Vector Remap Language (VRL)
This directory houses the Rust libraries used to power Vector Remap Language, or VRL for short. VRL is a language for transforming, routing, and filtering observability data (logs and metrics). Although VRL was originally created for use in Vector, in principle it can be used in other systems.
Libraries
Library | Purpose |
---|---|
vrl-cli |
VRL has a command-line interface that can be used either under the vector CLI (vector vrl ) or on its own via cargo run |
vrl-compiler |
The VRL compiler converts a system of VRL expressions (parsed from a VRL program) into runnable Rust code |
vrl-core |
Some core bits for the language, including the Target trait that needs to be implemented by events |
vrl-diagnostic |
Compiler and runtime error messages as well as runtime error logging |
vrl-parser |
The VRL parser uses an abstract syntax tree (AST) to convert VRL programs inside of Vector configurations into systems of expressions |
vrl-proptests |
A collection of property-based tests for VRL parser |
vrl-stdlib |
The current standard library of VRL functions |
vrl-tests |
A harness used to run a variety of test cases |
vrl |
A fully packaged version of VRL, bundling together all internal components into a public interface |