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serverless-offline-sqs
Advanced tools
Readme
This Serverless-offline plugin emulates AWS λ and SQS queue on your local machine. To do so, it listens SQS queue and invokes your handlers.
Features:
First, add serverless-offline-sqs
to your project:
npm install serverless-offline-sqs
Then inside your project's serverless.yml
file, add following entry to the plugins section before serverless-offline
(and after serverless-webpack
if present): serverless-offline-sqs
.
plugins:
- serverless-webpack
- serverless-offline-sqs
- serverless-offline
To be able to emulate AWS SQS queue on local machine there should be some queue system actually running. One of the existing implementations suitable for the task is ElasticMQ.
ElasticMQ is a standalone in-memory queue system, which implements AWS SQS compatible interface. It can be run either stand-alone or inside Docker container. See example sqs
service setup.
We also need to setup actual queue in ElasticMQ server, we can use AWS cli tools for that. In example, we spawn-up another container with aws-cli
pre-installed and run initialization script, against ElasticMQ server in separate container.
Once ElasticMQ is running and initialized, we can proceed with the configuration of the plugin.
Note that starting from version v3.1 of the plugin, it supports autocreation of SQS fifo queues that are specified in the cloudformation Resources
.
The configuration of function of the plugin follows the serverless documentation.
functions:
mySQSHandler:
handler: handler.compute
events:
- sqs: arn:aws:sqs:region:XXXXXX:MyFirstQueue
- sqs:
arn: arn:aws:sqs:region:XXXXXX:MySecondQueue
- sqs:
queueName: MyThirdQueue
arn:
Fn::GetAtt:
- MyThirdQueue
- Arn
- sqs:
arn:
Fn::GetAtt:
- MyFourthQueue
- Arn
- sqs:
arn:
Fn::GetAtt:
- MyFifthQueue
- Arn
resources:
Resources:
MyFourthQueue:
Type: AWS::SQS::Queue
Properties:
QueueName: MyFourthQueue
MyFifthQueue: # Support for Fifo queue creation starts from 3.1 only
Type: AWS::SQS::Queue
Properties:
QueueName: MyFifthQueue.fifo
FifoQueue: true
ContentBasedDeduplication: true
The configuration of aws.SQS
's client of the plugin is done by defining a custom: serverless-offline-sqs
object in your serverless.yml
with your specific configuration.
You could use ElasticMQ with the following configuration:
custom:
serverless-offline-sqs:
autoCreate: true # create queue if not exists
apiVersion: '2012-11-05'
endpoint: http://0.0.0.0:9324
region: eu-west-1
accessKeyId: root
secretAccessKey: root
skipCacheInvalidation: false
FAQs
Emulate AWS λ and SQS locally when developing your Serverless project
The npm package serverless-offline-sqs receives a total of 61,381 weekly downloads. As such, serverless-offline-sqs popularity was classified as popular.
We found that serverless-offline-sqs demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 24 open source maintainers collaborating on the project.
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