Cleanup Rancher containers after Molecule converge

Rancher role test do remove rancher/agent and rancher/server
containers at 'cleanup' stage but Rancher Agent spawned
containers are left orphaned. This patch adds tasks to
remove them.

This patch also adds custom ansible module for listing
docker containers (as of ansible 2.7.10 no upstream module
provides that feature, even new docker_container_info info
module in ansible's devel branch doesn't have it)

Change-Id: I6325dc81063b55b70136280273f8f6138c7a0375
Issue-ID: OOM-1811
Signed-off-by: Bartek Grzybowski <b.grzybowski@partner.samsung.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/ansible/test/roles/cleanup-rancher/tasks/main.yml b/ansible/test/roles/cleanup-rancher/tasks/main.yml
new file mode 100644
index 00000000..21b02988
--- /dev/null
+++ b/ansible/test/roles/cleanup-rancher/tasks/main.yml
@@ -0,0 +1,18 @@
+---
+# Remove containers spawned by Rancher Agent
+- name: Get list of containers spawned by Rancher Agent
+  docker_list_containers:
+    label_name: "{{ item.label }}"
+    label_value: "{{ item.value }}"
+  loop: "{{ container_list_by_label }}"
+  register: docker_list_containers_var
+
+- name: set fact # save a list of containers found by previous task to orphaned_containers var
+  set_fact: orphaned_containers="{{ orphaned_containers|default([]) + item.containers }}"
+  loop: "{{ docker_list_containers_var.results }}"
+
+- name: Remove orphaned containers
+  docker_container:
+    name: "{{ item }}"
+    state: absent
+  loop: "{{ orphaned_containers }}"