Hi Tim,

Thanks for the reply.

Yes these are services that are running on all the nodes. Imagine it like this: 
All slave hosts have a mongos running on 27017, a kafka broker, etc always 
running. I think I just don't know how to access them from within the 
container? My perception is that accessing localhost:27017 from within the 
container doesn't connect to the hosts' localhost:27017. If that is possible, 
how do i do it? I started a mongos on 27017 but when i tried the command 
`docker run -it --rm dockerfile/mongodb bash -c 'mongo --host localhost:27017'` 
it was unable to connect.

-- Ankur

> On 26 Oct 2014, at 21:12, Tim Chen <[email protected]> wrote:
> 
> Hi Ankur,
> 
> Not sure I understand exactly, are these common services all running on the 
> same host where you're running the container?
> 
> If it's running the same host, docker container should be able to access any 
> port in the host, if it's cross hosts then you have to setup your own bridge 
> and use the lxc-conf option, or use something like pipework.
> 
> I'm adding the lxc-conf options into the next release of mesos.
> 
> Tim
> 
> On Sun, Oct 26, 2014 at 6:39 PM, Ankur Chauhan <[email protected] 
> <mailto:[email protected]>> wrote:
> Hi all,
> 
> So I have been dabbling with docker containers in and mesos. I have the 
> following scenario and i was wondering if someone had experience with 
> something like this.
> 
> I have a bunch of dockerized apps running and the slave hosts have some 
> common services running, something like mongos and kafka brokers etc. I was 
> wondering if there was a way to expose these services (i.e. some tcp port) to 
> the docker containers?
> 
> Is this even a legitimate way of exposing services to apps but my main 
> intention is to avoid going over the network or something.
> 
> -- Ankur
> 

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