terraform

Description

Resolves a Terraform stack and either applies it automatically (if autoApply: true) or warns when the stack resources are not up-to-date.

Note: It is not recommended to set autoApply to true for any production or shared environments, since this may result in accidental or conflicting changes to the stack. Instead, it is recommended to manually plan and apply using the provided plugin commands. Run garden plugins terraform for details.

Stack outputs are made available as service outputs, that can be referenced by other modules under ${runtime.services.<module-name>.outputs.<key>}. You can template in those values as e.g. command arguments or environment variables for other services.

Note that you can also declare a Terraform root in the terraform provider configuration by setting the initRoot parameter. This may be preferable if you need the outputs of the Terraform stack to be available to other provider configurations, e.g. if you spin up an environment with the Terraform provider, and then use outputs from that to configure another provider or other modules via ${providers.terraform.outputs.<key>} template strings.

See the for a high-level introduction to the terraform provider.

Below is the full schema reference. For an introduction to configuring Garden modules, please look at our .

The contains the complete YAML schema, and the describes each schema key.

terraform modules also export values that are available in template strings. See the section below for details.

Complete YAML Schema

The values in the schema below are the default values.

Configuration Keys

apiVersion

The schema version of this config (currently not used).

kind

type

The type of this module.

Example:

name

The name of this module.

Example:

build

Specify how to build the module. Note that plugins may define additional keys on this object.

build.dependencies[]

A list of modules that must be built before this module is built.

Example:

build.dependencies[].name

Module name to build ahead of this module.

build.dependencies[].copy[]

Specify one or more files or directories to copy from the built dependency to this module.

build.dependencies[].copy[].source

POSIX-style path or filename of the directory or file(s) to copy to the target.

build.dependencies[].copy[].target

POSIX-style path or filename to copy the directory or file(s), relative to the build directory. Defaults to the same as source path.

build.timeout

Maximum time in seconds to wait for build to finish.

description

A description of the module.

disabled

Set this to true to disable the module. You can use this with conditional template strings to disable modules based on, for example, the current environment or other variables (e.g. disabled: ${environment.name == "prod"}). This can be handy when you only need certain modules for specific environments, e.g. only for development.

Disabling a module means that any services, tasks and tests contained in it will not be deployed or run. It also means that the module is not built unless it is declared as a build dependency by another enabled module (in which case building this module is necessary for the dependant to be built).

If you disable the module, and its services, tasks or tests are referenced as runtime dependencies, Garden will automatically ignore those dependency declarations. Note however that template strings referencing the module's service or task outputs (i.e. runtime outputs) will fail to resolve when the module is disabled, so you need to make sure to provide alternate values for those if you're using them, using conditional expressions.

include[]

Specify a list of POSIX-style paths or globs that should be regarded as the source files for this module. Files that do not match these paths or globs are excluded when computing the version of the module, when responding to filesystem watch events, and when staging builds.

Also note that specifying an empty list here means no sources should be included.

Example:

exclude[]

Specify a list of POSIX-style paths or glob patterns that should be excluded from the module. Files that match these paths or globs are excluded when computing the version of the module, when responding to filesystem watch events, and when staging builds.

Unlike the modules.exclude field in the project config, the filters here have no effect on which files and directories are watched for changes. Use the project modules.exclude field to affect those, if you have large directories that should not be watched for changes.

Example:

repositoryUrl

A remote repository URL. Currently only supports git servers. Must contain a hash suffix pointing to a specific branch or tag, with the format: #<branch|tag>

Garden will import the repository source code into this module, but read the module's config from the local garden.yml file.

Example:

allowPublish

When false, disables pushing this module to remote registries.

generateFiles[]

A list of files to write to the module directory when resolving this module. This is useful to automatically generate (and template) any supporting files needed for the module.

generateFiles[].sourcePath

POSIX-style filename to read the source file contents from, relative to the path of the module (or the ModuleTemplate configuration file if one is being applied). This file may contain template strings, much like any other field in the configuration.

generateFiles[].targetPath

POSIX-style filename to write the resolved file contents to, relative to the path of the module source directory (for remote modules this means the root of the module repository, otherwise the directory of the module configuration).

Note that any existing file with the same name will be overwritten. If the path contains one or more directories, they will be automatically created if missing.

generateFiles[].resolveTemplates

By default, Garden will attempt to resolve any Garden template strings in source files. Set this to false to skip resolving template strings. Note that this does not apply when setting the value field, since that's resolved earlier when parsing the configuration.

generateFiles[].value

The desired file contents as a string.

variables

A map of variables to use when applying the stack. You can define these here or you can place a terraform.tfvars file in the working directory root.

If you specified variables in the terraform provider config, those will be included but the variables specified here take precedence.

varfile

Specify a path (relative to the module root) to a file containing variables, that we apply on top of the module-level variables field.

The format of the files is determined by the configured file's extension:

• .yaml/.yml - YAML. The file must consist of a YAML document, which must be a map (dictionary). Keys may contain any value type.

• .json - JSON. Must contain a single JSON object (not an array).

NOTE: The default varfile format will change to YAML in Garden v0.13, since YAML allows for definition of nested objects and arrays.

To use different module-level varfiles in different environments, you can template in the environment name to the varfile name, e.g. varfile: "my-module.${environment.name}.env (this assumes that the corresponding varfiles exist).

Example:

allowDestroy

If set to true, Garden will run terraform destroy on the stack when calling garden delete env or garden delete service <module name>.

autoApply

If set to true, Garden will automatically run terraform apply -auto-approve when the stack is not up-to-date. Otherwise, a warning is logged if the stack is out-of-date, and an error thrown if it is missing entirely.

NOTE: This is not recommended for production, or shared environments in general!

Defaults to the value set in the provider config.

dependencies[]

The names of any services that this service depends on at runtime, and the names of any tasks that should be executed before this service is deployed.

root

Specify the path to the working directory root—i.e. where your Terraform files are—relative to the module root.

version

The version of Terraform to use. Defaults to the version set in the provider config. Set to null to use whichever version of terraform that is on your PATH.

workspace

Use the specified Terraform workspace.

Outputs

Module Outputs

The following keys are available via the ${modules.<module-name>} template string key for terraform modules.

${modules.<module-name>.buildPath}

The build path of the module.

Example:

${modules.<module-name>.name}

The name of the module.

${modules.<module-name>.path}

The local path of the module.

Example:

${modules.<module-name>.var.*}

A map of all variables defined in the module.

${modules.<module-name>.var.<variable-name>}

${modules.<module-name>.version}

The current version of the module.

Example:

Service Outputs

The following keys are available via the ${runtime.services.<service-name>} template string key for terraform module services. Note that these are only resolved when deploying/running dependants of the service, so they are not usable for every field.

${runtime.services.<service-name>.version}

The current version of the service.

Example:

${runtime.services.<service-name>.outputs.*}

A map of all the outputs defined in the Terraform stack.

${runtime.services.<service-name>.outputs.<name>}

Task Outputs

The following keys are available via the ${runtime.tasks.<task-name>} template string key for terraform module tasks. Note that these are only resolved when deploying/running dependants of the task, so they are not usable for every field.

${runtime.tasks.<task-name>.version}

The current version of the task.

Example: