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GitNamed

GitNamed is a project that manage name server by git.

Features

  • A frame to manage your DNS server(s)
  • Put all your DNS data into git, and you have a revision from which you can backup and restore easily
  • It's easy to manage your DNS resource records, just edit and commit
  • DNS manager needs no OS account on the DNS server, only a git account
  • Using hooks to validate syntax of zone file when commting
  • Using hooks to auto increcement serial of SOA when commting

Overview

GitNamed is a project that manages your name server(s) by git. You can clone the git repo to any workstation, edit zone file, commit and push the changes. The data will be pushed to the master and slave name server on the fly.

You don't need to touch name server any more, you have all your dat in a git repo with a history of your changes.

If you need add a new zone, just create a new file in zones directory, zone file name should be the domain name.

vi zones/example.com
git add zones/example.com
git commit -m "add example.com"

Here is a example zone file:

$TTL 3600
@ 		IN	SOA	ns1.example.com. sysadm.example.com. (
			2012040812	; serial
			7200		; refresh
			1800		; retry
			1209600		; expire
			300 )		; minimum
		IN	NS	ns1.example.com.
		IN	NS	ns2.example.com.
		IN	A	61.160.235.206
$ORIGIN example.com.
ns1     172800    IN      A       61.160.235.206
ns2     172800    IN      A       61.160.235.203
www	IN	A   61.160.235.206
test	IN	A   61.160.235.200
*	IN	CNAME   example.com.

Any one whos has the access right of git repo can manage the name server now.

It's been tested on CentOS 6.2 and Debian 6.0.

If you find any problems, please contact me:

email: [email protected]
weibo: http://weibo.com/refactor
blog: http://www.pubyun.com/blog
github: https://github.com/pubyun/gitnamed

Install Guide

enviroment

  • install bind on master and slave dns server
CentOS:
#yum -y install bind
Debian:
#aptitude -y install bind9
Mac OS X:
$brew install bind

Setup master DNS server

  • get source code
#git clone git://github.com/pubyun/gitnamed.git /home/named
#cd /home/named
  • modify IP of domain name server in config file, and generate key to transfer zone from master to slave:
#dnssec-keygen -a hmac-md5 -b 128 -n HOST master2slave
#vi script/settings.py
  • runing setup file:
#./script/setup.py
  • start named
#service named start

setup a private git Repo

I recommend gitolite:
https://github.com/sitaramc/gitolite

  • add a repo to it, here is part of conf/gitolite.conf:
repo    gitnamed
        RW     =   refactor
        R      =   gitnamed

NOTE:

please use the private key just generated in .ssh/id_rsa.pub for gitolite private key.

your private repo url is something like:

ssh://[email protected]/gitnamed.git
  • push code to your private repo:
#su - named
$git remote add hub ssh://[email protected]/gitnamed.git
$git push hub master

now you can test git pull:

#su - named
$git pull hub master
Already up-to-date.

Setup slave DNS server

  • copy code

use a tool like rsync to copy /home/named/ to slave dns server, it must be same directory as master dns.

  • runing setup file:
#./script/setup.py slave
  • start named
#service named start

enable sync master to slave

  • setup authorized_keys on all your slave dns
#su - named
$vi .ssh/authorized_keys 

# enable push from master name server
from="61.160.235.206",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEApclazU9YfjfahDYT2692PSWYvjTOoFMTfgyTRpN/c/bq+GNPrC9hBunpVrhHyQ439t3Zj4VIEweY4AOTRstf94+IRp7BvYC8etb4x+M7oPbsa0JQGnfFIYrzpo7e2+t3+i1VfRgO4OtqrQTwuB45a+8zL8uHV6rK1vbDNUKdfiO7NRmCQoelhWgREUJkhYn00NCQyUUhcBB+MtP4mk4vHHKT2ZdAU/DeNL5cKbet90t871enIrfOMxkIRiCRA5SLJVQp9vWlmfo2Da79DVjWohKIrngF6ydJ7zJd3Izw0bVt7ZoawvTfQhuIPdAd6bJ95kOYzoJbFjin0wY8ZF6Qkw==

run syndns.py script on master dns server to test

#su - named
$ /home/named/script/syndns.py 
Already up-to-date.
server reload successful
reloading 61.160.235.203
named.conf.slave                                                                                                                               100%  150     0.2KB/s   00:00    
server reload successful

enable push from git to master

  • setup authorized_keys on all master dns
#su - named
$vi .ssh/authorized_keys 
# enable push from git server
from="61.160.235.208",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty,command="/home/named/script/syndns.py"  ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEApclazU9YfjfahDYT2692PSWYvjTOoFMTfgyTRpN/c/bq+GNPrC9hBunpVrhHyQ439t3Zj4VIEweY4AOTRstf94+IRp7BvYC8etb4x+M7oPbsa0JQGnfFIYrzpo7e2+t3+i1VfRgO4OtqrQTwuB45a+8zL8uHV6rK1vbDNUKdfiO7NRmCQoelhWgREUJkhYn00NCQyUUhcBB+MtP4mk4vHHKT2ZdAU/DeNL5cKbet90t871enIrfOMxkIRiCRA5SLJVQp9vWlmfo2Da79DVjWohKIrngF6ydJ7zJd3Izw0bVt7ZoawvTfQhuIPdAd6bJ95kOYzoJbFjin0wY8ZF6Qkw==
  • test pushing data to master:

on git server, you can trigger the script on master dns server:

$/usr/bin/ssh -i /home/git/.ssh/gitnamed [email protected] sleep 1
Already up-to-date.
server reload successful
server reload successful

add script to hooks:

$vi  ~git/repositories/gitnamed.git/hooks/post-receive
/usr/bin/ssh -i /home/git/.ssh/gitnamed [email protected] sleep 1

add pre-commit hook to check zone file and auto increment serial

ln -s ../../script/check.sh .git/hooks/pre-commit

you should put the serial of SOA in separated line and end it with a comment "; serial":

$TTL 3600
@ 		IN	SOA	ns1.example.com. sysadm.example.com. (
			2012040812	; serial
			7200		; refresh
			1800		; retry
			1209600		; expire
			300 )		; minimum

it works now

you can clone the git repo to any workstation, edit zone file, commit and push it.
the data will push to the master and slave name server now.