PowerDNS Authoritative Server - MySQL Enabled Docker Image

The PowerDNS Auth Server is a powerful, authoritative DNS server with several exciting features. A full description can be found on the project website.

Credits

This image was heavily based on the great work of Peter Schiffer.

The reason for creating another version of the image, was:

• To use the upstream packages from the PowerDNS Repositories.
• To use a base image with a longer lifecycle.

The Image

Docker image with PowerDNS Authoritative Server.

Repositories

• Docker: https://hub.docker.com/r/tmuncks/pdns-server/
• Github: https://github.com/tmuncks/docker-pdns-server/

Usage

The image is MySQL enabled, so needs an external MySQL server to function.

Environment variables

ENV variables can be used for configuration:

(name=value)

PDNS_gmysql_host=mysql
PDNS_gmysql_port=3306
PDNS_gmysql_user=root
PDNS_gmysql_password=passw0rd
PDNS_gmysql_dbname=powerdns

If linked with official mariadb image with alias mysql, the connection can be automatically configured, so you don't need to specify any of the above.

The database is automatically created if missing and initialized if tables are missing. This can be avoided by placing SKIP_DB_CREATE=true in the list of ENV variables.

The PowerDNS server is configurable via env vars. Every variable starting with PDNS_ will be inserted into the default /etc/powerdns/pdns.conf config file in the following way:

• Prefix PDNS_ will be stripped
• Every _ will be replaced with -

Example from above mysql config; PDNS_gmysql_host=mysql will become gmysql-host=mysql in /etc/powerdns/pdns.conf file. This way, you can configure PowerDNS server any way you need, within a docker run command.

There is also a SUPERMASTER_IPS env var supported, which can be used to configure supermasters for slave dns server. Docs. Multiple ip addresses separated by space should work.

Mounting configuration file

Another option is to mount a full PowerDNS Authoritative Server configuration on /etc/powerdns/pdns.conf in the container. In this case, all PDNS_ environment variables will be ignored.

Reference

You can find here all available settings.

Examples

Master server with API enabled and with one slave server configured:

docker run -d -p 53:53 -p 53:53/udp --name pdns-master \
  --hostname ns1.example.com --link mariadb:mysql \
  -e PDNS_master=yes \
  -e PDNS_api=yes \
  -e PDNS_api_key=secret \
  -e PDNS_webserver=yes \
  -e PDNS_webserver_address=0.0.0.0 \
  -e PDNS_webserver_password=secret2 \
  -e PDNS_version_string=anonymous \
  -e PDNS_default_ttl=1500 \
  -e PDNS_allow_axfr_ips=172.5.0.21 \
  -e PDNS_only_notify=172.5.0.21 \
  tmuncks/pdns-server

Slave server with supermaster:

docker run -d -p 53:53 -p 53:53/udp --name pdns-slave \
  --hostname ns2.example.com --link mariadb:mysql \
  -e PDNS_gmysql_dbname=powerdnsslave \
  -e PDNS_slave=yes \
  -e PDNS_version_string=anonymous \
  -e PDNS_disable_axfr=yes \
  -e PDNS_allow_notify_from=172.5.0.20 \
  -e SUPERMASTER_IPS=172.5.0.20 \
  tmuncks/pdns-server