Azure Miniseries #4: Monitoring Applications

In this screencast, we'll take a look at monitoring Azure applications by capturing event logs and performance counters. We'll also look at using PowerShell to deploy and configure applications using the management API. Finally, we'll take a sneak peek at Azure Diagnostics Manager, a tool from Cerebrata that allows you explore event logs and look at performance counters visually. Here are some links from the screencast: Windows Azure Cmdlets Cerebrata (Cloud Storage Studio and Azure Diagnostics Monitor) Finally, let’s get into some code snippets! Watch for wrap on the PowerShell lines, and note the single quote ` character as the line continuation: Creating a self-signed certificate command:
makecert -r -pe -a sha1 -n "CN=Azure Service Test" -ss My -len 2048 -sp "Microsoft Enhanced RSA and AES Cryptographic Provider" -sy 24 AzureServiceTest.cer
Uploading a new deployment to the staging slot, and starting it (requires Azure CmdLets):
$cert = Get-Item cert:\CurrentUser\My\{thumbprint} $sub = "{subscription GUID}" $servicename = "{service name}" $package = "CloudApp.cspkg" $config = "ServiceConfiguration.cscfg" [DateTime]$datelabel = Get-Date $lbl = $datelabel.ToString("MM-dd-yyyy-HH:mm") Write-Host "Label for deployment: " $lbl Add-PSSnapin AzureManagementToolsSnapIn Get-HostedService $servicename -Certificate $cert -SubscriptionId $sub | New-Deployment -Slot Staging $package $config -Label $lbl | Get-OperationStatus -WaitToComplete Get-Deployment staging -serviceName $servicename -SubscriptionId $sub -Certificate $cert | Set-DeploymentStatus running | Get-OperationStatus -WaitToComplete
Increasing the number of instances:
Add-PSSnapin AzureManagementToolsSnapIn $cert = Get-Item cert:\CurrentUser\My\{thumbprint} $sub = "{subscription GUID}" $servicename = "{service name}" $storage = "{storage name}" #get storage account name and key $key = (Get-StorageKeys -ServiceName $storage -Certificate $cert -SubscriptionId $sub).Primary $deployId = (Get-HostedService $servicename -SubscriptionId $sub -Certificate $cert | Get-Deployment Production).DeploymentId        Get-HostedService $servicename -Certificate $cert -SubscriptionId $sub |     Get-Deployment -Slot Staging |     Set-DeploymentConfiguration {$_.RolesConfiguration["WebRole1"].InstanceCount += 1}
Updating the performance counters – specifically, adding total processor time, ASP.NET req/sec, and memory usage to be polled every 30 seconds, and uploaded every 1 minute:
Add-PSSnapin AzureManagementToolsSnapIn $cert = Get-Item cert:\CurrentUser\My\{thumbprint} $sub = "{subscription GUID}" $servicename = "{service name}" $storage = "{storage name}" #get storage account name and key $key = (Get-StorageKeys -ServiceName $storage -Certificate $cert -SubscriptionId $sub).Primary $deployId = (Get-HostedService $servicename -SubscriptionId $sub -Certificate $cert | Get-Deployment Production).DeploymentId        # rate at which counters are polled $rate = [TimeSpan]::FromSeconds(30) Get-DiagnosticAwareRoles -StorageAccountName $storage -StorageAccountKey $key -DeploymentId $deployId | foreach {     $role = $_     write-host $role     Get-DiagnosticAwareRoleInstances $role -DeploymentId $deployId `         -StorageAccountName $storage -StorageAccountKey $key |     foreach {         $instance = $_         $config = Get-DiagnosticConfiguration -RoleName $role -InstanceId $_ -StorageAccountName $storage `              -StorageAccountKey $key -BufferName PerformanceCounters -DeploymentId $deployId                     $processorCounter = New-Object Microsoft.WindowsAzure.Diagnostics.PerformanceCounterConfiguration `                 -Property @{CounterSpecifier='\Processor(_Total)\% Processor Time'; SampleRate=$rate }         $memoryCounter = New-Object Microsoft.WindowsAzure.Diagnostics.PerformanceCounterConfiguration `                 -Property @{CounterSpecifier='\Memory\Available Mbytes'; SampleRate=$rate }         $requestsCounter = New-Object Microsoft.WindowsAzure.Diagnostics.PerformanceCounterConfiguration `                 -Property @{CounterSpecifier='\ASP.NET Applications(__Total__)\Requests/Sec'; SampleRate=$rate }         $config.DataSources.Clear()         $config.DataSources.Add($processorCounter)         $config.DataSources.Add($memoryCounter)         $config.DataSources.Add($requestsCounter)         Set-PerformanceCounter -PerformanceCounters $config.DataSources -RoleName $role `              -InstanceId $instance -DeploymentId $deployId `              -TransferPeriod 1 `              -StorageAccountName $storage -StorageAccountKey $key                          }   }
And finally, the webrole.cs class from the screencast:
public class WebRole : RoleEntryPoint     {         public override bool OnStart()         {             DiagnosticMonitorConfiguration diagConfig =                 DiagnosticMonitor.GetDefaultInitialConfiguration();             diagConfig.PerformanceCounters.DataSources.Add(                 new PerformanceCounterConfiguration()                 {                     CounterSpecifier = @"\Processor(_Total)\% Processor Time",                     SampleRate = TimeSpan.FromSeconds(5)                 });             diagConfig.PerformanceCounters.DataSources.Add(                 new PerformanceCounterConfiguration()                 {                     CounterSpecifier = @"\Memory\Available Mbytes",                     SampleRate = TimeSpan.FromSeconds(5)                 });             diagConfig.PerformanceCounters.ScheduledTransferPeriod =                 TimeSpan.FromMinutes(1);             diagConfig.Logs.ScheduledTransferLogLevelFilter = LogLevel.Information;             diagConfig.Logs.ScheduledTransferPeriod = TimeSpan.FromMinutes(1);             DiagnosticMonitor.Start("DiagnosticsConnectionString", diagConfig);             System.Diagnostics.Trace.TraceInformation("Done configuring diagnostics.");             // For information on handling configuration changes             // see the MSDN topic at             RoleEnvironment.Changing += RoleEnvironmentChanging;             return base.OnStart();         }         public override void OnStop()         {             System.Diagnostics.Trace.TraceWarning("Onstop called.");             base.OnStop();         }         private void RoleEnvironmentChanging(object sender, RoleEnvironmentChangingEventArgs e)         {             // If a configuration setting is changing             if (e.Changes.Any(change => change is RoleEnvironmentConfigurationSettingChange))             {                 // Set e.Cancel to true to restart this role instance                 e.Cancel = true;             }         }     }

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