Difference between revisions of "Terraform variables: variables.tf"
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| − | + | TOMERGE [[Terraform variables]] | |
* https://www.terraform.io/docs/language/values/variables.html | * https://www.terraform.io/docs/language/values/variables.html | ||
* https://learn.hashicorp.com/tutorials/terraform/aws-variables | * 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 <code>[[variables.tf]]</code> | Definition in <code>[[variables.tf]]</code> | ||
| Line 16: | Line 21: | ||
variable "YourVarName" { | variable "YourVarName" { | ||
| − | [[type]] = string | + | [[Terraform variable types|type]] = [[string]] |
description = "Description of your variable" | description = "Description of your variable" | ||
default = "your_default_value" | default = "your_default_value" | ||
} | } | ||
| − | Usage in <code>[[main.tf]]</code>: | + | == Variable usage == |
| + | Usage in any terraform file (<code>[[main.tf]]</code>), using <code>[[var.]]</code> prefix: | ||
<code>AnyFieldToAssingAValue = [[var.]]YourVarName</code> | <code>AnyFieldToAssingAValue = [[var.]]YourVarName</code> | ||
| + | <code>[[AnyFieldToAssingAValue]] = "${var.YourVarName}-yourtext-here"</code> | ||
| + | |||
| + | yourvar = "${aws_lb.your_lb_resource_name.dns_name}" | ||
== Errors == | == Errors == | ||
| − | * [[Error: No value for required variable]] | + | * <code>[[Error: No value for required variable]]</code> |
| − | * [[Error: Reference to undeclared input variable]] | + | * <code>[[Error: Reference to undeclared input variable]]</code> |
| + | * <code>[[Error: Variables not allowed]]</code> | ||
== Related term == | == Related term == | ||
| Line 33: | Line 43: | ||
* <code>[[variable.tfvars]]</code> | * <code>[[variable.tfvars]]</code> | ||
* <code>[[terraform.tfvars]]</code> | * <code>[[terraform.tfvars]]</code> | ||
| − | * [[ | + | * <code>[[terraform apply]] -var 'myvar=football'</code> |
| − | * <code>[[terraform | + | * <code>[[terraform plan]]</code> |
| + | * <code>[[local.]]</code> | ||
| + | * <code>[[module.]]</code> | ||
| + | * <code>[[data.]]</code> | ||
| + | * <code>[[.name]]</code> | ||
| + | * <code>[[.dns_name]]</code> | ||
| + | * <code>[[.arn]]</code> | ||
| + | * [[Terraform best practices]] | ||
| + | * [[random_string.suffix.result]] | ||
== See also == | == See also == | ||
* {{tf files}} | * {{tf files}} | ||
| − | * | + | * {{Terraform variables}} |
[[Category:Terraform]] | [[Category:Terraform]] | ||
Latest revision as of 09:57, 12 February 2024
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[edit]
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[edit]
Usage in any terraform file (main.tf), using var. prefix:
AnyFieldToAssingAValue = var.YourVarNameAnyFieldToAssingAValue = "${var.YourVarName}-yourtext-here"
yourvar = "${aws_lb.your_lb_resource_name.dns_name}"
Errors[edit]
Error: No value for required variableError: Reference to undeclared input variableError: Variables not allowed
Related term[edit]
main.tfvariable.tfvarsterraform.tfvarsterraform apply -var 'myvar=football'terraform planlocal.module.data..name.dns_name.arn- Terraform best practices
- random_string.suffix.result
See also[edit]
- 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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