venkateshk111 / terraform-beginners-guide

Terraform Beginners Guide and Demos to Practice

Terraform

• 00-Terraform-Basics - Terraform Definitions and more

• 01-Terraform-Installation - Install Terraform

• 02-Terraform-Configuration - Configure Terraform

03-Terraform-Terminologies

• Provider : Define the providers like AWS, Azure, GCP
• Resource : Infrastructure Resources to be created, ex: VPC, S3, EC2
• Data Sources (optional) : Pull the data from the provider
• Variable: Give user option to enter the value for defined resources
• Arguments : Inputs
• Attributes : Outputs
• Meta-Arguments : Terraform specific Inputs ex: count, for_each,depends_on

• 04-Terraform-Top-Level-Blocks - Terraform Top Level Blocks

  • Terraform Block (>0.13 version) or Terraform Settings Block or Terraform Configuration Block
  • Provider Block
  • Resource Block
  • Input Variables Block
  • Output Values Block
  • Local Values Block
  • Data Sources Block
  • Modules Block

• 05-Terraform-Commands - Basic Terraform Commands

  • terraform init
  • terraform validate
  • terraform plan
  • terraform apply or terraform apply -auto-approve
  • terraform destroy or terraform destroy -auto-approve

• 06-Terraform-VPC-Demo - Simple Demo to Create AWS VPC using Terraform

• 07-Terraform-Resources - Understanding Resource behavior

  • created
  • destroyed
  • updated

• 08-Terraform-Resource-Meta-Arguments - Terraform Meta-Arguments

  1. count
  2. for_each
  3. depends_on
  4. provider
  5. lifecycle

• 09-Terraform-Variables - Terraform Variables

  1. Terraform Variables with default Option
  2. Overriding default Variable values with -var Option
  3. Overriding default Variable values with Environment Variables Options
  4. Overriding default Variable values with terraform.tfvars file
  5. Overriding default Variable values with different .tfvars using -var-file Option
  6. Terraform Variables type list
  7. Terraform Variables type map
  8. Custom Validation Rules
  9. Sensitive Variables

• 10-Terraform-Outputs - Terraform Output Values

• 11-Terraform-Data-Sources - Terraform Data Sources

• 12-Terraform-State - Terraform State

• 13-Terraform-Show - Terraform Show (need to update)

• 14-Terraform-Refresh - Terraform Refresh Desired and Current state sync

• 15-Terraform-State-Commands - Inspect, Modify, and Manage the Terraform state

• 16-Terraform-Workspaces - Manage multiple sets of infrastructure (dev, uat, pre, and prd) with the same Terraform configuration

• 17-Terraform-Modules - Reusable terraform codes

• Pending Notes

  • 02-Terraform-Configuration
  • 04-Terraform-Top-Level-Blocks
    • Multiple Providers ( covered in meta argument provider)
  • 05-Terraform-Commands
  • 06-Terraform-VPC-Demo
    • execute the terraform commands to create VPC using vpc.tf and update the command documentation with screenshots
  • 07-Terraform-Resources
    • Terraform resource behavior for in place update (add tag) destroy and recreate (change AZ)
  • 08-Terraform-Resource-Meta-Arguments
    • for_each for set creating iam user notes
  • 11-Terraform-local-values
  • 13-Terraform-Show

• Revise following

  • terraform dependency file ?
  • terraform lock file ?

Project Work

1. Create Simple Web Server
   • AWS Components
     • EC2
     • Security Group to allow port 22
     • Security Group to allow port 80, 443
   • Use Terraform variables where ever possible.

Important Links

• Website: https://www.terraform.io
• Forums: HashiCorp Discuss
• Documentation: https://www.terraform.io/docs/
• Tutorials: HashiCorp's Learn Platform
• Certification Exam: HashiCorp Certified: Terraform Associate

04-Terraform-Top-Level-Blocks

• Terraform Block (>0.13 version) or Terraform Settings Block or Terraform Configuration Block
• Provider Block
• Resource Block
• Input Variables Block
• Output Values Block
• Local Values Block
• Data Sources Block
• Modules Block

terraform apply

$ terraform apply -var-file 03_secrets.tfvars 

Terraform used the selected providers to generate the following execution plan
+ create
Apply complete! Resources: 1 added, 0 changed, 0 destroyed.