Delete any previous configuration

Delete any previous configuration using the virsh module in ansible:
Networks, VMs and local IPs.

JIRA: YARDSTICK-950

Change-Id: Ie4963ab8210ce50ba2e9fa22642ec27a3b2031e1
Signed-off-by: John O Loughlin <john.oloughlin@intel.com>

3 files changed, 96 insertions, 0 deletions

diff --git a/ansible/infra_deploy.yml b/ansible/infra_deploy.yml
index 10f53fbad..948dd338a 100644
--- a/ansible/infra_deploy.yml
+++ b/ansible/infra_deploy.yml
@@ -16,3 +16,4 @@
 
   roles:
     - infra_check_requirements
+    - infra_destroy_previous_configuration
diff --git a/ansible/roles/infra_destroy_previous_configuration/tasks/delete_network.yml b/ansible/roles/infra_destroy_previous_configuration/tasks/delete_network.yml
new file mode 100644
index 000000000..314ee30af
--- /dev/null
+++ b/ansible/roles/infra_destroy_previous_configuration/tasks/delete_network.yml
@@ -0,0 +1,48 @@
+# Copyright (c) 2017-2018 Intel Corporation.
+#
+# 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.
+---
+- name: Destroy old networks created by virt
+  virt_net:
+    name: "{{ network_item.name }}"
+    command: destroy
+  when: network_item.name in virt_nets.list_nets
+
+# Ignoring erros as network can be created without being defined.
+# This can happen if a user manually creates a network using the virsh command.
+# If the network is not defined the undefine code will throw an error.
+- name: Undefine old networks defined by virt
+  virt_net:
+    name: "{{ network_item.name }}"
+    command: undefine
+  when: network_item.name in virt_nets.list_nets
+  ignore_errors: yes
+
+- name: Check if "ovs-vsctl" command is present
+  command: which ovs-vsctl
+  register: ovs_vsctl_present
+  ignore_errors: yes
+
+- name: Destroy OVS bridge if it exists
+  command: ovs-vsctl --if-exists -- del-br "{{ network_item.name }}"
+  when: ovs_vsctl_present.rc == 0
+
+- name: Check if linux bridge is present
+  stat: path="{{ '/sys/class/net/'+network_item.name+'/brif/' }}"
+  register: check_linux_bridge
+
+- name: Remove linux bridge if it exists
+  shell: |
+    ifconfig "{{ network_item.name }}" down
+    brctl delbr "{{ network_item.name }}"
+  when: check_linux_bridge.stat.exists
diff --git a/ansible/roles/infra_destroy_previous_configuration/tasks/main.yml b/ansible/roles/infra_destroy_previous_configuration/tasks/main.yml
new file mode 100644
index 000000000..5595cd501
--- /dev/null
+++ b/ansible/roles/infra_destroy_previous_configuration/tasks/main.yml
@@ -0,0 +1,47 @@
+# Copyright (c) 2017-2018 Intel Corporation.
+#
+# 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.
+---
+- name: Include
+  include_vars:
+    file: "{{ rs_file }}"
+    name: infra_deploy_vars
+
+- name: List virt-nets
+  virt_net: command=list_nets
+  register: virt_nets
+
+- name: List VMs
+  virt: command=list_vms
+  register: virt_vms
+
+- name: Destroy old VMs
+  virt:
+    command: destroy
+    name: "{{ item.hostname }}"
+  when: item.hostname in virt_vms.list_vms
+  with_items: "{{ infra_deploy_vars.nodes }}"
+
+- name: Undefine old VMs
+  virt:
+    command: undefine
+    name: "{{ item.hostname }}"
+  when: item.hostname in virt_vms.list_vms
+  with_items: "{{ infra_deploy_vars.nodes }}"
+
+- name: Delete old networks
+  include_tasks: delete_network.yml
+  extra_vars: "{{ virt_nets }}"
+  loop_control:
+    loop_var: network_item
+  with_items: "{{ infra_deploy_vars.networks }}"