![]() ![]() If you are using Docker on MacOS or Windows 18.03+, you can connect connect to the magic hostname. ![]() Listening on INADDR_ANY (aka 0.0.0.0) or that are explicitly You will only be able to access host services that are either (a) Right thing depending on what other rules come before it. Iptables rules are ordered, and this rule may or may not do the This would permit access to any ports on the host from Docker Trick: # iptables -A INPUT -i docker0 -j ACCEPT ![]() You may need to modify the iptables rules on your host to permitĬonnections from Docker containers. Hostip=$(ip route show | awk '/default/ ') It's fairly easy to extract this IP address using a simple shell From inside the container, this will be your default route.įor example, on my system: $ ip addr show docker0ħ: docker0: mtu 1500 qdisc noqueue state DOWN group default When running Docker natively on Linux, you can access host services using the IP address of the docker0 interface. The alias will reset on every reboot so create a start-up script if necessary. To test you can run something like curl -X GET 123.123.123.123:3000 inside the container. Then just point your docker container to this IP and you can access the host machine! If it's listening on localhost 127.0.0.1 it will not accept the connection. ![]() Then make sure that you server is listening to the IP mentioned above or 0.0.0.0. You can bind whichever IP you want, just make sure you're not using it to anything else. To access host machine from the docker container you must attach an IP alias to your network interface. Linux support pending MacOS with earlier versions of Docker Docker for Mac v 17.12 to v 18.02 To enable this in Docker Compose on Linux, add the following lines to the container definition: extra_hosts:įor macOS and Windows Docker v 18.03 and above (since March 21st 2018) Use your internal IP address or connect to the special DNS name which will resolve to the internal IP address used by the host. (See below for Docker Compose configuration.) On Linux, add -add-host=:host-gateway to your Docker command to enable this feature. For all platforms Docker v 20.10 and above (since December 14th 2020) ![]()
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