Logging With NLog In Azure WebJobs - azure

Question

I've got an NLog configuration which works just fine for my web app (ASP.NET Core).
Now I'm trying to add NLog to my webjobs, but I can't figure out how to do it.
In Program.cs within the webjob project, I need to somehow inject IHostingEnvironment and ILoggerFactory (Both of which I inject into the StartUp constructor of the web app).
Once I know how to do that, I should be able to finish off the configuration.
If that's not possible, what alternatives do I have?
I'm not keen to use the TextWriter class passed into the webjob methods, as I imagine it would be difficult to extract the logs and route them to where I ultimately want it to go.

Answer 1

Following are steps of using NLog in WebJob.
Step 1, install NLog.Config package for your WebJob.
Install-Package NLog.Config
Step 2, add rules and targets to NLog.config files. Following is the sample of writing logs to a file.
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="logfile" xsi:type="File" fileName="file.txt" />
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="logfile" />
</rules>
</nlog>
Step 3, get logger instance using LogManager class.
private static Logger logger = LogManager.GetLogger("MyLog");
Step 4, after got the logger instance, you could write log using following code.
logger.Trace("Sample trace message");
logger.Debug("Sample debug message");