Monitor components
Alloy components may optionally expose Prometheus metrics which can be used to investigate the behavior of that component. These component-specific metrics are only generated when an instance of that component is running.
Component-specific metrics are different than any metrics being processed by the component. Component-specific metrics are used to expose the state of a component for observability, alerting, and debugging.
Component-specific metrics are exposed at the /metrics HTTP endpoint of the Alloy HTTP server, which defaults to listening on http://localhost:12345.
The documentation for the
alloy runcommand describes how to modify the address Alloy listens on for HTTP traffic.
Component-specific metrics have a component_id label matching the component ID generating those metrics.
For example, component-specific metrics for a prometheus.remote_write component labeled production will have a component_id label with the value prometheus.remote_write.production.
The reference documentation for each component described the list of component-specific metrics that the component exposes. Not all components expose metrics.
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