From 8741bba1983532e6aefa78f350fdae91b8b151a1 Mon Sep 17 00:00:00 2001

From: Andreas Karis <akaris@redhat.com>

Date: Fri, 21 Apr 2017 20:35:39 -0400

Subject: [PATCH] Fix dual stack IPv4/IPv6 configuration for RHEL

Dual stack IPv4/IPv6 configuration via config drive is broken for RHEL7.

This patch fixes several scenarios for IPv4/IPv6/dual stack with multiple IP assignment

Removes unpopular IPv4 alias files and invalid IPv6 alias files

Also fixes associated unit tests

LP: #1679817

LP: #1685534

LP: #1685532

Resolves: rhbz#1438082

X-approved-upstream: true

---

 cloudinit/net/sysconfig.py                     | 244 ++++++++++++++++++-------

 tests/unittests/test_distros/test_netconfig.py | 139 +++++++++++++-

 tests/unittests/test_net.py                    | 144 ++++++++++++++-

 3 files changed, 455 insertions(+), 72 deletions(-)

diff --git a/cloudinit/net/sysconfig.py b/cloudinit/net/sysconfig.py

index d521d5c..240ed23 100644

--- a/cloudinit/net/sysconfig.py

+++ b/cloudinit/net/sysconfig.py

@@ -58,6 +58,9 @@ class ConfigMap(object):

     def __setitem__(self, key, value):

         self._conf[key] = value

+    def __getitem__(self, key):

+        return self._conf[key]

+

     def drop(self, key):

         self._conf.pop(key, None)

@@ -82,7 +85,8 @@ class ConfigMap(object):

 class Route(ConfigMap):

     """Represents a route configuration."""

-    route_fn_tpl = '%(base)s/network-scripts/route-%(name)s'

+    route_fn_tpl_ipv4 = '%(base)s/network-scripts/route-%(name)s'

+    route_fn_tpl_ipv6 = '%(base)s/network-scripts/route6-%(name)s'

     def __init__(self, route_name, base_sysconf_dir):

         super(Route, self).__init__()

@@ -101,9 +105,58 @@ class Route(ConfigMap):

         return r

     @property

-    def path(self):

-        return self.route_fn_tpl % ({'base': self._base_sysconf_dir,

-                                     'name': self._route_name})

+    def path_ipv4(self):

+        return self.route_fn_tpl_ipv4 % ({'base': self._base_sysconf_dir,

+                                          'name': self._route_name})

+

+    @property

+    def path_ipv6(self):

+        return self.route_fn_tpl_ipv6 % ({'base': self._base_sysconf_dir,

+                                          'name': self._route_name})

+

+    def is_ipv6_route(self, address):

+        return ':' in address

+

+    def to_string(self, proto="ipv4"):

+        # only accept ipv4 and ipv6

+        if proto not in ['ipv4', 'ipv6']:

+            raise ValueError("Unknown protocol '%s'" % (str(proto)))

+        buf = six.StringIO()

+        buf.write(_make_header())

+        if self._conf:

+            buf.write("\n")

+        # need to reindex IPv4 addresses

+        # (because Route can contain a mix of IPv4 and IPv6)

+        reindex = -1

+        for key in sorted(self._conf.keys()):

+            if 'ADDRESS' in key:

+                index = key.replace('ADDRESS', '')

+                address_value = str(self._conf[key])

+                # only accept combinations:

+                # if proto ipv6 only display ipv6 routes

+                # if proto ipv4 only display ipv4 routes

+                # do not add ipv6 routes if proto is ipv4

+                # do not add ipv4 routes if proto is ipv6

+                # (this array will contain a mix of ipv4 and ipv6)

+                if proto == "ipv4" and not self.is_ipv6_route(address_value):

+                    netmask_value = str(self._conf['NETMASK' + index])

+                    gateway_value = str(self._conf['GATEWAY' + index])

+                    # increase IPv4 index

+                    reindex = reindex + 1

+                    buf.write("%s=%s\n" % ('ADDRESS' + str(reindex),

+                                           _quote_value(address_value)))

+                    buf.write("%s=%s\n" % ('GATEWAY' + str(reindex),

+                                           _quote_value(gateway_value)))

+                    buf.write("%s=%s\n" % ('NETMASK' + str(reindex),

+                                           _quote_value(netmask_value)))

+                elif proto == "ipv6" and self.is_ipv6_route(address_value):

+                    netmask_value = str(self._conf['NETMASK' + index])

+                    gateway_value = str(self._conf['GATEWAY' + index])

+                    buf.write("%s/%s via %s\n" % (address_value,

+                                                  netmask_value,

+                                                  gateway_value))

+

+        return buf.getvalue()

 class NetInterface(ConfigMap):

@@ -209,65 +262,119 @@ class Renderer(renderer.Renderer):

                 iface_cfg[new_key] = old_value

     @classmethod

-    def _render_subnet(cls, iface_cfg, route_cfg, subnet):

-        subnet_type = subnet.get('type')

-        if subnet_type == 'dhcp6':

-            iface_cfg['DHCPV6C'] = True

-            iface_cfg['IPV6INIT'] = True

-            iface_cfg['BOOTPROTO'] = 'dhcp'

-        elif subnet_type in ['dhcp4', 'dhcp']:

-            iface_cfg['BOOTPROTO'] = 'dhcp'

-        elif subnet_type == 'static':

-            iface_cfg['BOOTPROTO'] = 'static'

-            if subnet.get('ipv6'):

-                iface_cfg['IPV6ADDR'] = subnet['address']

+    def _render_subnets(cls, iface_cfg, subnets):

+        # setting base values

+        iface_cfg['BOOTPROTO'] = 'none'

+

+        # modifying base values according to subnets

+        for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):

+            subnet_type = subnet.get('type')

+            if subnet_type == 'dhcp6':

                 iface_cfg['IPV6INIT'] = True

+                iface_cfg['DHCPV6C'] = True

+                iface_cfg['BOOTPROTO'] = 'dhcp'

+            elif subnet_type in ['dhcp4', 'dhcp']:

+                iface_cfg['BOOTPROTO'] = 'dhcp'

+            elif subnet_type == 'static':

+                # grep BOOTPROTO sysconfig.txt -A2 | head -3

+                # BOOTPROTO=none|bootp|dhcp

+                # 'bootp' or 'dhcp' cause a DHCP client

+                # to run on the device. Any other

+                # value causes any static configuration

+                # in the file to be applied.

+                # ==> the following should not be set to 'static'

+                # but should remain 'none'

+                # if iface_cfg['BOOTPROTO'] == 'none':

+                #    iface_cfg['BOOTPROTO'] = 'static'

+                if subnet.get('ipv6'):

+                    iface_cfg['IPV6INIT'] = True

             else:

-                iface_cfg['IPADDR'] = subnet['address']

-        else:

-            raise ValueError("Unknown subnet type '%s' found"

-                             " for interface '%s'" % (subnet_type,

-                                                      iface_cfg.name))

-        if 'netmask' in subnet:

-            iface_cfg['NETMASK'] = subnet['netmask']

-        is_ipv6 = subnet.get('ipv6')

-        for route in subnet.get('routes', []):

-            if _is_default_route(route):

-                if (

-                        (subnet.get('ipv4') and

-                         route_cfg.has_set_default_ipv4) or

-                        (subnet.get('ipv6') and

-                         route_cfg.has_set_default_ipv6)

-                ):

-                    raise ValueError("Duplicate declaration of default "

-                                     "route found for interface '%s'"

-                                     % (iface_cfg.name))

-                # NOTE(harlowja): ipv6 and ipv4 default gateways

-                gw_key = 'GATEWAY0'

-                nm_key = 'NETMASK0'

-                addr_key = 'ADDRESS0'

-                # The owning interface provides the default route.

-                #

-                # TODO(harlowja): add validation that no other iface has

-                # also provided the default route?

-                iface_cfg['DEFROUTE'] = True

-                if 'gateway' in route:

-                    if is_ipv6:

-                        iface_cfg['IPV6_DEFAULTGW'] = route['gateway']

-                        route_cfg.has_set_default_ipv6 = True

+                raise ValueError("Unknown subnet type '%s' found"

+                                 " for interface '%s'" % (subnet_type,

+                                                          iface_cfg.name))

+

+        # set IPv4 and IPv6 static addresses

+        ipv4_index = -1

+        ipv6_index = -1

+        for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):

+            subnet_type = subnet.get('type')

+            if subnet_type == 'dhcp6':

+                continue

+            elif subnet_type in ['dhcp4', 'dhcp']:

+                continue

+            elif subnet_type == 'static':

+                if subnet.get('ipv6'):

+                    ipv6_index = ipv6_index + 1

+                    if 'netmask' in subnet and str(subnet['netmask']) != "":

+                        ipv6_cidr = (subnet['address'] +

+                                     '/' +

+                                     str(subnet['netmask']))

                     else:

-                        iface_cfg['GATEWAY'] = route['gateway']

-                        route_cfg.has_set_default_ipv4 = True

-            else:

-                gw_key = 'GATEWAY%s' % route_cfg.last_idx

-                nm_key = 'NETMASK%s' % route_cfg.last_idx

-                addr_key = 'ADDRESS%s' % route_cfg.last_idx

-                route_cfg.last_idx += 1

-            for (old_key, new_key) in [('gateway', gw_key),

-                                       ('netmask', nm_key),

-                                       ('network', addr_key)]:

-                if old_key in route:

-                    route_cfg[new_key] = route[old_key]

+                        ipv6_cidr = subnet['address']

+                    if ipv6_index == 0:

+                        iface_cfg['IPV6ADDR'] = ipv6_cidr

+                    elif ipv6_index == 1:

+                        iface_cfg['IPV6ADDR_SECONDARIES'] = ipv6_cidr

+                    else:

+                        iface_cfg['IPV6ADDR_SECONDARIES'] = (

+                            iface_cfg['IPV6ADDR_SECONDARIES'] +

+                            " " + ipv6_cidr)

+                else:

+                    ipv4_index = ipv4_index + 1

+                    if ipv4_index == 0:

+                        iface_cfg['IPADDR'] = subnet['address']

+                        if 'netmask' in subnet:

+                            iface_cfg['NETMASK'] = subnet['netmask']

+                    else:

+                        iface_cfg['IPADDR' + str(ipv4_index)] = \

+                            subnet['address']

+                        if 'netmask' in subnet:

+                            iface_cfg['NETMASK' + str(ipv4_index)] = \

+                                subnet['netmask']

+

+    @classmethod

+    def _render_subnet_routes(cls, iface_cfg, route_cfg, subnets):

+        for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):

+            for route in subnet.get('routes', []):

+                is_ipv6 = subnet.get('ipv6')

+

+                if _is_default_route(route):

+                    if (

+                            (subnet.get('ipv4') and

+                             route_cfg.has_set_default_ipv4) or

+                            (subnet.get('ipv6') and

+                             route_cfg.has_set_default_ipv6)

+                    ):

+                        raise ValueError("Duplicate declaration of default "

+                                         "route found for interface '%s'"

+                                         % (iface_cfg.name))

+                    # NOTE(harlowja): ipv6 and ipv4 default gateways

+                    gw_key = 'GATEWAY0'

+                    nm_key = 'NETMASK0'

+                    addr_key = 'ADDRESS0'

+                    # The owning interface provides the default route.

+                    #

+                    # TODO(harlowja): add validation that no other iface has

+                    # also provided the default route?

+                    iface_cfg['DEFROUTE'] = True

+                    if 'gateway' in route:

+                        if is_ipv6:

+                            iface_cfg['IPV6_DEFAULTGW'] = route['gateway']

+                            route_cfg.has_set_default_ipv6 = True

+                        else:

+                            iface_cfg['GATEWAY'] = route['gateway']

+                            route_cfg.has_set_default_ipv4 = True

+

+                else:

+                    gw_key = 'GATEWAY%s' % route_cfg.last_idx

+                    nm_key = 'NETMASK%s' % route_cfg.last_idx

+                    addr_key = 'ADDRESS%s' % route_cfg.last_idx

+                    route_cfg.last_idx += 1

+                for (old_key, new_key) in [('gateway', gw_key),

+                                           ('netmask', nm_key),

+                                           ('network', addr_key)]:

+                    if old_key in route:

+                        route_cfg[new_key] = route[old_key]

     @classmethod

     def _render_bonding_opts(cls, iface_cfg, iface):

@@ -293,15 +400,9 @@ class Renderer(renderer.Renderer):

             iface_subnets = iface.get("subnets", [])

             iface_cfg = iface_contents[iface_name]

             route_cfg = iface_cfg.routes

-            if len(iface_subnets) == 1:

-                cls._render_subnet(iface_cfg, route_cfg, iface_subnets[0])

-            elif len(iface_subnets) > 1:

-                for i, iface_subnet in enumerate(iface_subnets,

-                                                 start=len(iface_cfg.children)):

-                    iface_sub_cfg = iface_cfg.copy()

-                    iface_sub_cfg.name = "%s:%s" % (iface_name, i)

-                    iface_cfg.children.append(iface_sub_cfg)

-                    cls._render_subnet(iface_sub_cfg, route_cfg, iface_subnet)

+

+            cls._render_subnets(iface_cfg, iface_subnets)

+            cls._render_subnet_routes(iface_cfg, route_cfg, iface_subnets)

     @classmethod

     def _render_bond_interfaces(cls, network_state, iface_contents):

@@ -383,7 +484,10 @@ class Renderer(renderer.Renderer):

                     if iface_cfg:

                         contents[iface_cfg.path] = iface_cfg.to_string()

             if iface_cfg.routes:

-                contents[iface_cfg.routes.path] = iface_cfg.routes.to_string()

+                contents[iface_cfg.routes.path_ipv4] = \

+                    iface_cfg.routes.to_string("ipv4")

+                contents[iface_cfg.routes.path_ipv6] = \

+                    iface_cfg.routes.to_string("ipv6")

         return contents

     def render_network_state(self, target, network_state):

diff --git a/tests/unittests/test_distros/test_netconfig.py b/tests/unittests/test_distros/test_netconfig.py

index bde3bb5..85982cf 100644

--- a/tests/unittests/test_distros/test_netconfig.py

+++ b/tests/unittests/test_distros/test_netconfig.py

@@ -195,6 +195,76 @@ NETWORKING=yes

             self.assertCfgEquals(expected_buf, str(write_buf))

             self.assertEqual(write_buf.mode, 0o644)

+    def test_apply_network_config_rh(self):

+        rh_distro = self._get_distro('rhel')

+

+        write_bufs = {}

+

+        def replace_write(filename, content, mode=0o644, omode="wb"):

+            buf = WriteBuffer()

+            buf.mode = mode

+            buf.omode = omode

+            buf.write(content)

+            write_bufs[filename] = buf

+

+        with ExitStack() as mocks:

+            # sysconfig availability checks

+            mocks.enter_context(

+                mock.patch.object(util, 'which', return_value=True))

+            mocks.enter_context(

+                mock.patch.object(util, 'write_file', replace_write))

+            mocks.enter_context(

+                mock.patch.object(util, 'load_file', return_value=''))

+            mocks.enter_context(

+                mock.patch.object(os.path, 'isfile', return_value=True))

+

+            rh_distro.apply_network_config(V1_NET_CFG, False)

+

+            self.assertEqual(len(write_bufs), 5)

+

+            # eth0

+            self.assertIn('/etc/sysconfig/network-scripts/ifcfg-eth0',

+                          write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network-scripts/ifcfg-eth0']

+            expected_buf = '''

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=none

+DEVICE=eth0

+IPADDR=192.168.1.5

+NETMASK=255.255.255.0

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+

+            # eth1

+            self.assertIn('/etc/sysconfig/network-scripts/ifcfg-eth1',

+                          write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network-scripts/ifcfg-eth1']

+            expected_buf = '''

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=dhcp

+DEVICE=eth1

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+

+            self.assertIn('/etc/sysconfig/network', write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network']

+            expected_buf = '''

+# Created by cloud-init v. 0.7

+NETWORKING=yes

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+

     def test_write_ipv6_rhel(self):

         rh_distro = self._get_distro('rhel')

@@ -214,7 +284,6 @@ NETWORKING=yes

                 mock.patch.object(util, 'load_file', return_value=''))

             mocks.enter_context(

                 mock.patch.object(os.path, 'isfile', return_value=False))

-

             rh_distro.apply_network(BASE_NET_CFG_IPV6, False)

             self.assertEqual(len(write_bufs), 4)

@@ -274,6 +343,74 @@ IPV6_AUTOCONF=no

             self.assertCfgEquals(expected_buf, str(write_buf))

             self.assertEqual(write_buf.mode, 0o644)

+    def test_apply_network_config_ipv6_rh(self):

+        rh_distro = self._get_distro('rhel')

+

+        write_bufs = {}

+

+        def replace_write(filename, content, mode=0o644, omode="wb"):

+            buf = WriteBuffer()

+            buf.mode = mode

+            buf.omode = omode

+            buf.write(content)

+            write_bufs[filename] = buf

+

+        with ExitStack() as mocks:

+            mocks.enter_context(

+                mock.patch.object(util, 'which', return_value=True))

+            mocks.enter_context(

+                mock.patch.object(util, 'write_file', replace_write))

+            mocks.enter_context(

+                mock.patch.object(util, 'load_file', return_value=''))

+            mocks.enter_context(

+                mock.patch.object(os.path, 'isfile', return_value=True))

+

+            rh_distro.apply_network_config(V1_NET_CFG_IPV6, False)

+

+            self.assertEqual(len(write_bufs), 5)

+

+            self.assertIn('/etc/sysconfig/network-scripts/ifcfg-eth0',

+                          write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network-scripts/ifcfg-eth0']

+            expected_buf = '''

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=none

+DEVICE=eth0

+IPV6ADDR=2607:f0d0:1002:0011::2/64

+IPV6INIT=yes

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+            self.assertIn('/etc/sysconfig/network-scripts/ifcfg-eth1',

+                          write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network-scripts/ifcfg-eth1']

+            expected_buf = '''

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=dhcp

+DEVICE=eth1

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+

+            self.assertIn('/etc/sysconfig/network', write_bufs)

+            write_buf = write_bufs['/etc/sysconfig/network']

+            expected_buf = '''

+# Created by cloud-init v. 0.7

+NETWORKING=yes

+NETWORKING_IPV6=yes

+IPV6_AUTOCONF=no

+'''

+            self.assertCfgEquals(expected_buf, str(write_buf))

+            self.assertEqual(write_buf.mode, 0o644)

+

     def test_simple_write_freebsd(self):

         fbsd_distro = self._get_distro('freebsd')

diff --git a/tests/unittests/test_net.py b/tests/unittests/test_net.py

index 262c6d5..172d604 100755

--- a/tests/unittests/test_net.py

+++ b/tests/unittests/test_net.py

@@ -137,7 +137,7 @@ OS_SAMPLES = [

              """

 # Created by cloud-init on instance boot automatically, do not edit.

 #

-BOOTPROTO=static

+BOOTPROTO=none

 DEFROUTE=yes

 DEVICE=eth0

 GATEWAY=172.19.3.254

@@ -165,6 +165,148 @@ nameserver 172.19.0.12

             ('etc/udev/rules.d/70-persistent-net.rules',

              "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',

                       'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]

+    },

+    {

+        'in_data': {

+            "services": [{"type": "dns", "address": "172.19.0.12"}],

+            "networks": [{

+                "network_id": "public-ipv4",

+                "type": "ipv4", "netmask": "255.255.252.0",

+                "link": "tap1a81968a-79",

+                "routes": [{

+                    "netmask": "0.0.0.0",

+                    "network": "0.0.0.0",

+                    "gateway": "172.19.3.254",

+                }],

+                "ip_address": "172.19.1.34", "id": "network0"

+            }, {

+                "network_id": "private-ipv4",

+                "type": "ipv4", "netmask": "255.255.255.0",

+                "link": "tap1a81968a-79",

+                "routes": [],

+                "ip_address": "10.0.0.10", "id": "network1"

+            }],

+            "links": [

+                {

+                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",

+                    "mtu": None, "type": "bridge", "id":

+                    "tap1a81968a-79",

+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"

+                },

+            ],

+        },

+        'in_macs': {

+            'fa:16:3e:ed:9a:59': 'eth0',

+        },

+        'out_sysconfig': [

+            ('etc/sysconfig/network-scripts/ifcfg-eth0',

+             """

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=none

+DEFROUTE=yes

+DEVICE=eth0

+GATEWAY=172.19.3.254

+HWADDR=fa:16:3e:ed:9a:59

+IPADDR=172.19.1.34

+IPADDR1=10.0.0.10

+NETMASK=255.255.252.0

+NETMASK1=255.255.255.0

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+""".lstrip()),

+            ('etc/resolv.conf',

+             """

+; Created by cloud-init on instance boot automatically, do not edit.

+;

+nameserver 172.19.0.12

+""".lstrip()),

+            ('etc/udev/rules.d/70-persistent-net.rules',

+             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',

+                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]

+    },

+    {

+        'in_data': {

+            "services": [{"type": "dns", "address": "172.19.0.12"}],

+            "networks": [{

+                "network_id": "public-ipv4",

+                "type": "ipv4", "netmask": "255.255.252.0",

+                "link": "tap1a81968a-79",

+                "routes": [{

+                    "netmask": "0.0.0.0",

+                    "network": "0.0.0.0",

+                    "gateway": "172.19.3.254",

+                }],

+                "ip_address": "172.19.1.34", "id": "network0"

+            }, {

+                "network_id": "public-ipv6-a",

+                "type": "ipv6", "netmask": "",

+                "link": "tap1a81968a-79",

+                "routes": [

+                    {

+                        "gateway": "2001:DB8::1",

+                        "netmask": "::",

+                        "network": "::"

+                    }

+                ],

+                "ip_address": "2001:DB8::10", "id": "network1"

+            }, {

+                "network_id": "public-ipv6-b",

+                "type": "ipv6", "netmask": "64",

+                "link": "tap1a81968a-79",

+                "routes": [

+                ],

+                "ip_address": "2001:DB9::10", "id": "network2"

+            }, {

+                "network_id": "public-ipv6-c",

+                "type": "ipv6", "netmask": "64",

+                "link": "tap1a81968a-79",

+                "routes": [

+                ],

+                "ip_address": "2001:DB10::10", "id": "network3"

+            }],

+            "links": [

+                {

+                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",

+                    "mtu": None, "type": "bridge", "id":

+                    "tap1a81968a-79",

+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"

+                },

+            ],

+        },

+        'in_macs': {

+            'fa:16:3e:ed:9a:59': 'eth0',

+        },

+        'out_sysconfig': [

+            ('etc/sysconfig/network-scripts/ifcfg-eth0',

+             """

+# Created by cloud-init on instance boot automatically, do not edit.

+#

+BOOTPROTO=none

+DEFROUTE=yes

+DEVICE=eth0

+GATEWAY=172.19.3.254

+HWADDR=fa:16:3e:ed:9a:59

+IPADDR=172.19.1.34

+IPV6ADDR=2001:DB8::10

+IPV6ADDR_SECONDARIES="2001:DB9::10/64 2001:DB10::10/64"

+IPV6INIT=yes

+IPV6_DEFAULTGW=2001:DB8::1

+NETMASK=255.255.252.0

+ONBOOT=yes

+TYPE=Ethernet

+USERCTL=no

+""".lstrip()),

+            ('etc/resolv.conf',

+             """

+; Created by cloud-init on instance boot automatically, do not edit.

+;

+nameserver 172.19.0.12

+""".lstrip()),

+            ('etc/udev/rules.d/70-persistent-net.rules',

+             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',

+                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]

     }

 ]