🚀Day 2: Mastering Terraform's HCL Syntax and Configuration

✍️ Task 1: Familiarize with the HCL syntax used in Terraform*.*

1. HCL Block: This is the fundamental structure of Terraform’s configuration language. A block contains a label and a body, where the body can contain other blocks, arguments, or parameters.

2. Parameters and Arguments: Parameters are the variables declared within a block that expect a value. Arguments assign a value to a name within a block.

✍️ Task 2: Understand variables, data types, and expressions in HCL

1. Variables: These are declared in a variables.tf file and can be used to customize Terraform configurations. Here’s an example of how to define a variable:

variable "example_variable" {
  description = "An example variable"
  type        = string
  default     = "default value"
}

2. Data Types: Terraform supports string, number, bool, list, map, etc.

3. Expressions: These are used to reference or add values within a configuration.

✍️ Task 3: Practice writing Terraform configurations using HCL syntax

• Add required_providers to the configuration, such as Docker or AWS.

• Test configuration using the Terraform CLI and make necessary adjustments.

# This block specifies the required providers for the Terraform configuration. In this case, it's specifying that the AWS provider from HashiCorp with a greater version constraint of 3.27 is needed.
terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "> 3.27"
    }
  }
}

# This section defines a variable named "filename" with a description and the variable string.
variable "filename" {
  description = "The name of the file"
  type        = string
}

# This block defines a local file resource named "example". It specifies that the content of the file should be "Hello, World!" and the filename should be defined by the value of the "filename" variable defined earlier.
resource "local_file" "example" {
  filename = var.filename
  content  = "Hello, World!"
}

# An output named "file_output" which records the filename of the local file resource defined earlier. It allows this information to be displayed after applying the Terraform configuration.
output "file_output" {
  value = local_file.example.filename
}

Happy Learning :) 🙌⚡

✅ Feel free to reach out if you have any questions. I'm delighted to help! 😊

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