Ansible playbook example

Ansible Playbook |In this article we learn Ansible Playbook Example and create ansible playbook hosts .In previous article we have seen how to execute an ansible task using Ad-hoc command.We also knew that Ad-Hoc command is very useful to execute simple task like reboot the server, changing permission of files and so on.But when we want to execute multitask at a time.Then ansible playbook takes a vital role to execute multitask at a time to configure and deployement on the remote machine.

Ansible playbook is written by YAML language which is very simple language other than XML and JSON format.It is easy to understand for human being.

Creation of ansible playbook

Before creating ansible playbook we need to update the inventory file first which is vey necessary to gathering the details of the remote machine on which ansible tasks will be executed.If you want to change default inventory location ,you can specify the location of the inventory file using ‘-i’ switch.

After that we need to create ansible playbook hosts .In this tutorial you have used one host named host01.put its hostname in an inventory file call our inventory myhosts.

echo “host01 ansible_ssh_user=root” >> myhosts

How to run ansible playbook

To demonstrate ansible playbook example first we have create one file called yum.yaml in which ansible tasks will be written using YAML language.

To create blank file using the below command

touch yum.yaml

Now we write code to execute the task.This is single task code.

---

- hosts: host01

tasks:

- name: ensure latest sysstat is installed

yum:

name: sysstat

state: latest

To run the playbook use ansible-playbook command

Ansible-playbook –i myhosts yum.yaml

Ansible Playbook Example

Ansible should return “changed=1”indicating that the change has been occurred

· ‘---‘ : start of the YAML file

· hosts: To un the tasks on which hosts.

· Name: The task name.

· Yum: Specify the module name

· Name: argument of the specified module.

If want to uninstall the package use state=absent.

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