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#
# Copyright (C) 2016 FreeIPA Contributors see COPYING for license
#
import time
import dns.resolver
import dns.rrset
import dns.rdatatype
import dns.rdataclass
from ipatests.test_integration.base import IntegrationTest
from ipatests.test_integration import tasks
from ipapython.dnsutil import DNSName
IPA_DEFAULT_MASTER_SRV_REC = (
# srv record name, port
(DNSName(u'_ldap._tcp'), 389),
(DNSName(u'_kerberos._tcp'), 88),
(DNSName(u'_kerberos._udp'), 88),
(DNSName(u'_kerberos-master._tcp'), 88),
(DNSName(u'_kerberos-master._udp'), 88),
(DNSName(u'_kpasswd._tcp'), 464),
(DNSName(u'_kpasswd._udp'), 464),
)
def resolve_records_from_server(rname, rtype, nameserver, logger):
res = dns.resolver.Resolver()
res.nameservers = [nameserver]
res.lifetime = 10
logger.debug("Query: %s %s, nameserver %s", rname, rtype, nameserver)
ans = res.query(rname, rtype)
logger.debug("Answer: %s", ans.rrset)
return ans.rrset
def _gen_expected_srv_rrset(rname, port, servers, ttl=86400):
rdata_list = [
"{prio} {weight} {port} {servername}".format(
prio=prio,
weight=weight,
port=port,
servername=servername.make_absolute()
)
for prio, weight, servername in servers
]
return dns.rrset.from_text_list(
rname, ttl, dns.rdataclass.IN, dns.rdatatype.SRV, rdata_list
)
class TestDNSLocations(IntegrationTest):
"""Simple test if SRV DNS records for IPA locations are generated properly
Topology:
* 3 servers (replica0 --- master --- replica1)
* 2 locations (prague, paris)
"""
num_replicas = 2
topology = 'star'
LOC_PRAGUE = u'prague'
LOC_PARIS = u'paris'
PRIO_HIGH = 0
PRIO_LOW = 50
WEIGHT = 100
@classmethod
def install(cls, mh):
tasks.install_master(cls.master, setup_dns=True)
tasks.install_replica(cls.master, cls.replicas[0], setup_dns=True,
setup_ca=False)
tasks.install_replica(cls.master, cls.replicas[1], setup_dns=True,
setup_ca=False)
for host in (cls.master, cls.replicas[0], cls.replicas[1]):
ldap = host.ldap_connect()
tasks.wait_for_replication(ldap)
# give time to named to retrieve new records
time.sleep(20)
def _test_against_server(self, server_ip, domain, expected_servers):
for rname, port in IPA_DEFAULT_MASTER_SRV_REC:
name_abs = rname.derelativize(domain)
expected = _gen_expected_srv_rrset(
name_abs, port, expected_servers)
query = resolve_records_from_server(
name_abs, 'SRV', server_ip, self.log)
assert expected == query, (
"Expected and received DNS data do not match on server "
"with IP: '{}' for name '{}' (expected:\n{}\ngot:\n{})".format(
server_ip, name_abs, expected, query))
def test_without_locations(self):
"""Servers are not in locations, this tests if basic system records
are generated properly"""
domain = DNSName(self.master.domain.name).make_absolute()
expected_servers = (
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
for ip in (self.master.ip, self.replicas[0].ip, self.replicas[1].ip):
self._test_against_server(ip, domain, expected_servers)
def test_nsupdate_without_locations(self):
"""Test nsupdate file generated by dns-update-system-records
Remove all records and the use nsupdate to restore state and test if
all record are there as expected"""
domain = DNSName(self.master.domain.name).make_absolute()
filepath = '/tmp/ipa.nsupdate'
self.master.run_command([
'ipa', 'dns-update-system-records', '--dry-run', '--out', filepath
])
# delete original records first
for rname, _port in IPA_DEFAULT_MASTER_SRV_REC:
self.master.run_command([
'ipa', 'dnsrecord-del', str(domain), str(rname), '--del-all'
])
# allow unauthenticates nsupdate (no need to testing authentication)
self.master.run_command([
'ipa', 'dnszone-mod', str(domain),
'--update-policy=grant * wildcard *;'
])
self.master.run_command(['nsupdate', '-g', filepath])
time.sleep(5) # give time to named to process everything from update
self.test_without_locations()
def test_one_replica_in_location(self):
"""Put one replica to location and test if records changed properly
"""
# create location prague, replica0 --> location prague
self.master.run_command([
'ipa', 'location-add', self.LOC_PRAGUE
])
self.master.run_command([
'ipa', 'server-mod', self.replicas[0].hostname,
'--location', self.LOC_PRAGUE
])
tasks.restart_named(self.replicas[0])
servers_without_loc = (
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_without_loc = DNSName(self.master.domain.name).make_absolute()
servers_prague_loc = (
(self.PRIO_LOW, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_prague_loc = (
DNSName('{}._locations'.format(self.LOC_PRAGUE)) +
DNSName(self.master.domain.name).make_absolute()
)
self._test_against_server(
self.replicas[0].ip, domain_prague_loc, servers_prague_loc)
for ip in (self.master.ip, self.replicas[1].ip):
self._test_against_server(
ip, domain_without_loc, servers_without_loc)
def test_two_replicas_in_location(self):
"""Put second replica to location and test if records changed properly
"""
# create location paris, replica1 --> location prague
self.master.run_command(['ipa', 'location-add', self.LOC_PARIS])
self.master.run_command([
'ipa', 'server-mod', self.replicas[1].hostname, '--location',
self.LOC_PARIS])
tasks.restart_named(self.replicas[1])
servers_without_loc = (
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_without_loc = DNSName(self.master.domain.name).make_absolute()
servers_prague_loc = (
(self.PRIO_LOW, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_prague_loc = (
DNSName('{}._locations'.format(self.LOC_PRAGUE)) + DNSName(
self.master.domain.name).make_absolute())
servers_paris_loc = (
(self.PRIO_LOW, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_paris_loc = (
DNSName('{}._locations'.format(self.LOC_PARIS)) + DNSName(
self.master.domain.name).make_absolute())
self._test_against_server(
self.replicas[0].ip, domain_prague_loc, servers_prague_loc)
self._test_against_server(
self.replicas[1].ip, domain_paris_loc, servers_paris_loc)
self._test_against_server(
self.master.ip, domain_without_loc, servers_without_loc)
def test_all_servers_in_location(self):
"""Put master (as second server) to location and test if records
changed properly
"""
# master --> location paris
self.master.run_command([
'ipa', 'server-mod', self.master.hostname, '--location',
self.LOC_PARIS])
tasks.restart_named(self.master)
servers_prague_loc = (
(self.PRIO_LOW, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_prague_loc = (
DNSName('{}._locations'.format(self.LOC_PRAGUE)) + DNSName(
self.master.domain.name).make_absolute())
servers_paris_loc = (
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.master.hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_paris_loc = (
DNSName('{}._locations'.format(self.LOC_PARIS)) + DNSName(
self.master.domain.name).make_absolute())
self._test_against_server(
self.replicas[0].ip, domain_prague_loc, servers_prague_loc)
for ip in (self.replicas[1].ip, self.master.ip):
self._test_against_server(ip, domain_paris_loc, servers_paris_loc)
def test_change_weight(self):
"""Change weight of master and test if records changed properly
"""
new_weight = 2000
self.master.run_command([
'ipa', 'server-mod', self.master.hostname, '--service-weight',
str(new_weight)
])
# all servers must be restarted
tasks.restart_named(self.master, self.replicas[0], self.replicas[1])
servers_prague_loc = (
(self.PRIO_LOW, new_weight, DNSName(self.master.hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_prague_loc = (
DNSName('{}._locations'.format(self.LOC_PRAGUE)) + DNSName(
self.master.domain.name).make_absolute())
servers_paris_loc = (
(self.PRIO_HIGH, new_weight, DNSName(self.master.hostname)),
(self.PRIO_LOW, self.WEIGHT, DNSName(self.replicas[0].hostname)),
(self.PRIO_HIGH, self.WEIGHT, DNSName(self.replicas[1].hostname)),
)
domain_paris_loc = (
DNSName('{}._locations'.format(self.LOC_PARIS)) + DNSName(
self.master.domain.name).make_absolute())
self._test_against_server(
self.replicas[0].ip, domain_prague_loc, servers_prague_loc)
for ip in (self.replicas[1].ip, self.master.ip):
self._test_against_server(ip, domain_paris_loc, servers_paris_loc)
|
