The document provides an overview of Terraform, including that it is a declarative provisioning tool that uses HCL or JSON to safely evolve infrastructure in a predictable way. It discusses Terraform's use of graph theory to identify dependencies, its plugin-based architecture to compose multiple cloud services, and its core concepts like providers, resources, data sources, and the workflow of plan, apply, and destroy.

1. Terraform 101
Pradeep Loganathan

2. Resource Lifecycle

4. Terraform trend

5. • Declarative provisioning tool for IaC.
• Uses Hashicorp Configuration Language(HCL) or JSON.
• Helps to evolve infrastructure safely and predictably.
• Uses Graph theory to identify change dependencies.
• Multipurpose Composition tool
• Composes multiple tiers ( IAAS, PAAS, SAAS)
• Plugin based provider architecture.
• Opensource – Hashicorp / Hashicorp Tao
Terraform

6. Chef, Puppet, Ansible et all

7. Terraform Architecture

8. Terraform Workflow

9. Terraform Devops

10. Terraform - Provider
Provider
• The Provider block tells Terraform which API to
talk to with what permissions.
• Multiple providers can be used at any time for
multi-cloud environments.
• Credentials can be provided through
environmental variables.

11. Terraform – Initializing Providers

12. Terraform - Resources
Resources
• The resource block denotes the
resource to be created
• Resources can be anything that
the provider supports. Vnet, vpc,
ad group, azure pipeline etc
• Resources have standard and
specific properties. e.g. name, tag

13. Terraform - Data
Data
• Data sources allows for data to be
fetched or computed
• A data block is used to read data
from a data source and export to a
local identifier
• Each data resource is associated
with a single data source. This
determines the kind of object (or
objects) it reads and what query
constraint arguments are
available.

14. Terraform - Data

15. Terraform - Workflow

16. Terraform - Plan

17. Terraform - Plan

18. Terraform - Apply

19. Terraform - Apply

20. Terraform - Destroy

21. Terraform - Destroy

22. Terraform - Destroy

24. Backup