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# execute_lambda – Execute an AWS Lambda function

- Synopsis

- Requirements

- Parameters

- Notes

- Examples

- Return Values

- Status

## Synopsis

- This module executes AWS Lambda functions, allowing synchronous and asynchronous invocation.

## Requirements

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

- boto

- boto3

- python >= 2.6

## Parameters

Parameter | Choices/Defaults | Comments
--- | --- | ---
aws_access_key string |  | 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 string |  | 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
debug_botocore_endpoint_logs boolean added in 2.8 | Choices: no ← yes | Use a botocore.endpoint logger to parse the unique (rather than total) "resource:action" API calls made during a task, outputing the set to the resource_actions key in the task results. Use the aws_resource_action callback to output to total list made during a playbook. The ANSIBLE_DEBUG_BOTOCORE_LOGS environment variable may also be used.
dry_run boolean | Choices: no ← yes | Do not *actually* invoke the function. A `DryRun` call will check that the caller has permissions to call the function, especially for checking cross-account permissions.
ec2_url string |  | 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.
function_arn - |  | The name of the function to be invoked
name - |  | The name of the function to be invoked. This can only be used for invocations within the calling account. To invoke a function in another account, use function_arn to specify the full ARN.
payload - | Default: {} | A dictionary in any form to be provided as input to the Lambda function.
profile string |  | Uses a boto profile. Only works with boto >= 2.24.0.
region string |  | 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 http://docs.aws.amazon.com/general/latest/gr/rande.html#ec2_region aliases: aws_region, ec2_region
security_token string |  | 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
tail_log boolean | Choices: no ← yes | If `tail_log=yes`, the result of the task will include the last 4 KB of the CloudWatch log for the function execution. Log tailing only works if you use synchronous invocation `wait=yes`. This is usually used for development or testing Lambdas.
validate_certs boolean | Choices: no yes ← | When set to "no", SSL certificates will not be validated for boto versions >= 2.6.0.
version_qualifier - | Default: "LATEST" | Which version/alias of the function to run. This defaults to the `LATEST` revision, but can be set to any existing version or alias. See https://docs.aws.amazon.com/lambda/latest/dg/versioning-aliases.html for details.
wait boolean | Choices: no yes ← | Whether to wait for the function results or not. If wait is `no`, the task will not return any results. To wait for the Lambda function to complete, set `wait=yes` and the result will be available in the output key.

## Notes

Note

- Async invocation will always return an empty `output` key.

- Synchronous invocation may result in a function timeout, resulting in an empty `output` key.

- 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 https://boto.readthedocs.io/en/latest/boto_config_tut.html

- `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

## Examples

    - execute_lambda:
        name: test-function
        # the payload is automatically serialized and sent to the function
        payload:
          foo: bar
          value: 8
      register: response

    # Test that you have sufficient permissions to execute a Lambda function in
    # another account
    - execute_lambda:
        function_arn: arn:aws:lambda:us-east-1:123456789012:function/some-function
        dry_run: true

    - execute_lambda:
        name: test-function
        payload:
          foo: bar
          value: 8
        wait: true
        tail_log: true
      register: response
      # the response will have a `logs` key that will contain a log (up to 4KB) of the function execution in Lambda

    # Pass the Lambda event payload as a json file.
    - execute_lambda:
        name: test-function
        payload: "{{ lookup('file','lambda_event.json') }}"
      register: response

    - execute_lambda:
        name: test-function
        version_qualifier: PRODUCTION

## Return Values

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

Key | Returned | Description
--- | --- | ---
logs string | if tail_log == true | The last 4KB of the function logs. Only provided if tail_log is true
output dictionary | success | Function output if wait=true and the function returns a value Sample: { 'output': 'something' }
status integer | always | `StatusCode` of API call exit (200 for synchronous invokes, 202 for async) Sample: 200

## Status

- This module is not guaranteed to have a backwards compatible interface. [preview]

- This module is maintained by the Ansible Community. [community]

### Authors

- Ryan Scott Brown (@ryansb) <ryansb@redhat.com>

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