Intra-Data Center ECMP testcase

This testcase add a scenario in which one extra route can be reachable
through two VMs which are in a same network attached to a router which
is later associated to a BGPVPN instance.
This extra route ip address is different from subnet of VMs.

After the extra route is configured with VM ips as nexthops, then when
third VM is trying to reach extra route, traffic would split between two
VMs. The traffic split can happen only in heavy loaded scenario, so this
testcase would test only reachability.

JIRA: SDNVPN-23

Change-Id: I4bb4e94f5c98c0f3c22bff7a6998af2a7a919f16
Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>

2 files changed, 236 insertions, 0 deletions

diff --git a/sdnvpn/test/functest/config.yaml b/sdnvpn/test/functest/config.yaml
index c50c619..a5f4782 100644
--- a/sdnvpn/test/functest/config.yaml
+++ b/sdnvpn/test/functest/config.yaml
@@ -189,3 +189,32 @@ testcases:
       subnet_1_cidr: 10.10.10.0/24
       secgroup_name: sdnvpn-sg
       secgroup_descr: Security group for SDNVPN test cases
+
+  sdnvpn.test.functest.testcase_13:
+      enabled: true
+      description: Testing extra route ECMP for intra-data center scenario
+      instance_1_name: sdnvpn-13-1
+      instance_2_name: sdnvpn-13-2
+      instance_3_name: sdnvpn-13-3
+      image_name: sdnvpn-image
+      net_1_name: sdnvpn-13-1-net
+      subnet_1_name: sdnvpn-13-1-subnet
+      subnet_1_cidr: 10.10.10.0/24
+      router_1_name: sdnvpn-13-1-router
+      net_2_name: sdnvpn-13-2-net
+      subnet_2_name: sdnvpn-13-2-subnet
+      subnet_2_cidr: 10.10.11.0/24
+      router_2_name: sdnvpn-13-2-router
+      interface_name: lo
+      interface_number: 1
+      extra_route_cidr: 179.24.1.12/32
+      extra_route_ip: 179.24.1.12
+      extra_route_subnet_mask: 255.255.255.255
+      extra_route_name: sdnvpn_extra_route_13
+      secgroup_name: sdnvpn-sg
+      secgroup_descr: Security group for SDNVPN test cases
+      targets1: '88:88'
+      targets2: '88:88'
+      route_distinguishers:
+          - '12:12'
+          - '13:13'
diff --git a/sdnvpn/test/functest/testcase_13.py b/sdnvpn/test/functest/testcase_13.py
new file mode 100644
index 0000000..ec0459d
--- /dev/null
+++ b/sdnvpn/test/functest/testcase_13.py
@@ -0,0 +1,207 @@
+#!/usr/bin/python
+#
+# Copyright (c) 2017 All rights reserved
+# This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+
+import logging
+import sys
+
+from functest.utils import openstack_utils as os_utils
+from random import randint
+from sdnvpn.lib import config as sdnvpn_config
+from sdnvpn.lib import utils as test_utils
+from sdnvpn.lib.results import Results
+
+logger = logging.getLogger(__name__)
+
+COMMON_CONFIG = sdnvpn_config.CommonConfig()
+TESTCASE_CONFIG = sdnvpn_config.TestcaseConfig(
+    'sdnvpn.test.functest.testcase_13')
+
+
+def main():
+    results = Results(COMMON_CONFIG.line_length)
+
+    results.add_to_summary(0, "=")
+    results.add_to_summary(2, "STATUS", "SUBTEST")
+    results.add_to_summary(0, "=")
+
+    nova_client = os_utils.get_nova_client()
+    neutron_client = os_utils.get_neutron_client()
+    glance_client = os_utils.get_glance_client()
+
+    (floatingip_ids, instance_ids, router_ids, network_ids, image_ids,
+     subnet_ids, interfaces, bgpvpn_ids, flavor_ids) = ([] for i in range(9))
+
+    try:
+        image_id = os_utils.create_glance_image(
+            glance_client,
+            COMMON_CONFIG.ubuntu_image_name,
+            COMMON_CONFIG.ubuntu_image_path,
+            disk="qcow2",
+            container="bare",
+            public="public")
+        image_ids.append(image_id)
+
+        _, flavor_id = test_utils.create_custom_flavor()
+        flavor_ids.append(flavor_id)
+
+        network_1_id, subnet_1_id, router_1_id = test_utils.create_network(
+            neutron_client,
+            TESTCASE_CONFIG.net_1_name,
+            TESTCASE_CONFIG.subnet_1_name,
+            TESTCASE_CONFIG.subnet_1_cidr,
+            TESTCASE_CONFIG.router_1_name)
+
+        interfaces.append(tuple((router_1_id, subnet_1_id)))
+        network_ids.extend([network_1_id])
+        subnet_ids.extend([subnet_1_id])
+        router_ids.extend([router_1_id])
+
+        sg_id = os_utils.create_security_group_full(
+            neutron_client, TESTCASE_CONFIG.secgroup_name,
+            TESTCASE_CONFIG.secgroup_descr)
+
+        compute_nodes = test_utils.assert_and_get_compute_nodes(nova_client)
+
+        av_zone_1 = "nova:" + compute_nodes[0]
+        av_zone_2 = "nova:" + compute_nodes[1]
+
+        u1 = test_utils.generate_userdata_interface_create(
+            TESTCASE_CONFIG.interface_name,
+            TESTCASE_CONFIG.interface_number,
+            TESTCASE_CONFIG.extra_route_ip,
+            TESTCASE_CONFIG.extra_route_subnet_mask)
+        # boot INTANCES
+        vm_1 = test_utils.create_instance(
+            nova_client,
+            TESTCASE_CONFIG.instance_1_name,
+            image_id,
+            network_1_id,
+            sg_id,
+            flavor=COMMON_CONFIG.custom_flavor_name,
+            secgroup_name=TESTCASE_CONFIG.secgroup_name,
+            compute_node=av_zone_1,
+            userdata=u1)
+        vm_1_ip = test_utils.get_instance_ip(vm_1)
+
+        vm1_port = test_utils.get_port(neutron_client, vm_1.id)
+        test_utils.update_port_allowed_address_pairs(
+            neutron_client,
+            vm1_port['id'],
+            [test_utils.AllowedAddressPair(
+                TESTCASE_CONFIG.extra_route_cidr,
+                vm1_port['mac_address'])])
+
+        vm_2 = test_utils.create_instance(
+            nova_client,
+            TESTCASE_CONFIG.instance_2_name,
+            image_id,
+            network_1_id,
+            sg_id,
+            flavor=COMMON_CONFIG.custom_flavor_name,
+            secgroup_name=TESTCASE_CONFIG.secgroup_name,
+            compute_node=av_zone_1,
+            userdata=u1)
+        vm_2_ip = test_utils.get_instance_ip(vm_2)
+
+        vm2_port = test_utils.get_port(neutron_client, vm_2.id)
+        test_utils.update_port_allowed_address_pairs(
+            neutron_client,
+            vm2_port['id'],
+            [test_utils.AllowedAddressPair(
+                TESTCASE_CONFIG.extra_route_cidr,
+                vm2_port['mac_address'])])
+
+        test_utils.async_Wait_for_instances([vm_1, vm_2])
+
+        msg = ("Create VPN with multiple RDs")
+        results.record_action(msg)
+        vpn_name = "sdnvpn-" + str(randint(100000, 999999))
+        kwargs = {
+            "import_targets": TESTCASE_CONFIG.targets1,
+            "export_targets": TESTCASE_CONFIG.targets2,
+            "route_distinguishers": TESTCASE_CONFIG.route_distinguishers,
+            "name": vpn_name
+        }
+        bgpvpn = test_utils.create_bgpvpn(neutron_client, **kwargs)
+        bgpvpn_id = bgpvpn['bgpvpn']['id']
+        logger.debug("VPN created details: %s" % bgpvpn)
+        bgpvpn_ids.append(bgpvpn_id)
+
+        msg = ("Associate router '%s' to the VPN." %
+               TESTCASE_CONFIG.router_1_name)
+        results.record_action(msg)
+        results.add_to_summary(0, "-")
+
+        test_utils.create_router_association(
+            neutron_client, bgpvpn_id, router_1_id)
+
+        test_utils.update_router_extra_route(
+            neutron_client, router_1_id,
+            [test_utils.ExtraRoute(TESTCASE_CONFIG.extra_route_cidr,
+                                   vm_1_ip),
+             test_utils.ExtraRoute(TESTCASE_CONFIG.extra_route_cidr,
+                                   vm_2_ip)])
+
+        image_2_id = os_utils.create_glance_image(
+            glance_client, TESTCASE_CONFIG.image_name,
+            COMMON_CONFIG.image_path, disk=COMMON_CONFIG.image_format,
+            container="bare", public='public')
+        image_ids.append(image_2_id)
+
+        logger.info("Waiting for the VMs to connect to each other using the"
+                    " updated network configuration")
+        test_utils.wait_before_subtest()
+
+        u3 = test_utils.generate_ping_userdata(
+            [TESTCASE_CONFIG.extra_route_ip])
+        vm_3 = test_utils.create_instance(
+            nova_client,
+            TESTCASE_CONFIG.instance_3_name,
+            image_2_id,
+            network_1_id,
+            sg_id,
+            flavor=COMMON_CONFIG.custom_flavor_name,
+            secgroup_name=TESTCASE_CONFIG.secgroup_name,
+            compute_node=av_zone_2,
+            userdata=u3)
+
+        instance_ids.extend([vm_1.id, vm_2.id, vm_3.id])
+
+        instance_dhcp_up = test_utils.wait_for_instances_get_dhcp(vm_3)
+
+        if (not instance_dhcp_up):
+            logger.error("vm_3 instance is down")
+
+        results.get_ping_status_target_ip(vm_3,
+                                          TESTCASE_CONFIG.extra_route_name,
+                                          TESTCASE_CONFIG.extra_route_ip,
+                                          expected="PASS",
+                                          timeout=300)
+
+        results.add_to_summary(0, "=")
+        logger.info("\n%s" % results.summary)
+
+    except Exception as e:
+        logger.error("exception occurred while executing testcase_13: %s", e)
+        raise
+    finally:
+        test_utils.update_router_no_extra_route(neutron_client, router_ids)
+        test_utils.cleanup_nova(nova_client, instance_ids)
+        test_utils.cleanup_glance(glance_client, image_ids)
+        test_utils.cleanup_neutron(neutron_client, floatingip_ids,
+                                   bgpvpn_ids, interfaces, subnet_ids,
+                                   router_ids, network_ids)
+
+    return results.compile_summary()
+
+
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.INFO)
+    sys.exit(main())