docs: Add log.file argument to README

[PolygonError]

Adds a line which explains the log.file argument, and explains how the MSI installer adds an argument which defaults this to eventlog.

Description taken from log flag setup under internal/log/flag/flag.go

[jkroepke]

Thanks a lot!

Background: MSI installer has set it to eventlog, since in a Windows Service context stderr is piped to null.

[PolygonError]

Thanks a lot!

Background: MSI installer has set it to eventlog, since in a Windows Service context stderr is piped to null.

Thanks for the info, I never realised until I went to look for an issue and found a bunch of events from it which I don't care about, so I just changed it to log to a text file in the installation directory.

[Zeeeeta]

Thanks a lot!
Background: MSI installer has set it to eventlog, since in a Windows Service context stderr is piped to null.

Thanks for the info, I never realised until I went to look for an issue and found a bunch of events from it which I don't care about, so I just changed it to log to a text file in the installation directory.

May I know how do you set it to a text file?

I use the installer MSI change the setting to
--log.file "C:\Program Files\windows_exporter\log.txt"
but it stuck there and cant start the service. (everyone has full control on folder, stuck no matter log.txt exists or not)

Thanks.

[jkroepke]

please create a new issue for that! thank you.