terragrunt.hcl
to your projectYou can set values for your module’s input parameters by specifying an inputs
block in terragrunt.hcl
:
inputs = {
instance_type = "t2.micro"
instance_count = 10
tags = {
Name = "example-app"
}
}
Whenever you run a Terragrunt command, Terragrunt will set any inputs you pass in as environment variables. For example, with the terragrunt.hcl
file above, running terragrunt apply
is roughly equivalent to:
$ terragrunt apply
# Roughly equivalent to:
TF_VAR_instance_type="t2.micro" \
TF_VAR_instance_count=10 \
TF_VAR_tags='{"Name":"example-app"}' \
tofu apply # or terraform apply
Note that Terragrunt will respect any TF_VAR_xxx
variables you’ve manually set in your environment, ensuring that anything in inputs
will NOT override anything you’ve already set in your environment.
Terragrunt follows the same variable precedence as tofu.
If the same variable is assigned multiple values, OpenTofu will use the last value it finds overriding any previous values.
Variables are loaded in the following order:
Environment variables.
terraform.tfvars
file, if present.
terraform.tfvars.json
file, if present.
Any *.auto.tfvars
/*.auto.tfvars.json
files, processed in order of their filenames.
Any -var
/-var-file
options on the command line, in the order they are provided.