Note_Tech

All technological notes.

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Terraform workflow

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• Terraform workflow
  • Workflow
    • Common Commands

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Workflow

• Workflow
  • write -> Plan -> Apply
  • terraform init -> terraform validate -> terraform plan -> terraform apply
• Plan with a planfile is recommended terraform plan planfile
  • a way to save the changes to be applied.
• Common CICD:
  • terraform init
  • terraform validate
  • terraform plan planfile
  • terraform apply planfile -auto-approve

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• For a specific resource
  • When working for a big project that includs a large mount of resource, the terrafor plan step might take a long time.
  • To speed up without checking all of the resources, terraform apply -target resource_type.resource_name plan_file can be used.
  • ONLY USE in DEV

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Common Commands

Command	Description
terraform fmt	Rewrites Terraform configuration files to a canonical format.
terraform validate	Checks whether the configuration files are valid.
terraform plan	Creates an execution plan showing the changes that Terraform plans to make.
terraform plan -out plan_file	Save the generated plan to a file on disk
terraform apply	Creates and executes a new execution plan with an interative prompt
terraform apply -target module.module_name	Apply only a module
terraform apply plan_file	Apply a plan from a file
terraform apply -auto-approve	Skips interactive approval of the plan
terraform destroy	Destroys the Terraform-managed infrastructure.
terraform destroy -auto-approve	Skips interactive approval of the plan
terraform destroy -target aws_instance.example	Destroys a specific infrastructure.
terraform refresh	Updates the state file against real resources in a provider.
terraform state	Advanced state management commands for your Terraform state.
terraform output	Displays outputs from your Terraform state data.