From 2bc7367cc90b44d4ba2fa12983c6dcf6661e587b Mon Sep 17 00:00:00 2001
From: Slawek Kaplonski <skaplons@redhat.com>
Date: Tue, 27 Oct 2020 13:06:08 +0100
Subject: [PATCH] [Scenario] New test to check extra_dhcp_opts

This patch adds new scenario test which spawns vm attached to the
neutron port with specified extra_dhcp_opts and then asserts that
option was correctly passed and configured inside guest VM.

Change-Id: I16a4ce814b9de9fe8e1bb736d28c048f04e5a5d3
---
 neutron_tempest_plugin/scenario/test_dhcp.py | 94 ++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 neutron_tempest_plugin/scenario/test_dhcp.py

diff --git a/neutron_tempest_plugin/scenario/test_dhcp.py b/neutron_tempest_plugin/scenario/test_dhcp.py
new file mode 100644
index 00000000..b95eaa28
--- /dev/null
+++ b/neutron_tempest_plugin/scenario/test_dhcp.py
@@ -0,0 +1,94 @@
+# 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 oslo_log import log
+from paramiko import ssh_exception as ssh_exc
+from tempest.common import utils
+from tempest.lib.common.utils import data_utils
+from tempest.lib import decorators
+from tempest.lib import exceptions as lib_exc
+
+from neutron_tempest_plugin.common import ssh
+from neutron_tempest_plugin import config
+from neutron_tempest_plugin.scenario import base
+
+CONF = config.CONF
+LOG = log.getLogger(__name__)
+
+
+class DHCPTest(base.BaseTempestTestCase):
+
+    credentials = ['primary', 'admin']
+    force_tenant_isolation = False
+
+    @classmethod
+    def resource_setup(cls):
+        super(DHCPTest, cls).resource_setup()
+        cls.rand_name = data_utils.rand_name(
+            cls.__name__.rsplit('.', 1)[-1])
+        cls.network = cls.create_network(name=cls.rand_name)
+        cls.subnet = cls.create_subnet(
+            network=cls.network, name=cls.rand_name)
+        cls.router = cls.create_router_by_client()
+        cls.create_router_interface(cls.router['id'], cls.subnet['id'])
+        cls.keypair = cls.create_keypair(name=cls.rand_name)
+        cls.security_group = cls.create_security_group(name=cls.rand_name)
+        cls.create_loginable_secgroup_rule(cls.security_group['id'])
+
+    @utils.requires_ext(extension='extra_dhcp_opt', service='network')
+    @decorators.idempotent_id('58f7c094-1980-4e03-b0d3-6c4dd27217b1')
+    def test_extra_dhcp_opts(self):
+        """This test case tests DHCP extra options configured for Neutron port.
+
+        Test is checking just extra option "15" which is domain-name
+        according to the RFC 2132:
+        https://tools.ietf.org/html/rfc2132#section-5.3
+
+        To test that option, there is spawned VM connected to the port with
+        configured extra_dhcp_opts and test asserts that search domain name is
+        configured inside VM in /etc/resolv.conf file
+        """
+
+        test_domain = "test.domain"
+        extra_dhcp_opts = [
+            {'opt_name': 'domain-name',
+             'opt_value': '"%s"' % test_domain}]
+        port = self.create_port(
+            network=self.network, name=self.rand_name,
+            security_groups=[self.security_group['id']],
+            extra_dhcp_opts=extra_dhcp_opts)
+        floating_ip = self.create_floatingip(port=port)
+
+        server = self.create_server(
+            flavor_ref=CONF.compute.flavor_ref,
+            image_ref=CONF.compute.image_ref,
+            key_name=self.keypair['name'],
+            networks=[{'port': port['id']}])
+        self.wait_for_server_active(server['server'])
+        self.wait_for_guest_os_ready(server['server'])
+
+        try:
+            ssh_client = ssh.Client(
+                floating_ip['floating_ip_address'],
+                CONF.validation.image_ssh_user,
+                pkey=self.keypair['private_key'])
+            vm_resolv_conf = ssh_client.exec_command(
+                "cat /etc/resolv.conf")
+            self.assertIn(test_domain, vm_resolv_conf)
+        except (lib_exc.SSHTimeout,
+                ssh_exc.AuthenticationException,
+                AssertionError) as error:
+            LOG.debug(error)
+            self._log_console_output([server])
+            self._log_local_network_status()
+            raise