atom-cfn-lint

Validate CloudFormation yaml/json templates against the CloudFormation spec and additional checks. Includes checking valid values for resource properties and best practices.
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AWS Cfn Lint Atom

Provides IDE specific integration to cfn-lint

Preview

Requires

cfn-lint

For atom-cfn-lint to work you need to have cfn-lint installed. pip install cfn-lint

Verify Installation

JSON/YAML Templates

Atom-cfn-lint will work with JSON and YAML files but the goal is to only scan CloudFormation templates. As a result we look for AWSTemplateFormatVersion being defined in the file. CloudFormation only requires Resources to be defined but this is too generic for assuming that the file is a CloudFormation template.

Example

You can use the following example to verify that the installation was successful:

AWSTemplateFormatVersion: "2010-09-09"
Resources:
  # Unsupported Type "AWS::EC2::Instance1" 
  MyEC2Instance1:
    Type: "AWS::EC2::Instance1"

Result (Type is marked as an error):

Result

See Templates for more examples.

Contribute

The code for this plugin can be found on GitHub at awslabs/aws-cfn-lint-atom

License

This library is licensed under the Apache 2.0 License.