3 # this set of functions serve the main purpose of adding new domains or subdomains to the bind9 DNS server on the current host.
4 # it is currently highly specific to running a bunch of domains on a linux VM, where the VM has one IP address.
5 # note that bind 'named' must already be configured.
6 # also, it is assumed that if a subdomain is being added, then the containing domain has already been configured and is
7 # configured in a file similar to "blah.com.conf" in /etc/bind.
9 # Author: Chris Koeritz
11 export WORKDIR="$( \cd "$(\dirname "$0")" && \pwd )" # obtain the script's working directory.
12 export FEISTY_MEOW_APEX="$( \cd "$WORKDIR/../.." && \pwd )"
14 source "$FEISTY_MEOW_APEX/scripts/core/launch_feisty_meow.sh"
16 # some defaults that are convenient for current purposes.
18 # hmmm: !!! these would need to be parameterized somehow for this script to become really general.
20 # in our scheme, the single IP address that all our domains map to.
21 IP_ADDRESS="10.28.42.20"
22 # the email address (where first dot is replaced by @) for the administrator of the domain.
23 SERVER_ADMIN="developer.cakelampvm.com"
24 # the name of the name server for the new domains (should already be configured).
25 MAIN_NAME_SERVER="ns.cakelampvm.com"
26 # the name of the mail server for a new domain (should already be configured).
27 MAIL_SERVER="mail.cakelampvm.com"
28 # the distribution name to be listed in info for the new domain or subdomain.
31 # creates a totally new domain config file for DNS.
32 function write_new_domain_file()
34 local domain_name="$1"; shift
36 local domain_file="/etc/bind/${domain_name}.conf"
38 echo "adding a totally new domain called $domain_name"
39 echo "using the config file: $domain_file"
41 if [ -f $domain_file ]; then
43 echo "The domain configuration file already exists at:"
45 echo "Since we don't want to tear that down if it has specialized configuration"
46 echo "data in it, we will just leave it in place and consider our job done."
53 @ IN SOA @ ${SERVER_ADMIN}. (
60 IN NS ${MAIN_NAME_SERVER}.
61 IN MX 10 ${MAIL_SERVER}.
63 ${domain_name}. IN A ${IP_ADDRESS}
64 IN HINFO \"linux server\" \"${DISTRO}\"
68 # hooks up a new config file into bind's list of zones.
69 function add_zone_for_new_domain()
71 local domain_name="$1"; shift
73 local domain_file="/etc/bind/${domain_name}.conf"
75 echo "adding a new domain configured by ${domain_file} into"
76 echo "the named.conf.local configuration file."
78 # append the reference to the new conf file in the zone list.
80 zone \"${domain_name}\" in {
81 file \"${domain_file}\";
86 ////////////////////////////////////////////////////////////////////////////
88 " >> /etc/bind/named.conf.local
91 # adds a new subdomain under a containing domain.
92 function add_new_subdomain()
94 local new_domain="$1"; shift
96 # split up the full domain name into subdomain portion and containing domain.
97 local subdomain="${new_domain%.*.*}"
98 local containing_domain="${new_domain#*.}"
100 echo "adding a subdomain $subdomain to containing domain $containing_domain"
102 local domain_file="/etc/bind/${containing_domain}.conf"
103 # see if config file already exists; if not, complain.
104 if [ ! -f "$domain_file" ]; then
105 echo "The domain configuration file for $new_domain is missing."
106 echo "It should already be present in: $domain_file"
107 echo "Please add the containing domain before trying to add a subdomain."
111 # see if subdomain already present in config.
112 if [ $(grep -q "$new_domain" "$domain_file") ]; then
113 echo "The subdomain $subdomain already seems to exist in the domain"
114 echo "configuration file: $domain_file"
115 echo "Please edit the config file to remove the subdomain before trying"
116 echo "to re-add the subdomain."
120 # append the new subdomain into the config file.
122 ${subdomain}.${containing_domain}. IN A ${IP_ADDRESS}
123 IN HINFO \"linux server\" \"${DISTRO}\"
124 " >> /etc/bind/${containing_domain}.conf
128 function restart_bind()
130 echo restarting DNS server.
131 service bind9 restart
132 if [ $? -ne 0 ]; then
133 echo "The bind service did not restart properly. Please check the error logs."
136 echo DNS server restarted.
139 # main body of script.
141 if [[ $EUID != 0 ]]; then
142 echo "This script must be run as root or sudo."
146 new_domain="$1"; shift
148 if [ -z "$new_domain" ]; then
149 echo "This script needs a domain name to add to DNS."
153 # if domain name has three or more components, then add a subdomain.
154 # otherwise, add a full new domain.
155 if [[ $new_domain == *"."*"."* ]]; then
156 # add a subdomain to the containing domain.
157 add_new_subdomain "$new_domain"
160 # create a totally new domain in DNS.
161 write_new_domain_file "$new_domain"
162 add_zone_for_new_domain "$new_domain"