Ansible vars_prompt for roles - ansible

Question

I have a set of Ansible playbooks and the main yml file is like this
- hosts: all
roles:
- common
- install_nginx
I want to add the confirm message when I trigger the playbook. I tried this and did not work
- hosts: all
vars_prompt:
- name: CONFIRM
prompt: Just to confirm you will install stuff
tasks:
- fail: no deployment this time
when: CONFIRM != 'yes'
roles:
- common
- install_nginx
How can I use vars_prompt in this case without modify every role?

Answer 1

If you look at the output from running your playbook with the vars_prompt you'll see that the fail task runs after the other roles. This is also mentioned in the Ansible docs for playbooks and roles:
If the play still has a ‘tasks’ section, those tasks are executed
after roles are applied.
As the above docs also mention if you want to force a task to run before any roles then you can use pre_tasks.
So to have your confirmation style prompt you could simply do this:
- hosts: all
vars_prompt:
- name: CONFIRM
prompt: Just to confirm you will install stuff
pre_tasks:
- fail: no deployment this time
when: CONFIRM != 'yes'
roles:
- common
- install_nginx

Answer 2

I am not very sure, but the way this works is :
- hosts: all
vars_prompt:
- name: "confirm"
prompt: Just to confirm you will install stuff
private: no
default: "no"
tasks:
- name: Install Nginx
apt: name=nginx
sudo: true
when: confirm == "yes"
Now if we need to call each role based on a condition , i suppose we shoud be using tags.

Answer 3

How to use Ansible vars_prompt for roles
i got the solution to use vars_prompts in ansible role section
i have directly included vars_prompt in my main.yml playbook as like before
- hosts: "{{HOSTS}}"
gather_facts: yes
become: yes
roles:
- syslog
- splunk
- nmon
- trendmicro
- user-creation
- extened-history
vars_prompt:
- name: "user_password"
prompt: "Enter User Password"
private: yes
confirm: yes
==========================================================
Below is the ansible command to execute the playbook
# ansible-playbook ort-linux.yml -e "HOSTS=TESTSERVER"
Enter User Password:
confirm Enter User Password:
========================================================
Below is my roles playbook for user id creation
---
- name: "Task-1 create Linux Team user"
user:
name: "{{item}}"
comment: LINUX_UNIX_TEAM
group: LINUX_UNIX_TEAM
shell: /bin/bash
generate_ssh_key: yes
ssh_key_bits: 2048
ssh_key_file: .ssh/id_rsa
createhome: yes
password: "{{user_password|password_hash('sha512')}}"
loop:
- sam
- jack
- kumar
- ravi
tags: linuxuser