pcf.particle.aws.lambda_function package

Submodules

pcf.particle.aws.lambda_function.lambda_function module

class pcf.particle.aws.lambda_function.lambda_function.LambdaFunction(particle_definition)

Bases: pcf.core.aws_resource.AWSResource

This is the implementation of Amazon’s lambda service. This particle works with function code in a zipfile located locally and in s3. Note that having a zipfile locally versus s3 has a slightly different configuration format.

RETURN_PARAM_FILTER = {'CodeSha256', 'DeadLetterConfig', 'Description', 'Environment', 'FunctionName', 'Handler', 'KMSKeyArn', 'MemorySize', 'Role', 'Runtime', 'Timeout', 'TracingConfig', 'VpcConfig'}

S3_PARAM_CONVERSIONS = {'S3Bucket': 'Bucket', 'S3Key': 'Key', 's3ObjectVersion': 'VersionId'}

START_PARAM_FILTER = {'Code', 'DeadLetterConfig', 'Description', 'Environment', 'FunctionName', 'Handler', 'KMSKeyArn', 'MemorySize', 'Publish', 'Role', 'Runtime', 'Tags', 'Timeout', 'TracingConfig', 'VpcConfig'}

UNIQUE_KEYS = ['aws_resource.FunctionName']

UPDATE_PARAM_FILTER = {'DeadLetterConfig', 'Description', 'Environment', 'FunctionName', 'Handler', 'KMSKeyArn', 'MemorySize', 'Role', 'Runtime', 'Timeout', 'TracingConfig', 'VpcConfig'}

_LambdaFunction__s3_to_sha256()

Looks to see if the zipfile located in s3 has a tag with the latest sha256. If there is no tag it calculates the hash and adds the tag.

Returns:base 64 hash

_LambdaFunction__zip_local_to_sha256()

Hashes the contents of a local zipfile using sha256

Returns:base 64 hash

_LambdaFunction__zipfile_to_sha256()

returns the contents of the lambda code as a sha256 hash. There is a separate process for the code stored locally or in s3

Returns:hash

_set_unique_keys()

Logic that sets keys from state definition that are used to uniquely identify the Lambda Function

_start()

Starts the lambda particle that matches desired state definition

Returns:response of boto3 create_function

_stop()

Lambda function does not have a stopped state so calls terminate.

_terminate()

Starts the lambda particle that matches the function_name

Returns:response of boto3 delete_function

_update()

Updates the lambda function particle to match current state definition. There is a different function call if the update is the function code in the zipfile or a configuration variable.

file_get_contents()

Function gets and reads contents of local zipfile

Returns:file contents

flavor = 'lambda_function'

get_status()

Calls the get function configuration boto call and returns status missing if the function does not exist. Otherwise will return the current definition.

Returns:current definition

is_state_definition_equivalent()

Compares the desired state and current state definitions.

Returns:bool

s3client

Create a s3 client if the zipfile is located in s3.

Returns:s3 client

sync_state()

Lambda function implementation of sync state. Calls get status and sets the current state.

Module contents