Ansible Playbook

Playbooks are created in YAML format using modules available in ansible

To list the available modules

$ansible-doc -l 

To know more about a specific module used ansible-doc modulename

$ansible-doc <modulename>

Below playbook use apt module to install Nginx and TFTP packages on ubuntu machines 

$ cat  install.yml

---

 - name: Install Packages

   gather_facts: false

   become: yes

   hosts: NODE

   tasks:

     - name: Install packages

       apt: pkg={{ item }} state=present update_cache=true

       with_items:

            - nginx

            - tftp

$ cat list.ini

[NODE]

localhost

server1

server2

$ansible-playbook -i list.ini install.yml --syntax-check (Verify syntax )

playbook: install.yml

Ansible playbook created runs on all the host under NODE group in list.ini file

$ansible-playbook -i list.ini install.yml  -bK 

-K to let the ansible request for the password for SUDO

-b Used to become the default root