closer to remove domain working

[feisty_meow.git] / scripts / system / common_sysadmin.sh

diff --git a/scripts/system/common_sysadmin.sh b/scripts/system/common_sysadmin.sh
new file mode 100644 (file)
index 0000000..7ca026a
--- /dev/null
+++ b/scripts/system/common_sysadmin.sh
@@ -0,0 +1,131 @@
+#!/bin/bash
+
+# this is a library of functions shared by scripts in the system folder.
+#
+# Author: Chris Koeritz
+
+#export WORKDIR="$( \cd "$(\dirname "$0")" && \pwd )"  # obtain the script's working directory.
+#export FEISTY_MEOW_APEX="$( \cd "$WORKDIR/../.." && \pwd )"
+
+#source "$FEISTY_MEOW_APEX/scripts/core/launch_feisty_meow.sh"
+
+# creates a totally new domain config file for DNS.
+function write_new_domain_file()
+{
+  local domain_name="$1"; shift
+
+  local domain_file="/etc/bind/${domain_name}.conf"
+
+  echo "adding a totally new domain called $domain_name"
+  echo "using the config file: $domain_file"
+
+  if [ -f $domain_file ]; then
+    echo
+    echo "The domain configuration file already exists at:"
+    echo "  $domain_file"
+    echo "Since we don't want to tear that down if it has specialized configuration"
+    echo "data in it, we will just leave it in place and consider our job done."
+    echo
+    exit 0
+  fi
+
+  echo "
+\$TTL 1W
+@      IN SOA  @       ${SERVER_ADMIN}. (
+               2017100801 ; serial
+               2H ; refresh
+               8M ; retry
+               14D ; expiry
+               6H ) ; minimum
+
+       IN NS           ${MAIN_NAME_SERVER}.
+       IN MX   10      ${MAIL_SERVER}.
+
+${domain_name}.        IN A    ${IP_ADDRESS}
+       IN HINFO        \"linux server\" \"${DISTRO}\"
+" >"$domain_file"
+
+  # our personalized configuration approach wants the real owner to own the file.
+  chown "$(logname):$(logname)" $domain_file
+  test_or_die "setting ownership on: $domain_file"
+}
+
+# hooks up a new config file into bind's list of zones.
+function add_zone_for_new_domain()
+{
+  local domain_name="$1"; shift
+
+  local domain_file="/etc/bind/${domain_name}.conf"
+
+  echo "adding a new domain configured by ${domain_file} into"
+  echo "the named.conf.local configuration file."
+
+  # append the reference to the new conf file in the zone list.
+  echo "
+zone \"${domain_name}\" in {
+       file \"${domain_file}\";
+       type master;
+       allow-query { any; };
+};
+
+////////////////////////////////////////////////////////////////////////////
+
+" >> /etc/bind/named.conf.local
+
+  # keep ownership for the real user.
+  chown "$(logname):$(logname)" /etc/bind/named.conf.local
+  test_or_die "setting ownership on: /etc/bind/named.conf.local"
+
+}
+
+# adds a new subdomain under a containing domain.
+function add_new_subdomain()
+{
+  local new_domain="$1"; shift
+
+  # split up the full domain name into subdomain portion and containing domain.
+  local subdomain="${new_domain%.*.*}"
+  local containing_domain="${new_domain#*.}"
+
+  echo "adding a subdomain $subdomain to containing domain $containing_domain"
+
+  local domain_file="/etc/bind/${containing_domain}.conf"
+  # see if config file already exists; if not, complain.
+  if [ ! -f "$domain_file" ]; then
+    echo "The domain configuration file for $new_domain is missing."
+    echo "It should already be present in: $domain_file"
+    echo "Please add the containing domain before trying to add a subdomain."
+    exit 1
+  fi
+
+  # see if subdomain already present in config.
+  if [ $(grep -q "$new_domain" "$domain_file") ]; then
+    echo "The subdomain $subdomain already seems to exist in the domain"
+    echo "configuration file: $domain_file"
+    echo "Please edit the config file to remove the subdomain before trying"
+    echo "to re-add the subdomain."
+    exit 1
+  fi
+
+  # append the new subdomain into the config file.
+  echo "
+${subdomain}.${containing_domain}.    IN A    ${IP_ADDRESS}
+        IN HINFO \"linux server\" \"${DISTRO}\"
+" >> /etc/bind/${containing_domain}.conf
+
+  # keep ownership for real user.
+  chown "$(logname):$(logname)" "/etc/bind/${containing_domain}.conf"
+  test_or_die "setting ownership on: /etc/bind/${containing_domain}.conf"
+}
+
+function restart_bind()
+{
+  echo restarting DNS server.
+  service bind9 restart
+  if [ $? -ne 0 ]; then
+    echo "The bind service did not restart properly.  Please check the error logs."
+    exit 1
+  fi
+  echo DNS server restarted.
+}
+