A child module can always access variables declared in its parent module.

Child modulesdo not automatically inheritvariables from the parent module.

To pass values from theparent moduleto thechild module, you mustexplicitly define input variablesin the child module and pass them in the parent module.

Example:

hcl

CopyEdit

module "example" {

source = "./child_module"

var1 = "value"

}

Official Terraform Documentation Reference:

Passing Variables to Modules