Grafana Alloy is the new name for our distribution of the OTel collector. Grafana Agent has been deprecated and is in Long-Term Support (LTS) through October 31, 2025. Grafana Agent will reach an End-of-Life (EOL) on November 1, 2025. Read more about why we recommend migrating to Grafana Alloy.

Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

Open source

Standard library

Grafana Agent Flow is still growing, and its standard library isn’t mature yet. If you have a request for extensions to the standard library, please leave feedback on our dedicated GitHub discussion for River feedback.

The standard library is a list of functions which can be used in expressions when assigning values to attributes.

All standard library functions are idempotent: they will always return the same output if given the same input.