functions/Get-DbaUptime.ps1

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function Get-DbaUptime
{
<#
.SYNOPSIS
Returns the uptime of the SQL Server instance, and if required the hosting windows server
  
.DESCRIPTION
By default, this command returns for each SQL Server instance passed in:
SQL Instance last startup time, Uptime as a PS TimeSpan, Uptime as a formatted string
Hosting Windows server last startup time, Uptime as a PS TimeSpan, Uptime as a formatted string
  
.PARAMETER SqlServer
The SQL Server that you're connecting to.
 
.PARAMETER SqlCredential
Credential object used to connect to the SQL Server as a different user
 
.PARAMETER WindowsCredential
Credential object used to connect to the SQL Server as a different user
 
.PARAMETER SqlOnly
Excludes the Windows server information
 
.PARAMETER WindowsOnly
Excludes the SQL server information
 
.NOTES
Tags: CIM
Original Author: Stuart Moore (@napalmgram), stuart-moore.com
  
dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com)
Copyright (C) 2016 Chrissy LeMaire
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>
 
.LINK
https://dbatools.io/Get-DbaUptime
 
.EXAMPLE
Get-DbaUptime -SqlServer SqlBox1\Instance2
 
Returns an object with SQL Server start time, uptime as TimeSpan object, uptime as a string, and Windows host boot time, host uptime as TimeSpan objects and host uptime as a string for the sqlexpress instance on winserver
 
.EXAMPLE
Get-DbaUptime -SqlServer winserver\sqlexpress, sql2016
 
Returns an object with SQL Server start time, uptime as TimeSpan object, uptime as a string, and Windows host boot time, host uptime as TimeSpan objects and host uptime as a string for the sqlexpress instance on host winserver and the default instance on host sql2016
  
.EXAMPLE
Get-DbaUptime -SqlServer sqlserver2014a, sql2016 -SqlOnly
 
Returns an object with SQL Server start time, uptime as TimeSpan object, uptime as a string for the sqlexpress instance on host winserver and the default instance on host sql2016
 
.EXAMPLE
Get-SqlRegisteredServerName -SqlServer sql2014 | Get-DbaUptime
 
Returns an object with SQL Server start time, uptime as TimeSpan object, uptime as a string, and Windows host boot time, host uptime as TimeSpan objects and host uptime as a string for every server listed in the Central Management Server on sql2014
  
#>

[CmdletBinding(DefaultParameterSetName = "Default")]
Param (
[parameter(Mandatory = $true, ValueFromPipeline = $true)]
[Alias("ServerInstance", "SqlInstance", "ComputerName")]
[object[]]$SqlServer,
[parameter(ParameterSetName = "Sql")]
[Switch]$SqlOnly,
[parameter(ParameterSetName = "Windows")]
[Switch]$WindowsOnly,
[Alias("Credential")]
[PsCredential]$SqlCredential,
[PsCredential]$WindowsCredential
)

PROCESS
{
foreach ($instance in $SqlServer)
{
if ($instance.Gettype().FullName -eq [System.Management.Automation.PSCustomObject] )
{
$servername = $instance.SqlInstance
}
elseif ($instance.Gettype().FullName -eq [Microsoft.SqlServer.Management.Smo.Server])
{
$servername = $instance.NetName
}
else
{
$servername = $instance
}

if ($WindowsOnly -ne $true)
{

Write-Verbose "Connecting to $servername"
try
{
$server = Connect-SqlServer -SqlServer $servername -SqlCredential $SqlCredential -ErrorVariable ConnectError

}
catch
{
Write-Warning $_
continue
}

Write-Verbose "Getting Start times for $servername"
#Get TempDB creation date
$SQLStartTime = $server.Databases["TempDB"].CreateDate
$SQLUptime = New-TimeSpan -Start $SQLStartTime -End (Get-Date)
$SQLUptimeString = "{0} days {1} hours {2} minutes {3} seconds" -f $($SQLUptime.Days), $($SQLUptime.Hours), $($SQLUptime.Minutes), $($SQLUptime.Seconds)
}

if ($SqlOnly -ne $true)
{
$WindowsServerName = (Resolve-DbaNetworkName $servername -Credential $WindowsCredential).ComputerName

try
{
Write-Verbose "Getting WinBootTime via CimInstance for $servername"
$WinBootTime = (Get-CimInstance -ClassName win32_operatingsystem -ComputerName $windowsServerName -ErrorAction SilentlyContinue).lastbootuptime
$WindowsUptime = New-TimeSpan -start $WinBootTime -end (get-date)
$WindowsUptimeString = "{0} days {1} hours {2} minutes {3} seconds" -f $($WindowsUptime.Days), $($WindowsUptime.Hours), $($WindowsUptime.Minutes), $($WindowsUptime.Seconds)

}
catch
{
try
{
Write-Verbose "$functionname - Getting WinBootTime via CimInstance DCOM"
$CimOption = New-CimSessionOption -Protocol DCOM
$CimSession = New-CimSession -Credential:$WindowsCredential -ComputerName $WindowsServerName -SessionOption $CimOption
$WinBootTime = ($CimSession | Get-CimInstance -ClassName Win32_OperatingSystem).LastBootUpTime
$WindowsUptime = New-TimeSpan -start $WinBootTime -end (get-date)
$WindowsUptimeString = "{0} days {1} hours {2} minutes {3} seconds" -f $($WindowsUptime.Days), $($WindowsUptime.Hours), $($WindowsUptime.Minutes), $($WindowsUptime.Seconds)

}
catch
{
Write-Exception $_
}
}

if ($null -eq $WinBootTime)
{
#Skip the windows results as they'll either be garbage or not there.
$SqlOnly = $true
}
}

if ($SqlOnly -eq $true)
{
[PSCustomObject]@{
ComputerName = $server.NetName
InstanceName = $server.ServiceName
SqlServer = $server.Name
SqlUptime = $SQLUptime
SqlStartTime = $SQLStartTime
SinceSqlStart = $SQLUptimeString
}
}
elseif ($WindowsOnly -eq $true)
{
[PSCustomObject]@{
ComputerName = $WindowsServerName
WindowsUptime = $WindowsUptime
WindowsBootTime = $WinBootTime
SinceWindowsBoot = $WindowsUptimeString
}
}
else
{
[PSCustomObject]@{
ComputerName = $WindowsServerName
InstanceName = $server.ServiceName
SqlServer = $server.Name
SqlUptime = $SQLUptime
WindowsUptime = $WindowsUptime
SqlStartTime = $SQLStartTime
WindowsBootTime = $WinBootTime
SinceSqlStart  = $SQLUptimeString
SinceWindowsBoot = $WindowsUptimeString
}
}
}
}
}