slap/standalone: Use IPv6 range when available

See merge request nexedi/slapos.core!538

slapos/format.py

@@ -1464,9 +1464,15 @@ def parse_computer_definition(conf, definition_path):
       address_list.append(dict(addr=address, netmask=netmask))
     if computer_definition.has_option(section, 'ipv6_range'):
       ipv6_range_network = computer_definition.get(section, 'ipv6_range')
-      addr, netmask = ipv6_range_network.split('/')
-      netmask = netmaskFromLenIPv6(int(netmask))
-      ipv6_range = {'addr' : address, 'netmask' : netmask, 'network' : ipv6_range_network}
+      ipv6_range_addr, ipv6_range_prefixlen = ipv6_range_network.split('/')
+      ipv6_range_prefixlen = int(ipv6_range_prefixlen)
+      ipv6_range_netmask = netmaskFromLenIPv6(ipv6_range_prefixlen)
+      ipv6_range = {
+        'addr' : ipv6_range_addr,
+        'netmask' : ipv6_range_netmask,
+        'network' : ipv6_range_network,
+        'prefixlen': ipv6_range_prefixlen,
+      }
     else:
       ipv6_range = {}
     tap = Tap(computer_definition.get(section, 'network_interface'))

slapos/grid/promise/generic.py

@@ -493,12 +493,8 @@ class GenericPromise(with_metaclass(ABCMeta, object)):
       ))
     elif (not self.__is_tested and not check_anomaly) or \
         (not self.__is_anomaly_detected and check_anomaly):
-      # Anomaly or Test is disabled on this promise, send empty result
-      if self.getConfig('slapgrid-version', '') <= '1.4.17':
-        # old version cannot send EmptyResult
-        self.__sendResult(PromiseQueueResult(item=TestResult()))
-      else:
-        self.__sendResult(PromiseQueueResult())
+      # Anomaly or Test is disabled on this promise, send empty 
+      self.__sendResult(PromiseQueueResult())
     else:
       try:
         self.sense()

slapos/slap/standalone.py

@@ -59,12 +59,25 @@ from .interface.slap import IRequester
 from ..grid.slapgrid import SLAPGRID_PROMISE_FAIL
 
 from .slap import slap
-from ..util import dumps, rmtree
+from ..util import dumps, rmtree, getPartitionIpv6Addr, getPartitionIpv6Range
 
 from ..grid.svcbackend import getSupervisorRPC
 from ..grid.svcbackend import _getSupervisordSocketPath
 
 
+NETMASK_IPV6_FULL = 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff'
+NETMASK_IPV4_FULL = '255.255.255.255'
+
+
+def _parseIPv6(ipv6):
+  try:
+    addr, prefixlen = ipv6.split('/')
+    prefixlen = int(prefixlen)
+  except ValueError:
+    addr, prefixlen = ipv6, None
+  return addr, prefixlen
+
+
 @zope.interface.implementer(IException)
 class SlapOSNodeCommandError(Exception):
   """Exception raised when running a SlapOS Node command failed.
@@ -205,6 +218,7 @@ class SlapOSConfigWriter(ConfigWriter):
     read_only_shared_part_list = '\n  '.join( #  pylint: disable=unused-variable; used in format()
         standalone_slapos._shared_part_list)
     partition_forward_configuration = '\n'.join(self._getPartitionForwardConfiguration())
+    has_ipv6_range = ('false', 'true')[standalone_slapos._partitions_have_ipv6_range]
     with open(path, 'w') as f:
       f.write(
           textwrap.dedent(
@@ -232,6 +246,7 @@ class SlapOSConfigWriter(ConfigWriter):
               create_tap = false
               create_tun = false
               computer_xml = {standalone_slapos._slapos_xml}
+              partition_has_ipv6_range = {has_ipv6_range}
 
               [slapproxy]
               host = {standalone_slapos._server_ip}
@@ -287,9 +302,7 @@ class SlapformatDefinitionWriter(ConfigWriter):
   """
   def writeConfig(self, path):
     ipv4 = self._standalone_slapos._ipv4_address
-    ipv6 = self._standalone_slapos._ipv6_address
-    ipv4_cidr = ipv4 + '/255.255.255.255' if ipv4 else ''
-    ipv6_cidr = ipv6 + '/64' if ipv6 else ''
+    ipv4_cidr = '%s/%s' % (ipv4, NETMASK_IPV4_FULL) if ipv4 else ''
     user = pwd.getpwuid(os.getuid()).pw_name
     partition_base_name = self._standalone_slapos._partition_base_name
     with open(path, 'w') as f:
@@ -299,12 +312,24 @@ class SlapformatDefinitionWriter(ConfigWriter):
               [computer]
               address = {ipv4_cidr}\n
       """).format(**locals()))
+      ipv6 = self._standalone_slapos._ipv6_address
       for i in range(self._standalone_slapos._partition_count):
+        ipv6_single, ipv6_range = self._standalone_slapos._getPartitionIpv6(i)
+        if ipv6_single:
+          ipv6_single_cidr = '%s/%s' % (ipv6_single, NETMASK_IPV6_FULL)
+        else:
+          ipv6_single_cidr = ''
+        if ipv6_range:
+          ipv6_range_cidr = '%(addr)s/%(prefixlen)s' % ipv6_range
+          ipv6_range_config_line = 'ipv6_range = ' + ipv6_range_cidr
+        else:
+          ipv6_range_config_line = ''
         f.write(
             textwrap.dedent(
                 """
                 [partition_{i}]
-                address = {ipv6_cidr} {ipv4_cidr}
+                address = {ipv6_single_cidr} {ipv4_cidr}
+                {ipv6_range_config_line}
                 pathname = {partition_base_name}{i}
                 user = {user}
                 network_interface =\n
@@ -415,7 +440,13 @@ class StandaloneSlapOS(object):
     self._partition_base_name = 'slappart'
     self._ipv4_address = None
     self._ipv6_address = None
+    self._ipv6_range_prefixlen = None
+    self._partitions_have_ipv6_range = False
 
+    # NOTE: Using Standalone's own slapos (slapos.cli.entry) instead
+    # is not that easy because in test nodes standalone is often run
+    # with gpython (pygolang), and gpython currently doesn't support
+    # buildout
     self._slapos_bin = slapos_bin
 
     self._slapos_commands = {
@@ -594,8 +625,12 @@ class StandaloneSlapOS(object):
       partition_base_name="slappart"):
     """Creates `partition_count` partitions.
 
-    All partitions have the same `ipv4_address` and `ipv6_address` and
-    use the current system user.
+    All partitions have the same `ipv4_address` and use the current system
+    user.
+
+    `ipv6_address` can be a single address (in this case all partitions have
+    the same address) or a range in the form IPV6/CIDR (in this case each
+    partition has a subrange).
 
     When calling this a second time with a lower `partition_count` or with
     different `partition_base_name` will delete existing partitions.
@@ -628,17 +663,19 @@ class StandaloneSlapOS(object):
       if not (os.path.exists(partition_path)):
         os.mkdir(partition_path)
       os.chmod(partition_path, 0o750)
+      ipv6_addr, ipv6_range = self._getPartitionIpv6(i)
       partition_list.append({
           'address_list': [
               {
                   'addr': ipv4_address,
-                  'netmask': '255.255.255.255'
+                  'netmask': NETMASK_IPV4_FULL
               },
               {
-                  'addr': ipv6_address,
-                  'netmask': 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff'
-              },
+                  'addr': ipv6_addr,
+                  'netmask': NETMASK_IPV6_FULL
+              }
           ],
+          'ipv6_range' : ipv6_range,
           'path': partition_path,
           'reference': partition_reference,
           'tap': {
@@ -665,7 +702,7 @@ class StandaloneSlapOS(object):
     self.computer.updateConfiguration(
         dumps({
             'address': ipv4_address,
-            'netmask': '255.255.255.255',
+            'netmask': NETMASK_IPV4_FULL,
             'partition_list': partition_list,
             'reference': self._computer_id,
             'instance_root': self._instance_root,
@@ -694,11 +731,33 @@ class StandaloneSlapOS(object):
     self._partition_count = partition_count
     self._partition_base_name = partition_base_name
     self._ipv4_address = ipv4_address
-    self._ipv6_address = ipv6_address
+    self._ipv6_address, prefixlen = _parseIPv6(ipv6_address)
+    self._ipv6_range_prefixlen = prefixlen
+    self._partitions_have_ipv6_range = bool(prefixlen) and prefixlen < 112
     if old_partition_count != partition_count:
       SlapOSConfigWriter(self).writeConfig(self._slapos_config)
     SlapformatDefinitionWriter(self).writeConfig(self._slapformat_definition)
 
+    # remove slapos xml configuration in case of ip changes
+    try:
+      os.unlink(self._slapos_xml)
+    except OSError as e:
+      if e.errno != errno.ENOENT:
+        raise
+
+    # run slapos format --now
+    command = (
+      self._slapos_bin, 'node', 'format',
+      '--now',
+      '--cfg', self._slapos_config)
+    self._logger.debug("Running %s", command)
+    try:
+      output = subprocess.check_output(command, stderr=subprocess.STDOUT)
+      self._logger.info(output)
+    except subprocess.CalledProcessError as e:
+      self._logger.error(e.output)
+      raise
+
   def supply(self, software_url, computer_guid=None, state="available"):
     """Supply a software, see ISupply.supply
 
@@ -949,3 +1008,17 @@ class StandaloneSlapOS(object):
         return
       time.sleep(i * .01)
     raise RuntimeError("SlapOS not started")
+
+  def _getPartitionIpv6(self, i):
+    # returns (single_ipv6_address, ipv6_range) for a partition
+    # ipv6_address can be either a range or a single IPv6 address (with no /)
+    prefixlen = self._ipv6_range_prefixlen
+    if prefixlen is None:
+      return self._ipv6_address, None
+    ipv6_range = {'addr': self._ipv6_address, 'prefixlen': prefixlen}
+    ipv6_single = getPartitionIpv6Addr(ipv6_range, i)['addr']
+    if self._partitions_have_ipv6_range:
+      ipv6_partition_range = getPartitionIpv6Range(ipv6_range, i, 16)
+      return ipv6_single, ipv6_partition_range
+    else:
+      return ipv6_single, None

slapos/tests/test_cli.py

@@ -442,16 +442,13 @@ class TestCliBoot(CliMixin):
           patch('slapos.cli.boot.ConfigCommand.config_path', return_value=slapos_conf.name), \
           patch(
               'slapos.cli.boot.netifaces.ifaddresses',
-              return_value={socket.AF_INET6: ({'addr': '2000::1'},),},) as ifaddresses,\
-          patch('slapos.cli.boot._ping_hostname', return_value=1) as _ping_hostname:
+              return_value={socket.AF_INET6: ({'addr': '2000::1'},),},) as ifaddresses:
         app.run(('node', 'boot'))
 
       # boot command runs as root
       check_root_user.assert_called_once()
       # it waits for interface to have an IPv6 address
       ifaddresses.assert_called_once_with('interface_name_from_config')
-      # then ping master hostname to wait for connectivity
-      _ping_hostname.assert_called_once_with('slap.vifib.com')
       # then format and bang
       SlapOSApp().run.assert_any_call(['node', 'format', '--now', '--verbose'])
       SlapOSApp().run.assert_any_call(['node', 'bang', '-m', 'Reboot'])

slapos/tests/test_standalone.py

@@ -25,6 +25,7 @@
 #
 ##############################################################################
 
+import json
 import unittest
 import mock
 import os
@@ -40,6 +41,7 @@ import multiprocessing
 from contextlib import closing
 from six.moves.configparser import ConfigParser
 
+import netaddr
 import psutil
 
 from slapos.slap.standalone import StandaloneSlapOS
@@ -79,100 +81,186 @@ class TestSlapOSStandaloneSetup(unittest.TestCase):
   def setUp(self):
     checkPortIsFree()
 
-  def test_format(self):
+  def setupSimpleStandalone(self):
     working_dir = tempfile.mkdtemp(prefix=__name__)
     self.addCleanup(slapos.util.rmtree, working_dir)
     standalone = StandaloneSlapOS(
         working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
     self.addCleanup(standalone.stop)
+    return standalone
+
+  @staticmethod
+  def getInstancePath(standalone, *segments):
+    return os.path.join(standalone.instance_directory, *segments)
+
+  def assertExists(self, path):
+    self.assertTrue(os.path.exists(path))
+
+  def assertNotExists(self, path):
+    self.assertFalse(os.path.exists(path))
+
+  @classmethod
+  def getJsonResourceList(cls, standalone):
+    return [
+        cls.getJson(
+            cls.getInstancePath(
+                standalone, 'slappart%d' % i, '.slapos-resource'))
+        for i in range(standalone._partition_count)]
+
+  @staticmethod
+  def getJson(path):
+    with open(path) as f:
+      return json.load(f)
+
+  def test_format(self):
+    standalone = self.setupSimpleStandalone()
     standalone.format(3, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
+    self.assertExists(standalone.software_directory)
+    self.assertExists(standalone.instance_directory)
+    self.assertExists(
+        os.path.join(standalone.instance_directory, 'slappart0'))
+    self.assertExists(
+        os.path.join(standalone.instance_directory, 'slappart1'))
+    self.assertExists(
+        os.path.join(standalone.instance_directory, 'slappart2'))
+    for i in range(3):
+      self.assertExists(
+          self.getInstancePath(standalone, 'slappart%d' % i, '.slapos-resource'))
+
+  def test_format_ipv6_big_range(self):
+    standalone = self.setupSimpleStandalone()
+    prefixlen = 96
+    slapos_fake_ipv6_range = '%s/%d' % (SLAPOS_TEST_IPV6, prefixlen)
+    standalone.format(3, SLAPOS_TEST_IPV4, slapos_fake_ipv6_range)
+    resource_list = self.getJsonResourceList(standalone)
+    for i, resource in enumerate(resource_list):
+      resource_prefixlen = int(resource['ipv6_range']['network'].split('/')[1])
+      self.assertEqual(resource_prefixlen, prefixlen + 16)
+      self.assertTrue(netaddr.valid_ipv6(resource['address_list'][0]['addr']))
+      for other_resource in resource_list[i + 1:]:
+        self.assertNotEqual(
+            resource['ipv6_range']['addr'],
+            other_resource['ipv6_range']['addr'])
+        self.assertNotEqual(
+            resource['address_list'][0]['addr'],
+            other_resource['address_list'][0]['addr'])
+
+  def test_format_ipv6_small_range(self):
+    standalone = self.setupSimpleStandalone()
+    prefixlen = 112
+    slapos_fake_ipv6_range = '%s/%d' % (SLAPOS_TEST_IPV6, prefixlen)
+    addr0 = str(netaddr.IPNetwork(slapos_fake_ipv6_range).network)
+    standalone.format(3, SLAPOS_TEST_IPV4, slapos_fake_ipv6_range)
+    resource_list = self.getJsonResourceList(standalone)
+    for i, resource in enumerate(resource_list):
+      self.assertFalse(resource['ipv6_range'])
+      self.assertTrue(netaddr.valid_ipv6(resource['address_list'][0]['addr']))
+      for other_resource in resource_list[i + 1:]:
+        self.assertNotEqual(
+            resource['address_list'][0]['addr'],
+            other_resource['address_list'][0]['addr'])
+        self.assertNotEqual(
+            resource['address_list'][0]['addr'],
+            addr0)
+
+  def test_format_ipv6_very_small_range(self):
+    standalone = self.setupSimpleStandalone()
+    prefixlen = 126
+    slapos_fake_ipv6_range = '%s/%d' % (SLAPOS_TEST_IPV6, prefixlen)
+    addr0 = str(netaddr.IPNetwork(slapos_fake_ipv6_range).network)
+    standalone.format(8, SLAPOS_TEST_IPV4, slapos_fake_ipv6_range)
+    resource_list = self.getJsonResourceList(standalone)
+    for i, resource in enumerate(resource_list):
+      self.assertFalse(resource['ipv6_range'])
+      self.assertTrue(netaddr.valid_ipv6(resource['address_list'][0]['addr']))
+      for j, other_resource in enumerate(resource_list[i + 1:]):
+        self.assertNotEqual(
+            resource['address_list'][0]['addr'],
+            addr0)
+        if j % 2 == 1:
+          self.assertEqual(
+              resource['address_list'][0]['addr'],
+              other_resource['address_list'][0]['addr'])
+        else:
+          self.assertNotEqual(
+              resource['address_list'][0]['addr'],
+              other_resource['address_list'][0]['addr'])
+
+  def test_format_ipv6_slapsh_128_range(self):
+    standalone = self.setupSimpleStandalone()
+    prefixlen = 128
+    slapos_fake_ipv6_range = '%s/%d' % (SLAPOS_TEST_IPV6, prefixlen)
+    standalone.format(3, SLAPOS_TEST_IPV4, slapos_fake_ipv6_range)
+    resource_list = self.getJsonResourceList(standalone)
+    for i, resource in enumerate(resource_list):
+      self.assertFalse(resource['ipv6_range'])
+      self.assertTrue(netaddr.valid_ipv6(resource['address_list'][0]['addr']))
+      self.assertEqual(
+          resource['address_list'][0]['addr'],
+          SLAPOS_TEST_IPV6)
 
-    self.assertTrue(os.path.exists(standalone.software_directory))
-    self.assertTrue(os.path.exists(standalone.instance_directory))
-    self.assertTrue(
-        os.path.exists(
-            os.path.join(standalone.instance_directory, 'slappart0')))
-    self.assertTrue(
-        os.path.exists(
-            os.path.join(standalone.instance_directory, 'slappart1')))
-    self.assertTrue(
-        os.path.exists(
-            os.path.join(standalone.instance_directory, 'slappart2')))
+  def test_format_ipv6_no_range(self):
+    standalone = self.setupSimpleStandalone()
+    standalone.format(3, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
+    resource_list = self.getJsonResourceList(standalone)
+    for i, resource in enumerate(resource_list):
+      self.assertFalse(resource['ipv6_range'])
+      self.assertTrue(netaddr.valid_ipv6(resource['address_list'][0]['addr']))
+      for other_resource in resource_list[i + 1:]:
+        self.assertEqual(
+            resource['address_list'][0]['addr'],
+            SLAPOS_TEST_IPV6)
 
   def test_reformat_less_partitions(self):
-    working_dir = tempfile.mkdtemp(prefix=__name__)
-    self.addCleanup(slapos.util.rmtree, working_dir)
-    standalone = StandaloneSlapOS(
-        working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
-    self.addCleanup(standalone.stop)
+    standalone = self.setupSimpleStandalone()
     standalone.format(2, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
     standalone.format(1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
-    self.assertFalse(
-        os.path.exists(
-            os.path.join(standalone.instance_directory, 'slappart1')))
+    self.assertNotExists(
+        os.path.join(standalone.instance_directory, 'slappart1'))
     self.assertEqual(
         ['slappart0'],
         [cp.getId() for cp in standalone.computer.getComputerPartitionList()])
 
   def test_reformat_less_chmod_files(self):
-    working_dir = tempfile.mkdtemp(prefix=__name__)
-    self.addCleanup(slapos.util.rmtree, working_dir)
-    standalone = StandaloneSlapOS(
-        working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
-    self.addCleanup(standalone.stop)
+    standalone = self.setupSimpleStandalone()
     standalone.format(2, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
     # removing this directory should not be a problem
     chmoded_dir_path = os.path.join(standalone.instance_directory, 'slappart1', 'directory')
     os.mkdir(chmoded_dir_path)
     os.chmod(chmoded_dir_path, 0o000)
     standalone.format(1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
-    self.assertFalse(os.path.exists(chmoded_dir_path))
+    self.assertNotExists(chmoded_dir_path)
     self.assertEqual(
         ['slappart0'],
         [cp.getId() for cp in standalone.computer.getComputerPartitionList()])
 
   def test_reformat_different_base_name(self):
-    working_dir = tempfile.mkdtemp(prefix=__name__)
-    self.addCleanup(slapos.util.rmtree, working_dir)
-    standalone = StandaloneSlapOS(
-        working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
-    self.addCleanup(standalone.stop)
+    standalone = self.setupSimpleStandalone()
     standalone.format(
         1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6, partition_base_name="a")
-    self.assertTrue(
-        os.path.exists(os.path.join(standalone.instance_directory, 'a0')))
+    self.assertExists(os.path.join(standalone.instance_directory, 'a0'))
     standalone.format(
         1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6, partition_base_name="b")
-    self.assertFalse(
-        os.path.exists(os.path.join(standalone.instance_directory, 'a0')))
-    self.assertTrue(
-        os.path.exists(os.path.join(standalone.instance_directory, 'b0')))
+    self.assertNotExists(os.path.join(standalone.instance_directory, 'a0'))
+    self.assertExists(os.path.join(standalone.instance_directory, 'b0'))
     self.assertEqual(
         ['b0'],
         [cp.getId() for cp in standalone.computer.getComputerPartitionList()])
 
   def test_reformat_refuse_deleting_running_partition(self):
-    working_dir = tempfile.mkdtemp(prefix=__name__)
-    self.addCleanup(slapos.util.rmtree, working_dir)
-    standalone = StandaloneSlapOS(
-        working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
-    self.addCleanup(standalone.stop)
+    standalone = self.setupSimpleStandalone()
     standalone.format(1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
     with mock.patch("slapos.slap.ComputerPartition.getState", return_value="busy"),\
        self.assertRaisesRegex(ValueError, "Cannot reformat to remove busy partition at .*slappart0"):
       standalone.format(0, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
 
   def test_slapos_node_format(self):
-    working_dir = tempfile.mkdtemp(prefix=__name__)
-    self.addCleanup(slapos.util.rmtree, working_dir)
-    standalone = StandaloneSlapOS(
-        working_dir, SLAPOS_TEST_IPV4, SLAPOS_TEST_PORT)
-    self.addCleanup(standalone.stop)
-    self.assertTrue(os.path.exists(standalone.instance_directory))
+    standalone = self.setupSimpleStandalone()
+    self.assertExists(standalone.instance_directory)
     format_command = (standalone._slapos_wrapper, 'node', 'format', '--now')
     glob_pattern = os.path.join(standalone.instance_directory, 'slappart*')
     self.assertFalse(glob.glob(glob_pattern))
-    self.assertTrue(subprocess.call(format_command))
+    self.assertTrue(subprocess.call(format_command)) # non-zero exitcode
     self.assertFalse(glob.glob(glob_pattern))
     for partition_count in (3, 2):
       standalone.format(partition_count, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
@@ -314,10 +402,14 @@ class SlapOSStandaloneTestCase(unittest.TestCase):
                 'SLAPOS_TEST_SHARED_PART_LIST', '').split(os.pathsep) if p
         ],
     )
-    if self._auto_stop_standalone:
-      self.addCleanup(self.standalone.stop)
+    self.addCleanup(self.stopStandalone)
     self.standalone.format(1, SLAPOS_TEST_IPV4, SLAPOS_TEST_IPV6)
 
+  def stopStandalone(self):
+    if self._auto_stop_standalone:
+      self.standalone.stop()
+      self._auto_stop_standalone = False
+
 
 class TestSlapOSStandaloneLogFile(SlapOSStandaloneTestCase):
   def test_log_files(self):
@@ -448,8 +540,6 @@ class TestSlapOSStandaloneSoftware(SlapOSStandaloneTestCase):
 
 
 class TestSlapOSStandaloneInstance(SlapOSStandaloneTestCase):
-  _auto_stop_standalone = False  # we stop explicitly
-
   def test_request_instance(self):
     with tempfile.NamedTemporaryFile(suffix="-%s.cfg" % self.id()) as f:
       # This is a minimal / super fast buildout that's compatible with slapos.
@@ -564,5 +654,5 @@ class TestSlapOSStandaloneInstance(SlapOSStandaloneTestCase):
           if p['statename'] == 'RUNNING'
       ])
     self.assertEqual(set([True]), set([p.is_running() for p in process_list]))
-    self.standalone.stop()
+    self.stopStandalone()
     self.assertEqual(set([False]), set([p.is_running() for p in process_list]))

slapos/util.py

@@ -38,6 +38,7 @@ import socket
 import sqlite3
 import struct
 import subprocess
+import sys
 import warnings
 
 import jsonschema
@@ -201,7 +202,7 @@ def ipv6FromBin(ip, suffix=''):
   if suffix_len > 0:
     ip += suffix.rjust(suffix_len, '0')
   elif suffix_len:
-    sys.exit("Prefix exceeds 128 bits")
+    sys.exit("Prefix %s exceeds 128 bits by %d bit" % (ip, -suffix_len))
   return socket.inet_ntop(socket.AF_INET6,
     struct.pack('>QQ', int(ip[:64], 2), int(ip[64:], 2)))
 
@@ -214,11 +215,23 @@ def getPartitionIpv6Addr(ipv6_range, partition_index):
   }
   returns the IPv6 addr
   addr::(partition_index+2) (address 1 is is used by re6st)
+  If the range is too small, wrap around
   """
   addr = ipv6_range['addr']
   prefixlen = ipv6_range['prefixlen']
   prefix = binFromIpv6(addr)[:prefixlen]
-  return dict(addr=ipv6FromBin(prefix + bin(partition_index+2)[2:].zfill(128 - prefixlen)), prefixlen=prefixlen)
+  remaining = 128 - prefixlen
+  suffix = bin(partition_index+2)[2:]
+  if len(suffix) > remaining:
+    if remaining >= 2:
+      # skip reserved addresses 0 and 1
+      suffix = bin((partition_index % ((1 << remaining) - 2)) + 2)[2:]
+    else:
+      # truncate, we have no other addresses than 0 and 1
+      suffix = suffix[len(suffix) - remaining:]
+  suffix = suffix.zfill(remaining)
+  bits = prefix + suffix
+  return dict(addr=ipv6FromBin(bits), prefixlen=prefixlen)
 
 def getIpv6RangeFactory(k, s):
   """