[JAVA] Serverless Framework template to schedule start / stop EC2 on Lambda

This is the 16th day article of AWS Lambda Advent Calendar 2017.

Introduction

• Nowadays with containers, I haven't touched Lambda or Serverless Framework for a long time, but since the requirement to start EC2 at 8 o'clock and stop at 20:30 has emerged, I made it with sls quickly.
• The source is available on Github.
• The content is extremely simple, so I think it can be achieved in haste.

Setting up the environment

• Please refer to Previous article. https://qiita.com/ukitiyan/items/945d84282726d3fe2c2f

Deploy with Serverless Framework

Get source

• Get the source from the following Github.

$ git clone https://github.com/ukitiyan/operation-ec2-instance.git

Import to STS (Eclipse)

• Start STS and select the "operation-ec2-instance" folder you got from Github earlier in Project Explorer-> Right Click-> Maven-> Existing Maven Projects.

Modify serverless.yml + Build

• Modify the settings around L37 in serverless.yml as appropriate.
• rate: AWS Lambda --Schoned Event Cron Format and described in ʻUTC`
• instanceId: Describe the instanceId of the target instance
• Schedule can be increased vertically, so it can support multiple instances. (Based on that, instanceId is not specified in the environment variable)

serverless.yml

- schedule:
    rate: cron(30 11 * * ? *)
    input:
      goal: stop
      instanceId: i-XXXXXXXXXXXXXXXXX
- schedule:
    rate: cron(0 23 * * ? *)
    input:
      goal: start
      instanceId: i-XXXXXXXXXXXXXXXXX

• Right-click on the project-> Run As-> Maven Install to build.
• Operation-ec2-instance.1.0.0.jar will be created under target.

Deploy

• As in the example, the following command is one shot.

$ cd operation-ec2-instance
$ serverless deploy -v
Serverless: Packaging service...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
・
・
Serverless: Stack update finished...
Service Information
service: operation-ec2-instance
stage: prod
region: ap-northeast-1
api keys:
  None
endpoints:
  None
functions:
  aws-java-maven-prod-hello: arn:XXXXXXXX

• Do test from the console with the following Json, or wait until the set time is reached and make sure there is no problem.

{
  "goal": "stop",
  "instanceId": "i-XXXXXXXXXXXXXXXXX"
}

Summary

• Well, it's a defeat. I was able to realize haste.
• It's really nice for the app shop to complete with STS.