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I was reading this answer: Increasing the maximum number of tcp/ip connections in linux

My setup is as follows. I have multiple containers, each with their own IP, and I communicate to a process inside them through tcp (its all same machine). As such, all the processes use the same port, but have their own unique IP. Does that mean I will not run into the tcp limitations described above (since those seem to be port-based?)

Controller Process -> container 1 [with unique IP, port X]
                   -> container 2 [with unique IP, port X]
                   -> container 3 [with unique IP, port X]
                   -> container 5 [with unique IP, port X]

Apologies if this question is rudimentary phrased, new to some of this stuff. Happy to provide any additional info.

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Francisco Ryan Tolmasky I
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  • How would using different 'containers', by which I assume you mean VMs, relieve an FD shortage in the server? – user207421 Aug 10 '15 at 23:03
  • They are Linux containers, so not VMs. (Docker). I am not sure how it would anything, I'm just explaining that in my setup the limitation is not ports (so theoretically not affected by ip_local_port_range?). As such, I'm curious if the tcp limitation is a port count one or a deeper one (such as fd) – Francisco Ryan Tolmasky I Aug 10 '15 at 23:21

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