What is the use of Terraform in DevOps?

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What is Terraform in DevOps and Its history & origin?

Hi friend, today in this blog I’ll explain about Terraform in DevOps and Its history & origin as well, lets know about Terraform, It is an open-source tool and it is a multi-cloud, infrastructure-as-code solution, developed by Hashicorp, that makes use of the declarative Hashicorp Configuration Language. It helps you manage existing, popular service providers like GCP, AWS, as well as custom in-house solutions. It manages external resources (such as public cloud infrastructure, private cloud infrastructure, network appliances, software as a service, and platform as a service) with “providers”.

These are the some important points about Terraform

  • Original author(s) – Mitchell Hashimoto et al.
  • Developer(s) – HashiCorp
  • Initial release 28 July 2014
  • It also supports a Terraform Module Registry, launched in 2017.
  • In 2019, Terraform introduced the paid version called Terraform Enterprise for larger organizations.

How does Terraform work?

The core Terraform workflow consists of three stages:

Importance of Terraform:-

  • The Terraform state file keeps track of all changes in an environment.
  • It offers a great way to package and reuse common code in the form of modules.
  • Its modules are comparable to functions or methods in scripting or programming languages.
  • State files can also serve as a data source that can be imported by other Terraform projects.

These version controls supported by Terraform

The supported version controls are:

  • Azure DevOps Services
  • Azure DevOps Server
  • Bitbucket Server
  • Bitbucket Cloud
  • Gitlab EE and CE
  • Gitlab.com
  • GitHub Enterprise
  • GitHub.com (OAuth)
  • GitHub.com

These are the features of Terraform:-

  • Terraform can manage parallel environments.
  • It manages external services providers very easily.
  • It can manage multiple clouds to increase fault tolerance.
  • It follows a Declarative approach for faster developments.
  • It helps to display the resulting model in a graphical and easy-to-understand form.
  • Its modular code plays a major role in achieving consistency, reusability, and collaboration.

What are the most useful Terraform commands?

These are some of the most useful Terraform commands are:

terraform init – initializes the current directory
terraform refresh – refreshes the state file
terraform output – views Terraform outputs
terraform apply – applies the Terraform code and builds stuff
terraform destroy – destroys what has been built by Terraform
terraform graph – creates a DOT-formatted graph
terraform plan – a dry run to see what Terraform will do

Explain the uses of Terraform CLI and list some basic CLI commands?

The Terraform Command-Line Interface (CLI) is used to manage infrastructure and interact with Terraform state, configuration files, providers, etc.

Here are some basic CLI commands:

terraform init – prepares your working directory for other commands
terraform destroy – destroys the previously-created infrastructure
terraform validate – check whether the configuration is valid
terraform apply – creates or updates the infrastructure
terraform plan – shows changes needed by the current configuration

Prerequisites for Terraform:-

  • At least 10GB of disk space on the root volume.
  • At least 40GB of disk space for the Docker data directory (defaults to /var/lib/docker )
  • At least 8GB of system memory.

If you are planning to prepare for the Hashicorp Terraform certification then I would suggest you DevOpsSchool Institutes name where you can get quality training by experts. If you are planning to learn terraform then watch this tutorial and get all info.

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