gdnsd Agent backend

User documentation

This page documents the Agent backend for gdnsd.

The agent runs on the same host as the resolver. It receives DNS messages from Mini DNS using private DNS OPCODEs and classes and creates/updates/deletes zones on gdnsd using zone files under the gdnsd configuration directory.

The backend supports gdnsd from version 2.0

gdnsd documentation

Setting up gdnsd on Ubuntu Vivid

Run as root:

apt-get update
apt-get install gdnsd

Configuring gdnsd

Assuming gdnsd has been freshly installed on the system, run as root:

# Monitor syslog during the next steps
tail -f /var/log/syslog

# config check should be successful
/usr/sbin/gdnsd checkconf

# Start the daemon if needed
service gdnsd status
service gdnsd start

# gdnsd should be listening on TCP and UDP ports
netstat -lnptu | grep '/gdnsd'

# Test the daemon: it should respond with "gdnsd"
dig @ CH TXT +short

Configure the “service.agent” and “backend.agent.gdnsd” sections in /etc/designate/designate.conf

Look in designate.conf.example for more complete examples

backend_driver = gdnsd
# Place here the MiniDNS ipaddr and port (not the agent itself)
masters =

#gdnsd_cmd_name = gdnsd
#confdir_path = /etc/gdnsd
#query_destination =

Ensure that the “zones” directory under “confdir_path” (default /etc/gdnsd) is readable and writable by the system user running the Designate Agent

Create an agent pool:

# Fetch the existing pool(s) if needed
designate-manage pool generate_file --file /tmp/pool.yaml
# Edit the file (see below) and reload it as:
designate-manage pool update --file /tmp/pool.yaml

The “targets” section in pool.yaml should look like:

- description: gdnsd agent
  - host: <MiniDNS IP addr>
    port: 5354
  options: {}
  - host: <Agent IP addr>
    port: 5358
  type: agent

Start the Designate Agent. You should see log messages similar to:

2016-05-03 15:13:38.193 INFO designate.backend.agent_backend.impl_gdnsd [-] gdnsd command: 'gdnsd'
2016-05-03 15:13:38.193 INFO designate.backend.agent_backend.impl_gdnsd [-] gdnsd conf directory: '/etc/gdnsd'
2016-05-03 15:13:38.194 INFO designate.backend.agent_backend.impl_gdnsd [-] Resolvers: ['']