Data
Centres a.k.a DC:- is a location where the company has a collection of
computers and servers.
FOR Virtual Machines:
The master server will have scripts to manage IaC on the host machines/agents (like dev server, prod server, UAT server,etc.)(VMs)
The
configuration management tool has two methods/topology:
1.
Pull based:- If host machines/agents machines send a request to execute script
to master and then master creates an execution file and send it to agent
machines for execution. The master will use pull based infrastructure tools
such as: Puppet, Chef.
2.
Push based:- Master decides on which agent machine the script is to be executed.
The master will use push based infrastructure tools such as: Ansible,
Terraform, Saltstack.
Manifest file:- system configuration
Benefits
of IaC:
Main
benefit: you are writing a script on a master server. For e.g a boss came to
you and say can you install java in 1000 machines? If no IaC, you install it
manually, you may forget to install on some machines. But with IaC, can install
via a master server using infrastructure as a Code. When we change in master
machine, all agents machine will change also.
In
summary:
1.
Automation with IaC
2.
Managing agent machines’ infrastructure with the help of Master server’s configuration
manifest file.
3.
Change in the infrastructure is a matter of updating master’s manifest file.
4. Chances
of errors/mistakes are low.
FOR cloud (AWS):
The infrastructure
tools are Terraform (mainly), Ansible.
