[TP] Hands-on: Collecting and Dispatching Logs to Loki


Set up an alloy loki pipeline to collect local logs, transform them via loki process, and send them to Loki.

What you will learn in this TP :

Introduction

The goal of this lab is to configure Grafana Alloy to read local log files, add context labels, and send them to a Grafana Loki instance.

Log Pipeline

We will configure the blocks composing the pipeline in River language.
  1. 1. Log Source
    Add configuration to discover and read `/var/log/myapp/*.log` files.
  2. 2. Log Processing
    Add a processing block to dynamically add an `env=production` label to all collected log lines.
  3. 3. Dispatching to Loki
    Configure sending logs to a Loki instance available at `http://localhost:3100`.

Difficulty level: (2/5)

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Course Glossary

Grafana Alloy

An open-source, vendor-neutral telemetry collector designed to replace Grafana Agent, fully compatible with OpenTelemetry (OTel).