Terraform contd

ntier-aws

• Lets apply backend to ntier-aws to store in s3 bucket Refer Here
• Refer Here for the changes
• As we have observed when multiple users try to execute at the same time only user gets the lock and others user have to wait till the lock is released
  

ntier-azure

• Refer Here for azurerm backend
• Refer Here for the changes done to accomodate backends
  
• Refer Here for the new vars for a qa environment
• Create a new workspace qa
  
• Once we create state file will be stored with qa information.
• Exercise: Try doing the same workspace concept in aws.

Concepts

Workspaces

• Terraform workspaces allows us to create multiple environments from the same template.
• By default we were working with a workspace called as default
• Refer Here for official docs

Other topics

• for each in terraform Refer Here
• Refer Here for changeset
• conditional resource creation Refer Here for conditional expression

resource "aws_s3_bucket" "item" {
  count      = terraform.workspace == "default" ? 1: 0
  bucket     = random_string.bucket_names[count.index].id
  depends_on = [random_string.bucket_names]
}


resource "random_string" "bucket_names" {
  count   = terraform.workspace == "default" ? 1: 0
  length  = 8
  special = false
  lower   = true
  numeric = false
}

Activity: Importing terraform resources

• Azure:
  • Create a resource group
  • create a new folder in your system and configure terraform azurerm provider
• AWS:
  • Create a vpc
  • create a new folder in your system and configure terraform aws provider
• import command Refer Here
• Refer classroom video for importing resources

Exercise: Make a note of observation

• Create 3 s3_buckets/storage_accounts resources
  • delete one resource from terraform and reexecute apply
• Out of 3 resources i dont want terraform to control one resource any more
• importing a new resource into terraform state