GELF Encoder

The JSON (GELF) encoder rewrites parsed message as JSON objects, fully compatible with the GELF specification.

This encoder can be selected in the output section of the configuration file:

[output]
type = "gelf"

Before the rewrite, additional key/value pairs can be added, or existing entries can be overridden. This can be used to add authentication tokens that have to be kept secret from client applications.

A [output.gelf_extra] section can be present in the configuration file to enable this feature:

[output.gelf_extra]
x-auth-token = "deadbeef"
another-token = "secret"

Values for these extra fields are assumed to be strings.