session-19.txt

Ansible Roles
----------------
DRY principal --> reuse the code
	variables
	functions
	
What is Ansible Role?

Role is a proper structure of variables, tasks, templates, handlers, etc. Using Roles we can re use the code...

tasks/ --> We will mention all tasks here
handlers/ --> We will mention all notifiers here
templates/  --> We will  mention all templates here, with variables
files/ --> We will mention all files here, without variables
vars/ --> variables related to roles are here
defaults --> low priority variables are here
meta/  --> dependencies are mentioned here

ansible-playbook -i inventory -e ansible_user=ec2-user -e ansible_password=DevOps321 db.yaml

ansible-config =  /etc/ansible/ansible.cfg

1. ANSIBLE_CONFIG

~/ --> denotes home directory

.j2 --> jinja2 template language

what are handlers in ansible?

handlers are notifiers in ansible, usually when there is a change in config we can notify some task to restart server

11 components --> 3nodejs, 1 java, 1 php, 1 go

deployment
-----------
1. create directory
2. remove old code
3. download new code

delete existing directory
create new directory
download code
extract code

ansible vault
---------------
ansible-vault create <file-name>.yaml

Ansible tags
Ansible Dynamic inventory
How Ansible can connect to 10 servers at a time?