Patterns in lables

[paradoxxl]

It is possible to use pattens such as %C{1.} as values in labels which are then dynamically resolved?

[tkowalcz]

Right now it is not possible. Only MDC lookups ${ctx:} are supported. There are two reasons:

1. Tjahzi is performance oriented so I want to make sure every feature like the is implemented with no allocations.
2. Loki does not like high cardinality labels so I did not consider dynamically generated labels to be an important feature.

If you have some specific patterns you would like me to support then please list them but I can't promise when that will happen.

[paradoxxl]

Thank you for clarification. This seems quite reasonable.

For logging monolithic applications, the origin of the message could be an equivalent of using something like an 'app'-label for a distributed application. Therefore, class or logger could be quite valuable label for improving search performance.

What do you think about this?

[tkowalcz]

It sounds very reasonable. I'll take a look and will keep you posted.

[tkowalcz]

Newest release 0.9.13 uses PatternLayout to implement dynamic label value generation.

I have marked it as pre release until I have some prod deployments with it.