enable local DNS server that can provide minimal forward DNS resolution for MyPLC...

[myplc.git] / plc.d / dns

diff --git a/plc.d/dns b/plc.d/dns
new file mode 100755 (executable)
index 0000000..446c21f
--- /dev/null
+++ b/plc.d/dns
@@ -0,0 +1,60 @@
+#!/bin/bash
+#
+# priority: 850
+#
+# Start local DNS server to provide minimal DNS forward resolution for
+# ourselves and our nodes.
+#
+# Mark Huang <mlhuang@cs.princeton.edu>
+# Copyright (C) 2006 The Trustees of Princeton University
+#
+# $Id: mail,v 1.2 2006/04/25 21:18:19 mlhuang Exp $
+#
+
+# Source function library and configuration
+. /etc/plc.d/functions
+. /etc/planetlab/plc_config
+
+case "$1" in
+    start)
+       if [ "$PLC_DNS_ENABLED" != "1" ] ; then
+           exit 0
+       fi
+
+       MESSAGE=$"Starting DNS server"
+       dialog "$MESSAGE"
+
+       # From the default dnsmasq.conf configuration file:
+       #
+       # The [domain-needed and bogus-priv] options make you a better
+       # netizen, since they tell dnsmasq to filter out queries which
+       # the public DNS cannot answer, and which load the servers
+       # (especially the root servers) uneccessarily.
+       #
+       # The api-config bootstrap script writes node hostnames to
+       # /etc/plc_hosts.
+       #
+       cat >/etc/dnsmasq.conf <<EOF
+domain-needed
+bogus-priv
+addn-hosts=/etc/plc_hosts
+EOF
+
+       plc_daemon dnsmasq
+       check
+
+       result "$MESSAGE"
+       ;;
+
+    stop)
+       MESSAGE=$"Stopping DNS server"
+       dialog "$MESSAGE"
+
+       killproc plc_dnsmasq
+       check
+
+       result "$MESSAGE"
+       ;;
+esac
+
+exit $ERRORS