Python interface to easily generate `serverless.yml`.
Project description
serverless-builder
Python interface to easily generate serverless.yml
.
Massive thanks goes to @dxd1 for his original idea and implementation.
Why
serverless.yml easily can become a massive file with hundreds of lines even if you have only a couple of services. Adding plugins, features, naming patterns etc. become more and more complicated and each change can be really painful due to multiple sections of the file which are affected.
How
serverless-builder is an object oriented builder of the serverless.yml
file with build in support for:
- plugin management (with autoconfiguration)
- function factory (with some best practice hints (DLQ))
- autoconfiguration of some provider specific features like AWS X-Ray
- monitoring support (wip)
- easy resource manipulation with troposphere lib https://github.com/cloudtools/troposphere
- easier IAM management with predefined permission sets
- built-in support for any serverless attributes
Example
from serverless.aws.functions.event_bridge import RetryPolicy
from serverless.aws.functions.http import HTTPFunction
from serverless import Service
from serverless.provider import AWSProvider
from serverless.aws.features import XRay
from serverless.aws.iam.dynamodb import DynamoDBReader
from serverless.plugins import ComposedVars, PythonRequirements, Prune
from troposphere.dynamodb import Table, AttributeDefinition, KeySchema
service = Service(
"service-name",
"some dummy service",
AWSProvider()
)
service.plugins.add(ComposedVars())
service.plugins.add(Prune())
service.plugins.add(PythonRequirements())
table = Table(
"TestTable",
BillingMode="PAY_PER_REQUEST",
AttributeDefinitions=[
AttributeDefinition(AttributeName="name", AttributeType="S")
],
KeySchema=[KeySchema(AttributeName="name", KeyType="HASH")]
)
service.enable(XRay())
service.provider.iam.apply(DynamoDBReader(table))
service.builder.function.generic("test", "description")
service.builder.function.http("test", "description", "/", HTTPFunction.POST)
# Multiple events with different paths and/or methods can be set up for the same handler:
service.builder.function.http("test", "description", ["/", "/alias"], ["POST", "PUT"], handler="shared.handler")
# This will add the same handler to all of these: POST /, POST /alias, PUT /, PUT /alias
event_bridge_function = service.builder.function.event_bridge(
"event_bridge_function",
"sample event bridge function",
"epsy",
{"source": ["saas.external"]},
)
event_bridge_function.use_delivery_dlq(RetryPolicy(5, 300))
event_bridge_function.use_async_dlq()
service.resources.add(table)
service.render()
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