Docker Compose extra_hosts: host-gateway, Syntax and Fixes (2026)
extra_hosts in Docker Compose: both syntaxes, what host-gateway resolves to and how to change it, how to check /etc/hosts, and the fix for connection refused on Linux.
extra_hosts in Docker Compose: both syntaxes, what host-gateway resolves to and how to change it, how to check /etc/hosts, and the fix for connection refused on Linux.