Scenario test for port forwarding

This patch adds new scenario test for port forwarding functionality.
It creates 1 floating IP, and 1 router, then spawns 2 VMs and configure
2 port forwardings using created floating IP and VMs.
Those 2 port forwardings allows to SSH with 2 different ports to 2
different VMs using same floating IP.

Change-Id: Ie5475c797113cfc5c9bfaf4bbd58c211ed30bc89

.zuul.yaml

@@ -526,6 +526,7 @@
         neutron-segments: true
         neutron-trunk: true
         neutron-log: true
+        neutron-port-forwarding: true
         cinder: true
       devstack_local_conf:
         post-config:
@@ -588,6 +589,7 @@
           neutron-qos: true
           neutron-trunk: true
           neutron-log: true
+          neutron-port-forwarding: true
         devstack_local_conf:
           post-config:
             $NEUTRON_CONF:

neutron_tempest_plugin/scenario/test_port_forwardings.py

@@ -0,0 +1,75 @@
+# Copyright 2019 Red Hat, Inc.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from tempest.lib.common.utils import data_utils
+from tempest.lib import decorators
+
+from neutron_tempest_plugin.common import ssh
+from neutron_tempest_plugin import config
+from neutron_tempest_plugin.scenario import base
+
+CONF = config.CONF
+
+
+class PortForwardingTestJSON(base.BaseTempestTestCase):
+
+    required_extensions = ['router', 'floating-ip-port-forwarding']
+
+    @classmethod
+    def resource_setup(cls):
+        super(PortForwardingTestJSON, cls).resource_setup()
+        cls.network = cls.create_network()
+        cls.subnet = cls.create_subnet(cls.network)
+        cls.router = cls.create_router_by_client()
+        cls.create_router_interface(cls.router['id'], cls.subnet['id'])
+        cls.fip = cls.create_floatingip()
+        cls.secgroup = cls.create_security_group(
+            name=data_utils.rand_name("test_port_secgroup"))
+        cls.create_loginable_secgroup_rule(secgroup_id=cls.secgroup['id'])
+        cls.keypair = cls.create_keypair()
+
+    @decorators.idempotent_id('ab40fc48-ca8d-41a0-b2a3-f6679c847bfe')
+    def test_port_forwarding_to_2_servers(self):
+        internal_tcp_port = 22
+        servers = []
+        for i in range(1, 3):
+            external_tcp_port = 1000 + i
+            name = data_utils.rand_name("server-%s" % i)
+            port = self.create_port(
+                self.network,
+                security_groups=[self.secgroup['id']])
+            server = self.create_server(
+                flavor_ref=CONF.compute.flavor_ref,
+                image_ref=CONF.compute.image_ref,
+                key_name=self.keypair['name'], name=name,
+                networks=[{'port': port['id']}])['server']
+            server['name'] = name
+            self.wait_for_server_active(server)
+            server['port_forwarding'] = self.create_port_forwarding(
+                self.fip['id'],
+                internal_port_id=port['id'],
+                internal_ip_address=port['fixed_ips'][0]['ip_address'],
+                internal_port=internal_tcp_port,
+                external_port=external_tcp_port,
+                protocol="tcp")
+            servers.append(server)
+
+        for server in servers:
+            ssh_client = ssh.Client(
+                self.fip['floating_ip_address'],
+                CONF.validation.image_ssh_user,
+                pkey=self.keypair['private_key'],
+                port=server['port_forwarding']['external_port'])
+            self.assertIn(server['name'], ssh_client.exec_command('hostname'))