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Discussion on: Docker Tip - How to use the host's IP Address inside a Docker container on macOS, Windows, and Linux

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ibejohn818 profile image
John Hardy

if you need the host.docker.internal (for example, nginx proxy to your host network), use an entrypoint script (IE: ENTRYPOINT['/entrypoint.sh'])

" install iputils-ping & iproute2 (or like packages)
" check if the host name resolves,
" if not, then get the gateway of the current network (which is the host)
" and set it in the containers host file

!/bin/sh

HOST_DOMAIN="host.docker.internal"
ping -q -c1 $HOST_DOMAIN > /dev/null 2>&1
if [ $? -ne 0 ]; then
HOST_IP=$(ip route | awk 'NR==1 {print $3}')
echo -e "$HOST_IP\t$HOST_DOMAIN" >> /etc/hosts
fi

Cheers ;-)