Terraform Module Block Syntax: Difference between revisions

From NovaOrdis Knowledge Base
Jump to navigation Jump to search
 
(9 intermediate revisions by the same user not shown)
Line 7: Line 7:
=Overview=
=Overview=
<font color=darkgray>TODO: this section must be expanded based on https://www.terraform.io/docs/configuration/modules.html and https://www.terraform.io/docs/modules/index.html</font>
<font color=darkgray>TODO: this section must be expanded based on https://www.terraform.io/docs/configuration/modules.html and https://www.terraform.io/docs/modules/index.html</font>
After adding, removing, or modifying <code>module</code> blocks, [[Terraform_Operations#Initialization|terraform init]] must be re-run to allow Terraform the opportunity to adjust the installed modules. By default this command will not upgrade an already-installed module; use the [[Terraform_Operations#-upgrade|-upgrade]] option to instead upgrade to the newest available version.
=Playground=
{{External|}}


=Example=
=Example=
Line 26: Line 31:


</syntaxhighlight>
</syntaxhighlight>
=Arguments=
==source==
The <code>source</code> argument is required. It is a <font color=darkgray>meta-argument</font> defined by the Terraform CLI. Its value is either the path to the local directory that contains the dependency module's [[Terraform_Concepts#Configuration|configuration]] files or a remote module source that Terraform should download and use. This value must be a literal string with no template sequences; arbitrary expressions are not allowed. For more details see: {{Internal|Terraform_Concepts#Module_Sources|Module Sources}}
===How to Specify a Remote Module===
The syntax specified below (no protocol qualifier) implies that the module path is relative to the [[Terraform_Concepts#Terraform_Registry|Terraform Registry]] URL, specifically https://registry.terraform.io/v1/modules/. This is obvious if [[Terraform_Operations#Verbose_Output_and_Debugging|TF_LOG]] environment variable is set to TRACE.
<syntaxhighlight lang='json'>
module "..." {
  source = "terraform-aws-modules/eks/aws"
  ...
}
</syntaxhighlight>
==version==
{{External|https://www.terraform.io/docs/configuration/modules.html#module-versions}}
Constraint on the dependency module version.

Latest revision as of 01:26, 3 March 2020

External

Internal

Overview

TODO: this section must be expanded based on https://www.terraform.io/docs/configuration/modules.html and https://www.terraform.io/docs/modules/index.html

After adding, removing, or modifying module blocks, terraform init must be re-run to allow Terraform the opportunity to adjust the installed modules. By default this command will not upgrade an already-installed module; use the -upgrade option to instead upgrade to the newest available version.

Playground


Example

module "some-module" {

  source = "terraform-aws-modules/eks/aws"
  version = "~> 9.0"

  cluster_name = local.cluster_name
  vpc_id = var.aws_vpc_id

  ...

  tags = {
    Environment = var.environment_name
  }
}

Arguments

source

The source argument is required. It is a meta-argument defined by the Terraform CLI. Its value is either the path to the local directory that contains the dependency module's configuration files or a remote module source that Terraform should download and use. This value must be a literal string with no template sequences; arbitrary expressions are not allowed. For more details see:

Module Sources

How to Specify a Remote Module

The syntax specified below (no protocol qualifier) implies that the module path is relative to the Terraform Registry URL, specifically https://registry.terraform.io/v1/modules/. This is obvious if TF_LOG environment variable is set to TRACE.

module "..." {

  source = "terraform-aws-modules/eks/aws"
  ...
}

version

https://www.terraform.io/docs/configuration/modules.html#module-versions

Constraint on the dependency module version.