GELF is a JSON-based, structured log format popularized by Graylog. It consists of a set of predefined event fields, such as the event timestamp, hostname, severity, and long and short messages, and supports additional custom fields for application-specific information.

GELF is one of the many log formats NXLog supports. NXLog can collect or forward logs in Graylog Extended Log Format (GELF) and has a specialized Graylog Extended Log Format (GELF) module for parsing and formatting GELF logs.

GELF, Graylog Extended Log Format, Graylog Log Format, Graylog Format

Send logs to Graylog
GELF (xm_gelf)