Nodejs Logging Docker Container

Nodejs app that has an API to handle metric logs. To see the live DEMO, please go to the section 4.2.1 under this document.

1. API Methods

The API has two methods

1.1 POST

URL: /metric/{key}

Body:

{
  "value": 400
}

Response:

{}

This endpoint stores a value for the corresponding metric.

1.2 GET

URL: /metric/{key}/sum

Response:

{
  "value": 400
}

This endpoint retrieves the last hour aggregated sum for the corresponding key.

Important:

Whenever you try to get the sum from a metric that hasn't been logged yet, the API will return 0.

2. API Response Status

If everything works successfully, the API returns a HTTP Status 200

If any of the parameters is incorrect, the API returns a HTTP Status 400

If something wrong happen at the server, the API returns a HTTP Status 500

If you make a request using an unsupported HTTP method, the API returns a HTTP Status 405.

3. Tech Stack Used

This example uses Nodejs, Typescript, Express and Docker.

4. Execute it

There are two ways of executing the project.

• Microservice way
• Lambda way

For the sake of demonstration, I added an additional layer that allows you to deploy the code as a lambda function using Netlify, but you can run it as a Docker container as well.

4.1 Microservice

In order to run this project locally, you need the following technologies/tools installed.

• Docker

• Docker Compose

• Make (Optional): This is installed by default in Linux and MacOS.

Execute the following commands at the project's root folder.

1. Run it using Make.

$ make start

OR

2. Run it using docker-compose command.

$ docker-compose up -d

4.2 Lambda

In order to deploy this lambda to Netlify, you must execute the following command

$ netlify deploy

Follow the instructions to connect it to your Netlify's account.

4.2.1 Test Live Demo

Try executing this on your terminal:

curl \
  --header "Content-Type: application/json" \
  --request POST \
  --data '{"value":"20"}' \
  https://node-logging.netlify.app/.netlify/functions/lambda/test

Verify it at the live DEMO