Skip to content

aws-node-scheduled-weather

Directory actions

More options

Directory actions

More options

Latest commit

 

History

History
 
 

aws-node-scheduled-weather

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
lib
lib
 
 
.gitignore
.gitignore
 
 
README.md
README.md
 
 
handler.js
handler.js
 
 
package.json
package.json
 
 
serverless.yml
serverless.yml
 
 

README.md

AWS Node Scheduled Weather Example

This is an example of creating a function that runs as a cron job using the serverless schedule event. It retrieves weather information at 10am (UTC) and emails it to a predefined recipient. For more information on schedule event check out the Serverless docs on schedule.

Cron syntax

cron(Minutes Hours Day-of-month Month Day-of-week Year)

All fields are required and time zone is UTC only.

Field Values Wildcards
Minutes 0-59 , - * /
Hours 0-23 , - * /
Day-of-month 1-31 , - * ? / L W
Month 1-12 or JAN-DEC , - * /
Day-of-week 1-7 or SUN-SAT , - * ? / L #
Year 192199 , - * /

Read the AWS cron expression syntax docs for more info on how to setup cron

Setup

DarkSky

Please visit https://darksky.net/dev/ to register for a free API token.

Postmark

Please visit https://postmarkapp.com to register for a free Postmark account.

Configuration

Upon setting up access to both external services, you'll be required to update the environment variables in serverless.yml:

environment:
  RECIPIENT: [email protected]
  DARK_SKY_API_KEY: abc123
  POSTMARK_API_KEY: abc123
  POSTMARK_SENDER: [email protected]
  LATITUDE: 40.702637
  LONGITUDE: -73.989406

Deploy

In order to deploy the you endpoint simply run

serverless deploy

The expected result should be similar to:

Serverless: Packaging service...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading service .zip file to S3 (1.87 MB)...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
...........
Serverless: Stack update finished...
Serverless: Removing old service versions...
Service Information
service: scheduled-weather-example
stage: dev
region: us-east-1
api keys:
  None
endpoints:
  None
functions:
  scheduled-weather-example-dev-weather: arn:aws:lambda:us-east-1:219106525755:function:scheduled-weather-example-dev-weather

There is no additional step required. Your defined schedule becomes active right away after deployment.

Usage

To test your function remotely:

sls invoke -f weather

The expected result should be similar to:

{
  "success": true
}

Additonal Resources

For more information on running cron with Serverless check out the Tutorial: Serverless Scheduled Tasks by Parallax.