#!/bin/sh
# version 2.1
# simple script to quickly setup a dns server for cluster
# so you can find some error. plz report: clic-dev-public@mandrakesoft.com
#
##########
WORKDIR="/tmp/serverdns"
##########
CONFFILE="/etc/clusterserver.conf"
if [ ! -f ${CONFFILE} ]; then
echo "Cant find ${CONFFILE} !"
exit 1
fi
. ${CONFFILE}
##############################################################
##############################################################
## !!!!!! DONT TOUCH BEHIND THOSE LINE !!!!!
## (execpt you know waht you are doing.....)
##############################################################
##############################################################
# check server is not in RANGE ip
check_range_ip() {
echo " - Checking IP of SERVER in RANGE IP"
for i in `seq ${STARTNODE} ${FINISHNODE}` ; do
if [ "$i" = "${IPSERVERREVERSE}" ]; then
echo "!!!! WARNING !!!!"
echo "IP of DNS Server found twice in DNS !!"
echo "change the range ip of nodes in ${CONFFILE}"
exit 1
fi
done
if [ "${STARTNODE}" -ge "${FINISHNODE}" ]; then
echo "FINISHNODE is greater than STARTNODE !!"
echo "check ${CONFFILE}"
exit 1
fi
if [ "${FINISHNODE}" -gt "254" ]; then
echo "Be carefull ! IP out of 1 to 254 RANGE"
exit 1
fi
}
check_hostname() {
if [ ${NAMEOFSERVER} = "localhost" ]; then
echo "Strange name for a DNS server ?"
echo "cant configure a DNS server with such a name !"
echo "EXITING ! "
exit 1
fi
}
check_domain() {
if [ ${DOMAINNAME} = "localdomain" ]; then
echo "Strange DOMAIN for a DNS server ?"
echo "cant configure a DNS server with such a DOMAINNAME !"
echo "please edit /etc/sysconfig/network"
echo "and choose a corect DOMAINNAME"
echo "EXITING ! "
exit 1
fi
}
# check service named
start_service() {
CHECK_NAMED_STAT=`pidof named`
if [ -z "${CHECK_NAMED_STAT}" ]; then
echo " - Starting NAMED service:"
/etc/rc.d/init.d/named start
else
echo " - Restarting NAMED service:"
/etc/rc.d/init.d/named restart
fi
}
# check Work dir
check_workdir() {
if [ -d "${WORKDIR}" ]; then
echo " - ${WORKDIR} directory exist"
rm -rf ${WORKDIR}
mkdir ${WORKDIR}
else
echo " - Creating ${WORKDIR} directory"
mkdir ${WORKDIR}
fi
}
# check zone dir
check_zonedir() {
if [ -d "${ZONE_DIR}" ]; then
echo " - ${ZONE_DIR} directory exist"
else
echo " - Creating ${ZONE_DIR} directory"
mkdir -p ${ZONE_DIR}
fi
}
# create all typical file
create_typical_file() {
# create db.DOMAINNAME.hosts
cd ${WORKDIR}
echo " - Creating Typical files of a DNS server"
cat > ${WORKDIR}/db.DOMAINNAME.hosts <<EOF
\$TTL 3D
@ IN SOA NAMEOFSERVER.DOMAINNAME. root.NAMEOFSERVER.DOMAINNAME. (
$SERIAL ; Serial
8H ; Refresh
2H ; Retry
4W ; Expire
1D) ; Minimum TTL
TXT "TEXTINFO"
IN NS NAMEOFSERVER.DOMAINNAME.
localhost A 127.0.0.1
dns IN CNAME NAMEOFSERVER.DOMAINNAME.
NAMEOFSERVER.DOMAINNAME. IN A $IPSERVER
EOF
# create named.conf
cat > ${WORKDIR}/named.conf <<EOF
key mykey {
algorithm hmac-md5;
secret "$DNSKEY";
};
controls {
inet 127.0.0.1 port 953
allow { 127.0.0.1; } keys { mykey; };
};
options {
directory "$NAMED_DIR";
pid-file "$NAMED_DIR/named.pid";
allow-query { any; };
forwarders { IPOFFORWARDER; };
};
zone "localhost" {
type master;
file "zone/db.localhost";
};
zone "0.0.127.in-addr.arpa" {
type master;
file "zone/db.127.0.0";
};
zone "REVERSEIP.in-addr.arpa" {
type master;
file "zone/db.REVERSEIP.hosts";
forwarders { };
};
zone "DOMAINNAME" {
type master;
file "zone/db.DOMAINNAME.hosts";
forwarders { };
};
zone "." {
type hint;
file "zone/root.hints";
};
EOF
# create db.REVERSEIP.hosts
cat > ${WORKDIR}/db.REVERSEIP.hosts <<EOF
\$TTL 3D
@ IN SOA NAMEOFSERVER.DOMAINNAME. root.NAMEOFSERVER.DOMAINNAME. (
$SERIAL ; serial
10800 ; Refresh
3600 ; Retry
604800 ; Expire
86400 ) ; Minimum TTL
NS NAMEOFSERVER.DOMAINNAME.
$IPSERVERREVERSE IN PTR NAMEOFSERVER.DOMAINNAME.
EOF
# create root.hints
cat > ${WORKDIR}/root.hints <<EOF
; <<>> DiG 8.1 <<>> @A.ROOT-SERVERS.NET.
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10
;; flags: qr aa rd; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 13
;; QUERY SECTION:
;; ., type = NS, class = IN
;; ANSWER SECTION:
. 6D IN NS G.ROOT-SERVERS.NET.
. 6D IN NS J.ROOT-SERVERS.NET.
. 6D IN NS K.ROOT-SERVERS.NET.
. 6D IN NS L.ROOT-SERVERS.NET.
. 6D IN NS M.ROOT-SERVERS.NET.
. 6D IN NS A.ROOT-SERVERS.NET.
. 6D IN NS H.ROOT-SERVERS.NET.
. 6D IN NS B.ROOT-SERVERS.NET.
. 6D IN NS C.ROOT-SERVERS.NET.
. 6D IN NS D.ROOT-SERVERS.NET.
. 6D IN NS E.ROOT-SERVERS.NET.
. 6D IN NS I.ROOT-SERVERS.NET.
. 6D IN NS F.ROOT-SERVERS.NET.
;; ADDITIONAL SECTION:
G.ROOT-SERVERS.NET. 5w6d16h IN A 192.112.36.4
J.ROOT-SERVERS.NET. 5w6d16h IN A 198.41.0.10
K.ROOT-SERVERS.NET. 5w6d16h IN A 193.0.14.129
L.ROOT-SERVERS.NET. 5w6d16h IN A 198.32.64.12
M.ROOT-SERVERS.NET. 5w6d16h IN A 202.12.27.33
A.ROOT-SERVERS.NET. 5w6d16h IN A 198.41.0.4
H.ROOT-SERVERS.NET. 5w6d16h IN A 128.63.2.53
B.ROOT-SERVERS.NET. 5w6d16h IN A 128.9.0.107
C.ROOT-SERVERS.NET. 5w6d16h IN A 192.33.4.12
D.ROOT-SERVERS.NET. 5w6d16h IN A 128.8.10.90
E.ROOT-SERVERS.NET. 5w6d16h IN A 192.203.230.10
I.ROOT-SERVERS.NET. 5w6d16h IN A 192.36.148.17
F.ROOT-SERVERS.NET. 5w6d16h IN A 192.5.5.241
;; Total query time: 215 msec
;; FROM: roke.uio.no to SERVER: A.ROOT-SERVERS.NET. 198.41.0.4
;; WHEN: Sun Feb 15 01:22:51 1998
;; MSG SIZE sent: 17 rcvd: 436
EOF
# create db.127.0.0
cat > ${WORKDIR}/db.127.0.0 <<EOF
\$TTL 3D
@ IN SOA DOMAINNAME. root.DOMAINNAME. (
$SERIAL ; Serial
28800 ; Refresh
7200 ; Retry
604800 ; Expire
86400) ; Minimum TTL
NS NAMEOFSERVER.DOMAINNAME.
localhost IN A 127.0.0.1
EOF
cat > ${WORKDIR}/db.localhost <<EOF
\$TTL 3D
@ IN SOA DOMAINNAME. root.DOMAINNAME. (
$SERIAL ; Serial
28800 ; Refresh
7200 ; Retry
604800 ; Expire
86400) ; Minimum TTL
NS NAMEOFSERVER.DOMAINNAME.
1 IN PTR localhost.
EOF
# create rndc.conf
cat > ${WORKDIR}/rndc.conf <<EOF
/*
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: setup_dns_server,v 1.3 2002/12/04 10:39:23 uid620 Exp $ */
/*
* Sample rndc configuration file.
*/
options {
default-server localhost;
default-key "mykey";
};
server localhost {
key "mykey";
};
key "mykey" {
algorithm hmac-md5;
secret "$DNSKEY";
};
EOF
}
# save old conffile if exist
save_old_conf() {
echo " - Saving old confile: ${CONFFILE}"
if [ -f ${CONFFILE} ]; then
cp -f ${CONFFILE} ${CONFFILE}.${DATE}.sauv
fi
}
# generate list nodes for db.REVERSE.HOSTS
gen_reverse_list() {
for i in `seq ${STARTNODE} ${FINISHNODE}`
do echo "${i} IN PTR ${NODENAME}${i}.${DOMAINNAME}."
done
}
# generate list nodes for db.DOMAINNAME.hosts
gen_domain_list() {
for i in `seq ${STARTNODE} ${FINISHNODE}`
do
echo "${NODENAME}${i} IN A ${NORMIP}.${i}"
echo "n${i} IN CNAME ${NODENAME}${i}.${DOMAINNAME}."
done
}
# db.127.0.0
setup_127() {
echo " - Setting db.127.0.0 file"
CONF_127="${WORKDIR}/db.127.0.0"
perl -pi -e 's/DOMAINNAME/'$DOMAINNAME'/g' ${CONF_127}
perl -pi -e 's/NAMEOFSERVER/'$NAMEOFSERVER'/g' ${CONF_127}
}
# db.localhost
setup_localhost() {
echo " - Setting db.locahost file"
CONF_127="${WORKDIR}/db.localhost"
perl -pi -e 's/DOMAINNAME/'$DOMAINNAME'/g' ${CONF_127}
perl -pi -e 's/NAMEOFSERVER/'$NAMEOFSERVER'/g' ${CONF_127}
}
# named.conf
setup_named() {
CONF_NAMED="${WORKDIR}/named.conf"
echo " - Setting named.conf file"
if [ -z ${IPOFFORWARDER} ]; then
perl -pi -e 's/IPOFFORWARDER\;//g' ${CONF_NAMED}
else
perl -pi -e 's/IPOFFORWARDER/'$IPOFFORWARDER'/g' ${CONF_NAMED}
fi
perl -pi -e 's/REVERSEIP/'$REVERSEIP'/g' ${CONF_NAMED}
perl -pi -e 's/DOMAINNAME/'$DOMAINNAME'/g' ${CONF_NAMED}
#perl -pi -e 's/DNSKEY/'$DNSKEY'/g' ${CONF_NAMED}
}
# update dnskey in rndc file
setup_rndc() {
CONF_RNDC="${WORKDIR}/rndc.conf"
# perl -pi -e 's/DNSKEY/'$DNSKEY'/g' ${CONF_NAMED}
}
# db.REVERSEIP.hosts
setup_dbreverse() {
CONF_REVERSE="${WORKDIR}/db.${REVERSEIP}.hosts"
echo " - Setting db.${REVERSEIP}.hosts file"
cp -f ${WORKDIR}/db.REVERSEIP.hosts ${WORKDIR}/db.${REVERSEIP}.hosts
perl -pi -e 's/DOMAINNAME/'$DOMAINNAME'/g' ${CONF_REVERSE}
perl -pi -e 's/REVERSEIP/'$REVERSEIP'/g' ${CONF_REVERSE}
perl -pi -e 's/NAMEOFSERVER/'$NAMEOFSERVER'/g' ${CONF_REVERSE}
echo " - Generating list nodes for db.${REVERSE}.HOSTS"
gen_reverse_list >> ${CONF_REVERSE}
}
# db.DOMAINNAME.hosts
setup_dbdomain() {
CONF_DOMAIN="${WORKDIR}/db.${DOMAINNAME}.hosts"
echo " - Setting db.${DOMAINNAME}.hosts file"
cp -f ${WORKDIR}/db.DOMAINNAME.hosts ${WORKDIR}/db.${DOMAINNAME}.hosts
perl -pi -e 's/DOMAINNAME/'$DOMAINNAME'/g' ${CONF_DOMAIN}
perl -pi -e 's/NAMEOFSERVER/'$NAMEOFSERVER'/g' ${CONF_DOMAIN}
perl -pi -e 's/TEXTINFO/'$TEXTINFO'/g' ${CONF_DOMAIN}
# perl -pi -e 's/IPSERVER/'$IPSERVER'/g' ${CONF_DOMAIN}
echo " - Generating list nodes for db.${DOMAINNAME}.HOSTS"
gen_domain_list >> ${CONF_DOMAIN}
}
# configuration of /etc/resolv.conf
setup_resolv() {
echo " - Setting resolv.conf file"
cat > /etc/resolv.conf <<EOF
domain $DOMAINNAME
search $DOMAINNAME $ADDSEARCH
nameserver $IPSERVER
EOF
}
setup_hosts() {
echo " - Setting hosts"
cat > /etc/hosts <<EOF
127.0.0.1 localhost.localdomain localhost
$IPSERVER $HOSTNAME
EOF
}
# install file in correct place
install_file() {
echo " - Installing files in correct place"
CONFFILE="/etc/named.conf"
save_old_conf
cp -f ${CONF_NAMED} /etc/named.conf
CONFFILE="/etc/hosts"
save_old_conf
CONFFILE="${ZONE_DIR}/db.${DOMAINNAME}.hosts"
save_old_conf
cp -f ${CONF_DOMAIN} ${ZONE_DIR}/db.${DOMAINNAME}.hosts
CONFFILE="${ZONE_DIR}/db.${REVERSEIP}.hosts"
save_old_conf
cp -f ${CONF_REVERSE} ${ZONE_DIR}/db.${REVERSEIP}.hosts
cp -f ${WORKDIR}/root.hints ${ZONE_DIR}/root.hints
CONFFILE="${ZONE_DIR}/db.127.0.0"
save_old_conf
cp -f ${CONF_127} ${ZONE_DIR}/db.127.0.0
CONFFILE="${ZONE_DIR}/db.localhost"
save_old_conf
cp -f ${CONF_127} ${ZONE_DIR}/db.localhost
CONFFILE="/etc/rndc.conf"
save_old_conf
cp -f ${WORKDIR}/rndc.conf /etc/rndc.conf
}
# launch all functions
launch_all() {
check_range_ip
check_hostname
check_domain
check_workdir
check_zonedir
create_typical_file
setup_named
setup_dbdomain
setup_dbreverse
setup_127
setup_localhost
setup_rndc
setup_resolv
setup_hosts
install_file
}
# check config of DNS
check_all() {
echo " - Checking config file"
named-checkconf
echo
named-checkzone db.127.0.0 /var/named/zone/db.127.0.0
echo
named-checkzone db.localhost /var/named/zone/db.localhost
echo
named-checkzone ${REVERSEIP} /var/named/zone/db.${REVERSEIP}.hosts
echo
named-checkzone ${DOMAINNAME} /var/named/zone/db.${DOMAINNAME}.hosts
}
####################################################
# main program
####################################################
echo
echo " Setting up DNS server with default configuration !"
echo " Look in ${CONFFILE} to adjust DNS config"
echo
echo " Using those values to setup the DNS:"
echo " |-----------------------------------------------------------"
echo " | Hostname | ${NAMEOFSERVER}"
echo " |-----------------------------------------------------------"
echo " | IP of DNS server: | ${IPSERVER}"
echo " |-----------------------------------------------------------"
echo " | Domainname: | ${DOMAINNAME}"
echo " |-----------------------------------------------------------"
echo " | Forwarder: | ${IPOFFORWARDER}"
echo " |-----------------------------------------------------------"
echo " | IP range in DNS: | ${NORMIP}.${STARTNODE} - ${NORMIP}.${FINISHNODE}"
echo " |-----------------------------------------------------------"
echo " | First node: | ${NODENAME}${STARTNODE}"
echo " |-----------------------------------------------------------"
echo " | Last node: | ${NODENAME}${FINISHNODE}"
echo " |-----------------------------------------------------------"
echo " | File of DNS server: | ${ZONE_DIR}"
echo " |-----------------------------------------------------------"
echo
sleep 3
launch_all
check_all
start_service
