Simple dynamic DNS server for Docker environment (mainly those with only one host) with single zone automatically generated from information about running containers by docker-gen.

Can be used as very simple implementation of service discovery. Still probably better than Docker links mechanism, because they are everything but dynamic :)

Usage:

docker run \
  -p 172.17.42.1:53:53 \
  -p 172.17.42.1:53:53/udp \
  -e DNS_ROOT=docker.local \
  -e DNS_ENV=
  fullvent/docker-dns

Environment variables:

• DNS_ROOT - domain name used for generated DNS zone, default is docker.local
• DNS_ENV - environment part of generated DNS zone records, default is empty

Multiple records are generated for each running container:

• <container name>
• <container name>.<root domain>
• <container hostname including domain>
• when DNS_ENV is specified:
  • <container name>.<environment>.<root domain>
  • <container name>.<container image repository>.<environment>.<root domain>