Bosun Scollector: External Collectors Sample collector written in PowerShell

Example

#Example of a PowerShell external collector. See http://bosun.org/scollector/external-collectors for details
#This file should be saved in C:\Program Files\scollector\collectors\0\mymetrics.ps1 since it is a continuous output script
#scollector.toml should have ColDir = 'C:\Program Files\scollector\collectors'

#Setup format strings and other variables
$epoch = New-Object DateTime (1970,1,1)
$MetricMetadata='{{"metric":"{0}","name":"{1}","value":"{2}"}}'
$MetricData='{{"metric":"{0}","timestamp":{1:F0},"value":{2:G}{3}}}'
$MetricTags=',"tags":{{{0}}}'
$Base="mymetric"

#Send metadata for each metric once on startup (Scollector will resend to Bosun periodically)
Write-Output ($MetricMetadata -f "$Base.test","rate","gauge") #See https://godoc.org/bosun.org/metadata#RateType
Write-Output ($MetricMetadata -f "$Base.test","unit","item")  #See https://godoc.org/bosun.org/metadata#Unit
Write-Output ($MetricMetadata -f "$Base.test","desc","A test metric")

#Create tags and send metrics
$tags=$MetricTags -f '"mykey":"myvalue"' #generate static tags here. Can append additional tags in the loop if needed. 
#Use $tags="" to exclude all tags but those added by Scollector.
Write-Output ($MetricData -f "$Base.test",[datetime]::UtcNow.Subtract($epoch).TotalSeconds,42.123,$tags)
do {
    $delay = Get-Random -Minimum 5 -Maximum 25
    sleep -Seconds $delay
    Write-Output ($MetricData -f "$Base.test",[datetime]::UtcNow.Subtract($epoch).TotalSeconds,$delay,$tags)
} while ($true)

#If a continuous output script ever exits scollector will restart it. If you just want periodic data every 60 seconds you 
#can use a /60/ folder instead of /0/ and allow the script to exit when finished sending a batch of metrics.