Set up Prometheus

To get started with custom monitoring with Prometheus on Docker:

1. Create a directory on the Prometheus instance called prometheus and create a prometheus.yml file in that directory.

2. Add the following contents to prometheus.yml. Replace <prometheus_endpoint> with the Prometheus endpoint.

   global:
       scrape_interval: 15s
       evaluation_interval: 15s
   
       # Attach these labels to any time series or alerts when communicating with
       # external systems (federation, remote storage, Alertmanager).
       external_labels:
           monitor: "prometheus-stack-monitor"
   
   # Load and evaluate rules in this file every 'evaluation_interval' seconds.
   #rule_files:
   # - "first.rules"
   # - "second.rules"
   
   scrape_configs:
       # scrape Prometheus itself
       - job_name: prometheus
       scrape_interval: 10s
       scrape_timeout: 5s
       static_configs:
         - targets: ["localhost:9090"]
   
       # scrape Redis Cloud
       - job_name: redis-cloud
       scrape_interval: 30s
       scrape_timeout: 30s
       metrics_path: /  # For v2, use /v2
       scheme: https
       static_configs:
         - targets: ["<prometheus_endpoint>:8070"]
   

3. Create a docker-compose.yml file with instructions to set up the Prometheus and Grafana Docker images.

   version: '3'
   services:
       prometheus-server:
           image: prom/prometheus
           ports:
               - 9090:9090
           volumes:
               - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
   
       grafana-ui:
           image: grafana/grafana
           ports:
               - 3000:3000
           environment:
               - GF_SECURITY_ADMIN_PASSWORD=secret
           links:
               - prometheus-server:prometheus
   

4. To start the containers, run:

   $ docker compose up -d
   

5. To check that all the containers are up, run: docker ps

6. In your browser, sign in to Prometheus at http://localhost:9090 to make sure the server is running.

7. Select Status and then Targets to check that Prometheus is collecting data from the Redis Cloud cluster.

   

   If Prometheus is connected to the cluster, you can type node_up in the Expression field on the Prometheus home page to see the cluster metrics.