Terraform Meta-arguments

Day 8 of #30daysofawsterraform challenge

Today I have deep dive into use cases of meta arguments with practicle examples.

What is it?
Meta-arguments are special arguments that can be used with "any resource type" to change the behavior of resources.

Different Meta-arguments:

Count:
Create multiple resource instances based on a number
Eg:
resource "aws_s3_bucket" "nandan_bucket" {
  count  = 3
  bucket = "my-bucket-${count.index}"
  tags = var.tags
}


For_each:
Creating resources from a map or set.
Eg:
resource "aws_s3_bucket" "example" {

for_each = toset(["bucket1", "bucket2", "bucket3"])
bucket = each.value
}

Depends_on:
Ensuring resources are created in specific order
Eg:
resource "aws_s3_bucket" "dependent" {

bucket = "my-bucket"

depends_on = [aws_s3_bucket.primary]
}

Provider:

Use cases:

    Multi-region deployments

    Multi-account setups

    Cross-region replication

Eg:

resource "aws_s3_bucket" "example" {

  provider = aws.west  # Use alternate provider

  bucket   = "my-bucket"

}

Devops #Terraform #AWS

Thanks to Piyush sachdeva The CloudOps Community