Address Mark's comment

Author: Bharat Kunwar

.travis.yml

@@ -13,7 +13,7 @@ addons:
 
 install:
   # Install ansible
-  - pip install ansible
+  - pip install ansible jmespath
 
   # Check ansible version
   - ansible --version

README.md

@@ -12,6 +12,10 @@ The OpenStack APIs should be accessible from the target host.  OpenStack
 Newton or later is required.  Client credentials should have been set
 in the environment, or using the `clouds.yaml` format.
 
+In terms of Python `pip` packages, the requirements are:
+- ansible
+- jmespath (required by `json_query` filte)
+
 Role Variables
 --------------
 

tasks/main.yml

@@ -26,7 +26,7 @@
     - name: Extract node groups
       set_fact:
         cluster_group: "{{ cluster_stack.stack.outputs | selectattr('output_key', 'equalto', 'cluster_group') | first }}"
-  when: cluster_state != 'query'
+  when: cluster_state in ['present', 'absent']
 
 # Case 2: we are performing a read-only query of the cluster configuration.
 # Read the stack's outputs via the API.
@@ -129,4 +129,4 @@
         - "{{ cluster_nodes }}"
       delegate_to: "{{ cluster_gw_ip | default('localhost') }}"
 
-  when: cluster_state != 'absent'
+  when: cluster_state in ['present', 'query']