Terragrunt supports operating in a mode referred to as “Strict Mode”.
Strict Mode is a set of controls that can be enabled to ensure that your Terragrunt usage is future-proof by making deprecated features throw errors instead of warnings. This can be useful when you want to ensure that your Terragrunt code is up-to-date with the latest conventions to avoid breaking changes in future versions of Terragrunt.
Whenever possible, Terragrunt will initially provide you with a warning when you use a deprecated feature, without throwing an error. However, in Strict Mode, these warnings will be converted to errors, which will cause the Terragrunt command to fail.
The simplest way to enable strict mode is to set the TERRAGRUNT_STRICT_MODE environment variable to true.
This will enable strict mode for all Terragrunt commands, for all strict mode controls.
$ terragrunt plan-all
15:26:08.585 WARN The `plan-all` command is deprecated and will be removed in a future version. Use `terragrunt run-all plan` instead.
$ TERRAGRUNT_STRICT_MODE='true' terragrunt plan-all
15:26:23.685 ERROR The `plan-all` command is no longer supported. Use `terragrunt run-all plan` instead.
Instead of setting this environment variable, you can also enable strict mode for specific controls by setting the TERRAGRUNT_STRICT_CONTROL
environment variable to a value that’s specific to a particular strict control.
This can allow you to gradually increase your confidence in the future compatibility of your Terragrunt usage.
$ TERRAGRUNT_STRICT_CONTROL='apply-all' terragrunt plan-all
15:26:08.585 WARN The `plan-all` command is deprecated and will be removed in a future version. Use `terragrunt run-all plan` instead.
$ TERRAGRUNT_STRICT_CONTROL='plan-all' terragrunt plan-all
15:26:23.685 ERROR The `plan-all` command is no longer supported. Use `terragrunt run-all plan` instead.
You can also enable multiple strict controls at once with a comma delimited list.
$ TERRAGRUNT_STRICT_CONTROL='plan-all,apply-all' bash -c 'terragrunt plan-all; terragrunt apply-all'
15:26:46.521 ERROR The `plan-all` command is no longer supported. Use `terragrunt run-all plan` instead.
15:26:46.521 ERROR Unable to determine underlying exit code, so Terragrunt will exit with error code 1
15:26:46.564 ERROR The `apply-all` command is no longer supported. Use `terragrunt run-all apply` instead.
15:26:46.564 ERROR Unable to determine underlying exit code, so Terragrunt will exit with error code 1
The following strict mode controls are available:
Throw an error when using the spin-up command.
Reason: The spin-up command is deprecated and will be removed in a future version. Use terragrunt run-all apply instead.
Throw an error when using the tear-down command.
Reason: The tear-down command is deprecated and will be removed in a future version. Use terragrunt run-all destroy instead.
Throw an error when using the plan-all command.
Reason: The plan-all command is deprecated and will be removed in a future version. Use terragrunt run-all plan instead.
Throw an error when using the apply-all command.
Reason: The apply-all command is deprecated and will be removed in a future version. Use terragrunt run-all apply instead.
Throw an error when using the destroy-all command.
Reason: The destroy-all command is deprecated and will be removed in a future version. Use terragrunt run-all destroy instead.
Throw an error when using the output-all command.
Reason: The output-all command is deprecated and will be removed in a future version. Use terragrunt run-all output instead.
Throw an error when using the validate-all command.
Reason: The validate-all command is deprecated and will be removed in a future version. Use terragrunt run-all validate instead.
Disable reading of dependency inputs to enhance dependency resolution performance by preventing recursively parsing Terragrunt inputs from dependencies.
Reason: Enabling the skip-dependencies-inputs option prevents the recursive parsing of Terragrunt inputs, leading to optimized performance during dependency resolution.
Install
