What is Ansible?
- config mgmt tool
server(s)
- deploy mgmt
- python
- from redhat
release
ansible - cmd - free
tower - web - paid - support
awx - web - free - no supprt
What config?
file
dir
package
services
cmd
APt
Why Ansible?
-------------------------------------------
We want to manage config of 100(s) server parrell...
1 deployment in 1 machine takes 10 mins
1 deployment in 100 machine takes 10 mins
shell - linux
ps - windows
ansible platform inde
python - java
ansible is easy
for read - write - test - debug - extend - share
Others -- chef - puppet - salt - cfengine
===================================================
Ansible arch aka how this works?
Human --> ACS --> ARS (S)
ACS - === ARS
---------------
Ansible NO
Linux ANY
Python LINUX - python
windows - ps3 + dotnet
------------------------Linux -- SSH
------------------------ Win --- winrm
=====================================================
1. ACS - Install Ansible
------------------------
- executable
- modules - A python code --> Running in ARS with param. copy [ src & dest ]
apt [ install & git ]
https://docs.ansible.com/ansible/2.9/modules/list_of_all_modules.html
https://docs.ansible.com/ansible/2.9/modules/modules_by_category.html
- plugins - A python code --> Adding feature in Ansible
- configfile - If you want to overirde harding of executable variables - can specify in configfile
$ sudo apt update
$ sudo apt install software-properties-common
$ sudo add-apt-repository --yes --update ppa:ansible/ansible
$ sudo apt install ansible
https://docs.ansible.com/ansible/latest/installation_guide/installation_distros.html#installing-ansible-on-ubuntu
2. ACS - inventory
LIST OF IP ADD|Hostname of ARS
CMD
file
script
3. ACS - playbook
yaml
play
Play
Hosts: group from inventory
Tasks:
Module and its param
Module and its param
Module and its param
Module and its param
===============================================================
Project - Setup a webserver using ansible...Deploy a webserver in 100s of box
----------------------------------------------------------
Step 1 - Install webserver apache2 in ubuntu
apt {name=apache2 state=latest}
apt install apache2
Step 2 - Copy a packages
copy {src=index.html dest=/var/www/html
Step 3 - Start a web service
service name=apach2 state=started
service of linux
copy a file in 1 machine
-------------------------
cmd == ansible adhoc cmd
script == playbook
1 module in 1 machine ---- adhoc cmd
1 module in 100 machine ---- adhoc cmd wih inventory
100 module in 1 machine ---- playbook
100 module in 100 machine ---- playbook wih inventory
================================================
anible
anible-playbook
==================================================
ansible localhost -m apt -a"name=apache2 state=latest"
ansible localhost -m copy -a"src=index.html dest=/var/www/html"
ansible localhost -m service -a"name=apache2 state=started"
18.212.4.186
44.208.165.223
ansible all -i inventory -m apt -a"name=apache2 state=latest"
ansible all -i inventory -m copy -a"src=index.html dest=/var/www/html"
ansible all -i inventory -m service -a"name=apache2 state=started"
all == group build in
ansible all -i inventory -m apt -a"name=apache2 state=latest" -u ubuntu --key-file=node.pem -b
ansible all -i inventory -m copy -a"src=index.html dest=/var/www/html" -u ubuntu --key-file=node.pem -b
ansible all -i inventory -m service -a"name=apache2 state=started" -u ubuntu --key-file=node.pem -b
[web]
18.212.4.186
44.208.165.223
[db]
10.2.2.2
10.2.2.2
10.2.2.4
ansible web -i inventory -m apt -a"name=apache2 state=latest" -u ubuntu --key-file=node.pem -b
ansible web -i inventory -m copy -a"src=index.html dest=/var/www/html" -u ubuntu --key-file=node.pem -b
ansible web -i inventory -m service -a"name=apache2 state=started" -u ubuntu --key-file=node.pem -b
ansible web -i inventory -m apt -a"name=apache2 state=latest" -u ubuntu -k -b
ansible web -i inventory -m copy -a"src=index.html dest=/var/www/html" -u ubuntu -k -b
ansible web -i inventory -m service -a"name=apache2 state=started" -u ubuntu -k -b