This is created as an external network that different docker-compose files reference. In my use case, I have a number of containers linked to a docker network which traefik acts as a reverse proxy in front of. Setting a Fixed IP Address for a Docker Container This from address has to be a valid IP address for the interface that is connected to our docker container, unfortunately this means the container needs to have a fixed IP address assigned to it. We need to change this to the broadcast address of the subnet the destination device for the Wake-on-Lan packet is in. If the from attribute is not set then the address will be ignored and the library will perform its default behaviour of calculating the broadcast address for each network interface. This is passed directly to the wakeonlan library. In our scenario one of these network interfaces is a docker bridge network as opposed to an external network, but the same controls apply. The controls which prevent a broadcast packet received on one network interface being sent to another are part of the linux kernel.
Docker set mac address license#
Sending magic packet to 192.168.0.255 with broadcast 192.168.0.255 MAC aa:bb:cc:dd:ee:ff port 9Īllowing Broadcast Traffic to be Re-Broadcast I was using this to run the RLM License server too, which uses the host MAC address to validate licenses that it serves out over a network. :~ $ docker run -rm -network=core_traefik-backend wol -b 192.168.0.255 aa:bb:cc:dd:ee:ff
In this example I had attached tcpdump to the interface the docker container was in directly, just to verify the approach worked. Listening for Broadcast Trafficįor the purposes of investigating this I did not want to be turning my TV on and off repeatedly, so I used tcpdump to inspect the network traffic that used the ports that can be used for Wake-on-Lan packets.
Docker set mac address how to#
I have now found how to configure this to work. This depends on Wake-on-Lan, which by default only works in the same network subnet, something which is not true unless the docker container is ran in host network mode. All the features of the plugin were functioning as expected, with the exception of powering on the TV. Running HomeBridge on Docker without Host Network Mode - Additional AccessoriesĬontinuing on from the previous post in this series, I have been doing a bit more investigation into solving the issues I was having with the homebridge-samsung-tizen plugin. Running HomeBridge on Docker without Host Network Mode
Docker set mac address series#
This post is part 3 of the series "Running HomeBridge on Docker without Host Network Mode".
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