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A node.js binding to the illumos kstat interface. This allows one to read kernel statistics via the kstat framework. It is likely to work unmodified on Solaris too.
The kstat
module exports a single class, Reader
that has the following
methods:
Reader(): Takes an optional object specifying the kstats to read. This
object may have the following members:
class => optional string denoting class of kstat(s) to read
module => optional string denoting module of kstat(s) to read
name => optional string denoting name of kstat(s) to read
instance => optional integer denoting instance of kstat(s) to read
Together, these members form a specification of kstats to read.
read(): Returns an array of kstats that match the specification with
which the reader instance was constructed *and* an optional
specification passed to this function. Each element of the
array is an object that contains the following members:
class => string denoting class of kstat
module => string denoting module of kstat
name => string denoting name of kstat
instance => integer denoting instance of kstat
snaptime => nanoseconds since boot of this snapshot
data => an object containing the named kstat data itself
Here is a simple program that dumps the kstats of class mib2
:
var kstat = require('kstat');
var util = require('util');
var reader = new kstat.Reader({ 'class': 'mib2' } );
console.log(util.inspect(reader.read()));
Here is a the same program that reads only the mib2
class kstats from the
icmp
module:
var kstat = require('kstat');
var util = require('util');
var reader = new kstat.Reader({ 'class': 'mib2', module: 'icmp' } );
console.log(util.inspect(reader.read()));
Finally, here is a simple program that prints the number of ICMP datagrams received per second:
var kstat = require('kstat');
var reader = new kstat.Reader({ 'class': 'mib2', module: 'icmp' } );
var data = [];
var gen = 0;
setInterval(function() {
data[gen] = reader.read()[0];
gen ^= 1;
if (!(data[0] && data[1]))
return;
console.log(data[gen ^ 1].data.inDatagrams - data[gen].data.inDatagrams);
}, 1000);
You can find further example programs in the examples directory.
MIT.
FAQs
illumos libkstat bindings
The npm package kstat receives a total of 4 weekly downloads. As such, kstat popularity was classified as not popular.
We found that kstat demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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