1. Variables in the playbook itself.
2. Variable Files
3. Group Variables
4. Host Variables
5. Inventory Variables
6. Extra Variables
7. Prompted Variables
8. Facts and Registered Variables

ansible_host: The actual IP address or DNS name to connect.
ansible_user: SSH username to connect as
ansible_port: SSH port (default as 22)
ansible_password: SSH password
ansible_connection: Connection type (ssh, local, winrm, etc)
ansible_become: sudo
ansible_become_user: User to become (e.g.,root)
ansible_shell_type: Shell to use (e.g. ssh, csh, powershell)

2. List all the block sections of an Ansible play.
hosts, vars, tasks, handlers

3. What are Ansible inventory parameters? Explain their behavior with an example.
ansible_port, ansible_user, ansible_ssh_private_key_file

4. What are the different ways to introduce variables in an Ansible playbook?
variable in playbook, variable file, task vars

5. What are templates in Ansible?
Templates is a module in ansible which is used access the variable in files  

6. What are handlers in Ansible?
Handlers are block in playbook which list all the handler tasks. this task is called by normal task when change is true. 

2. List all the block sections of an Ansible play.
Task Block, Error Block, Handler Block

3. What are Ansible inventory parameters? Explain their behavior with an example.
inventory Behavioral parameters
4. What are the different ways to introduce variables in an Ansible playbook?
Task level, file level,

5. What are templates in Ansible?
Jinga Template

6. What are handlers in Ansible?
In Ansible, handlers are special tasks that runs only when it “notified” by other tasks within a playbook

2)name, vars,task,handlers,import_tasks

3) ansible_port: ssh port
ansible_user: ssh username to connect as
ansible_ssh_key_private_file:vPath to private ssh key for authentication

4)vars_file
vars_prompt
Playbook vars block
host vars /group vars

5)Templates r files usualyy .j2 file that contain dynamic content

6) Handlers are same as tasks but triggered by notify

• name: A description of the play.
• hosts: The target hosts or groups for the play.
• become: Whether to escalate privileges (e.g., sudo).
• vars: Variables defined for the play.
• vars_files: External variable files to include.
• vars_prompt: Prompts for variables at runtime.
• tasks: The list of tasks to execute.
• handlers: Special tasks triggered by notify statements.
• pre_tasks: Tasks that run before the main tasks.
• post_tasks: Tasks that run after the main tasks.
• roles: Roles to include in the play.
• environment: Environment variables for tasks.
• tags: Tags to control which tasks run.

3. What are Ansible inventory parameters? Explain their behavior with an example.
it allows us to provide host and login information specific to each host in the inventory file.
[web]
13.201.50.27 ansible_user=ubuntu ansible_ssh_private_key_file=node.pem ansible_become=yes
this helps web group to specify the user name and privake key info specifically.

4. What are the different ways to introduce variables in an Ansible playbook?

1. Extra vars (command line -e)
2. Task vars (set by include, import, or block)
3. Role and include vars (defined in playbook)
4. Block vars (only for tasks in block)
5. Play vars (defined in play)
6. Host facts (gathered or set_fact)
7. Playbook host_vars and group_vars
8. Inventory host_vars and group_vars
9. Inventory file or script group vars
10. Inventory file or script host vars
11. Role defaults

5. What are templates in Ansible?
templates are used to work on the file edits at the remote hosts. Jinja template is used in the Ansible as python is the base for it. For example, we shall update the config file in the runtime and replace at the remote host.
6. What are handlers in Ansible?
It is an action executed when a task comes true. It will be executed at the end of the play. If a task execution succeed, we may need to restart the system. This can be handled through handlers.

 tasks:
 – name: Install apache httpd (state=present is optional)
  ansible.builtin.apt:
   name: apache2
   state: present

2. List all the block sections of an Ansible play.
Block / rescue / always
3. What are Ansible inventory parameters? Explain their behavior with an example.
Inventory parameters are the vars defined in the inventory file which help to customise the ansible behaviour for a specific host of group of hosts.e.g:
[web:vars]
ansible_user=ubuntu
ansible_ssh_private_key_file=node.pem
ansible_become=yes

4. What are the different ways to introduce variables in an Ansible playbook?

1. playbook vars 2. inventory vars 3. task vars 4 tower vars

5. What are templates in Ansible?
Template helps in interpolating variables in the files outside the playbook
6. What are handlers in Ansible?
Handlers are the special task which are executed only when condition is true like change = true. we can call another task on this condition.

 tasks:
 – name: Ensure apache is at the latest version
  ansible.builtin.yum:
   name: httpd
   state: latest

 – name: Write the apache config file
  ansible.builtin.template:
   src: /opt/httpd.j2
   dest: /etc/httpd.conf 

2. List all the block sections of an Ansible play.
vars
tasks
handlers

3. What are Ansible inventory parameters? Explain their behavior with an example.
dictionary
list
key: value

4. What are the different ways to introduce variables in an Ansible playbook?
vars
host_vars
group_vars
vars-file
prompt
register (dynamic variables)
–extra-vars within playbook command

5. What are templates in Ansible?
Templates in Ansible (jinja2) help interpretation of variables.

6. What are handlers in Ansible?
Handlers in Ansible are also a type of task that run a specific task only when Changed condition is met.

2. List all the block sections of an Ansible play.
hosts, tasks, handlers, vars, block, when, rescue, always,

3. What are Ansible inventory parameters? Explain their behavior with an example.
[inventory:vars] – to define variable at inventory level,
[inventory:children] – to define group of hosts in inventory

4. What are the different ways to introduce variables in an Ansible playbook?
basically we have 5 major ways to defined variables in ansible playbook but we have 38 ways to initialize variable to playbook.
1.) at hard coded playbook level
2.) tasks level
3.) through vars files
4.) through prompts
5.) via register variable
6.) dynamic ways

5. What are templates in Ansible?
templates are a way to reflect string interpolation at run time which is supported bu Jinja template in ansible.

6. What are handlers in Ansible?
Handlers is a way to execute any task which meet with desired conditions. such if I want to restart Apache service in case of dynamic file change which is register via notify section in handlers list.

a) Install Software
b) Configure services
c) Deploy applications
d) Manage files and users

A playbook has a list of plays. Each play targets hosts. Each play has tasks.
Example: Install Aoache on Ubuntu

—
-name: Install and start Apache web server
hosts: webservers
become: true # Run tasks as root (sudo)

tasks:
-name: Update apt cache
apt:
Update_cache: yes

-name: Install Apache2 package
apt:
name: apache2
state: present

-name: Ensure Apache is running
service:
name: apache2
state: started
enabled: true

An Ansible playbook is a YAML file that defines a set of tasks to be executed on remote systems. It is used to automate configuration management, application deployment, and other IT tasks. Playbooks are written in a human-readable format and allow you to define the desired state of your systems.

### Example of an Ansible Playbook
Here is a simple playbook that installs a package and starts a service:

—
– name: Install and start Apache
 hosts: webservers
 become: yes
 vars:
  packagename: apache2
 tasks:
  – name: Install Apache
   apt:
    name: “{{ packagename }}”
    state: present

  – name: Start Apache service
   service:
    name: “{{ packagename }}”
    state: started
…

==============================================================
2. List all the block sections of an Ansible play.

name: A description of the play.
hosts: Specifies the target hosts or groups to run the play on.
become: Indicates whether privilege escalation (e.g., sudo) is required.
vars: Defines variables for the play.
vars_files: Includes external variable files.
tasks: Contains a list of tasks to execute on the target hosts.
handlers: Defines tasks that are triggered by notify statements in other tasks.
roles: Specifies roles to include in the play.
environment: Sets environment variables for tasks.
pre_tasks: Tasks to run before the main tasks section.
post_tasks: Tasks to run after the main tasks section.
tags: Allows tagging of tasks for selective execution.
==============================================================

3. What are Ansible inventory parameters? Explain their behavior with an example.

Ansible inventory parameters are used to define the hosts and groups of hosts on which Ansible will execute tasks. These parameters can include hostnames, IP addresses, variables, and connection details. Inventories can be written in INI or YAML format.

Common Inventory Parameters
ansible_host: Specifies the IP address or hostname of the target.
ansible_user: Defines the SSH user to connect as.
ansible_port: Specifies the SSH port (default is 22).
ansible_password: Sets the password for SSH authentication.
ansible_ssh_private_key_file: Path to the private key file for SSH.
ansible_connection: Defines the connection type (e.g., ssh, local, winrm).
Custom Variables: You can define custom variables for hosts or groups.

all:
 hosts:
  web1:
   ansible_host: 192.168.1.10
   ansible_user: ubuntu
  web2:
   ansible_host: 192.168.1.11
   ansible_user: ubuntu
 children:
  databases:
   hosts:
    db1:
     ansible_host: 192.168.1.20
     ansible_user: root
     ansible_password: secret
==============================================================

4. What are the different ways to introduce variables in an Ansible playbook?

– name: Example Playbook
 hosts: all
 vars:
  app_name: my_app
  app_port: 8080
 tasks:
  – name: Print app details
   debug:
    msg: “App {{ app_name }} is running on port {{ app_port }}”

– name: Example Playbook
 hosts: all
 vars_files:
  – vars.yml
 tasks:
  – name: Print variables
   debug:
    msg: “App {{ app_name }} is running on port {{ app_port }}”

==============================================================

5. What are templates in Ansible?

Dynamic Content: Templates can include variables, loops, and conditionals to generate content dynamically.
Jinja2 Syntax: Templates use Jinja2 syntax for embedding logic.
File Extension: Templates typically have a .j2 extension.

==============================================================
6. What are handlers in Ansible?

Triggered by notify: Handlers are executed only when a task with a notify directive reports a change.
Run Once: Even if multiple tasks notify the same handler, it will only run once at the end of the play.
Defined in handlers Section: Handlers are defined in a dedicated handlers section of a playbook

==============================================================

2. List all the block sections of an Ansible play.
name
hosts
vars
tasks
handlers
roles

3. What are Ansible inventory parameters? Explain their behavior with an example.
They define hosts and groups Ansible manages. Parameters can set SSH port, user, etc
[web]
192.168.1.10 ansible_user=ubuntu ansible_port=22

4. What are the different ways to introduce variables in an Ansible playbook?
Inline in playbook (vars)
Inventory files
External variable files (vars_files)
Extra vars (–extra-vars)

5. What are templates in Ansible?
Templates are files (usually .j2) that use Jinja2 to insert variables into config files

6. What are handlers in Ansible? 
Handlers are special tasks run only when notified by other tasks, usually for actions like restarting services.
– name: Restart Apache
 service:
  name: httpd
  state: restarted
 when: changed

2. List all the block sections of an Ansible play.
host, tasks, include/import, handlers, roles, templates

3. What are Ansible inventory parameters? Explain their behavior with an example.
host vars and group vars, host vars are specific to host and group vars for group of hosts
Eg :
[web]
13.201.50.27 ansible_user=root

[web:vars]
ansible_user=ubuntu
ansible_ssh_private_key_file=node.pem
ansible_become=yes

4. What are the different ways to introduce variables in an Ansible playbook?
static vars, variable files – include vars, import vars, command line arguments, dynamic inputs, registry variables

5. What are templates in Ansible?
templates to perform run time operation in jinja2 files

6. What are handlers in Ansible?
to handle specific task, like conditional statement, if port is changes restart the service else no action