/// <summary>
/// Initializes the ModuleClient and sets up the callback to receive
/// messages containing temperature information
/// </summary>
private static async Task Init()
{
var mqttSetting = new MqttTransportSettings(TransportType.Mqtt_Tcp_Only);
ITransportSettings[] settings = { mqttSetting };
// Open a connection to the Edge runtime
var ioTHubModuleClient = await ModuleClient.CreateFromEnvironmentAsync(settings);
await ioTHubModuleClient.OpenAsync();
Console.WriteLine("IoT Hub module client initialized.");
var configuration = await GetConfiguration(ioTHubModuleClient);
Console.WriteLine($"Obtained configuration: {configuration}");
var identifier = Environment.GetEnvironmentVariable("MessageIdentifier") ?? "IoTEdgeMetrics";
Console.WriteLine($"Using message identifier {identifier}");
var messageFormatter = new MessageFormatter(configuration.MetricsFormat, identifier);
var scraper = new Scraper(configuration.Endpoints.Values.ToList());
IMetricsSync metricsSync;
if (configuration.SyncTarget == SyncTarget.AzureLogAnalytics)
{
string workspaceId = Environment.GetEnvironmentVariable("AzMonWorkspaceId") ??
Environment.GetEnvironmentVariable("azMonWorkspaceId") ?? // Workaround for IoT Edge k8s bug
throw new Exception("AzMonWorkspaceId env var not set!");
string wKey = Environment.GetEnvironmentVariable("AzMonWorkspaceKey") ??
Environment.GetEnvironmentVariable("azMonWorkspaceKey") ??
throw new Exception("AzMonWorkspaceKey env var not set!");
string clName = Environment.GetEnvironmentVariable("AzMonCustomLogName") ??
Environment.GetEnvironmentVariable("azMonCustomLogName") ??
"promMetrics";
metricsSync = new LogAnalyticsMetricsSync(messageFormatter, scraper, new AzureLogAnalytics(workspaceId, wKey, clName));
}
else
{
metricsSync = new IoTHubMetricsSync(messageFormatter, scraper, ioTHubModuleClient);
}
var scrapingInterval = TimeSpan.FromSeconds(configuration.ScrapeFrequencySecs);
ScrapingTimer = new Timer(ScrapeAndSync, metricsSync, scrapingInterval, scrapingInterval);
}
public IoTHubMetricsSync(MessageFormatter messageFormatter, Scraper scraper, ModuleClient moduleClient)
{
this.messageFormatter = messageFormatter ?? throw new ArgumentNullException(nameof(messageFormatter));
this.scraper = scraper ?? throw new ArgumentNullException(nameof(scraper));
this.moduleClient = moduleClient;
}
public LogAnalyticsMetricsSync(MessageFormatter messageFormatter, Scraper scraper, AzureLogAnalytics logAnalytics)
{
this.messageFormatter = messageFormatter ?? throw new ArgumentNullException(nameof(messageFormatter));
this.scraper = scraper ?? throw new ArgumentNullException(nameof(scraper));
this.logAnalytics = logAnalytics;
}