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health

Resource status monitoring library.

  • 0.0.2
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  • npm
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Health is a resource status monitoring library.

This is handy when you want to monitor the status of multiple resources using a simple configuration file. For example, if your application requires a web service and a MongoDB database to be available, Health module can monitor those resources and return status ok/fail against each resource along with the response time.

It also supports result caching via ttl attribe of each resource, which is handy when you want to monitor multiple resources at a different interval or to reduce the load on certain resources.

Installation

npm install -g health 

Usage

var health = new (require('health'))(
  setup: [
    { name: 'google', uri: 'http://google.com' },
    { name: 'gmail', uri: 'https://mail.google.com' }
  ]
);

Configuration

Health setup is just a simple JSON:

[
  { "name": "google", "uri", "http://google.com", "statusCodes": [ 200 ] },
  { "name": "gmail", "uri", "https://mail.google.com", "timeout": "1000" },
  { "name": "mongodb", "uri": "mongodb://somehost:27017", "timeout": 200, "ttl": 30000 }
]
AttributeTypeDescriptionCheckerUsageDefaultExample
uristringResource URI to checkAllMandatorymongodb://somehost:27017
namestringResource nameAllOptionalsomeapp
ttlnumberCache time to live in millisecondsAllOptional30000
timeoutnumberRequest/connect timeout in millisecondshttp, https, mongodbOptional500
statusCodesarrayAn array of acceptable response HTTP status codes, any match means status OKhttp, httpsOptional[ 200, '3xx', 409 ]
textsarrayAn array of all texts that must exist in response body, any of them does not exist means status FAILhttp, httpsOptional[ 'foo', 'bar' ]

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Package last updated on 01 May 2013

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