Checks the Qlik Sense site availability and reboots all services if proxy service is not accessible

site_availabity.ps1

$Today = Get-Date -UFormat "%Y%m%d %H%M"
$LogFile = "\\[LOG_DIRECTORY]\SiteCheck.txt"


# Drop all the restrictions on script execution
Set-ExecutionPolicy Unrestricted


# URL to check
$uri = "[SITE_URL]"  
$Result = @() 
   
# Capturing the time taken for the request to complete
$time = 
    try{ 
        $request = $null 
        
        # Request the URI, and measure how long the response took. 
        $result1 = Measure-Command { $request = Invoke-WebRequest -Uri $uri } 
        $result1.TotalMilliseconds 
        }  
    catch{ 
        # If the request generated an exception (i.e.: 500 server 
        # error or 404 not found), we can pull the status code from the 
        # Exception.Response property

        $request = $_.Exception.Response 
        $time = -1 
        }   

# Adding all the properties to result object
$result += [PSCustomObject] @{ 
    Time = Get-Date; 
    Uri = $uri; 
    StatusCode = [int] $request.StatusCode; 
    StatusDescription = $request.StatusDescription; 
    ResponseLength = $request.RawContentLength; 
    TimeTaken =  $time;  
    } 
 
 
# Checking the status code to determine if the site is reachable with no issues. (code 200),
# If there are any issues (anything apart from code 200) which will result in services being
# restarted.
if($result -ne $null) 
{   # For future, this will allow us to loop mutiple URLs and create one result set and loop 
    # through it. 
    Foreach($Entry in $Result) 
    { 
        # When its not reachable
        if($Entry.StatusCode -ne "200") 
        { 
            write-Output "$Today - Site is not reachable - $Entry" | out-file $LogFile -Append
            write-Output "$Today - Stoping Qlik Services......" | out-file $LogFile -Append
                     
            stop-service QlikSenseProxyService -Force -WarningAction SilentlyContinue
            stop-service QlikSenseEngineService -Force -WarningAction SilentlyContinue
            stop-service QlikSenseSchedulerService -Force -WarningAction SilentlyContinue
            stop-service QlikSensePrintingService -Force -WarningAction SilentlyContinue
            stop-service QlikSenseServiceDispatcher -Force -WarningAction SilentlyContinue
            stop-service QlikLoggingService -Force -WarningAction SilentlyContinue
            stop-service QlikSenseRepositoryService -Force -WarningAction SilentlyContinue
            stop-service QlikSenseRepositoryDatabase -Force -WarningAction SilentlyContinue

            sleep 10

            write-Output "$Today - Starting Qlik Services......" | out-file $LogFile -Append

            start-service QlikLoggingService -WarningAction SilentlyContinue
            start-service QlikSenseRepositoryDatabase -WarningAction SilentlyContinue
            start-service QlikSenseRepositoryService -WarningAction SilentlyContinue
            start-service QlikSenseEngineService -WarningAction SilentlyContinue
            start-service QlikSenseSchedulerService -WarningAction SilentlyContinue
            start-service QlikSensePrintingService -WarningAction SilentlyContinue
            start-service QlikSenseServiceDispatcher -WarningAction SilentlyContinue
            start-service QlikSenseProxyService -WarningAction SilentlyContinue

            sleep 10

            write-Output "$Today - Checking Qlik Services......" | out-file $LogFile -Append
            
            # Calling a custom function with service name to check if they have started ok. If they 
            # havent, the function below will aim to restart it.
            CheckService QlikSenseRepositoryDatabase "$LogFile" "$Today"
            CheckService QlikSenseRepositoryService "$LogFile" "$Today"
            CheckService QlikSenseEngineService "$LogFile" "$Today"
            CheckService QlikSenseSchedulerService "$LogFile" "$Today"
            CheckService QlikSensePrintingService "$LogFile" "$Today"
            CheckService QlikSenseServiceDispatcher "$LogFile" "$Today"
            CheckService QlikSenseProxyService "$LogFile" "$Today"
            CheckService QlikLoggingService "$LogFile" "$Today"

        } 
        else 
        { 
            write-Output "$Today - Site is reachable - :$Entry" | out-file $LogFile -Append
        } 
    } 
}

write-Output "$Today - Completed Check" | out-file $LogFile -Append

#Custom function to see if the service is running, if not, restart it.
function CheckService
{
    param($ServiceName,$LogFile,$Today)

    $arrService = get-service -Name $ServiceName
    if ($arrService.Status -ne "Running")
    {
        start-service $ServiceName -WarningAction SilentlyContinue
        write-output "$Today - Starting " $ServiceName "..." | out-file $LogFile -Append
        sleep 10
        $result = if (($_ | get-service).Status -eq "Running") {"success"} else {"failure"}
        write-output "$Today - Service $($_.Name) has been restarted with $result." | out-file $LogFile -Append
    }
    if ($arrService.Status -eq "running")
    { 
        write-output "$Today - $ServiceName service has already started" | out-file $LogFile -Append
    }
}