BUG: Structured logging in Golang

[vutkin]

Hi @Yannig, you did a PR where logger was changed: https://github.com/iamseth/oracledb_exporter/pull/243/files
Old logs looks like:

New implementation in latest build:

Please note that all logs lack of whitespaces

I suggest to use json formatted log in PRODUCTION profile and switch to most popular top go loggers. I like https://github.com/sirupsen/logrus.

TIA,
Regards, Viktor.

[Yannig]

Hi @vutkin

Do you think we can close this issue?

Regards

[vutkin]

Now latest release looks good, if don't need structured logs in json, so make sense to close it.

[Yannig]

In fact, it can make sense to have a JSON output.

[Yannig]

I let this issue open for the moment and I will try to improve logger if I have time.