Geo DNS used to divide the traffic of a website to multiple server easily manage more network traffic.
Redirect visitors dynamically to specific server based on country of origin . Assume that we have multiple servers located in different countries and onserver located in US which has configured Geo DNS. Users requesting from different countries all other requests forward onto a server, due to all request being served by the nearest server.
Simple Geo DNS Structure,
The below steps to install and configure Geo DNS, don’t confuse to below installation steps because I have explained errors and solutions which has faced while installation.
Step 1 :
Install Bind with GeoDNS Patch:
Download the GeoIP-1.4.8.tar.gz and extarct it
# cd /root/
# wget http://geolite.maxmind.com/download/geoip/api/c/GeoIP-1.4.8.tar.gz
# tar xf GeoIP-1.4.8.tar.gz
# cd GeoIP-1.4.8
# ./configure --prefix=/usr/local/geoip
# wget http://geolite.maxmind.com/download/geoip/api/c/GeoIP-1.4.8.tar.gz
# tar xf GeoIP-1.4.8.tar.gz
# cd GeoIP-1.4.8
# ./configure --prefix=/usr/local/geoip
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in `/root/download/GeoIP-1.4.8':
configure: error: no acceptable C compiler found in $PATH
Solution:
Install GCC packages and try to configure again
# yum install gcc
Try Again,
# ./configure --prefix=/usr/local/geoip
configure: error: Zlib header (zlib.h) not found. Tor requires zlib to build.
You may need to install a zlib development package.
To resolved this error install zlib development package using yum command
# yum install zlib-devel.x86_64
# yum install gd
# yum install gd
Try Again,
# ./configure --prefix=/usr/local/geoip
# make && make install
# make && make install
Step 2 :
Next, download GeoDNS patch file for Bind using wget command and extract archive file
# wget http://www.caraytech.com/geodns/bind-9.4.1-geodns-patch.tar.gz
# tar xf bind-9.4.1-geodns-patch.tar.gz
# tar xf bind-9.4.1-geodns-patch.tar.gz
Download the Bind 9.4.1-P1 because we have downloaded same patch version,
# wget http://ftp.isc.org/isc/bind9/9.4.1-P1/bind-9.4.1-P1.tar.gz
# tar xf bind-9.4.1-P1.tar.gz
# tar xf bind-9.4.1-P1.tar.gz
Step 3:
Next, configure patch file,
# patch -p0 < bind-9.4.1-geodns-patch/patch.diff
-bash: patch: command not found
If the “patch” command was not found install patch using yum command,
# yum install patch
Try Again,
# patch -p0 < bind-9.4.1-geodns-patch/patch.diff
patching file bind-9.4.1-P1/lib/dns/acl.c
patching file bind-9.4.1-P1/lib/dns/include/dns/acl.h
patching file bind-9.4.1-P1/lib/isccfg/aclconf.c
Step 4 :
Configure GeoIP installation in /usr/local/geoip/,
# cd bind-9.4.1-P1
# CFLAGS="-I/usr/local/geoip/include" LDFLAGS="-L/usr/local/geoip/lib -lGeoIP" ./configure --prefix=/usr/local/bind
# CFLAGS="-I/usr/local/geoip/include" LDFLAGS="-L/usr/local/geoip/lib -lGeoIP" ./configure --prefix=/usr/local/bind
checking for C compiler default output file name... a.out
checking whether the C compiler works... configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details.
To fix this error:
Open ld.so.conf file add the below line and save it
# vim /etc/ld.so.conf
/usr/local/geoip/lib
# ldconfig
Try again,
# CFLAGS="-I/usr/local/geoip/include" LDFLAGS="-L/usr/local/geoip/lib -lGeoIP" ./configure --prefix=/usr/local/bind
# make && make install
# make && make install
. . .
/bin/sh ./mkinstalldirs /usr/local/bind/bin \
/usr/local/bind/var/run /usr/local/bind/etc
mkdir /usr/local/bind/var
mkdir /usr/local/bind/var/run
mkdir /usr/local/bind/etc
/usr/bin/install -c isc-config.sh /usr/local/bind/bin
Finally Geo DNS installation completed.
How to configure Geo DNS,
Step 1 :create a key file "/etc/rndc.key" and add below line
key "rndc-key" {
algorithm hmac-md5;
secret "LYjlqvJ,h9m6Gf9ZK1g3w6tQJ9j6H$9j,gMlpYPeGUm";
};
Step 2 :
We need to configure through the named.conf file, so create a file named.conf within /usr/local/bind/etc/ and add below config lines,
# cd /usr/local/bind/etc/
# vim named.conf
# vim named.conf
include "/etc/rndc.key";
#listen-on-v6 { none; };
#controls {
# inet 127.0.0.1 allow { localhost; } keys { "rndc-key"; };
#};
options {
directory "/var/named"; // the default
pid-file "/var/run/named.pid";
dump-file "data/cache_dump.db";
statistics-file "data/named_stats.txt";
allow-transfer {"none";};
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
view "INDIA" {
match-clients { country_IN; };
recursion no;
zone "thelinuxfaq.com" {
type master;
file "/var/named/ thelinuxfaq.com.india.db ";
};
};
view "US" {
match-clients { country_US; };
recursion no;
zone " thelinuxfaq.com" {
type master;
file "/var/named/ thelinuxfaq.com.us.db";
};
};
view "other" {
match-clients { any; };
recursion no;
zone " thelinuxfaq.com" {
type master;
file "/var/named/thelinuxfaq.com.db";
};
};
Step 3:
We need to create dns zone for specific domain name this example configure INDIA, US and others, Assume that the ip addresses are,
India - 192.168.1.1
US – 192.168.2.2
# cd /var/named
# touch thelinuxfaq.com.india.db
# vim /var/named/ thelinuxfaq.com.india.db
# touch thelinuxfaq.com.india.db
# vim /var/named/ thelinuxfaq.com.india.db
; Zone file for thelinuxfaq.com
$TTL 14400
thelinuxfaq.com. 86400 IN SOA ns1.nameserver.com. config.thelinuxfaq.com. (
2014021700 ;Serial Number
86400 ;refresh
7200 ;retry
3600000 ;expire
86400 )
@ 14400 IN NS ns1.nameserver.com.
@ 14400 IN NS ns2.nameserver.com.
thelinuxfaq.com. 14400 IN A 192.168.1.1
www 14400 IN CNAME thelinuxfaq.com.
mail 14400 IN A 192.168.1.1
thelinuxfaq.com. 14400 IN MX 0 mail.thelinuxfaq.com.
Also configure for US,
# touch thelinuxfaq.com.india.db
# vim /var/named/ thelinuxfaq.com.us.db
# vim /var/named/ thelinuxfaq.com.us.db
; Zone file for thelinuxfaq.com
$TTL 14400
thelinuxfaq.com. 86400 IN SOA ns1.nameserver.com. config.thelinuxfaq.com. (
2014021700 ;Serial Number
86400 ;refresh
7200 ;retry
3600000 ;expire
86400 )
@ 14400 IN NS ns1.nameserver.com.
@ 14400 IN NS ns2.nameserver.com.
thelinuxfaq.com. 14400 IN A 192.168.2.2
www 14400 IN CNAME thelinuxfaq.com.
mail 14400 IN A 192.168.2.2
thelinuxfaq.com. 14400 IN MX 0 mail.thelinuxfaq.com.
Finally configure to others countries and both IP Address add in A Record
After completed installation and configuration can start named service,
Step 4 :
Start:
# /usr/local/bind/sbin/named -s
Check the named service Status:
# pgrep -f named
3743# ps aux | grep named
root 3743 0.0 1.3 16284 14240 ? Ss Oct28 0:08 /usr/local/bind/sbin/named -s
root 21908 0.0 0.0 4040 704 pts/0 R+ 11:00 0:00 grep named
Do you want to stop dns service,
# pkill -9 named
Check the logs status:
# tail -f /var/log/messages
Nov 5 11:00:55 namedserver named[21911]: client 192.168.0.1#38959: view US: received notify for zone 'thelinuxfaq.com'
Nov 5 11:00:55 namedserver named[21911]: client 192.168.0.1#38959: view US: received notify for zone 'thelinuxfaq.com'
Nov 5 11:00:55 namedserver named[21911]: client 192.168.0.1#38959: view US: received notify for zone 'thelinuxfaq.com'
I hope, you have understood all the steps, If you will face any issue just drop a comments.
Comments (0)