Prometheus Collector for Node Application Metrics

A Collector that collects data using 'appmetrics' and exposes it to a path "/metrics".

Getting Started

Installation

The appmetrics-prometheus-client Collector for Node Application Metrics can be installed via npm:

$ npm install appmetrics-prometheus-client

Configuring the appmetrics-prometheus-client for Node Application Metrics

The Collector can be used in your application by requiring it as the first line of your application:

const appmetrics_prometheus = require('appmetrics-prometheus-client').Prometheus();

Data Provided

The Collector sends the following data values to Path /metrics from Node Application Metrics:

CPU

Gauges

• cpu.process the CPU usage of the application as a percentage of total machine CPU
• cpu.system the CPU usage of the system as a percentage of total machine CPU

System Memory

Gauges

• memory.process.private the amount of memory used by the Node.js application that cannot be shared with other processes, in bytes.
• memory.process.physical the amount of RAM used by the Node.js application in bytes.
• memory.process.virtual the memory address space used by Node.js application in bytes.
• memory.system.used the total amount of RAM in use on the system in bytes.
• memory.system.total the total amount of RAM available on the system in bytes.

Event Loop

• eventloop.latency.min the shortest sampled latency for processing an event
• eventloop.latency.max the longest sampled latency for processing an event
• eventloop.latency.avg the mean sampled latency for processing an event

Garbage Collection

Gauges

• gc.size the size of the JavaScript heap in bytes.
• gc.used the amount of memory used on the JavaScript heap in bytes.

Timers

• gc.duration the duration of the GC cycle in milliseconds.

HTTP Requests

Timers

• http the time taken for the HTTP request to be responded to in ms.

License

The Node Application Metrics to StatsD Collector is licensed using an Apache v2.0 License.

Version

0.0.3