terragrunt

terragrunt documentation

Version in MegaLinter: 0.78.0
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See How to configure terragrunt rules

Configuration in MegaLinter

Enable terragrunt by adding TERRAFORM_TERRAGRUNT in ENABLE_LINTERS variable
Disable terragrunt by adding TERRAFORM_TERRAGRUNT in DISABLE_LINTERS variable

Enable autofixes by adding TERRAFORM_TERRAGRUNT in APPLY_FIXES variable

Variable	Description	Default value
TERRAFORM_TERRAGRUNT_ARGUMENTS	User custom arguments to add in linter CLI call Ex: `-s --foo "bar"`
TERRAFORM_TERRAGRUNT_COMMAND_REMOVE_ARGUMENTS	User custom arguments to remove from command line before calling the linter Ex: `-s --foo "bar"`
TERRAFORM_TERRAGRUNT_FILTER_REGEX_INCLUDE	Custom regex including filter Ex: `(src\\|lib)`	Include every file
TERRAFORM_TERRAGRUNT_FILTER_REGEX_EXCLUDE	Custom regex excluding filter Ex: `(test\\|examples)`	Exclude no file
TERRAFORM_TERRAGRUNT_CLI_LINT_MODE	Override default CLI lint mode - `file`: Calls the linter for each file - `project`: Call the linter from the root of the project	`file`
TERRAFORM_TERRAGRUNT_FILE_EXTENSIONS	Allowed file extensions. `"*"` matches any extension, `""` matches empty extension. Empty list excludes all files Ex: `[".py", ""]`	`[".hcl"]`
TERRAFORM_TERRAGRUNT_FILE_NAMES_REGEX	File name regex filters. Regular expression list for filtering files by their base names using regex full match. Empty list includes all files Ex: `["Dockerfile(-.+)?", "Jenkinsfile"]`	Include every file
TERRAFORM_TERRAGRUNT_PRE_COMMANDS	List of bash commands to run before the linter	None
TERRAFORM_TERRAGRUNT_POST_COMMANDS	List of bash commands to run after the linter	None
TERRAFORM_TERRAGRUNT_UNSECURED_ENV_VARIABLES	List of env variables explicitly not filtered before calling TERRAFORM_TERRAGRUNT and its pre/post commands	None
TERRAFORM_TERRAGRUNT_CONFIG_FILE	terragrunt configuration file nameUse `LINTER_DEFAULT` to let the linter find it	`terragrunt.hcl`
TERRAFORM_TERRAGRUNT_RULES_PATH	Path where to find linter configuration file	Workspace folder, then MegaLinter default rules
TERRAFORM_TERRAGRUNT_DISABLE_ERRORS	Run linter but consider errors as warnings	`false`
TERRAFORM_TERRAGRUNT_DISABLE_ERRORS_IF_LESS_THAN	Maximum number of errors allowed	`0`
TERRAFORM_TERRAGRUNT_CLI_EXECUTABLE	Override CLI executable	`['terragrunt']`

MegaLinter Flavors

This linter is available in the following flavors

Flavor	Description	Embedded linters
all	Default MegaLinter Flavor	127
cupcake	MegaLinter for the most commonly used languages	88
security	Optimized for security	24
terraform	Optimized for TERRAFORM based projects	54

Behind the scenes

How are identified applicable files

File extensions: .hcl
File name don't ends with: .tflint.hcl

How the linting is performed

terragrunt is called one time by identified file (file CLI lint mode)

Example calls

terragrunt hclfmt --terragrunt-check --terragrunt-hclfmt-file myfile.hcl

terragrunt hclfmt --terragrunt-check --terragrunt-config terragrunt.hcl --terragrunt-hclfmt-file myfile.hcl

Help content

Usage: terragrunt [global options] <command> [options]

   Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu/Terraform to scale.
   For documentation, see https://terragrunt.gruntwork.io/.

Main commands:
   backend        Interact with OpenTofu/Terraform backend infrastructure.
   exec           Execute an arbitrary command.
   run            Run an OpenTofu/Terraform command.
   stack          Terragrunt stack commands.

Catalog commands:
   catalog        Launch the user interface for searching and managing your module catalog.
   scaffold       Scaffold a new Terragrunt module.

Discovery commands:
   find, fd       Find relevant Terragrunt configurations.
   list, ls       List relevant Terragrunt configurations.

Configuration commands:
   dag            Interact with the Directed Acyclic Graph (DAG).
   hcl            Interact with HCL files.
   info           List of commands to display Terragrunt settings.
   render         Render the final terragrunt config, with all variables, includes, and functions resolved, in the specified format.

OpenTofu shortcuts:
   apply          Create or update infrastructure.
   destroy        Destroy previously-created infrastructure.
   force-unlock   Release a stuck lock on the current workspace.
   import         Associate existing infrastructure with a OpenTofu/Terraform resource.
   init           Prepare your working directory for other commands.
   output         Show output values from your root module.
   plan           Show changes required by the current configuration.
   refresh        Update the state to match remote systems.
   show           Show the current state or a saved plan.
   state          Advanced state management.
   test           Execute integration tests for OpenTofu/Terraform modules.
   validate       Check whether the configuration is valid.

Global Options:
   --experiment value         Enables specific experiments. For a list of available experiments, see https://terragrunt.gruntwork.io/docs/reference/experiment-mode . [$TG_EXPERIMENT]
   --experiment-mode          Enables experiment mode for Terragrunt. For more information, see https://terragrunt.gruntwork.io/docs/reference/experiment-mode . (default: false) [$TG_EXPERIMENT_MODE]
   --log-custom-format value  Set the custom log formatting. [$TG_LOG_CUSTOM_FORMAT]
   --log-disable              Disable logging. (default: false) [$TG_LOG_DISABLE]
   --log-format value         Set the log format. [$TG_LOG_FORMAT]
   --log-level value          Sets the logging level for Terragrunt. Supported levels: stderr, stdout, error, warn, info, debug, trace. (default: info) [$TG_LOG_LEVEL]
   --log-show-abs-paths       Show absolute paths in logs. (default: false) [$TG_LOG_SHOW_ABS_PATHS]
   --no-color                 Disable color output. (default: false) [$TG_NO_COLOR]
   --non-interactive          Assume "yes" for all prompts. (default: false) [$TG_NON_INTERACTIVE]
   --strict-control value     Enables specific strict controls. For a list of available controls, run 'terragrunt info strict'. [$TG_STRICT_CONTROL]
   --strict-mode              Enables strict mode for Terragrunt. For more information, run 'terragrunt info strict'. (default: false) [$TG_STRICT_MODE]
   --working-dir value        The path to the directory of Terragrunt configurations. Default is current directory. [$TG_WORKING_DIR]
   --help, -h                 Show help. (default: false)
   --version, -v              Show terragrunt version. (default: false)

Version: v0.78.0

Author: Gruntwork <www.gruntwork.io>

Installation on mega-linter Docker image

Dockerfile commands :

# renovate: datasource=docker depName=alpine/terragrunt
ARG TERRAFORM_TERRAGRUNT_VERSION=1.11.4
FROM alpine/terragrunt:${TERRAFORM_TERRAGRUNT_VERSION} AS terragrunt
COPY --link --from=terragrunt /usr/local/bin/terragrunt /usr/bin/