Fix cleanup-containers script

kolla-ansible destroy properly fails if qemu processes
are running in compute nodes.
Manually executing ./cleanup-container won't because
$COMPUTE variable is not defined anywhere.

Change-Id: I304c59ec682a93035e631490bbba7b355b1fcae2
Closes-Bug: #1656864

ansible/roles/destroy/tasks/cleanup_containers.yml

@@ -1,10 +1,3 @@
 ---
-- name: Destroying all Kolla containers and volumes on compute node
-  environment:
-    COMPUTE: true
+- name: Destroying all Kolla containers and volumes
   command: /tmp/kolla-cleanup/tools/cleanup-containers
-  when: inventory_hostname in groups['compute']
-
-- name: Destroying all Kolla containers and volumes on non compute node
-  command: /tmp/kolla-cleanup/tools/cleanup-containers
-  when: inventory_hostname not in groups['compute']

tools/cleanup-containers

@@ -1,6 +1,9 @@
 #!/bin/bash
+
+containers_running=$(docker ps --filter "label=kolla_version" --format "{{.Names}}")
+
 QEMU_PIDS=$(pgrep -l qemu | awk '!/qemu-ga/ {print $1}')
-if [[ $COMPUTE ]] && [[ $QEMU_PIDS ]] && [[ $(ps --no-headers wwwup $QEMU_PIDS | grep --invert-match '\-xen\-domid 0') ]]; then
+if [[ "${containers_running}" =~ "nova_libvirt" ]] && [[ $QEMU_PIDS ]] && [[ $(ps --no-headers wwwup $QEMU_PIDS | grep --invert-match '\-xen\-domid 0') ]]; then
     echo "Some qemu processes were detected."
     echo "Docker will not be able to stop the nova_libvirt container with those running."
     echo "Please clean them up before rerunning this script."
@@ -18,8 +21,6 @@ else
         egrep -v '(^\s*$)' | sort | uniq)
 fi
 
-containers_running=$(docker ps --filter "label=kolla_version" --format "{{.Names}}")
-
 if [[ "${containers_to_kill}" =~ "openvswitch_vswitchd" ]] && [[ "${containers_running}" =~ "neutron_openvswitch_agent" ]]; then
 echo "Removing ovs bridge..."
 (docker exec -u root neutron_openvswitch_agent neutron-ovs-cleanup \