Resource block

Q: How deeply does Terraform in Depth: Infrastructure as Code with Terraform and OpenTofu cover resource block?

Explains provider mapping, labels, references, and arguments, while deferring more advanced Terraform language features.

As explained in Terraform in Depth: Infrastructure as Code with Terraform and OpenTofu

A resource block is a Terraform configuration block that declares an infrastructure resource type, identifier, and arguments.

A resource block declares a real infrastructure component for Terraform to launch and manage. Its resource type maps through a provider to an infrastructure type, such as an AWS instance, DNS record, repository, or pull request. section 2.5 section 2.0

Resource blocks use two labels: a resource type and an identifier. Together with the block type, these labels form a unique reference such as resource.aws_instance.hello_world, which lets other blocks use its attributes as arguments. section 2.2.2

An AWS instance resource

resource "aws_instance" "hello_world" { ami = data.aws_ami.ubuntu.id subnet_id = data.aws_subnets.main.ids[0] instance_type = var.instance_type } The first label, aws_instance, identifies the provider-backed resource type. The second, hello_world, identifies this resource within the module. Its arguments consume values from data sources and a variable. section 2.2.2

Use resource blocks to:

Represent each infrastructure component Terraform should launch and manage. section 2.5
Choose a provider-specific type that matches the intended infrastructure. section 2.5
Give each resource a unique identifier so other blocks can reference it precisely. section 2.2.2

How Terraform in Depth: Infrastructure as Code with Terraform and OpenTofu covers it

Cover of Terraform in Depth: Infrastructure as Code with Terraform and OpenTofu

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Related concepts

resource typeconfigures · A resource type is a classification identifying the kind of resource represented and the properties, arguments, or capabilities associated with it.
count meta-argumentconfigured by · The Terraform count meta-argument creates zero or more instances of a resource or module according to an integer expression.
meta argumentconfigured by · A meta argument is a built-in Terraform argument that controls how Terraform processes a block rather than configuring the underlying infrastructure.
Terraformused by · Terraform is an open-source infrastructure-as-code tool for defining, provisioning, and managing infrastructure resources through declarative configuration.

This explainer was generated by Manning's knowledge graph from the text of Terraform in Depth: Infrastructure as Code with Terraform and OpenTofu. The section links point to the parts of the book it draws on.