Re: Running Pyro (nameserver for now) in a Docker container

On 16-7-2014 19:50, Steven Pav wrote:
> Hello;
> 
> I am excited to start using Pyro4. To ease deployment in our organization, I 
> plan on running services in Docker containers (see http://docker.io/ or 
> http://continuousdelivery.uglyduckling.nl/uncategorized/using-docker-as-a-
> python-development-environment/ ). To start, I tried to deploy the nameserver 
> in a docker container. However, I am unable to locate the nameserver once it 
> is running. I believe this might be related to some of the issues noted in 
> this post: http://comments.gmane.org/gmane.comp.python.pyro/2490 , namely 
> that the nameserver running within the docker container has funny ideas about 
> the name of the localhost, or what port it should be listening on, etc. 
> 
> As a MWE, I have posted the Dockerfile and some shell code to run it here: 
> https://gist.github.com/shabbychef/72657f769eba7ddeed9d . When I run it, I 
> can confirm that the container with the nameserver is running, however, I 
> cannot communicate with it, rather I get the error:
> 
>   Failed to locate the name server: Failed to locate the nameserver
> 
> Any help debugging this would be appreciated. 

You can set PYRO_LOGLEVEL=DEBUG and PYRO_LOGFILE=<some file> before starting your name
server and client code/nsc utility. This allows you to see in more detail what Pyro is
doing.

Also, can you telnet directly to the host/port your nameserver runs on?

And what does the line -p 0.0.0.0:6432:6432 -p 0.0.0.0:6433:6433/udp from the docker
script do exactly? Is this used to set up port forwarding, and if so, are you sure that
works correctly? (The telnet attempt above should point that out I think)


(By the way, if it is running on localhost, and you are trying to connect to it from the
same machine, Pyro really should be able to find it even without udp broadcasting
working. It will try to connect to 'localhost' by itself. But again, check in the
logfiles what it is doing and what problems it runs into)

Irmen


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