Onboarding the .Net CD Agent

These steps outline the onboarding steps needed on the environment, with the CD agent, added to each component that builds up the Application Under Test.

Configuration steps

Agent’s Parameters Reference

Mandatory parameters

Property (CLI)

Required

Description

Env variable

JSON

--appName

Yes

Name of the target application

Sample Commands

Downloading the agent

For example, you can use the following commands to automate the process

--include

Comma-separated list of files to include in scan. Supports wildcard (* = any string, ? = any character) characters.

Default value: *.dll,*.exe

SL_SCAN_INCLUDEFILES

--exclude

Comma-separated list of files to exclude from the scan. Supports wildcard (* = any string, ? = any character) characters.
Default value: System.", "Microsoft.

SL_SCAN_EXCLUDEFILES

--includedAssemblies

Comma-separated list of assemblies to include. Supports wildcard (* = any string, ? = any character) characters.

SL_SCAN_INCLUDEASSEMBLIES

--excludedAssemblies

Comma-separated list of assemblies to exclude from the scan. Supports wildcard (* = any string, ? = any character) characters.

Default value: mscorlib, System., Microsoft.

SL_SCAN_EXCLUDEASSEMBLIES

--srcRootDir

The project source root directory, where all paths will be made relative to

SL_SCAN_SRCROOTDIR

"scan": {
  "srcRootDir": ""
}

--target

The name of the target application that will be started

SL_PROFILER_TARGET

--targetArgs

Arguments to be passed to the target process

SL_PROFILER_TARGETARGS

--workingDir

The path to the working directory. By default, it’s using current working directory.

SL_PROFILER_WORKINGDIR

Logging parameters

To enable logs, you can set the following parameters

Parameter (CLI)

Description

Env variable

JSON

--profilerLogLevel

Log level. Default and Recommended value is 6

• 0=None

• 3=Errors

• 4=Warnings

• 6=Info (Light Debug)

• 7=Debug(Full)

SL_PROFILER_LOGLEVEL

"profiler": {
  "logLevel": 6
}

--profilerLogDir

Enables logging profiler data to file. Requires LogLevel to be specified.

SL_PROFILER_LOGDIRECTORY

"profiler": {
  "logDirectory": ""
}

Sample Commands

Downloading the agent

For example, you can use the following commands to automate the process

"general": {
  "appName": ""
}

"general": {
  "branchName": ""
}

"general": {
  "buildName": ""
}

"general": {
  "labId": ""
}

"general": {
  "binDir": ""
}

"general": {
  "includeNamespaces": ""
}

Optional parameters

These parameters may be required due to your specific configuration or environment’s limitations (e.g., proxy).

Property

Description

Env variable

JSON

--excludeNamespace

Comma-separated list of namespaces to exclude from the scan. Supports wildcard (* = any string, ? = any character) characters.

Default value: System.*, Microsoft.*

SL_SCAN_EXCLUDENAMESPACES

wget -nv -O sealights-dotnet-agent-linux.tar.gz https://agents.sealights.co/dotnetcore/latest/sealights-dotnet-agent-linux-self-contained.tar.gz
mkdir sl-dotnet-agent && tar -xzf ./sealights-dotnet-agent-linux.tar.gz --directory ./sl-dotnet-agent
echo "[Sealights] .NetCore Agent version is: `cat ./sl-dotnet-agent/version.txt`"

iwr -OutFile sealights-dotnet-agent.zip -UseBasicParsing -Uri https://agents.sealights.co/dotnetcore/latest/sealights-dotnet-agent-windows-self-contained.zip
Expand-Archive .\sealights-dotnet-agent.zip -DestinationPath sl-dotnet-agent -Force
Write-Output "[Sealights] .NetCore Agent version is: $(Get-Content .\sl-dotnet-agent\version.txt)"

Sample configuration in a docker file

ENV CORECLR_ENABLE_PROFILING=1
ENV CORECLR_PROFILER="{3B1DAA64-89D4-4999-ABF4-6A979B650B7D}"
ENV CORECLR_PROFILER_PATH_32=/sealights/libSL.DotNet.ProfilerLib.Linux.so
ENV CORECLR_PROFILER_PATH_64=/sealights/libSL.DotNet.ProfilerLib.Linux.so
ENV SL_PROFILER_INITIALIZECOLLECTOR=1
ENV SL_PROFILER_INITIALIZECOLLECTOR_MODE="cdAgent"
ENV SL_PROFILER_BLOCKING_CONNECTION_STARTUP="ASYNC"
ENV SL_FEATURES_IDENTIFYMETHODSBYFQN="true"
ENV SL_SESSION_TOKENFILE=/sealights/sltoken.txt

ARG BUILD_NUMBER
ENV SL_GENERAL_APPNAME="otel_cartservice"
ENV SL_GENERAL_BRANCHNAME="main"
ENV SL_GENERAL_BUILDNAME=$BUILD_NUMBER
ENV SL_LABID="my_lab"
ENV SL_SCAN_BINDIR="/app"
ENV SL_SCAN_INCLUDENAMESPACES_0="cartservice.*"
ENV SL_SCAN_INCLUDEASSEMBLIES="*cartservice"

Sample K8s yaml

spec:
  initContainers:
  - name: sealights-dotnet-agent
    image: ubuntu:latest
    imagePullPolicy: IfNotPresent
    command: ["/bin/sh", "-c"]
    args:
      - |
		wget -nv -O sealights-dotnet-agent-linux.tar.gz https://agents.sealights.co/dotnetcore/latest/sealights-dotnet-agent-linux-self-contained.tar.gz

		tar -xzf ./sealights-dotnet-agent-linux.tar.gz --directory 

/

sealights
		echo "[Sealights] .NetCore Agent version is: 

$(cat 

/

sealights/version.

Windows

txt)"
    volumeMounts:
      - mountPath: /sealights
        name: sealights-dotnet-agent

Configuration commands

-file
  
  containers:
  - name: your-app-service-container
    # other container configurations
	# [...]
    env:
	### SL Profiler - Generic vars
	- name: SL_TOKEN
	    secretKeyRef:
          name: sealights
          key: SL_TOKEN
	- name: CORECLR_ENABLE_PROFILING
	  value: "1"
	- name: CORECLR_PROFILER
	  value: "{3B1DAA64-89D4-4999-ABF4-6A979B650B7D}"
	- name: CORECLR_PROFILER_PATH_32
	  value: /sealights/libSL.DotNet.ProfilerLib.Linux.so
	- name: CORECLR_PROFILER_PATH_64
	  value: /sealights/libSL.DotNet.ProfilerLib.Linux.so
	- name: SL_PROFILER_INITIALIZECOLLECTOR_MODE
	  value: "cdAgent"
	- name: SL_PROFILER_INITIALIZECOLLECTOR
	  value: 1
	- name: SL_PROFILER_BLOCKING_CONNECTION_STARTUP
	  value: "ASYNC"
	- name: SL_FEATURES_IDENTIFYMETHODSBYFQN
	  value: "true"

	### SL Profiler - Env Specific vars
	- name: SL_SCAN_BINDIR
	  value: "/app"
	- name: SL_LABID
	  value: "integ_poc_sl"

	### SL Profiler - App Specific vars
	- name: SL_GENERAL_APPNAME
	  value: "myproject-myapp-service"
	- name: SL_GENERAL_BRANCHNAME
	  value: "sample-branch"
	- name: SL_GENERAL_BUILDNAME
	  value: "1.0.2"
	- name: SL_SCAN_INCLUDENAMESPACES_0
	  value: "myproject.*"
	- name: SL_SCAN_INCLUDEASSEMBLIES
      #reduce files to scan to speed up startup
	  value: "*myproject*"

	volumeMounts:
    - mountPath: /sealights
      name: sealights-dotnet-agent-file
  volumes:
    - name: sealights-dotnet-agent-file
      emptyDir: {}

IIS Application

• Make sure that the publish mode is not “Single file“ or “Portable“.

• Prepare the environment variables below (absolute paths are better)

  Code Block
  language powershell
  COR_ENABLE_PROFILING=1 COR_PROFILER={01CA2C22-DC03-4FF5-8350-59E32A3536BA} COR_PROFILER_PATH=C:\AbsolutePathToAgentFolder\SL.DotNet.ProfilerLib.Windows_x64.dll COR_PROFILER_PATH_32=C:\AbsolutePathToAgentFolder\SL.DotNet.ProfilerLib.Windows_x86.dll COR_PROFILER_PATH_64=C:\AbsolutePathToAgentFolder\SL.DotNet.ProfilerLib.Windows_x64.dll CORECLR_ENABLE_PROFILING=1 CORECLR_PROFILER={01CA2C22-DC03-4FF5-8350-59E32A3536BA} CORECLR_PROFILER_PATH_32=C:\AbsolutePathToAgentFolder\SL.DotNet.ProfilerLib.Windows_x86.dll CORECLR_PROFILER_PATH_64=C:\AbsolutePathToAgentFolder\SL.DotNet.ProfilerLib.Windows_x64.dll SL_PROFILER_INITIALIZECOLLECTOR=1 SL_PROFILER_INITIALIZECOLLECTOR_MODE=cdAgent SL_FEATURES_IDENTIFYMETHODSBYFQN=true SL_PROFILER_BLOCKING_CONNECTION_STARTUP=ASYNC SL_AGENT_PORT=31031 SL_EXE_PATH=C:\AbsolutePathToAgentFolder\SL.DotNet.exe SL_SESSION_TOKENFILE=\PathToLogs\scripts\tokens\dev.token useMsProfiler=False SL_GENERAL_BUILDNAME=PICCDAGENT-IIS-5 SL_GENERAL_APPNAME=TestAppWeatherApi SL_GENERAL_BRANCHNAME=main SL_SCAN_BINDIR=c:\inetpub\TestWebApp\ SL_LABID=integ_main_TestAppWeatherApi SL_SCAN_INCLUDENAMESPACES_0=StatelessWebApp.* SL_SCAN_INCLUDEASSEMBLIES=*StatelessWebApp SL_PROFILER_INCLUDEPROCESSFILTER=*TestWebApp* SL_LOGGING_ENABLED=true SL_LogLevel=6 SL_Logging_toFile=true SL_LogDir=\PathToLogs\logs SL_LOGGING_FileName=\PathToLogs\logs\listener_pic

• Set the environment variables to IIS Services in the Windows Registry.

  • For that, open the registry keys Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WAS and Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC

  • Add a new Multi-String value called Environment

    Image Added

• Restart the IIS Server via the usual iisreset /restart

• Perform the query to the web application to wake it up.

Simple Web App (Desktop, Windows)

This simple use case illustrates how to collect coverage with the CD agent from a web application started without parameters.

C:\Sealights\Agent\SL.DotNet.exe cdAgent --appName "TestApp" --branchName "main" --buildName "1.16.10" --labId "integ_demo_DesktopWeatherApp" \
    --binDir "C:\Program Files\WeatherApi" --includeNamespace "WeatherApi*" --target "C:\Program Files\WeatherApi\WeatherApi.exe" 

Microservice (Alpine-based docker file)

DockerFile

FROM mcr.microsoft.com/dotnet/runtime:6.0-alpine

WORKDIR /app
COPY --from=build /app/out .
COPY Scripts/start-app.sh .

# Sealights - install prereq, agent, token, bsid
# Best practice it to mount a pre-existing sealights directory depending on the environment (test or prod)
RUN mkdir -p /sealights/{agent,logs}
RUN wget -nv -O sealights-dotnet-agent-alpine.tar.gz https://agents.sealights.co/dotnetcore/latest/sealights-dotnet-agent-alpine-self-contained.tar.gz
RUN tar -xzf ./sealights-dotnet-agent-alpine.tar.gz --directory /sealights/agent
COPY ["SeaLights/sltoken.txt", "/sealights/"]
RUN chmod -R 777 /sealights

# Set the script as the entrypoint
ENTRYPOINT ["sh", "start-app.sh", "YourAppName.dll"]

Startup script

#!/bin/sh
# Check if sealights folder exists
if [ -d "/app/sealights/" ]; then
    /app/sealights/agent/SL.DotNet cdAgent --appName ms-gateway-api --branchName poc --buildName $(cat /app/version.txt) \
                  --binDir /app --includeNamespace MyCompany.* --target dotnet --targetArgs $1 --workingDir /app \
                  --identifyMethodsByFqn --profilerLogLevel 6 --profilerLogDir /app/sealights/logs --labId integ_POC_DemoApp
else
    dotnet $1
fi

Agent’s Parameters Reference

Mandatory parameters - .Net/Agent

Mandatory parameters - Application specific

Optional parameters

These parameters may be required due to your specific configuration or environment’s limitations (e.g., proxy).

Logging parameters

To enable logs, you can set the following parameters