X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-dns.git/blobdiff_plain/d42c0a0fd88a14a13fa29cccbdc3c014bbfac639..403b09e06873085b3b8a9992c827b4aa5f870610:/files/usr/sbin/invirt-dns

diff --git a/files/usr/sbin/invirt-dns b/files/usr/sbin/invirt-dns
deleted file mode 100755
index 3d95965..0000000
--- a/files/usr/sbin/invirt-dns
+++ /dev/null
@@ -1,144 +0,0 @@
-#!/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
-
-from invirt.config import structs as config
-import invirt.database
-import psycopg2
-import sqlalchemy
-import time
-
-class DatabaseAuthority(common.ResolverBase):
-    """An Authority that is loaded from a file."""
-
-    soa = None
-
-    def __init__(self, domains=None, database=None):
-        common.ResolverBase.__init__(self)
-        if database is not None:
-            invirt.database.connect(database)
-        else:
-            invirt.database.connect()
-        if domains is not None:
-            self.domains = domains
-        else:
-            self.domains = config.dns.domains
-        ns = config.dns.nameservers[0]
-        self.soa = dns.Record_SOA(mname=ns.hostname,
-                                  rname=config.dns.contact.replace('@','.',1),
-                                  serial=1, refresh=3600, retry=900,
-                                  expire=3600000, minimum=21600, ttl=3600)
-        self.ns = dns.Record_NS(name=ns.hostname, ttl=3600)
-        record = dns.Record_A(address=ns.ip, ttl=3600)
-        self.ns1 = dns.RRHeader(ns.hostname, dns.A, dns.IN,
-                                3600, record, auth=True)
-
-    
-    def _lookup(self, name, cls, type, timeout = None):
-        for i in range(3):
-            try:
-                value = self._lookup_unsafe(name, cls, type, timeout = None)
-            except (psycopg2.OperationalError, sqlalchemy.exceptions.SQLError):
-                if i == 2:
-                    raise
-                print "Reloading database"
-                time.sleep(0.5)
-                continue
-            else:
-                return value
-
-    def _lookup_unsafe(self, name, cls, type, timeout):
-        invirt.database.clear_cache()
-        
-        ttl = 900
-        name = name.lower()
-
-        # XXX hack for the transition to two separate dev/prod clusters
-        if 'dev.xvm.mit.edu' in self.domains and name.endswith('prod.xvm.mit.edu'):
-            # import time, sys
-            # print time.localtime(), 'handling prod request', name
-            # sys.stdout.flush()
-
-            # Point the client in the right direction for prod requests.
-            authority = dns.RRHeader('prod.xvm.mit.edu', dns.NS, dns.IN, 3600,
-                    dns.Record_NS(name='ns1.prod.xvm.mit.edu', ttl=3600), auth=True)
-            additional = dns.RRHeader('ns1.prod.xvm.mit.edu', dns.A, dns.IN, 3600,
-                    dns.Record_A(address='18.181.0.221', ttl=3600), auth=True)
-            return defer.succeed(([], [authority], [additional]))
-
-        if name in self.domains:
-            domain = name
-        else:
-            # Look for the longest-matching domain.  (This works because domain
-            # will remain bound after breaking out of the loop.)
-            best_domain = ''
-            for domain in self.domains:
-                if name.endswith('.'+domain) and len(domain) > len(best_domain):
-                    best_domain = domain
-            if best_domain == '':
-                return defer.fail(failure.Failure(dns.DomainError(name)))
-            domain = best_domain
-        results = []
-        authority = []
-        additional = [self.ns1]
-        authority.append(dns.RRHeader(domain, dns.NS, dns.IN,
-                                      3600, self.ns, auth=True))
-
-        if cls == dns.IN:
-            host = name[:-len(domain)-1]
-            if not host: # Request for the domain itself.
-                if type in (dns.A, dns.ALL_RECORDS):
-                    record = dns.Record_A(config.dns.nameservers[0].ip, ttl)
-                    results.append(dns.RRHeader(name, dns.A, dns.IN, 
-                                                ttl, record, auth=True))
-                elif type == dns.NS:
-                    results.append(dns.RRHeader(domain, dns.NS, dns.IN,
-                                                ttl, self.ns, auth=True))
-                    authority = []
-                elif type == dns.SOA:
-                    results.append(dns.RRHeader(domain, dns.SOA, dns.IN,
-                                                ttl, self.soa, auth=True))
-            else: # Request for a subdomain.
-                if 'passup' in dir(config.dns) and host in config.dns.passup:
-                    record = dns.Record_CNAME('%s.%s' % (host, config.dns.parent), ttl)
-                    return defer.succeed((
-                        [dns.RRHeader(name, dns.CNAME, dns.IN, ttl, record, auth=True)],
-                        [], []))
-
-                value = invirt.database.Machine.query().filter_by(name=host).first()
-                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)))
-
-                if type in (dns.A, dns.ALL_RECORDS):
-                    record = dns.Record_A(ip, ttl)
-                    results.append(dns.RRHeader(name, dns.A, dns.IN, 
-                                                ttl, record, auth=True))
-                elif type == dns.SOA:
-                    results.append(dns.RRHeader(domain, dns.SOA, dns.IN,
-                                                ttl, self.soa, auth=True))
-            if len(results) == 0:
-                authority = []
-                additional = []
-            return defer.succeed((results, authority, additional))
-        else:
-            #Doesn't exist
-            return defer.fail(failure.Failure(dns.AuthoritativeDomainError(name)))
-
-if '__main__' == __name__:
-    resolver = DatabaseAuthority()
-
-    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()