DevOps Classroomnotes 20/Oct/2022

Blocks in terraform

• Refer Here

To use provider with specific version

• To find provider browse them in terraform registry Refer Here
• Every provider will have documentation
  • AWS Provider Refer Here
  • Azure Provider Refer Here
• Every provider will have many versions to use a specific version of the provider an additional syntax is required

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 4.0"
    }
  }
}

• Lets try to understand ~>

Using count to create multiple subnets in AWS for ntier-architecture

• For the template developed in the class Refer Here
  
• Terraform has built in functions Refer Here
• We have used the length function to find the length of subnets from variables this helped in setting the count based on list size. Refer Here
• Refer Here for the changes
  
• We have used cidrsubnet function to dynamically create subnet cidr’s Refer Here for the change set. Refer Here for the function documentation.