I have a playbook where I would like to do a task once before starting a 
couple roles and once after roles with serial 1. I thought I could 
accomplish this with pre and post tasks but it looks like they are called 
once per server.

---
- name: Pre Post Task Test
  hosts: "linux"
  gather_facts: false
  any_errors_fatal: true
  serial: 1
  pre_tasks:
  - shell: echo "pre"

  tasks:
  - shell: echo "tasks"

  post_tasks:
  - shell: echo "post"

Results in:
PLAY [Hello World Linux] 
****************************************************************************************************************************

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch01] => {"changed": true, "cmd": "echo \"pre\"", "delta": 
"0:00:00.002576", "end": "2018-02-14 15:27:31.198276", "rc": 0, "start": 
"2018-02-14 15:27:31.195700", "stderr": "", "stderr_lines": [], "stdout": 
"pre", "stdout_lines": ["pre"]}

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch01] => {"changed": true, "cmd": "echo \"tasks\"", 
"delta": "0:00:00.003271", "end": "2018-02-14 15:27:37.240087", "rc": 0, 
"start": "2018-02-14 15:27:37.236816", "stderr": "", "stderr_lines": [], 
"stdout": "tasks", "stdout_lines": ["tasks"]}

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch01] => {"changed": true, "cmd": "echo \"post\"", "delta": 
"0:00:00.002614", "end": "2018-02-14 15:27:43.294444", "rc": 0, "start": 
"2018-02-14 15:27:43.291830", "stderr": "", "stderr_lines": [], "stdout": 
"post", "stdout_lines": ["post"]}

PLAY [Hello World Linux] 
****************************************************************************************************************************

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch02] => {"changed": true, "cmd": "echo \"pre\"", "delta": 
"0:00:00.002461", "end": "2018-02-14 15:27:44.875867", "rc": 0, "start": 
"2018-02-14 15:27:44.873406", "stderr": "", "stderr_lines": [], "stdout": 
"pre", "stdout_lines": ["pre"]}

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch02] => {"changed": true, "cmd": "echo \"tasks\"", 
"delta": "0:00:00.002899", "end": "2018-02-14 15:27:45.271244", "rc": 0, 
"start": "2018-02-14 15:27:45.268345", "stderr": "", "stderr_lines": [], 
"stdout": "tasks", "stdout_lines": ["tasks"]}

TASK [command] 
**************************************************************************************************************************************
changed: [mdl-swch02] => {"changed": true, "cmd": "echo \"post\"", "delta": 
"0:00:00.002650", "end": "2018-02-14 15:27:45.664172", "rc": 0, "start": 
"2018-02-14 15:27:45.661522", "stderr": "", "stderr_lines": [], "stdout": 
"post", "stdout_lines": ["post"]}

PLAY RECAP 
******************************************************************************************************************************************
mdl-swch01                 : ok=3    changed=3    unreachable=0    failed=0
mdl-swch02                 : ok=3    changed=3    unreachable=0    failed=0


I am looking for something that would do:
pre tasks
tasks for mdl-swch01
tasks for mdl-swch02
post tasks

Any ideas on how to accomplish this?


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