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:
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 http://go.microsoft.com/fwlink/?LinkId=166357.
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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