Connecting two instance peers

[William Sleeman]

I need to run two different instances of Orthanc and send data from one to the other. The documentation seemed pretty clear so I started two Docker containers on the same machine with the following commands and modified key configuration values:

A:

"HttpPort" : 8042
"DicomPort" : 4242
"OrthancPeers" : {
    "peer" : [ "http://127.0.0.1:8043/" ]
}
"RemoteAccessAllowed" : true
"AuthenticationEnabled" : false

docker run -p 4242:4242 -p 8042:8042 --rm -v /tmp/orthancLocal.json:/etc/orthanc/orthanc.json -v orthanc-local-storage:/var/lib/orthanc/db jodogne/orthanc

B:

"HttpPort" : 8043
"DicomPort" : 4243
RemoteAccessAllowed" : true
"AuthenticationEnabled" : false

docker run -p 4243:4243 -p 8043:8043 --rm -v /tmp/orthancLocal2.json:/etc/orthanc/orthanc.json:ro -v orthanc-local-storage2:/var/lib/orthanc/db jodogne/orthanc

After running both A and B, I tried the `curl http://localhost:8042/peers?expand` command and got:

{
   "peer" : {
      "HttpHeaders" : [],
      "Pkcs11" : false,
      "Url" : "http://127.0.0.1:8043/"
   }
}

Then I tried to test the connection with `curl http://localhost:8042/peers/peer/system` and got:

{
   "Details" : "libCURL error: Couldn't connect to server",
   "HttpError" : "Internal Server Error",
   "HttpStatus" : 500,
   "Message" : "Error in the network protocol",
   "Method" : "GET",
   "OrthancError" : "Error in the network protocol",
   "OrthancStatus" : 9,
   "Uri" : "/peers/peer/system"
}

Both A and B versions are up and running but I could not find any information about what might be causing this issue. Any further attempts of sending data via POST also fails as expected. Is there another step I am missing or am I using the peer set up incorrectly?

[James Manners]

Hi William,

The problem is by default docker uses bridge networking and in this mode local host refers to the container itself. Not your host machine. See https://stackoverflow.com/questions/24319662/from-inside-of-a-docker-container-how-do-i-connect-to-the-localhost-of-the-mach#24326540 for more info. 

The easiest way to get around this is change localhost to the up address of your host machine. 

Hope that helps. 

James

James Manners • Director Suite 3, Level 2, 10 Queens Road, Melbourne, Victoria 3004, Australia T:  03 9017 5230 M:  0422 973 235 E:  ja...@binary.com.au W:  binary.com.au

On 4 Sep 2020, at 4:53 am, William Sleeman <wcsl...@mymail.vcu.edu> wrote:

I need to run two different instances of Orthanc and send data from one to the other. The documentation seemed pretty clear so I started two Docker containers on the same machine with the following commands and modified key configuration values:

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[William Sleeman]

Thanks James, that was the problem and it looks like everything is working now.