pcd_service.yml

---
##
# prepare|configure|deploy a service
#
#  1. specify the service to apply by passing the PCD_ROLE variable
#
#  2. -optionally- limit the hosts via --limit, and tasks via --tags 
#
#  e.g. ansible-playbook -i inventory/my.hosts pcd_service.yml \
#          --limit=dbservers --tags=configure -e PCD_ROLE=mysql
#    
#  + `prepare` tasks typically handle ONE-TIME prerequisites such as
#    dependency installations, user account creations, database setup, &c. 
#    
#  + `configure` tasks typically execute more often, whenever
#    configuration changes are made. E.g. to update a cron schedule
#
#  + If no tags are passed, all tasks will be executed.   
#

- name: "pcd application"
  hosts: all
  remote_user: root
  
  pre_tasks:
    fail: msg="Please specify the role to execute by passing the PCD_ROLE variable"
    when: PCD_ROLE is not defined
  
  roles:
    - {role: pcd-common, tags: ['prepare','configure','deploy']}
    - {role: pcd-services/{{ PCD_ROLE }}, when: PCD_ROLE is defined }