Lua

Due to the necessity to have a flexible filtering mechanism, now is possible to extend Fluent Bit capabilities writing simple filters using Lua programming language. A Lua based filter takes two steps:

• Configure the Filter in the main configuration

Content:

• Configuration Parameters
• Lua Script Filter API

The plugin supports the following configuration parameters:

From the command line you can use the following options:

In your main configuration file append the following Input, Filter & Output sections:

The life cycle of a filter have the following steps:

• Upon Tag matching by filter_lua, it may process or bypass the record.
• If filterlua accepts the record, it will invoke the function defined in the _call property which basically is the name of a function defined in the Lua script.
• Upon return, validate return value and take some action (described above)

Function Arguments

Return Values

Each callback must return three values:

For functional examples of this interface, please refer to the code samples provided in the source code of the project located here: