Lambdas

Use this module to create lambdas for the project.

lambdas.ScheduledLambdas

A lambda function scheduled by event bridge.

Terraform resources:

1. IamRole: Role for the lambda.
2. LambdaFunction; The lambda function.
3. CloudwatchLogGroup: Log group for logging.
4. CloudwatchEventRule: Schedule event rule.
5. CloudwatchEventTarget: Attach event rule to the function.
6. LambdaPermission; Allow invokation of the function from CloudWhatch.

Arguments

Name	Type	Description
name	str	Name of the lambda function
schedule_expression	str	A valid scheduled expression, ex: 'rate(1 hour)'
filename	str	Path to the zipfile containing lambda code
policies	list	List of policies arn to attach to the function
memory_size	int	Lambda memory size in MB
timeout	int	Timeout of the function
environement	dict	Environement variable to pass to the function
tags	dict	Tags for all resource, must include a 'project' and 'env' key

lambdas.InvokableLambdas

A lambda function usable by other services.

Terraform resources:

1. IamRole: Role for the lambda.
2. LambdaFunction; The lambda function.
3. CloudwatchLogGroup: Log group for logging.
4. LambdaPermission; Allow invokation of the function from the consumer.

Arguments

Name	Type	Description
name	str	Name of the lambda function
filename	str	Path to the zipfile containing lambda code
policies	list	List of policies arn to attach to the function
invoke_principal	str	Principal of the consumer of the lambda (lambda.amazonaws.com, ec2.amazonaws.com, etc.)
invoke_from_arn	str	ARN of the consumer(s)
memory_size	int	Lambda memory size in MB
timeout	int	Timeout of the function
environement	dict	Environement variable to pass to the function
tags	dict	Tags for all resource, must include a 'project' and 'env' key

Example

Create a schudled lambda that runs every minute:

from src.lambdas import ScheduledLambdas

tags = {
    "project": "My Project",
    "env": "dev"
}

ScheduledLambdas(
    self,
    "lambda",
    name="do-something-every-minute",
    schedule_expression="rate(1 minute)",
    filename="path/to/my/zipfile.zip",
    policies=[read_my_db_policy_arn],
    memory_size=512,
    timeout=20,
    environement={},
    tags=tags,
)

Create a lambda that can be invoke in any lambda:

from src.lambdas import InvokableLambdas

InvokableLambdas(
    self,
    "lambda",
    name="usefull-lambda",
    filename="path/to/my/zipfile.zip",
    policies=[],
    invoke_principal="lambda.amazonaws.com",
    invoke_from_arn="arn:aws:lambda:region:account-id:function:*",
    memory_size=512,
    timeout=20,
    environement={},
    tags=tags,
)