--- /dev/null
+ #!/usr/bin/python
+ from twisted.internet import reactor
+ from twisted.names import server
+ from twisted.names import dns
+ from twisted.names import common
+ from twisted.internet import defer
+ from twisted.python import failure
+
+ import sipb_xen_database
+
+ class DatabaseAuthority(common.ResolverBase):
+ """An Authority that is loaded from a file."""
+
+ soa = None
+
+ def __init__(self, domain, database=None):
+ common.ResolverBase.__init__(self)
+ if database is not None:
+ sipb_xen_database.connect(database)
+ self.domain = domain
+ self.soa = dns.Record_SOA(mname='sipb-xen-dev.mit.edu',
+ rname='sipb-xen.mit.edu',
+ serial=1, refresh=3600, retry=900,
+ expire=3600000, minimum=21600, ttl=3600)
+ def _lookup(self, name, cls, type, timeout = None):
+ if not (name.lower() == self.domain or
+ name.lower().endswith('.'+self.domain)):
+ #Not us
+ return defer.fail(failure.Failure(dns.DomainError(name)))
+ results = []
+ if cls == dns.IN and type in (dns.A, dns.ALL_RECORDS):
+ host = name[:-len(self.domain)-1]
+ value = sipb_xen_database.Machine.get_by(name=host)
+ if value is None or not value.nics:
+ return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
+ ip = value.nics[0].ip
+ if ip is None: #Deactivated?
+ return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
+ ttl = 900
+ record = dns.Record_A(ip, ttl)
+ results.append(dns.RRHeader(name, dns.A, dns.IN,
+ ttl, record, auth=True))
+ authority = []
+ authority.append(dns.RRHeader(self.domain, dns.SOA, dns.IN, 3600,
+ self.soa, auth=True))
+ return defer.succeed((results, authority, []))
+ #Doesn't exist
+ return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
+
+ if '__main__' == __name__:
+ resolver = DatabaseAuthority('servers.csail.mit.edu',
+ 'postgres://sipb-xen@sipb-xen-dev/sipb_xen')
+
+ verbosity = 0
+ f = server.DNSServerFactory(authorities=[resolver], verbose=verbosity)
+ p = dns.DNSDatagramProtocol(f)
+ f.noisy = p.noisy = verbosity
+
+ reactor.listenUDP(53, p)
+ reactor.listenTCP(53, f)
+ reactor.run()
--- /dev/null
+#! /bin/sh
+### BEGIN INIT INFO
+# Provides: sipb-xen-dns
+# Required-Start: $local_fs $remote_fs
+# Required-Stop: $local_fs $remote_fs
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: sipb-xen DNS server
+# Description:
+### END INIT INFO
+
+# Author: Foo Bar <foobar@baz.org>
+#
+# Please remove the "Author" lines above and replace them
+# with your own name if you copy and modify this script.
+
+# Do NOT "set -e"
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
- DESC="Description of the service"
- NAME=daemonexecutablename
- DAEMON=/usr/sbin/$NAME
- DAEMON_ARGS="--options args"
++DESC="The sipb-xen DNS server"
++NAME=sipb-xen-dns
++DAEMON=/usr/local/lib/sipb-xen-dns/dnsserver.py
++DAEMON_ARGS=""
+PIDFILE=/var/run/$NAME.pid
+SCRIPTNAME=/etc/init.d/$NAME
+
+# Exit if the package is not installed
+[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+ # Return
+ # 0 if daemon has been started
+ # 1 if daemon was already running
+ # 2 if daemon could not be started
- start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
- || return 1
- start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
- $DAEMON_ARGS \
- || return 2
- # Add code here, if necessary, that waits for the process to be ready
- # to handle requests from services started subsequently which depend
- # on this one. As a last resort, sleep for some time.
++ daemon --running -n $NAME && return 1
++ daemon -r -n $NAME -U $DAEMON $DAEMON_ARGS || return 2
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+ # Return
+ # 0 if daemon has been stopped
+ # 1 if daemon was already stopped
+ # 2 if daemon could not be stopped
+ # other if a failure occurred
- start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
++ daemon --stop -n $NAME
+ RETVAL="$?"
+ [ "$RETVAL" = 2 ] && return 2
- # Wait for children to finish too if this is a daemon that forks
- # and if the daemon is only ever run from this initscript.
- # If the above conditions are not satisfied then add some other code
- # that waits for the process to drop all resources that could be
- # needed by services started subsequently. A last resort is to
- # sleep for some time.
- start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
- [ "$?" = 2 ] && return 2
+ # Many daemons don't delete their pidfiles when they exit.
+ rm -f $PIDFILE
+ return "$RETVAL"
+}
+
- #
- # Function that sends a SIGHUP to the daemon/service
- #
- do_reload() {
- #
- # If the daemon can reload its configuration without
- # restarting (for example, when it is sent a SIGHUP),
- # then implement that here.
- #
- start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
- return 0
- }
-
+case "$1" in
+ start)
+ [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
+ do_start
+ case "$?" in
+ 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+ 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+ esac
+ ;;
+ stop)
+ [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
+ do_stop
+ case "$?" in
+ 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
+ 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
+ esac
+ ;;
+ #reload|force-reload)
+ #
+ # If do_reload() is not implemented then leave this commented out
+ # and leave 'force-reload' as an alias for 'restart'.
+ #
+ #log_daemon_msg "Reloading $DESC" "$NAME"
+ #do_reload
+ #log_end_msg $?
+ #;;
+ restart|force-reload)
+ #
+ # If the "reload" option is implemented then remove the
+ # 'force-reload' alias
+ #
+ log_daemon_msg "Restarting $DESC" "$NAME"
+ do_stop
+ case "$?" in
+ 0|1)
+ do_start
+ case "$?" in
+ 0) log_end_msg 0 ;;
+ 1) log_end_msg 1 ;; # Old process is still running
+ *) log_end_msg 1 ;; # Failed to start
+ esac
+ ;;
+ *)
+ # Failed to stop
+ log_end_msg 1
+ ;;
+ esac
+ ;;
+ *)
+ #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
+ echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
+ exit 3
+ ;;
+esac
+
+:
projects / invirt/packages/invirt-dns.git / commitdiff
