{"id":6285,"date":"2018-12-13T11:08:36","date_gmt":"2018-12-13T16:08:36","guid":{"rendered":"https:\/\/jdhitsolutions.com\/blog\/?p=6285"},"modified":"2018-12-13T11:08:43","modified_gmt":"2018-12-13T16:08:43","slug":"more-powershell-monitoring-prompts","status":"publish","type":"post","link":"https:\/\/jdhitsolutions.com\/blog\/powershell\/6285\/more-powershell-monitoring-prompts\/","title":{"rendered":"More PowerShell Monitoring Prompts"},"content":{"rendered":"

Wow. Do you all love PowerShell prompts or what? My prompt to display up\/down information<\/a> was very popular. How about a few more? As I mentioned in my previous post, performance is super critical when it comes to a PowerShell prompt function. I've experimented with a number of different techniques and I think using a runspace and synchronized hashtable is the best way to go. With that in mind here are a few more PowerShell prompt functions.<\/p>\n

<\/p>\n

Show Free Space<\/h1>\n

First up is a prompt that displays the percent of free disk space for the C: drive on one or more remote computers. I'm using Get-Volume<\/a> to retrieve this information.\u00a0 In my previous function, I had the computer names hard-coded. In this version, I put them in a text file in my Scripts folder. In the Do loop, I get the list, filtering out blank lines and trimming up spaces.<\/p>\n

$computers = Get-Content -Path c:\\scripts\\watch.txt | where-object {$_ -match $_} |\nforeach-object {$_.trim()}\n$results = $computers | ForEach-Object {\ntry {\n    $c = Get-Volume -DriveLetter c -CimSession $_ -ErrorAction Stop |\n        Add-Member -MemberType ScriptProperty -Name PctFree -Value {($($this.SizeRemaining) \/ $($this.size)) * 100 -as [int]} -Force -passthru\n    $val = $c.PctFree\n}\nCatch {\n    $val = '??'\n}\n<\/pre>\n
Now I can dynamically change the prompt by modifying the text file. When the prompt is first loaded, the hashtable doesn't have values so I display 'working'. Once there is data the prompt reflects the percent free space.<\/p>\n
\"server<\/a><\/p>\n
Because I'm assuming disk space doesn't change rapidly, the loop in the runspace only runs once a minute.\u00a0 As with my other prompt functions, this code is on GitHub<\/a>.<\/p>\n