Terraform variables

• https://www.terraform.io/language/values/variables: string, number, bool, any
• Terraform Cloud: https://www.terraform.io/cloud-docs/workspaces/variables

Using command line parameters:

• terraform apply -var="image_id=ami-abc123"
• terraform apply -var="image_id=ami-abc123 -var="your_second_var=yourvalue"

Using a file:

• terraform apply -var-file="your_file.tfvars"

Related

• Terraform variable types
• Terraform: variables.tf
• Variables
• auto.tfvars
• validation block introduced in terraform CLI v0.13.0 (August 2020)
• output
• -var-file

See also

• Terraform variables, types, env variables, variables.tf, .tfvars, nullable, validation, terraform.tfvars
• Terraform, OpenTofu, Installation, Terraform AWS, Terraform GCP, Terraform commands, Terraform Cloud, Terraform Enterprise (TFE), HCL, HIL, meta-arguments, providers, modules, resource, provisioners, data sources, backends: remote backends, examples, configuration files, state files, variables, types, Terraform Registry, conditionals: depends_on, functions, Blocks, dynamic blocks, errors, Terragrunt, Terraformer, Terratest, Terraform certifications, Terraform map type, Terraform Associate, Terraform: list type, TF_VAR_, TF_LOG, Terraform provider versioning, Terraform Style Conventions, Required version, Terraform plugin, Terraform Named Values, tags, Changelog, tfsec, tflint, Operators, Expressions: for, splat, Debugging, Namespaces, Terraform Landing Zones, CDKTF, Atmos