Terraform for absolute beginners

Explore the HashiCorp configuration language (HCL) basics for Terraform, including arguments and blocks, and how resource and input blocks with filename and content arguments define infrastructure configuration.

Discover how providers in Terraform act as plugins that translate configurations into API calls, enabling resource management across AWS, Azure, Google Cloud Platform, and more, with init and version pinning.

Explore terraform providers, browse registry.terraform.io for official, partner, and community providers, and learn to pin a specific provider version with the required_providers block and terraform init.

Explore using input variables in Terraform to decouple configuration from code, applying variable values for file name and content in a local file resource.

Declare and reference input variables with a variable block, use defaults to set values, and apply types such as string, number, bool, or any to control Terraform configurations.

Learn how to declare and type variables in Terraform with practical examples, including string and number types, defaults, description, nullable, sensitive, and validation, then apply to a local file resource.

Explore how Terraform resolves input variable values from environment variables and tfvars. Understand the precedence, noting dash var-file has the highest priority and auto files follow lexical order.

Declare and use output variables in Terraform to surface resource attributes, such as a random integer result and an AWS instance public IP, via terraform apply and the output command.

Explore explicit dependencies in Terraform by using the depends_on meta-argument to force creation order between resources, illustrated with a random integer and a local file.

Explore the difference between mutable and immutable infrastructure, and learn how Terraform's lifecycle meta-arguments, including create before destroy, prevent destroy, ignore changes, and replace triggered by, control resource updates.