How to configure log format?

[oliviermichaelis]

What would you like help with?

I would like help with my configuration

How are you running Renovate?

Self-hosted

If you're self-hosting Renovate, tell us which platform (GitHub, GitLab, etc) and which version of Renovate.

GitLab, renovate 37.408.0

Please tell us more about your question or problem

I would prefer renovate's log output to be JSON Lines so that the logs are parsed properly in my favorite log aggregation system.
Searching the documentation, I could only find the following:

renovate/docs/usage/self-hosted-configuration.md

Line 757 in b07f8bc

`logContext` is included with each log entry only if `logFormat="json"` - it is not included in the pretty log output.

I tried setting logFormat to json, but I got the following validation error:

2024-06-14 12:16:05.073	WARN: Config validation errors found in /usr/src/app/configuration/config.js
2024-06-14 12:16:05.073	"errors": [
2024-06-14 12:16:05.073	  {
2024-06-14 12:16:05.073	    "topic": "Configuration Error",
2024-06-14 12:16:05.073	    "message": "Invalid configuration option: logFormat"
2024-06-14 12:16:05.073	  }
2024-06-14 12:16:05.073	]

I couldn't find any other reference in the code. Is it possible to set the log format to json somehow?
Thank you for your help!

Logs (if relevant)

No response

[oliviermichaelis]

I found the this discussion which hints at setting the environment variable LOG_FORMAT to json. That works for me :)

[HonkingGoose]

We also have these docs:

• Renovate docs, Troubleshooting Renovate
• Renovate docs, Self-hosting, logging