notes/session-28.txt at main · daws-88s/notes · GitHub

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ANSIBLE_CONFIG
pwd
user home directory .ansible.cfg
/etc/ansible/ansible.cfg

handlers
=========
handlers are notifiers, you can call task-b when task-a changes. for example when a configuration changes you can restart the application using handlers.

tags
=====
if you want a specific tag to run inside playbook, tag it and call it

deployment
===========
1. remove old code
2. copy new code
3. install dependencies
4. restart the server

include_role vs import_rule
=======
way of calling other roles.

import_role respects the tags. if you apply tags to import_role those will be automatically applied to all the tasks inside that role...

include_role does not respect tags

* include_role vs import_role
* dynamic inventory
* ansible vault and secrets manager
* ansible forks(how to connect multiple servers at a time)

Terraform

4 servers -> catalogue

5th server -> new catalogue app runs
delete one old server

6th server -> new catalogue app runs
delete 2nd old server

blue-green
======
create another 4 servers -> deployment new catalogue
route traffic to new servers