public override bool OnStart()
{
string wadConnectionString = "Microsoft.WindowsAzure.Plugins.Diagnostics.ConnectionString";
RoleInstanceDiagnosticManager roleInstanceDiagnosticManager =
CloudAccountDiagnosticMonitorExtensions.CreateRoleInstanceDiagnosticManager(RoleEnvironment.GetConfigurationSettingValue(wadConnectionString),
RoleEnvironment.DeploymentId, RoleEnvironment.CurrentRoleInstance.Role.Name,
RoleEnvironment.CurrentRoleInstance.Id);
DiagnosticMonitorConfiguration config = roleInstanceDiagnosticManager.GetCurrentConfiguration();
// should never be null, but this is a fallback in case it is. I recommend removing this in a production
// deployment
if (null == config)
{
config = DiagnosticMonitor.GetDefaultInitialConfiguration();
}
config.Logs.ScheduledTransferPeriod = TimeSpan.FromMinutes(15);
config.Logs.ScheduledTransferLogLevelFilter = Microsoft.WindowsAzure.Diagnostics.LogLevel.Undefined;
config.DiagnosticInfrastructureLogs.ScheduledTransferLogLevelFilter = Microsoft.WindowsAzure.Diagnostics.LogLevel.Warning;
config.DiagnosticInfrastructureLogs.ScheduledTransferPeriod = TimeSpan.FromMinutes(15);
config.Directories.ScheduledTransferPeriod = TimeSpan.FromMinutes(15);
roleInstanceDiagnosticManager.SetCurrentConfiguration(config);
System.Diagnostics.Trace.TraceInformation("Diagnostics Running");
#region Setup CloudStorageAccount Configuration Setting Publisher
// This code sets up a handler to update CloudStorageAccount instances when their corresponding
// configuration settings change in the service configuration file.
RoleEnvironment.Changed += (sender, arg) =>
{
var key = CloudConfigurationManager.GetSetting(arg.Changes.OfType <RoleEnvironmentConfigurationSettingChange>().ToString());
if (arg.Changes.OfType <RoleEnvironmentConfigurationSettingChange>()
.Any((change) => (change.ConfigurationSettingName == key.ToString())))
{
// The corresponding configuration setting has changed, propagate the value
RoleEnvironment.GetConfigurationSettingValue(key.ToString());
// {
// In this case, the change to the storage account credentials in the
// service configuration is significant enough that the role needs to be
// recycled in order to use the latest settings. (for example, the
// endpoint has changed)
RoleEnvironment.RequestRecycle();
//}
}
};
//});
#endregion
return(base.OnStart());
}
public void ConfigureAzureDiagnostics()
{
if (Enable)
{
var exists = Trace.Listeners.Cast <TraceListener>().Count(tracelistener => tracelistener.GetType().IsAssignableFrom(typeof(DiagnosticMonitorTraceListener))) > 0;
if (!exists)
{
try
{
var listener = new DiagnosticMonitorTraceListener();
Trace.Listeners.Add(listener);
}
catch (SecurityException)
{
return;
}
}
}
else
{
var exists = Trace.Listeners.Cast <TraceListener>().Count(tracelistener => tracelistener.GetType().IsAssignableFrom(typeof(ConsoleTraceListener))) > 0;
if (!exists)
{
Trace.Listeners.Add(new ConsoleTraceListener());
}
}
if (!RoleEnvironment.IsAvailable || !InitializeDiagnostics)
{
return;
}
var roleInstanceDiagnosticManager = CloudAccountDiagnosticMonitorExtensions.CreateRoleInstanceDiagnosticManager(
GetConnectionString(),
RoleEnvironment.DeploymentId,
RoleEnvironment.CurrentRoleInstance.Role.Name,
RoleEnvironment.CurrentRoleInstance.Id);
var configuration = roleInstanceDiagnosticManager.GetCurrentConfiguration();
if (configuration == null)
{
configuration = DiagnosticMonitor.GetDefaultInitialConfiguration();
ConfigureDiagnostics(configuration);
DiagnosticMonitor.Start(ConnectionStringKey, configuration);
}
}
/// <summary>
/// Updates the performance counter configuration based on the current list in ServiceConfiguration.cscfg.
/// </summary>
private static void ConfigureDiagnostics()
{
try
{
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(
WebRole.GetConfigurationSettingValue(WADConnectionString));
var roleInstanceDiagnosticManager = CloudAccountDiagnosticMonitorExtensions.CreateRoleInstanceDiagnosticManager(
RoleEnvironment.GetConfigurationSettingValue(WADConnectionString),
RoleEnvironment.DeploymentId,
RoleEnvironment.CurrentRoleInstance.Role.Name,
RoleEnvironment.CurrentRoleInstance.Id);
var roleDiagnosticMonitorConfiguration = roleInstanceDiagnosticManager.GetCurrentConfiguration();
// Copy settings from configuration.
double webRolePeriod;
if (!double.TryParse(WebRole.GetConfigurationSettingValue(WebRolePeriodName), out webRolePeriod))
{
Trace.WriteLine("WebRole environment diagnostics error: " + WebRolePeriodName + " parse failed.");
// Set the default to one minute.
webRolePeriod = 1d;
}
// Transfer diagnostic information once every webRolePeriod minutes.
TimeSpan transferPeriod = TimeSpan.FromMinutes(webRolePeriod);
roleDiagnosticMonitorConfiguration.PerformanceCounters.ScheduledTransferPeriod = transferPeriod;
double webRoleSampleRate;
if (!double.TryParse(WebRole.GetConfigurationSettingValue(WebRoleSampleRateName), out webRoleSampleRate))
{
Trace.WriteLine("WebRole environment diagnostics error: " + WebRoleSampleRateName + " parse failed.");
// Set the default to ten seconds.
webRoleSampleRate = 10d;
}
// Remove original performance counters and add new set
roleDiagnosticMonitorConfiguration.PerformanceCounters.DataSources.Clear();
string webRoleConfig = WebRole.GetConfigurationSettingValue(WebRoleConfigName);
string[] separators = new string[] { ConfigSeparator };
string[] webRoleCounterSpecifiers = webRoleConfig.Split(separators, StringSplitOptions.RemoveEmptyEntries);
foreach (string specifier in webRoleCounterSpecifiers)
{
roleDiagnosticMonitorConfiguration.PerformanceCounters.DataSources.Add(
new PerformanceCounterConfiguration()
{
CounterSpecifier = specifier,
SampleRate = TimeSpan.FromSeconds(webRoleSampleRate)
});
Trace.WriteLine("WebRole performance counter added: " + specifier);
}
roleInstanceDiagnosticManager.SetCurrentConfiguration(roleDiagnosticMonitorConfiguration);
}
catch (RoleEnvironmentException rex)
{
// The connection string was missing.
Trace.WriteLine("WebRole environment diagnostics error: " + rex.Message);
}
catch (InvalidOperationException iox)
{
// Parse of the connection string failed.
Trace.WriteLine("WebRole environment diagnostics error: " + iox.Message);
}
}
