Grafana Alloy Component

OpenTelemetry-compatible telemetry collector from Grafana. Collects, processes, and forwards logs, metrics, and traces to observability backends.

Architecture

                Alloy Agent - Telemetry collection (DaemonSet)

                Receivers - OTLP, Prometheus, file inputs

                Processors - Transform, filter, batch

                Exporters - Loki, Prometheus, S3

Quick Reference

Attribute	Example	Default	Effect
`namespace` REQ	`alloy`	-	Kubernetes namespace
`mode`	`daemonset`	daemonset	daemonset, deployment
`enable_logs`	`true`	true	Collect container logs
`enable_metrics`	`true`	true	Scrape Prometheus metrics

Link Variables

Variable	Link Type	Purpose
`__loki`	alloy-loki	Log destination (Loki push API)
`__prometheus`	prometheus-alloy	Metrics destination
`__prometheus_collect`	alloy-prometheus	Self-monitoring metrics
`__minio`	alloy-minio	S3 storage for logs
`__bucket`	alloy-bucket	Specific bucket destination

Pipeline Configuration

                Log Pipeline (with __loki):

                - discovery.kubernetes (pod discovery)

                - loki.source.kubernetes (log scraping)

                - loki.process (label extraction)

                - loki.write (push to Loki)

                Metrics Pipeline (with __prometheus):

                - prometheus.scrape (metrics collection)

                - prometheus.relabel (label manipulation)

                - prometheus.remote_write (push to Prometheus)

Generated Files

File	Condition	Contains
helm/helm-values.yaml	Always	Alloy Helm configuration
secret/config.alloy	Always	River configuration file

Ports

Port	Purpose	Protocol
4317	OTLP gRPC receiver	gRPC
4318	OTLP HTTP receiver	HTTP
12345	Alloy UI	HTTP

River Configuration Language

Example config.alloy:

discovery.kubernetes "pods" {
  role = "pod"
}

loki.source.kubernetes "pods" {
  targets    = discovery.kubernetes.pods.targets
  forward_to = [loki.write.default.receiver]
}

loki.write "default" {
  endpoint {
    url = "http://loki:3100/loki/api/v1/push"
  }
}

Technical Info

                Chart Version: 4.7.4

                Ports: 4317 (OTLP gRPC), 4318 (OTLP HTTP), 12345 (UI)

                Config Language: River (Grafana's HCL-like DSL)