log: Filter and route log messages using log paths, flags, and filters
Build log paths that route messages from sources to destinations, select messages with filters, and manage flow-control and disk buffers.
FilterX or classic filters, parsers, and rewrite rules?
FilterX replaces filters, parsers, and rewrite rules with a single typed language that can also handle nested JSON and other complex data. You don’t have to migrate: the classic blocks keep working, and you can use both in the same log path. To convert your existing configuration, see Update filters to FilterX.
Last modified October 1, 2026: Move filterx chapter higher and link it from classical pages (4a7e94c3)