Docker Compose extra_hosts: host-gateway & examples
Reference for extra_hosts in Docker Compose. Map host-gateway to reach host.docker.internal on Linux, mock DNS, use IPv6, and fix common errors.
2 docs tagged with "dns"
View all tagsDocker Compose Networks: Service Discovery and Isolation (2026)
How networks work in Docker Compose — the default network, service name DNS, custom and external networks, isolating a database, and why one container cannot reach another.