Have you ever connected Fluent Bit or Filebeat?

Yes, I have had to use both Fluent Bit and Filebeat for collecting and transmitting logs to centralized monitoring systems such as Elasticsearch or Loki.

I often use Fluent Bit in Kubernetes clusters as a lightweight agent for collecting logs from containers, thanks to its low resource consumption and support for many output plugins.

I used Filebeat for collecting logs from virtual machines and servers where simple and reliable log shipping to Elasticsearch is needed. It integrates well with the Elastic Stack and allows flexible parsing and filtering of logs.

An example configuration of Fluent Bit for sending logs to Elasticsearch:

[INPUT]
    Name tail
    Path /var/log/app/*.log
    Parser json

[OUTPUT]
    Name es
    Match *
    Host elasticsearch.local
    Port 9200
    Index app-logs

Thus, the choice between Fluent Bit and Filebeat depends on the infrastructure and performance requirements.