Obs/bin/TestObservability/TestModules/TestWatchdog/TestWatchdog.psm1

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# #
# Copyright (C) Microsoft Corporation. All rights reserved. #
# #
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using Module ..\..\HelperFiles\Result.psm1 # Used for [Result]::PASS and [Result]::FAIL
Import-Module $PSScriptRoot\..\..\HelperFiles\TestObsHelper.psm1 -Force # Used for Trace-Progress function
Import-Module $PSScriptRoot\WatchdogTestRow.psm1 -Force

function Test-Watchdog
{
    Param(
        [Parameter(Mandatory=$true)]
        [PSCustomObject]
        $TestReport,

        [Parameter(Mandatory=$true)]
        [string]
        $DeviceType,

        [Parameter(Mandatory=$false)]
        [switch]
        $Repair,

        [Parameter(Mandatory=$false)]
        [string]
        $PathToTestReports
     )

    try
    {
        $functionName = $($MyInvocation.MyCommand.Name)

        if ($Repair)
        {
            Trace-Progress "$functionName : Running repair steps before running tests."
            [string]$repairResults = Run-Repair
            # Give 100 seconds for watchdog status file to update
            Trace-Progress "$functionName : Waiting 100 seconds for watchdog status file to update."
            Start-Sleep -Seconds 100
            $testReport = Run-AllTests -TestReport $TestReport -RepairResults $repairResults -Repair
        }
        else
        {
            $testReport = Run-AllTests -TestReport $TestReport
        }
        
        return $TestReport
    }
    catch
    {
        Trace-Progress "$functionName : Failed with $_" -Error
        return $TestReport
    }
}

function Run-AllTests
{
    Param(
        [Parameter(Mandatory=$true)]
        [PSCustomObject]
        $TestReport,

        [Parameter(Mandatory=$false)]
        [string]
        $RepairResults,

        [Parameter(Mandatory=$false)]
        [switch]
        $Repair
    )

    Trace-Progress "$functionName : Getting status of watchdog"
    $testRow = Get-WatchDogStatus -Repair:$Repair
    $TestReport.Rows.Add($testRow)

    Trace-Progress "$functionName : Getting status of FDA"
    $testRow = Get-FDAStatus -Repair:$Repair
    $testReport.Rows.Add($testRow)

    Trace-Progress "$functionName : Getting status of MonAgentHost"
    $testRow = Get-MonAgentHostStatus -Repair:$Repair
    $testReport.Rows.Add($testRow)

    Trace-Progress "$functionName : Getting status of Observability Agent"
    $testRow = Get-ObservabilityAgentStatus -Repair:$Repair
    $testReport.Rows.Add($testRow)

    if ($Repair)
    {
        foreach ($row in $testReport.Rows)
        {
            $row | Add-Member -Type "NoteProperty" -Name "RepairResults" -Value $RepairResults
        }
    }
    
    return $testReport
}

#### Main Test Functions #####


function Get-WatchDogStatus
{
    Param(
        [Parameter(Mandatory=$false)]
        [switch]
        $Repair
     )

    $functionName = $($MyInvocation.MyCommand.Name)
    $testName = "Get status of Watchdog"
    
    try
    {
        if ($Repair)
        {
            $repairActionRan = "Yes"
        }
        else
        {
            $repairActionRan = "No"
        }
        $testRow = New-WatchdogTestRow -TestName $testName -RepairActionRan $repairActionRan
        $service = Get-Service "WatchdogAgent"
        if ($service.Status -ieq "Running")
        {
            $testRow.Result = [Result]::PASS
        }
        else
        {
            $testRow.Result = [Result]::FAIL 
            $testRow.ReasonForFailure = "The watchdog agent does not have status 'running'. It has status $($service.Status)"
        }
        return $testRow
    }
    catch
    {
        $failureMessage = "$functionName : failed with $_"
        Trace-Progress $failureMessage -Error
        return Update-WatchdogTestRowForError -TestRow $testRow -FailureMessage $failureMessage `
            -TestName $testName
    }
}

function Get-FDAStatus
{
    Param(
        [Parameter(Mandatory=$false)]
        [switch]
        $Repair
     )

    $functionName = $($MyInvocation.MyCommand.Name)
    try
    {
        if ($Repair)
        {
            $repairActionRan = "Yes"
        }
        else
        {
            $repairActionRan = "No"
        }
        $testName = "Get status of FDA"
        $testRow = New-WatchdogTestRow -TestName $testName -RepairActionRan $repairActionRan
        try
        {
            $watchdogStatusJSON = Read-WatchdogStatusJSON
        }
        catch
        {
            Trace-Progress "$functionName Error is $_" -Error
        }
        if ($null -eq $watchdogStatusJSON)
        {
            $testRow.Result = [Result]::FAIL
            $testRow.ReasonForFailure = "Can't get data from Wachdogstatus JSON file. Error is $_"
            return $testRow
        }
        $message = $watchdogStatusJSON.Heartbeat.FormattedMessage.Message
        $testRow.AdditionalInformation = "The watchdog status message is $message"
        $regex = "^.*FleetDiagnosticsAgent process is ([A-Za-z0-9_ ]+)\..*$"
        return Get-Status -TestRow $testRow -Message $message -Regex $regex -ProcessName "FleetDiagnosticsAgent"    
    }
    catch
    {
        $failureMessage = "$functionName : failed with $_"
        Trace-Progress $failureMessage -Error
        return Update-WatchdogTestRowForError -TestRow $testRow -FailureMessage $failureMessage `
            -TestName $testName
    }
}

function Get-MonAgentHostStatus
{
    Param(
        [Parameter(Mandatory=$false)]
        [switch]
        $Repair
     )

    $functionName = $($MyInvocation.MyCommand.Name)
    
    try
    {
        if ($Repair)
        {
            $repairActionRan = "Yes"
        }
        else
        {
            $repairActionRan = "No"
        }
        $testName = "Get status of MonAgentHost"
        $testRow = New-WatchdogTestRow -TestName $testName -RepairActionRan $repairActionRan
        try
        {
            $watchdogStatusJSON = Read-WatchdogStatusJSON
        }
        catch
        {
            Trace-Progress "$functionName Error is $_" -Error
        }
        if ($null -eq $watchdogStatusJSON)
        {
            $testRow.Result = [Result]::FAIL
            $testRow.ReasonForFailure = "Can't get data from Wachdogstatus JSON file. Error is $_"
            return $testRow
        }
        $watchdogStatusJSON = Read-WatchdogStatusJSON
        $message = $watchdogStatusJSON.Heartbeat.FormattedMessage.Message
        $testRow.AdditionalInformation = "The watchdog status message is $message"
        $regex = "^.*MonAgentHost process is ([A-Za-z0-9_ ]+)\..*$"
        return Get-Status -TestRow $testRow -Message $message -Regex $regex -ProcessName "MonAgentHost"
    }
    catch
    {
        $failureMessage = "$functionName : failed with $_"
        Trace-Progress $failureMessage -Error
        return Update-WatchdogTestRowForError -TestRow $testRow -FailureMessage $failureMessage `
            -TestName $testName

    }
}

function Get-ObservabilityAgentStatus
{
    Param(
        [Parameter(Mandatory=$false)]
        [switch]
        $Repair
     )

    $functionName = $($MyInvocation.MyCommand.Name)
    
    try
    {
        if ($Repair)
        {
            $repairActionRan = "Yes"
        }
        else
        {
            $repairActionRan = "No"
        }
        $testName = "Get status of ObservabilityAgent"
        $testRow = New-WatchdogTestRow -TestName $testName -RepairActionRan $repairActionRan
        try
        {
            $watchdogStatusJSON = Read-WatchdogStatusJSON
        }
        catch
        {
            Trace-Progress "$functionName Error is $_" -Error
        }
        if ($null -eq $watchdogStatusJSON)
        {
            $testRow.Result = [Result]::FAIL
            $testRow.ReasonForFailure = "Can't get data from Wachdogstatus JSON file. Error is $_"
            return $testRow
        }
        $watchdogStatusJSON = Read-WatchdogStatusJSON
        $message = $watchdogStatusJSON.Heartbeat.FormattedMessage.Message
        $testRow.AdditionalInformation = "The watchdog status message is $message"
        $regex = "^.*AzureStack Observability Agent service is ([A-Za-z0-9_ ]+)\..*$"
        return Get-Status -TestRow $testRow -Message $message -Regex $regex -ProcessName "ObservabilityAgent"
    }
    catch
    {
        $failureMessage = "$functionName : failed with $_"
        Trace-Progress $failureMessage -Error
        return Update-WatchdogTestRowForError -TestRow $testRow -FailureMessage $failureMessage `
            -TestName $testName
    }
}


#### Test Helper Functions #####
function Get-Status
{
    Param(
        [Parameter(Mandatory=$true)]
        [PSCustomObject]
        $TestRow,

        [Parameter(Mandatory=$true)]
        [string]
        $Message,

        [Parameter(Mandatory=$true)]
        [string]
        $Regex,

        [Parameter(Mandatory=$true)]
        [string]
        $ProcessName
     )

     if ($message -match $regex)
     {
        $status = $matches[1]
        if ($status -ieq "running")
        {
            $testRow.Result = [Result]::PASS
        }
        else
        {
            $testRow.Result = [Result]::FAIL 
            $testRow.ReasonForFailure = "The status of $ProcessName is not running. It is $status"
        }
     }
     else
     {
        $testRow.Result = [Result]::FAIL 
        $testRow.ReasonForFailure = "Could not get status of $ProcessName"
     } 

     return $testRow
}

function Read-WatchdogStatusJSON
{
    $pathToExtensionHelper = "$env:SystemDrive\Packages\Plugins\Microsoft.AzureStack.Observability.*TelemetryAndDiagnostics\*\scripts"
    $files = Get-ChildItem -Path $pathToExtensionHelper -recurse -filter "*ExtensionHelper.psm1"
    $extensionHelperFullName = $files[0].FullName
    Import-Module $extensionHelperFullName
    $watchdogStatusFile = Get-WatchdogStatusFile -LogFile "file.log"
    return Get-Content -path $watchdogStatusFile | ConvertFrom-JSON
}


#### Repair Functions #####
function Run-Repair
{
    $functionName = $($MyInvocation.MyCommand.Name)
    try
    {
        Restart-ServicesAndProcesses
        $repairSucces = Check-IfRepairWasSuccessful
        if ($repairSuccess)
        {
            return "Repair succeeded after restarting services"
        }
        else
        {
            # If repair wasn't sucessful. Try recreating the reg key.
            Restore-MAWatchdogRegKeyAndService | Out-Null
            $repairResultsDescription = "Repair did not succeed after restarting services. Next, tried recreating AllowTelemetry reg key. "
            $repairResultsDescription += "If you are still seeing errors, see ObservabilityLogmanTraces.etl at $env:SystemDrive\Observability\ObservabilityLogmanTraces for additional debugging."
            return $repairResultsDescription
        }
    }
    catch
    {
        Trace-Progess "$functionName failed with error $_"
    }
}

function Restart-ServicesAndProcesses
{
    $functionName = $($MyInvocation.MyCommand.Name)
    try
    {
        $watchdogStatus = Get-ServiceStatus "WatchdogAgent" -ErrorAction Continue
        if ($watchdogStatus -ne "Running")
        {
            Trace-Progress "$functionName : WatchdogAgent was not running. Attempting to restart service."
            Restart-Service -Name "WatchdogAgent" -ErrorAction Continue
            Start-Sleep -Seconds 10
        }
        $obsAgentStatus = Get-ServiceStatus "AzureStack Observability Agent" -ErrorAction Continue
        if ($obsAgentStatus -ne "Running")
        {
            Trace-Progress "$functionName : AzureStack ObservabilityAgent was not running. Attempting to restart service."
            Restart-Service -Name "AzureStack Observability Agent" -ErrorAction Continue
            Start-Sleep -Seconds 10
        }    
    }
    catch
    {
        Trace-Progress "$functionName : Failed with error $_"
    }
    
}

function Restore-MAWatchdogRegKeyAndService
{
    $functionName = $($MyInvocation.MyCommand.Name)
    $HCITelemetryRegKey = @{
        Path = 'HKLM:\SYSTEM\Software\Microsoft\MAWatchdogService\HCITelemetry'
        Name = 'AllowTelemetry'
        PropertyType = 'String'
        Value = 'True'
    }
    $regKey = $(Get-ItemProperty -Path $HCITelemetryRegKey.Path -Name $HCITelemetryRegKey.Name -ErrorAction SilentlyContinue)
    if($null -ne $regKey)
    {
       Trace-Progress "$functionName : Registry key $($HCITelemetryRegKey.Name) at $($HCITelemetryRegKey.Path) already exists. Noop."
    }
    else
    {
        Trace-Progress "$functionName : Registry key $($HCITelemetryRegKey.Name) at $($HCITelemetryRegKey.Path) does not exist. Restoring."
        $watchdogServiceName = "WatchdogAgent"
        if (-not (Test-Path -Path $HCITelemetryRegKey.Path))
        {
            New-Item -Path $HCITelemetryRegKey.Path -Force
        }
        New-ItemProperty `
            -Path $HCITelemetryRegKey.Path `
            -Name $HCITelemetryRegKey.Name `
            -PropertyType $HCITelemetryRegKey.PropertyType `
            -Value $HCITelemetryRegKey.Value `
            -Force | Out-Null

        Trace-Progress "$functionName : Created registry key $($HCITelemetryRegKey.Name) at $($HCITelemetryRegKey.Path) with value $($HCITelemetryRegKey.Value)."
        $watchdogAgent = Get-Service $watchdogServiceName -ErrorAction SilentlyContinue
        if($watchdogAgent)
        {
            Trace-Progress "$functionName : Restarting $watchdogServiceName windows service."
            $watchdogAgent | Restart-Service -ErrorAction SilentlyContinue
        }
    }
}

# Note: Check each servie and process individually instead of checking watchdog status file,
# because it takes a minute to update.
function Check-IfRepairWasSuccessful
{
    try
    {
        $repairSuccess    = $true
        $watchdogStatus = Get-ServiceStatus "WatchdogAgent" -ErrorAction Continue
        if ($watchdogStatus -ne "Running")
        {
            Trace-Progress "$functionName : Failed to restart watchdog agent."
            $repairSuccess = $false
        }
        $obsAgentStatus = Get-ServiceStatus "AzureStack Observability Agent" -ErrorAction Continue
        if ($obsAgentStatus -ne "Running")
        {
            Trace-Progress "$functionName : Failed to restart AzureStack Observability Agent."
            $repairSuccess = $false
        }
        $FDAProcess = Get-Process "FleetDiagnosticsAgent" -ErrorAction Continue
        if ($null -eq $FDAProcess)
        {
            Trace-Progress "$functionName : FDA process is not running."
            $repairSuccess = $false
        }
        $MonAgentHostProcess = Get-Process "MonAgentHost" -ErrorAction Continue
        if ($null -eq $MonAgentHostProcess)
        {
            Trace-Progress "$functionName : MonAgentHost process is not running."
            $repairSuccess = $false
        }
        return $repairSuccess    
    }
    catch
    {
        Trace-Progress "$functionName : Failed with error $_"
        return $false
    }
    
}

function Get-ServiceStatus
{
    Param(
        [Parameter(Mandatory=$false)]
        [string]
        $ServiceName
     )
     $service = Get-Service -Name $ServiceName
     return $service.Status
}

Export-ModuleMember -Function Test-Watchdog -Verbose:$false
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