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TESTING.md

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Testing with Grafana OTEL LGTM Docker container

The Grafana OTEL LGTM Docker container is a container that bundles Grafana, Prometheus, Loki, Tempo and a OTEL collector into a single image for testing, development and demonstration purposes. We can use it to test LiteMon with Alloy.

Below the process is described:

1. Spin up Grafana & Prometheus

Run Grafana and Prometheus using the described container image.

docker run \
    -p 3000:3000 \
    -p 4317:4317 \
    -p 4318:4318 \
    -p 3100:3100 \
    -p 9090:9090 \
    -p 4040:4040 \
    -p 3200:3200 \
    -ti \
    grafana/otel-lgtm

2. Download and run Alloy

Alloy is the scraper that scrapes LiteMon and pushes metrics to Prometheus.

# Download & install alloy (e.g., on RHEL)
wget https://github.com/grafana/alloy/releases/download/v1.9.1/alloy-1.9.1-1.amd64.rpm
sudo yum installlocal ./alloy-1.9.1-1.amd64.rpm

# Run alloy with testing config
./alloy-linux-amd64 run ./testing/config.alloy

3. Run LiteMon

Last step is to run LiteMon to allow it to be scraped by Alloy.

cargo run

4. Open Grafana

In your web browser navigate to localhost:3000 to open the Grafana Web UI.