Menu
Caution
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.
Open source
Expressions
Expressions represent or compute values you can assign to attributes within a configuration.
Basic expressions are literal values, like "Hello, world!"
or true
.
Expressions may also do things like refer to values exported by components, perform arithmetic, or call functions.
You use expressions when you configure any component. All component arguments have an underlying type. River checks the expression type before assigning the result to an attribute.
Was this page helpful?
Related resources from Grafana Labs
Additional helpful documentation, links, and articles:
Video
GrafanaCON 2024 Keynote Recap
Catch up on GrafanaCON 2024 highlights! Explore Grafana 11 features, LGTM Stack innovations, and community achievements in this recap webinar.
Video
Getting started with the Grafana LGTM Stack
In this webinar, we’ll demo how to get started using the LGTM Stack: Loki for logs, Grafana for visualization, Tempo for traces, and Mimir for metrics.
Video
Getting started with Grafana dashboard design
In this webinar, you'll learn how to design stylish and easily accessible Grafana dashboards that tell a story.