Thanks in advance.
I want to use Nlog in Azure function V1,I have added Nlog and config file.I can see the ilogger object getting created, but that is not writing to console:(
Only tracewriter provided by Azure function alone working in console log.
Have never tried deploying an Azure Function, but many seems to have issues with deploying NLog.config (or other resource/config-files).
Maybe try putting the NLog-configuration into appsetting.json (Requires explicit load of NLogLoggingConfiguration) :
https://github.com/NLog/NLog.Extensions.Logging/wiki/Json-NLog-Config
The NLog Trace Target (with rawWrite=true) should support Azure Streaming Log.
See also: https://github.com/NLog/NLog.Extensions.Logging/wiki/NLog-cloud-logging-with-Azure-function-or-AWS-lambda
Related
I have function app where I have one HttpTrigger and 3 BlobTrigger functions. After I deployed it, http trigger is working fine but for others functions which are blob triggers, it gives following errors
"Stopping the listener 'Microsoft.Azure.WebJobs.Host.Blobs.Listeners.BlobListener' for function " for one function
Stopping the listener 'Microsoft.Azure.WebJobs.Host.Listeners.CompositeListener' for function
" for another two
I verified with other environments and config values are same/similar so not sure why we are getting this issue in one environment only. I am using consumption mode.
Update: When file is placed in a blob function is not getting triggered.
Stopping the listener 'Microsoft.Azure.WebJobs.Host.Blobs.Listeners.BlobListener' for function
I was observed the same message when working on the Azure Functions Queue Trigger:
This message doesn't mean the error in function. Due to timeout of Function activity, this message will appear in the App Insights > Traces.
I have stopped sending the messages in the Queue for some time and has been observed the traces like Web Job Host Stopped and if you run the function again or any continuous activity is present in the Function, then this message will not appear in the traces.
If you are using elastic Premium and has VNET integrated, the non-http trigers needs Runtime scale monitoring enabled.
You can find Function App-->Configuration--> Function runtime settings and turn on Runtime scale monitoring.
If function app and storage account which holds the metadata of the function Private linked, you will need to add the app settings WEBSITE_CONTENTOVERVNET = 1.
Also, make sure you have private linked for blob, file, table and queue on storage account.
I created ticket with MS to fix this issue. After analysis I did some code changes as
Function was async but returning void so changed to return Task.
For the trigger I was using connection string from app settings. But then I changed it to azureWebJobStorage(even though bobth were same) in function trigger attribute param
It started working. So posting here in case it is helpful for others
I have an ASP.NET Core 3.1 solution deployed into an Azure Web App hooked up to Application Insights. I can't for the life of me get exceptions and stack traces to log into Application Insights, instead I get a basic request trace with no exception information attached:
I've tried most combinations of setting up logging/application insights telemetry, here are some of the things I've tried:
services.AddApplicationInsightsTelemetry(); in the ConfigureServices() method of Startup.cs
Adding logging.AddApplicationInsights(); to my logging builder in Program.cs
Removing the custom error page exception handler in case that was affecting things
I have the APPINSIGHTS_INSTRUMENTATIONKEY environment variable set on my Web App in Azure.
I'm using the following code to generate exceptions in Application Insights:
[AllowAnonymous]
[Route("autoupdate")]
public async Task<IActionResult> ProfileWebhook()
{
var formData = await this.Request.ReadFormAsync();
var config = TelemetryConfiguration.CreateDefault();
var client = new TelemetryClient(config);
client.TrackException(new Exception(string.Join("~", formData.Keys)));
logger.LogError(new Exception(string.Join("~", formData.Keys)), "Fail");
throw new Exception(string.Join("~", formData.Keys));
}
Nothing is working and I'm going crazy! Any help greatly appreciated.
Usually, Application insights will guarantee that all the kinds of telemetries(like exceptions, trace, event etc.) will be arrived around 5 minutes, please refer this doc: How long does it take for telemetry to be collected?. But there is still a chance that it will take a longer time due to beckend issue(a very small chance).
If you're using visual studio, you can check if the telemetry is sent or not via Application Insights search.
You can also check if you're using a correct IKey, or if you have enabled sampling.
But if it keeps this behavior in your side, you should consider contacting MS support to find the root cause.
Hope it helps.
I am using the relatively new ILogger (vs. TraceWriter) option in Azure functions and trying to understand how logs are captured.
Here's my function:
public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = null)]HttpRequestMessage req, ILogger log)
{
log.LogTrace("Function 1 {level}", "trace");
log.LogWarning("Function 1 {level}", "warning");
log.LogError("Function 1 {level}", "error");
return req.CreateResponse(HttpStatusCode.OK, "Success!!!!");
}
When I look at the server logs, the LogFiles directory has a hierarchy.
The yellow highlighted file includes my log statements:
2017-08-19T13:58:31.814 Function started (Id=d40f2ca6-4cb6-4fbe-a05f-006ae3273562)
2017-08-19T13:58:33.045 Function 1 trace
2017-08-19T13:58:33.045 Function 1 warning
2017-08-19T13:58:33.045 Function 1 error
2017-08-19T13:58:33.075 Function completed (Success, Id=d40f2ca6-4cb6-4fbe-a05f-006ae3273562, Duration=1259ms)
The structured directory contains nothing here, but it seems to have various "codeddiagnostic" log statements in my real function applications directory.
What should I expect here? Ultimately, I would like to have a single sink for logging from all of my application components and take advantage of structured logging across the board.
The best way to collect structured logging from Azure Functions is to use Application Insights. One you defined that your Logger is based on ILogger, you can define a Template that specifies the properties you want to log. Then on Application Insights traces, using the Application Insights Query Language (aka Kusto) you can access the values of each of these properties with the name customDimensions.prop__{name}.
You can find a sample of how to do this with Azure Functions v2 on this post https://platform.deloitte.com.au/articles/correlated-structured-logging-on-azure-functions
Just FYI: Azure Functions running in isolated mode (.NET5 and .NET6) don't support structured logging using the ILogger from DI or provided in the FunctionContext. As of November 2021, there is an open bug about it: https://github.com/Azure/azure-functions-dotnet-worker/issues/423
As I understand it, the bug happens because all ILogger calls goes through the GRPC connection between the host and the isolated function, and in that process the message gets formatted instead of sending the original format and arguments. The Azure Insights connection that would record the structured log runs on the host and only receives the final message.
I plan on investigating some king of workaround, playing with direct access to Azure Insights inside the isolated process. If it works, I'll post the workaround in a comment at the bug linked above.
I had the same question. The log file logger doesn't really respect structured logging, but if you use AppInsights for Azure Functions it will in fact add custom properties for your structured logging
I had a conversation going about it here
https://github.com/Azure/azure-webjobs-sdk-script/issues/1675
We are sending all trace logs to our NLog logger. (with a trace listener)
Nlog is configured to work with DryIoC.
Locally this works perfect, however, in Azure (web app), the first trace message is logged, before we could create our DryIoc container. Even a PreAppStartMethodAttribute does not help, as the trace log has occurred even before the PreAppStartMethodAttribute.
Is there a way to do some initialization tasks before azure logs it's first trace message?
I found a work-around by using an async wrapper that prevents NLog from flushing the data until the container/configuration has been initiliazed.
I've configured the Azure Diagnostics so that the logs get uploaded to a storage table. I'm using Trace.TraceXxx from my code and all works well.
Now I'm trying to add tracing from the Role OnStart() and OnStop() methods. I know that the tracing works as I see the lines in the Debug window when running in the emulator. But from the cloud deployment, it seems that these trace lines never get uploaded to the table. My guess is that it is somewhat related to TraceSources, as the only trace lines I've in the table come from the w3wp.exe source... Any hint ?
Thanks
Like you said you can add the trace listener using the WaIISHost.exe.config, but besides that you can also add the trace listener in code (you'll need a reference to Microsoft.WindowsAzure.Diagnostics.dll):
public class WebRole : RoleEntryPoint
{
public override void Run()
{
var listener = new Microsoft.WindowsAzure.Diagnostics.DiagnosticMonitorTraceListener();
Trace.Listeners.Add(listener);
...
}
}
Another way of setting up diagnostics is through the configuration file. If you created a VS solution recently, it will automatically create the diagnostics plug-in and configuration for the trace listener. With the config file (diagnostics.wadcfg) there is no code that needs to be written for the different data sources. Here is a link where you can get started and a sample file:
http://msdn.microsoft.com/en-us/library/gg604918.aspx
You cannot include custom performance counters right now and you need to make sure that you don’t try to allocate more than 4GB of buffer to anything (you can leave at 0), or it tends to fail.
Note, the time interval format (e.g PT1M). That is a serialization format, so PTXM is X minutes, while PTXS is X in seconds. You need to mark this as content and copy always in Visual Studio (place at root of project) so it gets packaged.
And here is a link to the three ways to setup diagnostics
http://msdn.microsoft.com/en-us/library/windowsazure/hh411541.aspx
Ranjith
http://www.opstera.com