commit 1dba8cf97f84e8b57000b30f24e0d485d2b0f2fb
Author: Andrew Bonney <andrew.bonney@bbc.co.uk>
Date:   Fri Oct 2 08:27:05 2020 +0100

    Fix python interpreter bug for designate source installs on train
    
    When performing post install tasks, the openstacksdk is
    imported using a python2 interpreter in a Ubuntu Bionic utility
    container (as a result of a fallback to
    ansible_python['executable']). This fails as the utility container
    has been set up using python3.
    
    This patch corrects the python interpreter to match the variable
    already used in service_setup.yml. This is a partial backport of
    https://review.opendev.org/#/c/745696/
    
    Depends-On: https://review.opendev.org/756057
    Change-Id: I3a4a1823a9c9a05164e8a1654a5c39d6c935bbb9

diff --git a/tasks/designate_post_install.yml b/tasks/designate_post_install.yml
index cff0544..92fd760 100644
--- a/tasks/designate_post_install.yml
+++ b/tasks/designate_post_install.yml
@@ -16,8 +16,7 @@
 - name: Get project id for managed resources
   delegate_to: "{{ designate_service_setup_host }}"
   vars:
-    ansible_python_interpreter: >-
-      {{ (designate_service_setup_host == 'localhost') | ternary(ansible_playbook_python, ansible_python['executable']) }}
+    ansible_python_interpreter: "{{ designate_service_setup_host_python_interpreter }}"
   os_project_facts:
     cloud: default
     name: "{{ designate_managed_resource_project_name }}"