DevOps Classroom Notes 08/08/2021

What is Terraform state

• Every time we run terraform it records information about the infrastructure it created in the Terraform state file. By default when we run terraform in a folder , terrafrom creates a file in the same folder terraform.tfstate.
• This file is in JSON format that records mapping of terraform resources in our configuration file to the representation of resources in the real world
• Note: This state file format is private API for terraform and changes for every release, we should never edit the terraform.tfstate file.
• When we can configure terraform in such a way that it stores the tfstate file in common location, we can use terraform with in a team
• This feature we will be learning soon & is called as Remote Backend.
• Now lets apply the infrastructure which we are building and view the state file
• Refer Here for the private route table.

Lets try to create the ntier with vm on Azure

• Architecture to be realized
• In the visual studio lets add an extension of terraform azure by microsoft
• The Azure provider for terraform Refer Here
• To get Azure Credentials

  • Login into Azure and launch cloud shell

  • Lets execute a command az ad sp create-for-rbac --query "{client_id: appId, client_secret: password, tenant_id: tenant }

  • Preserve the output to some notepad

  • Now execute the following command “`az account show –query "{ subscription_id: id}" and preserve the subscription id

• Creating a virtual network with three subnets
  • Manually (refer classroom video as well)
• Terraform configuration applied for azure Refer Here.
• Refer Here for the changeset containing changes to add network security group and network interface
• Now lets try to create an azure linux ubuntu vm
  • Refer Here for the changeset