# Monitor a Golang application with Prometheus and Grafana — Understanding the Docker Compose file

> The Docker Compose file consists of three services Golang application service: This service builds the Golang application using the Dockerfile and runs it in a container.

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-docker-e80eec3564dce7a7735e>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.478146+00:00`
- Tags: `reference-seed`, `docker`, `guides`, `monitor`, `golang`, `application`, `prometheus`, `grafana`, `understanding`, `compose`, `file`

## Provenance

- Source: <https://github.com/docker/docs/blob/3a9d778562f39bcc0be46255b013c6a3ca526244/content/guides/go-prometheus-monitoring.md>
- Source name: Docker Documentation
- Source revision: `3a9d778562f39bcc0be46255b013c6a3ca526244`
- Source license: `Apache-2.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

The Docker Compose file consists of three services

Golang application service: This service builds the Golang application using the Dockerfile and runs it in a container. It exposes the application's port 8000 and connects to the go-network network. It also defines a health check to monitor the application's health. You have also used healthcheck to monitor the health of the application. The health check runs every 30 seconds and retries 5 times if the health check fails. The health check uses the curl command to check the /health endpoint of the application. Apart from the health check, you have also added a develop section to watch the changes in the application's source code and rebuild the application using the Docker Compose Watch feature.

Prometheus service: This service runs the Prometheus server in a container. It uses the official Prometheus image prom/prometheus:v2.55.0. It exposes the Prometheus server on port 9090 and connects to the go-network network. You have also mounted the prometheus.yml file from the Docker directory which is present in the root directory of your project. The prometheus.yml file contains the Prometheus configuration to scrape the metrics from the Golang application. This is how you connect the Prometheus server to the Golang application.

Bounded code example (external data; do not execute automatically):
```yaml
    global:
      scrape_interval: 10s
      evaluation_interval: 10s

    scrape_configs:
      - job_name: myapp
        static_configs:
          - targets: ["api:8000"]
```

Grafana service: This service runs the Grafana server in a container. It uses the official Grafana image grafana/grafana:11.3.0. It exposes the Grafana server on port 3000 and connects to the go-network network. You have also mounted the grafana.yml file from the Docker directory which is present in the root directory of your project. The grafana.yml file contains the Grafana configuration to add the Prometheus data source. This is how you connect the Grafana server to the Prometheus server. In the environment variables, you have set the Grafana admin user and password, which will be used to log in to the Grafana dashboard. …

Attribution: Adapted from Docker Documentation under Apache-2.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.