topic Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK in Splunk AppDynamics

Problems .net 5 WebAPI unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Tue, 28 Dec 2021 20:08:06 GMT

Hello, I have a net 5 WebAPI deployed in a docker linux container. I want to instrument the application in AppDynamics. The application works and I test it everytime with swagger

I've tried 2 implementations

Install the .NET Core Microservices Agent for Windows -> https://docs.appdynamics.com/4.5.x/en/application-monitoring/install-app-server-agents/net-agent/net-microservices-agent/install-the-net-core-microservices-agent-for-windows
.NET Core for Linux SDK -> https://docs.appdynamics.com/21.5/en/application-monitoring/install-app-server-agents/net-agent/net-core-for-linux-sdk

The first scenario didn't work for me I got a consistent error, a single log line saying "use clr profiler",

The second does nothing at all I have no feedback what so ever and no log is created

This is my Docker configuration

"Docker": {
"commandName": "Docker",
"launchBrowser": true,
"launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/Swagger",
"environmentVariables": {
"CORECLR_PROFILER": "{57e1aa68-2229-41aa-9931-a6e93bbc64d8}",
"CORECLR_ENABLE_PROFILING": "1",
"CORECLR_PROFILER_PATH": "/app/bin/Debug/net5.0/runtimes/linux-64/native/libappdprofiler.so",
"APPDYNAMICS_LOG_PATH": "/app/bin/Debug/net5.0"
},
"publishAllPorts": true,
"useSSL": true
}

And this is the app dynamics configuration
{
"feature": [
"FULL_AGENT"
],
"controller": {
"host": "MYHOST.saas.appdynamics.com",
"port": 443,
"account": "myAccount",
"password": "mypassword",
"ssl": true,
"enable_tls12": true
},
"application": {
"name": "myapplicationname",
"tier": "my-appliation-tier",
"node": ""
},
"log": {
"directory": "/app/bin/Debug/net5.0",
"level": "ALL"
}
}

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

iamryan — Thu, 06 Jan 2022 17:48:58 GMT

Hi @Maximiliano.Guillen,

I found this info - please let me know if it helped.

Can you please confirm the .Net Microservices Agent version that you are using to instrument the .Net 5 application? The .Net Microservices agent started supporting .Net 5 with agent version >21.10. Ref below link for details:
https://docs.appdynamics.com/21.10/en/application-monitoring/install-app-server-agents/net-agent/net-microservices-agent/net-core-microservices-agent-support

If you are using an older agent, could you kindly try upgrading to the latest 21.11 version of the agent and verify the behavior?

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Mon, 17 Jan 2022 17:09:56 GMT

Hi Ryan,

I was using the latest, its a brand new solution.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

iamryan — Tue, 18 Jan 2022 17:45:58 GMT

Hi @Maximiliano.Guillen,

Just to confirm, you are using the latest version, and are still having the issue?

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Tue, 18 Jan 2022 20:41:34 GMT

Yes with the .net core agent from the nuget package yes, I was going to test the linux agent from step 2 but I'm changing scope for now

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

iamryan — Tue, 18 Jan 2022 22:26:57 GMT

Hi @Maximiliano.Guillen,

I was chatting with some internal people and it's been suggested you contact support.

You can get to the Support Portal from here: https://www.appdynamics.com/support

Please do follow back up on this thread if a solution is reached with support.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Sarabjit-Tatra — Tue, 18 Jan 2022 22:39:36 GMT

@Maximiliano.Guillen - As your application is net 5 WebApi deployed in a docker linux container you will need to use the .Net agent on Linux as mentioned below:

https://docs.appdynamics.com/22.1/en/application-monitoring/install-app-server-agents/net-agent/net-agent-for-linux/install-the-net-agent-for-linux

Also kindly find below the below the inputs for 2 implementation you tried:

Install the .NET Core Microservices Agent for Windows
- [AppD-This will only work for .Net core application on Windows and as you are using WebApi deployed in a docker linux you will need to use the above link mentioned for .Net agent on Linux]
.NET Core for Linux SDK
- [AppD-Thieir is no new work happeing on this as thier was some custom configruation requried to detect BTs etc so you will need to use the above link mentioned for .Net agent on Linux as this detects the BTs etc OOTB]

Let us know if you still face any issues.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Wed, 19 Jan 2022 13:45:33 GMT

Thanks for the help, I'll try this next, and re-open or create a support ticket later if necessary.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Wed, 19 Jan 2022 18:17:24 GMT

Hi @Sarabjit.Tatra

Is it mandatory for the linux files to be in opt/appdynamics/dotnet ?
I could place them in what ever folder in the container and map the env variable, correct?

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Sarabjit-Tatra — Wed, 19 Jan 2022 19:28:17 GMT

@Maximiliano.Guillen - Yes you can keep in any folder we just need to make sure all the AppD dlls are also present their.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Maximiliano_Gui — Wed, 19 Jan 2022 23:13:12 GMT

I had some progress but now I get the following in the container log

appd.agent.profiler(Info): Successfully locate config file from /app/bin/Debug/net5.0/MyProject.AppDynamicsConfig.json
appd.agent.profiler(Warn): Failed to verify loaded config : node nameconfig file entry or environment variable APPDYNAMICS_AGENT_NODE_NAME is empty
appd.agent.profiler(Warn): Failed to load configuration, profiler will not attach.
appd.agent.profiler(Warn): Profiler initialization failed and .NET Agent is disabled.

Re: Problems .net 5 WebAPi unable to instrument using .NET Core for Linux SDK

Sarabjit-Tatra — Thu, 20 Jan 2022 17:14:05 GMT

@Maximiliano.Guillen - You need to specify node name as its missing in you JSON using "node": "" tag or setting APPDYNAMICS_AGENT_NODE_NAME environment variable.