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}\"
67 # our personalized configuration approach wants the real owner to own the file.
68 chown "$(logname):$(logname)" $domain_file
69 test_or_die "setting ownership on: $domain_file"
72 # hooks up a new config file into bind's list of zones.
73 function add_zone_for_new_domain()
75 local domain_name="$1"; shift
77 local domain_file="/etc/bind/${domain_name}.conf"
79 echo "adding a new domain configured by ${domain_file} into"
80 echo "the named.conf.local configuration file."
82 # append the reference to the new conf file in the zone list.
84 zone \"${domain_name}\" in {
85 file \"${domain_file}\";
90 ////////////////////////////////////////////////////////////////////////////
92 " >> /etc/bind/named.conf.local
94 # keep ownership for the real user.
95 chown "$(logname):$(logname)" /etc/bind/named.conf.local
96 test_or_die "setting ownership on: /etc/bind/named.conf.local"
100 # adds a new subdomain under a containing domain.
101 function add_new_subdomain()
103 local new_domain="$1"; shift
105 # split up the full domain name into subdomain portion and containing domain.
106 local subdomain="${new_domain%.*.*}"
107 local containing_domain="${new_domain#*.}"
109 echo "adding a subdomain $subdomain to containing domain $containing_domain"
111 local domain_file="/etc/bind/${containing_domain}.conf"
112 # see if config file already exists; if not, complain.
113 if [ ! -f "$domain_file" ]; then
114 echo "The domain configuration file for $new_domain is missing."
115 echo "It should already be present in: $domain_file"
116 echo "Please add the containing domain before trying to add a subdomain."
120 # see if subdomain already present in config.
121 if [ $(grep -q "$new_domain" "$domain_file") ]; then
122 echo "The subdomain $subdomain already seems to exist in the domain"
123 echo "configuration file: $domain_file"
124 echo "Please edit the config file to remove the subdomain before trying"
125 echo "to re-add the subdomain."
129 # append the new subdomain into the config file.
131 ${subdomain}.${containing_domain}. IN A ${IP_ADDRESS}
132 IN HINFO \"linux server\" \"${DISTRO}\"
133 " >> /etc/bind/${containing_domain}.conf
135 # keep ownership for real user.
136 chown "$(logname):$(logname)" "/etc/bind/${containing_domain}.conf"
137 test_or_die "setting ownership on: /etc/bind/${containing_domain}.conf"
140 function restart_bind()
142 echo restarting DNS server.
143 service bind9 restart
144 if [ $? -ne 0 ]; then
145 echo "The bind service did not restart properly. Please check the error logs."
148 echo DNS server restarted.
151 # main body of script.
153 if [[ $EUID != 0 ]]; then
154 echo "This script must be run as root or sudo."
158 new_domain="$1"; shift
160 if [ -z "$new_domain" ]; then
161 echo "This script needs a domain name to add to DNS."
165 # if domain name has three or more components, then add a subdomain.
166 # otherwise, add a full new domain.
167 if [[ $new_domain == *"."*"."* ]]; then
168 # add a subdomain to the containing domain.
169 add_new_subdomain "$new_domain"
172 # create a totally new domain in DNS.
173 write_new_domain_file "$new_domain"
174 add_zone_for_new_domain "$new_domain"