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Repository: admin/monitoring-stack Timestamp: 2025-04-19_22-18-01 Target directory: projects/monitoring-stack
91 lines
3.4 KiB
Markdown
91 lines
3.4 KiB
Markdown
# Prometheus-Grafana Monitoring Stack
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This repository contains a Docker Compose setup for a complete monitoring solution using Prometheus and Grafana, with additional exporters for system and container metrics, and **Loki/Promtail for log aggregation and analysis**.
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## Components
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- **Prometheus**: Time series database and monitoring system
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- **Grafana**: Visualization and dashboarding tool
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- **Loki**: Log aggregation system that integrates with Grafana
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- **Promtail**: Log shipper for Loki (collects system and container logs)
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- **Node Exporter**: Collects hardware and OS metrics from the host
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- **cAdvisor**: Collects container metrics
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- **CPU Temperature Exporter**: Custom exporter for CPU temperature metrics
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## Directory Structure
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```
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prometheus-grafana/
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├── cpu-temp-prometheus-exporter/ # Custom exporter for CPU temperature
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│ └── main.js # Node.js script that exposes CPU temp metrics
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├── prometheus/ # Prometheus configuration
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│ └── prometheus.yml # Main Prometheus configuration file
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├── promtail/ # Promtail configuration
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│ └── config.yml # Main Promtail configuration file
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├── grafana/ # Promtail configuration
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│ └── provisioning # Main Promtail configuration file
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│ └── datasources
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│ └── loki.yml # Provision Loki datasource on Grafana
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└── docker-compose.yml # Docker Compose configuration file
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```
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## Setup Instructions
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1. Clone this repository
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2. (Optional) Modify `prometheus/prometheus.yml` to adjust scrape targets
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3. Update the CPU temperature exporter target IP in `prometheus.yml` if needed
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4. Deploy the stack:
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```
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docker-compose up -d
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```
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## CPU Temperature Exporter
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The CPU temperature exporter is a simple Node.js script that exposes the highest CPU core temperature. This script should be run directly on the host machine (not in a container) using:
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```
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/usr/bin/js cpu-temp-prometheus-exporter/main.js
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```
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It exposes metrics on port 8084, which Prometheus is configured to scrape.
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## Log Aggregation with Loki & Promtail
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Promtail is configured to:
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- Collect logs from `/var/log/syslog`
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- Collect container logs from `/var/lib/docker/containers`
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- Send them to the Loki service
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Loki is exposed on port **3100** and integrates with Grafana for log visualization.
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## Recommended Dashboards
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Import these dashboards into Grafana for comprehensive monitoring:
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- [Node Exporter Full](https://grafana.com/grafana/dashboards/1860-node-exporter-full/)
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- [cAdvisor Exporter](https://grafana.com/grafana/dashboards/14282-cadvisor-exporter/)
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- **System & Docker Logs** (included logs-dashboard.json JSON file in this repo)
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## Dashboard Import Instructions
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1. In Grafana, go to Dashboards > Import
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2. Enter the dashboard ID (1860 for Node Exporter Full, 14282 for cAdvisor)
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3. Upload the included JSON dashboard for logs
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4. Select your Prometheus or Loki data source
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5. Click Import
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## Default Ports
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- Prometheus: 9090
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- Grafana: 3000
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- Loki: 3100
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- Node Exporter: 9100
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- cAdvisor: 8080
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- CPU Temperature Exporter: 8084
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## Notes
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- Grafana's default login is admin/admin
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- CPU temperature metrics will appear as `server_cpu_temp` in Prometheus
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- Make sure the host running the CPU temperature exporter has the `sensors` command available
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