Managing ports within Docker
reddit / selfhosted

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Tr4shM0nk3y · 2023-12-19 13:51

You'd use a reverse proxy to route traffic depending on incoming
request to containername:port, that way you can have infinite web-
based things running without problems.

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YYCwhatyoudidthere · 2023-12-19 15:47

I probably have one of everything based on peculiarities of the app,
but in general I 81:80, 82:80, 83:80. TLS is similarly aligned
81:80/8441:443, 82:80/8442:443.

I user docker-compose so it is easy to look up what it was set at, but
with a reverse proxy in place I rarely need to remember the specific
docker exposed ports.

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KALELSUPRMN · 2023-12-20 03:45

I just keep an excel spreadsheet of how I have everything mapped and
make sure to keep up with it.

* Containers on my gluetun-vpn network get assigned ports starting in
the 7000 range for the host port and then whatever it needs to be
mapped to on the container side
* Containers on a bridge network get assigned ports starting in the
9000 range
   * for example, dozzle gets 9000 on the host side and mapped to 8080
in the container
   * homer gets 9001 mapped to 8080
   * so on and so forth
* I also have 4 vlans with dedicated NICs and for any container that's
on a macvlan network assigned to one of those NICs, they just get a
static IP and use their default ports since there's no need to really
remap those.

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unixuser011 · 2023-12-20 08:22

>I also have 4 vlans with dedicated NICs and for any container that's
on a macvlan network assigned to one of those NICs, they just get a
static IP and use their default ports since there's no need to really
remap those.

That's kinda what I'm aiming for. I'm doing a complete rebuild in
summer 2024 and I'm going to create a dedicated MACVLAN docker subnet
and assign an IP to each separate container - but for now, I'll keep
everything in a spreadsheet and assign unused ports over 65535