AWS CLI Command Reference

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[ aws . cloudformation ]

validate-template

Description

Validates a specified template. CloudFormation first checks if the template is valid JSON. If it isn't, CloudFormation checks if the template is valid YAML. If both these checks fail, CloudFormation returns a template validation error.

See also: AWS API Documentation

Synopsis

  validate-template
[--template-body <value>]
[--template-url <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]

Options

--template-body (string)

Structure containing the template body with a minimum length of 1 byte and a maximum length of 51,200 bytes.

Conditional: You must pass TemplateURL or TemplateBody . If both are passed, only TemplateBody is used.

--template-url (string)

Location of file containing the template body. The URL must point to a template (max size: 460,800 bytes) that is located in an Amazon S3 bucket or a Systems Manager document. The location for an Amazon S3 bucket must start with https:// .

Conditional: You must pass TemplateURL or TemplateBody . If both are passed, only TemplateBody is used.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination. If automatic pagination is disabled, the AWS CLI will only make one call, for the first page of results.

--output (string)

The formatting style for command output.

  • json
  • text
  • table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

  • on
  • off
  • auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.

Examples

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal's quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To validate an AWS CloudFormation template

The following validate-template command validates the sampletemplate.json template:

aws cloudformation validate-template --template-body file://sampletemplate.json

Output:

{
    "Description": "AWS CloudFormation Sample Template S3_Bucket: Sample template showing how to create a publicly accessible S3 bucket. **WARNING** This template creates an S3 bucket. You will be billed for the AWS resources used if you create a stack from this template.",
    "Parameters": [],
    "Capabilities": []
}

For more information, see Working with AWS CloudFormation Templates in the AWS CloudFormation User Guide.

Output

Parameters -> (list)

A list of TemplateParameter structures.

(structure)

The TemplateParameter data type.

ParameterKey -> (string)

The name associated with the parameter.

DefaultValue -> (string)

The default value associated with the parameter.

NoEcho -> (boolean)

Flag indicating whether the parameter should be displayed as plain text in logs and UIs.

Description -> (string)

User defined description associated with the parameter.

Description -> (string)

The description found within the template.

Capabilities -> (list)

The capabilities found within the template. If your template contains IAM resources, you must specify the CAPABILITY_IAM or CAPABILITY_NAMED_IAM value for this parameter when you use the CreateStack or UpdateStack actions with your template; otherwise, those actions return an InsufficientCapabilities error.

For more information, see Acknowledging IAM resources in CloudFormation templates .

(string)

CapabilitiesReason -> (string)

The list of resources that generated the values in the Capabilities response element.

DeclaredTransforms -> (list)

A list of the transforms that are declared in the template.

(string)