Ansible Playbooks

https://docs.ansible.com/ansible/latest/user_guide/playbooks_intro.html

https://docs.ansible.com/ansible/latest/cli/ansible-playbook.html

https://docs.ansible.com/ansible/latest/user_guide/intro_patterns.html

ansible-playbook -i 127.0.0.1
ansible-playbook site.yml --limit datacenter2 -f 10

Using if or lookup from env in jinja vars

---
- name: -Test-
  hosts: local
  vars:
    my_group_var: False
#    my_group_var: True

  tasks:

  - name: Prepare vars file from template.
    template: src=/tmp/vars.yaml.j2
              dest=/tmp/vars.yaml

  - name: Include vars
    include_vars: "/tmp/vars.yaml"

The content of example jinja template /tmp/vars.yaml.j2 is:

{% if my_group_var %}                                                                                                                                                                                             
test:                                                                                                                                                                                                             
   var1: value                                                                                                                                                                                                    
   var2: value                                                                                                                                                                                                    
{% else %}                                                                                                                                                                                                        
test:                                                                                                                                                                                                             
   var1: other_value                                                                                                                                                                                              
   var2: other_value                                                                                                                                                                                              
{% endif %}