Thanks, this works with this configuration :
indices:
- index: "functional-%{+yyyy.MM.dd}"
when.equals:
logger_name: "functional"
- index: "technical-%{+yyyy.MM.dd}"
when.equals:
logger_name: "technical"
- index: "other-%{+yyyy.MM.dd}"
when.equals:
logger_name: "other"
I open a issue here : https://github.com/elastic/beats/issues/3227