CODEWITHSUNDEEP
node.jsamazon-web-servicesamazon-ec2
BelgoCanadian
BelgoCanadian

Reputation: 934

NodeJs - Detect whether app is on AWS or local

Is there a way in NodeJs to detect whether it's currently running on an EC2 instance or whether it's being run locally? I have some functionality that changes based on where it's deployed. I can detect the IP address but I want something more dynamic, not tied to specific server configurations.

Upvotes: 3

Views: 1231

Answers (2)

user31782
user31782

Reputation: 7589

You could try checking for env variables, e.g.

if(process.env.PARTITION) {...}
if(process.env.NODE_ENV) {...}
if(process.env.PROJECT_ID) {...}

Or you can check if .env file exist, because this should be in your .gitignore and only be present on your ocal environment.

Upvotes: 0

Balu Vyamajala
Balu Vyamajala

Reputation: 10333

We could hit EC2 Metadata endpoint to determine EC2 instance or not.

This curl woks only within an EC2 instance

curl http://169.254.169.254/latest/meta-data/

Library node-ec2-metadata exposes an easy to use method which calls this metadata service behind the scenes.

var metadata = require("node-ec2-metadata");

metadata.isEC2().then(function (onEC2) {
  console.log("Running on EC2? " + onEC2);
});

Point to keep in mind, straight from the docs(since they hit the HEAD url and timeout after 500ms):

The initial call may take up to 500ms on a non-EC2 host, but the result is cached so subsequent calls provide a result immediately

Upvotes: 5

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