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What is Terraform? Why TF? Terraform workflow.

Introduction:

Terraform is an open-source infrastructure as code (IaC) software tool created by Hashi Corp. It allows users to define and provision data centre infrastructure using a high-level configuration language known as Hashi Corp Configuration Language (HCL), or optionally JSON. Terraform Training

Why Terraform?

  1. Infrastructure as Code (IaC): Terraform enables the management of infrastructure using code, which allows for version control, collaboration, and automation. This approach is more reliable and consistent compared to manual configuration.
  2. Multi-Cloud Compatibility: Terraform supports multiple cloud service providers, including AWS, Azure, Google Cloud Platform, and more. This flexibility enables users to manage hybrid and multi-cloud environments from a single configuration.

Immutable Infrastructure: By promoting the concept of immutable infrastructure, Terraform ensures that infrastructure changes are applied in a controlled and predictable manner. This reduces the chances of configuration drift and makes it easier to reproduce environments. Terraform Training Online

  1. State Management: Terraform maintains the state of the infrastructure in a state file, which keeps track of resource dependencies and configurations. This state management allows Terraform to detect changes and apply updates accurately.
  2. Modular and Reusable Code: Terraform allows the use of modules, which are reusable components that can be shared and managed independently. This modularity simplifies complex configurations and promotes best practices.

Terraform Workflow

  1. Write Configuration: Users define infrastructure resources in configuration files using HCL. These configurations describe the desired state of the infrastructure, specifying resources like virtual machines, networking components, and storage.
  2. Initialize: Run to initialize the working directory. This command downloads the necessary provider plugins and sets up the backend for state storage.
  3. Plan: Use terraform plan to create an execution plan. Terraform compares the current state of the infrastructure with the desired state defined in the configuration files and generates a plan showing what changes will be made.
  4. Apply: Execute terraform apply to apply the changes required to reach the desired state of the configuration. Terraform makes the necessary API calls to the respective cloud service providers to create, update, or delete resources.
  5. Manage State: Terraform continuously manages the state file to track the infrastructure's state. Users can use terraform refresh to update the state file with the actual state of resources or terraform destroy to remove all managed infrastructure.
  6. Collaborate and Version Control: Store configuration files in version control systems like Git. This practice enables collaboration among team members, version tracking, and rollback capabilities. Terraform Training in Hyderabad

By following this workflow, Terraform provides a systematic and reliable approach to infrastructure management, making it a popular choice for DevOps teams and cloud engineers.

 

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