This is a follow up to Start: Support hostnames and domains in PIHOLE_DNS_ by networkException · Pull Request #816 · pi-hole/docker-pi-hole · GitHub #docker
Currently the docker configuration does not allow for a hostname or domain in the pihole dns configuration. Technically DNS servers are never domains but in some cases the ip of a domain might want to be used as the DNS server. In particular a docker-compose stack would benefit from this feature:
services:
pihole:
image: pihole/pihole
hostname: pihole
depends_on:
- dnscrypt
ports:
- 53:53/udp
environment:
PIHOLE_DNS_: dnscrypt
dnscrypt:
image: #...
By resolving the ip of "dnscrypt" on startup, pihole could now use the dnscrypt container as a DNS server.