functions/Start-DbaSqlService.ps1

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function Start-DbaSqlService {
    <#
        .SYNOPSIS
            Starts SQL Server services on a computer.
 
        .DESCRIPTION
            Starts the SQL Server related services on one or more computers. Will follow SQL Server service dependencies.
 
            Requires Local Admin rights on destination computer(s).
 
        .PARAMETER ComputerName
            The SQL Server (or server in general) that you're connecting to. This command handles named instances.
 
        .PARAMETER InstanceName
            Only affects services that belong to the specific instances.
 
        .PARAMETER Credential
            Credential object used to connect to the computer as a different user.
 
        .PARAMETER Type
            Use -Type to collect only services of the desired SqlServiceType.
            Can be one of the following: "Agent","Browser","Engine","FullText","SSAS","SSIS","SSRS"
 
        .PARAMETER Timeout
            How long to wait for the start/stop request completion before moving on. Specify 0 to wait indefinitely.
 
        .PARAMETER InputObject
            A collection of services from Get-DbaSqlService
 
        .PARAMETER EnableException
            By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
            This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
            Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
        .PARAMETER WhatIf
            Shows what would happen if the cmdlet runs. The cmdlet is not run.
 
        .PARAMETER Confirm
            Prompts you for confirmation before running the cmdlet.
 
        .NOTES
            Tags: Service, SqlServer, Instance, Connect
            Author: Kirill Kravtsov( @nvarscar )
 
            Requires Local Admin rights on destination computer(s).
 
            dbatools PowerShell module (https://dbatools.io)
            Copyright (C) 2017 Chrissy LeMaire
            License: MIT https://opensource.org/licenses/MIT
 
        .LINK
            https://dbatools.io/Start-DbaSqlService
 
        .EXAMPLE
            Start-DbaSqlService -ComputerName sqlserver2014a
 
            Starts the SQL Server related services on computer sqlserver2014a.
 
        .EXAMPLE
            'sql1','sql2','sql3'| Get-DbaSqlService | Start-DbaSqlService
 
            Gets the SQL Server related services on computers sql1, sql2 and sql3 and starts them.
 
        .EXAMPLE
            Start-DbaSqlService -ComputerName sql1,sql2 -Instance MSSQLSERVER
 
            Starts the SQL Server services related to the default instance MSSQLSERVER on computers sql1 and sql2.
 
        .EXAMPLE
            Start-DbaSqlService -ComputerName $MyServers -Type SSRS
 
            Starts the SQL Server related services of type "SSRS" (Reporting Services) on computers in the variable MyServers.
    #>

    [CmdletBinding(DefaultParameterSetName = "Server", SupportsShouldProcess = $true)]
    Param (
        [Parameter(ParameterSetName = "Server", Position = 1)]
        [Alias("cn", "host", "Server")]
        [DbaInstanceParameter[]]$ComputerName = $env:COMPUTERNAME,
        [Alias("Instance")]
        [string[]]$InstanceName,
        [ValidateSet("Agent", "Browser", "Engine", "FullText", "SSAS", "SSIS", "SSRS")]
        [string[]]$Type,
        [parameter(ValueFromPipeline = $true, Mandatory = $true, ParameterSetName = "Service")]
        [Alias("ServiceCollection")]
        [object[]]$InputObject,
        [int]$Timeout = 30,
        [PSCredential]$Credential,
        [Alias('Silent')]
        [switch]$EnableException
    )
    begin {
        $processArray = @()
        if ($PsCmdlet.ParameterSetName -eq "Server") {
            $serviceParams = @{ ComputerName = $ComputerName }
            if ($InstanceName) { $serviceParams.InstanceName = $InstanceName }
            if ($Type) { $serviceParams.Type = $Type }
            if ($Credential) { $serviceParams.Credential = $Credential }
            if ($EnableException) { $serviceParams.Silent = $EnableException }
            $InputObject = Get-DbaSqlService @serviceParams
        }
    }
    process {
        #Get all the objects from the pipeline before proceeding
        $processArray += $InputObject
    }
    end {
        $processArray = $processArray | Where-Object { (!$InstanceName -or $_.InstanceName -in $InstanceName) -and (!$Type -or $_.ServiceType -in $Type) }
        if ($processArray) {
            Update-ServiceStatus -InputObject $processArray -Action 'start' -Timeout $Timeout -EnableException $EnableException
        }
        else { Stop-Function -EnableException $EnableException -Message "No SQL Server services found with current parameters." -Category ObjectNotFound }
    }
}