Caution
Grafana Agent has reached End-of-Life (EOL) on November 1, 2025. Agent is no longer receiving vendor support and will no longer receive security or bug fixes. Current users of Agent Static mode, Agent Flow mode, and Agent Operator should proceed with migrating to Grafana Alloy. If you have already migrated to Alloy, no further action is required. Read more about why we recommend migrating to Grafana Alloy.
This is documentation for the next version of Grafana Agent Documentation. For the latest stable release, go to the latest version.
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.
