To install, just select fluent-bit in your defconfig. See the Config.in file for all configuration options.
BR2_PACKAGE_FLUENT_BIT=y
The default config file is written to:
/etc/fluent-bit/fluent-bit.conf
Fluent-bit is automatically started by the S99fluent-bit script.
All configurations with a toolchain that supports threads and dynamic library linking are supported.