lambda_policy - Creates, updates or deletes AWS Lambda policy statements.

New in version 2.4.


  • This module allows the management of AWS Lambda policy statements. It is idempotent and supports “Check” mode. Use module lambda to manage the lambda function itself, lambda_alias to manage function aliases, lambda_event to manage event source mappings such as Kinesis streams, execute_lambda to execute a lambda function and lambda_facts to gather facts relating to one or more lambda functions.


The below requirements are needed on the host that executes this module.

  • boto
  • boto3
  • python >= 2.6


Parameter Choices/Defaults Comments
The AWS Lambda action you want to allow in this statement. Each Lambda action is a string starting with lambda: followed by the API name (see Operations ). For example, lambda:CreateFunction . You can use wildcard (lambda:* ) to grant permission for all AWS Lambda actions.
Name of the function alias. Mutually exclusive with version.
AWS access key. If not set then the value of the AWS_ACCESS_KEY_ID, AWS_ACCESS_KEY or EC2_ACCESS_KEY environment variable is used.

aliases: ec2_access_key, access_key
AWS secret key. If not set then the value of the AWS_SECRET_ACCESS_KEY, AWS_SECRET_KEY, or EC2_SECRET_KEY environment variable is used.

aliases: ec2_secret_key, secret_key
Url to use to connect to EC2 or your Eucalyptus cloud (by default the module will use EC2 endpoints). Ignored for modules where region is required. Must be specified for all other modules if region is not used. If not set then the value of the EC2_URL environment variable, if any, is used.
Token string representing source ARN or account. Mutually exclusive with source_arn or source_account.
Name of the Lambda function whose resource policy you are updating by adding a new permission.
You can specify a function name (for example, Thumbnail ) or you can specify Amazon Resource Name (ARN) of the
function (for example, arn:aws:lambda:us-west-2:account-id:function:ThumbNail ). AWS Lambda also allows you to
specify partial ARN (for example, account-id:Thumbnail ). Note that the length constraint applies only to the
ARN. If you specify only the function name, it is limited to 64 character in length.

aliases: lambda_function_arn, function_arn
The principal who is getting this permission. It can be Amazon S3 service Principal ( ) if you want Amazon S3 to invoke the function, an AWS account ID if you are granting cross-account permission, or any valid AWS service principal such as . For example, you might want to allow a custom application in another AWS account to push events to AWS Lambda by invoking your function.
(added in 1.6)
Uses a boto profile. Only works with boto >= 2.24.0.
The AWS region to use. If not specified then the value of the AWS_REGION or EC2_REGION environment variable, if any, is used. See

aliases: aws_region, ec2_region
(added in 1.6)
AWS STS security token. If not set then the value of the AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN environment variable is used.

aliases: access_token
The AWS account ID (without a hyphen) of the source owner. For example, if the SourceArn identifies a bucket, then this is the bucket owner's account ID. You can use this additional condition to ensure the bucket you specify is owned by a specific account (it is possible the bucket owner deleted the bucket and some other AWS account created the bucket). You can also use this condition to specify all sources (that is, you don't specify the SourceArn ) owned by a specific account.
This is optional; however, when granting Amazon S3 permission to invoke your function, you should specify this field with the bucket Amazon Resource Name (ARN) as its value. This ensures that only events generated from the specified bucket can invoke the function.
  • present ←
  • absent
Describes the desired state.
A unique statement identifier.

aliases: sid

(added in 1.5)
  • no
  • yes ←
When set to "no", SSL certificates will not be validated for boto versions >= 2.6.0.
Version of the Lambda function. Mutually exclusive with alias.



  • If parameters are not set within the module, the following environment variables can be used in decreasing order of precedence AWS_URL or EC2_URL, AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY or EC2_ACCESS_KEY, AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY or EC2_SECRET_KEY, AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN, AWS_REGION or EC2_REGION
  • Ansible uses the boto configuration file (typically ~/.boto) if no credentials are provided. See
  • AWS_REGION or EC2_REGION can be typically be used to specify the AWS region, when required, but this can also be configured in the boto config file


- hosts: localhost
  gather_facts: no
    state: present
  - name: Lambda S3 event notification
      state: "{{ state | default('present') }}"
      function_name: functionName
      alias: Dev
      statement_id: lambda-s3-myBucket-create-data-log
      action: lambda:InvokeFunction
      source_arn: arn:aws:s3:eu-central-1:123456789012:bucketName
      source_account: 123456789012

  - name: show results
    debug: var=lambda_policy_action

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
describes what action was taken


This module is flagged as preview which means that it is not guaranteed to have a backwards compatible interface.


This module is flagged as community which means that it is maintained by the Ansible Community. See Module Maintenance & Support for more info.

For a list of other modules that are also maintained by the Ansible Community, see here.


  • Pierre Jodouin (@pjodouin)
  • Michael De La Rue (@mikedlr)


If you notice any issues in this documentation you can edit this document to improve it.