no remote stream and have the error I printed at the beginning.

UPDATE 1

I changed the version of the kurento image in docker-compose.yml from

image: fiware/stream-oriented-kurento:latest

to:

image: fiware/stream-oriented-kurento:6.6.0

And now it is working sometimes. I have the same error (ICE failed, see about:webrtc for more details) but if I reload the page multiple time, it end up working after some reload. Any suggestion about what I am doing wrong?

UPDATE 2

I realized that when the web application start working (after multiple reload), the next time I access the web applicaiton, it will always work, until I restart the KMS. Then I have to reaload the page multiple time again to have the remote stream.

Now that I realized that, I tried again with image: fiware/stream-oriented-kurento:latest and it has the exact same behavior. I have to reload multiple time the page to make it work. I have no clue why is that, any idea?