https://github.com/leventebalogh/playground-nodejs-loki-grafana

A simple playground for sending logs easily into Loki from Node.js without the need for Promtail.
https://github.com/leventebalogh/playground-nodejs-loki-grafana

Last synced: about 6 hours ago
JSON representation

A simple playground for sending logs easily into Loki from Node.js without the need for Promtail.

• Host: GitHub
• URL: https://github.com/leventebalogh/playground-nodejs-loki-grafana
• Owner: leventebalogh
• Created: 2020-12-16T17:58:25.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-13T21:40:21.000Z (almost 2 years ago)
• Last Synced: 2024-04-08T17:05:30.782Z (7 months ago)
• Language: JavaScript
• Homepage:
• Size: 580 KB
• Stars: 17
• Watchers: 2
• Forks: 1
• Open Issues: 8
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# Node.js + Loki + Grafana

This is a simple playground for sending random logs from a Node.js service to Loki and then querying

them using Grafana.

```

 Node.JS      (:8080)        Loki         (:3100)       Grafana        (:3000)

+-------------------+       +-------------------+      +---------------------+

|                   |       |                   |      |                     |

|   Sends logs      |       |                   |      |  Query with         |

|   using Winston   |------->                   <------|  LogQL              |

|                   |       |                   |      |                     |

|                   |       |                   |      |                     |

+-------------------+       +-------------------+      +---------------------+

```

![Screenshot](./assets/screenshot.png "Screenshot")

---

## How are the logs sent?

The logs are sent using [winston-loki](https://github.com/JaniAnttonen/winston-loki) which exposes a transform that pushes them directy to the `/loki/api/v1/push` API endpoint of Loki.

---

## Start

```bash

# Starts the following services:

# - Node.js - http://localhost:8080 

# - Loki - http://localhost:3100 

# - Grafana - http://localhost:3000 

$ docker-compose up

```

Visit [http://localhost:3000/explore](http://localhost:3000/explore) for playing around with the metrics.

(The service is scraped for random metrics every 1s for more frequent data)

---

## Development

```bash

# Starts the Node.js service and restarts it on changes

$ yarn dev

# Starts Loki and Grafana

$ docker-compose up loki grafana