Promtail: burst required when defining a limit stage

[coderazzi]

Describe the bug
Adding a limit stage to the promtail configuration requires to provide always a burst value, greater than zero. Upon the documentation, this is an optional value. Not defining it, or defining it as bust: 0 creates an invalid pipeline stage

To Reproduce
Steps to reproduce the behavior:

1. Started Loki 2.9.0
2. Started Promtail 2.9.0
3. Check the promtail logs

Expected behavior
Working promtail agent

Environment:

• Infrastructure: docker
• Deployment tool: shell

Screenshots, Promtail config, or terminal output
The logs shows: invalid limit stage config: limit stage failed to parse rate or burst

[hainenber]

I can work on this. Please help assigning :D

[hainenber]

I can work on this. Please help assigning :D