scenario to create vms on single network

This creates multiple vms in a single network for each
scenario iteration run
Change-Id: Ia890defffded1e5ec235363d35a39641630574ba

browbeat-config.yaml

@@ -221,6 +221,13 @@ workloads:
         image_name: cirros
         flavor_name: m1.tiny
         file: rally/rally-plugins/netcreate-boot/netcreate_nova_boot.yml
+      - name: netcreate-boot-one-network
+        enabled: true
+        enable_dhcp: true
+        num_vms: 4
+        image_name: cirros
+        flavor_name: m1.tiny
+        file: rally/rally-plugins/netcreate-boot/netcreate_nova_boot_vms_on_single_network.yml
       - name: netcreate-boot-ping
         enabled: true
         image_name: cirros

rally/rally-plugins/netcreate-boot/netcreate_nova_boot_vms_on_single_network.py

@@ -0,0 +1,40 @@
+#   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 rally_openstack import consts
+from rally_openstack.scenarios.nova import utils as nova_utils
+from rally_openstack.scenarios.neutron import utils as neutron_utils
+from rally.task import scenario
+from rally.task import types
+from rally.task import validation
+
+
+@types.convert(image={"type": "glance_image"}, flavor={"type": "nova_flavor"})
+@validation.add("image_valid_on_flavor", flavor_param="flavor", image_param="image")
+@validation.add("required_services",services=[consts.Service.NEUTRON, consts.Service.NOVA])
+@validation.add("required_platform", platform="openstack", users=True)
+@scenario.configure(context={"cleanup@openstack": ["neutron", "nova"]},
+                    name="BrowbeatPlugin.create_vms_on_network", platform="openstack")
+class CreateVMsOnSingleNetwork(neutron_utils.NeutronScenario,
+                               nova_utils.NovaScenario):
+
+    def run(self, image, flavor, num_vms=1, network_create_args=None,
+            subnet_create_args=None, port_create_args=None, **kwargs):
+
+        network = self._create_network(network_create_args or {})
+        self._create_subnet(network, subnet_create_args or {})
+
+        for i in range(num_vms):
+            kwargs["nics"] = []
+            port = self._create_port(network, port_create_args or {})
+            kwargs["nics"].append({'port-id': port['port']['id']})
+            self._boot_server(image, flavor, **kwargs)

rally/rally-plugins/netcreate-boot/netcreate_nova_boot_vms_on_single_network.yml

@@ -0,0 +1,42 @@
+{% set image_name = image_name or 'cirros' %}
+{% set flavor_name = flavor_name or 'm1.xtiny' %}
+{% set enable_dhcp = enable_dhcp or true %}
+{% set num_vms = num_vms or 1 %}
+{% set sla_max_avg_duration = sla_max_avg_duration or 60 %}
+{% set sla_max_failure = sla_max_failure or 0 %}
+{% set sla_max_seconds = sla_max_seconds or 60 %}
+---
+BrowbeatPlugin.create_vms_on_network:
+  -
+    args:
+      flavor:
+        name: '{{flavor_name}}'
+      image:
+        name: '{{image_name}}'
+      network_create_args: {}
+      subnet_create_args: {'enable_dhcp': '{{enable_dhcp}}'}
+      port_create_args: {}
+      num_vms: {{num_vms}}
+    runner:
+      concurrency: {{concurrency}}
+      times: {{times}}
+      type: 'constant'
+    context:
+      users:
+        tenants: 1
+        users_per_tenant: 8
+      quotas:
+        neutron:
+          network: -1
+          port: -1
+          router: -1
+          subnet: -1
+        nova:
+          instances: -1
+          cores: -1
+          ram: -1
+    sla:
+      max_avg_duration: {{sla_max_avg_duration}}
+      max_seconds_per_iteration: {{sla_max_seconds}}
+      failure_rate:
+        max: {{sla_max_failure}}