Test container creation based on IP address

This test executes an LXC container listing from the LXC host, then
verifies that the container is present by name and IP address.

The test will work whether there is one or more IP addresses in
each containers created.

This patch also includes the following in order to unblock testing
for this role:
 - A forced apt-get update
 - A base other-requirements.txt file to ensure that the
   OpenStack-CI fallback requirements aren't used, which conflict
   with LXC and cause the instance to hang.

Change-Id: I2619b1090300a161c108fcc3f65059e8d50c851e

other-requirements.txt

@@ -0,0 +1,16 @@
+# This file facilitates OpenStack-CI package installation
+# before the execution of any tests.
+#
+# See the following for details:
+#  - http://docs.openstack.org/infra/bindep/
+#  - https://github.com/openstack-infra/bindep
+#
+# Even if the role does not make use of this facility, it
+# is better to have this file empty, otherwise OpenStack-CI
+# will fall back to installing its default packages which
+# will potentially be detrimental to the tests executed.
+
+# OpenStack-CI's Jenkins needs curl
+# TODO(odyssey4me) remove this once https://review.openstack.org/288634 has merged
+# and the disk images are rebuilt and redeployed.
+curl

tests/test.yml

@@ -17,6 +17,9 @@
   hosts: localhost
   connection: local
   pre_tasks:
+    - name: First ensure apt cache is always refreshed
+      apt:
+        update_cache: yes
     - name: Ensure root ssh key
       user:
         name: "{{ ansible_env.USER | default('root') }}"
@@ -84,17 +87,20 @@
       lxc_container_backing_store: dir
       global_environment_variables:
         PATH: "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
-  post_tasks:
-    - name: Confirm containers were created
-      command: lxc-ls -f
-      register: lxc_containers
-    - name: Format output
-      set_fact:
-        _lxc_output: "{{ lxc_containers.stdout.split() | lower }}"
-    - set_fact:
-        lxc_output: "{{ _lxc_output | join(' ') }}"
-    - name: Check role functions
+
+- name: Test whether the role produced expected results
+  hosts: localhost
+  tasks:
+    - name: List the running LXC containers present on the host
+      command: lxc-ls -1 --fancy --fancy-format name,ipv4 --running
+      register: lxc_container_list
+    - name: Verify that the expected containers are present with the correct addresses
+      # Example stdout:
+      # NAME        IPV4
+      # ---------------------------------------
+      # container1  172.16.12.3, 10.100.100.101
+      # container2  10.100.100.102, 172.16.12.4
       assert:
         that:
-          - "'container1 running 10.100.100.101' in lxc_output"
-          - "'container2 running 10.100.100.102' in lxc_output"
+          - lxc_container_list.stdout | search("container1\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3},\s+)*10.100.100.101(,\s+\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})*\s+")
+          - lxc_container_list.stdout | search("container2\s+(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3},\s+)*10.100.100.102(,\s+\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})*\s+")