Terraform variables: variables.tf
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TOMERGE Terraform variables
- https://www.terraform.io/docs/language/values/variables.html
- https://learn.hashicorp.com/tutorials/terraform/aws-variables
https://cloud.google.com/docs/terraform/best-practices-for-terraform#variables
string number bool
Variable declaration
Definition in variables.tf
variable "YourVarName" {} variable "YourVarName" { default = "your_default_value" } variable "your_subnets" { default = ["subnet-0d68d399b6cf9c2b3", "subnet-055f2f0b4de211111"] }
variable "YourVarName" { default = "your_default_value" }
variable "YourVarName" { type = string description = "Description of your variable" default = "your_default_value" }
Variable usage
Usage in any terraform file (main.tf
), using var.
prefix:
AnyFieldToAssingAValue = var.YourVarName
AnyFieldToAssingAValue = "${var.YourVarName}-yourtext-here"
yourvar = "${aws_lb.your_lb_resource_name.dns_name}"
Errors
Error: No value for required variable
Error: Reference to undeclared input variable
Error: Variables not allowed
Related term
main.tf
variable.tfvars
terraform.tfvars
terraform apply -var 'myvar=football'
terraform plan
local.
module.
data.
.name
.dns_name
.arn
- Terraform best practices
- random_string.suffix.result
See also
- Terraform configuration files, Terraform state files:
.tf
,.tfvars
,main.tf, outputs.tf
,variables.tf
,.terraform.d/
,terraform init
,providers.tf
,.terraform/
,terraform.tfstate
,.terraform.lock.hcl
,terraform.tfstate.d, override.tf, versions.tf
- Terraform variables, types, env variables,
variables.tf
,.tfvars
,nullable
,validation
,terraform.tfvars
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