在RHEL6中用BASH脚本搭建DNS域名解析服务器

#!/bin/bash
# Just need to reset variable "MYIP" and "MYDOMAIN" to yourself.

MYIP="192.168.80.6"
MYDOMAIN="example.com"
export MYIP MYDOMAIN
#--------------------------------------
# Don't change anything in the below,
# unless you know what you are doing.

#--------------------------------------
# Install Packages.
#--------------------------------------
yum -y install bind bind-chroot

#--------------------------------------
# Modify "/etc/named.conf"
#--------------------------------------
sed -i 's/127.0.0.1;/any;/g' /etc/named.conf
sed -i 's/localhost;/any;/g' /etc/named.conf

#--------------------------------------
# Modify "/etc/named.rfc1912.zones"
#--------------------------------------
grep "$MYDOMAIN" /etc/named.rfc1912.zones > /dev/null
if [ $? -ne 0 ]; then
cat >> /etc/named.rfc1912.zones << _EOF_
zone "$MYDOMAIN" IN {
type master;
file "$MYDOMAIN.zone";
allow-update { none; };
};
zone "$(echo $MYIP | awk -F"." '{print $3"."$2"."$1}').in-addr.arpa" IN {
type master;
file "$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}').zone";
allow-update { none; };
};
_EOF_
fi

#--------------------------------------
# Create forward and backward resolve file
#--------------------------------------
/bin/cp -p /var/named/named.localhost /var/named/"$MYDOMAIN".zone
/bin/cp -p /var/named/named.localhost /var/named/"$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}')".zone

cat > /var/named/"$MYDOMAIN".zone << _EOF_
\$TTL 1D
@   IN SOA  $MYDOMAIN. rname.invalid. (
0   ; serial
1D  ; refresh
1H  ; retry
1W  ; expire
3H )    ; minimum
NS      $MYDOMAIN.
$MYDOMAIN.      A       $MYIP
www             A       $MYIP
ftp             A       $MYIP
$MYDOMAIN.      MX 5    mail.$MYDOMAIN.
mail            A       $MYIP
_EOF_

cat > /var/named/"$(echo $MYIP | awk -F"." '{print $1"."$2"."$3}')".zone << _EOF_
\$TTL 1D
@ IN SOA  $MYDOMAIN. rname.invalid. (
0   ; serial
1D  ; refresh
1H  ; retry
1W  ; expire
3H )    ; minimum
NS      $MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     $MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     www.$MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     ftp.$MYDOMAIN.
$(echo $MYIP | awk -F"." '{print $4}')  PTR     mail.$MYDOMAIN.
_EOF_

#--------------------------------------
# Modify "/etc/resolv.conf"
#--------------------------------------
cat > /etc/resolv.conf << _EOF_
search $MYDOMAIN
nameserver $MYIP
_EOF_

#--------------------------------------
# Restart DNS service
#--------------------------------------
/etc/init.d/named restart