spm-agent-nodejs

spm-agent-nodejs

This is the Node.js monitoring agent for SPM performance monitoring from Sematext.

The following information is collected and transmitted to SPM (Cloud or On-Premises version):

• OS Metrics (CPU / Mem)
• Process Memory
• EventLoop stats
• Garbage Collector stats
• Web server stats (requests, error rate, response times etc.) Working for all web servers frameworks that use Node.js http/https module including
  • "connect" based frameworks
  • Express.js,
  • Sails.js
  • Hapi.js
  • Restify
  • and others ...

The module is able to run in cluster mode (master/worker).

Status

Supported Node-Versions: Node >= 0.10, 0.12, 4.x, 5.x, 6.x

Please check our blog for more information or contact us at [e-mail].

Installation

• How to Add Performance Monitoring to Node.js Applications

    npm install spm-agent-nodejs

Get a free account and create a Node.js API token at sematext.com/spm

Configuration

We use https://www.npmjs.com/package/rc for configuration. This means config parameters can be passed via several config locations commandline args or ENV variables. We recommend to use a file in current directory in INI or JSON format called ".spmagentrc". This file can be generated by providing setting and environment variable and calling a helper script:

    export SPM_TOKEN=YOUR-SPM-TOKEN
    node ./node_modules/spm-agent-nodejs/bin/spmconfig.js

The command above generates following default configuration file:

    # Directory for buffered metrics
    dbDir = ./spmdb

    # Application Token for SPM
    [tokens]
      spm = YOUR-SPM-TOKEN

    [logger]
      # log file directory default is ./spmlogs
      dir = ./spmlogs
      # silent = true means no creation of log files
      silent = false
      # log level for output - debug, info, error, defaults to error to be quiet
      level = error

The only required setting is the SPM Application Token, this could be set via config file ".spmagentrc" or environment variable:

export spmagent_tokens__spm=YOUR-SPM-APP-TOKEN

Please note the use of double "_" for nested properties

Usage

Node Version 0.10 and 0.12

Add this line at the begin of your source code / main script / app.js

    var spmAgent = require ('spm-agent-nodejs')

Node Version > 4.x

There is an alternative using latest 4.x and 5.x releases. It supports a command line option "-r" to preload node modules before the actual application is started. In this case the original source code needs no modification:

  node -r './spm-agent-nodejs' yourApp.js

Results

• Top Node.js Metrics to Watch

Troubleshooting

Please visit our WIKI for more information

Other SPM related packages

Please check out spm-metrics-js to monitor any custom metric in your application.

sematext-agent-docker, aka Sematext Agent for Docker

LICENCE

Apache 2 - see LICENSE file.