Prometheus

Write data

Configure

We use Prometheus node_exporter as an example to collect data. To do this, create a file named prometheus.yml and copy the following content into it.

global:
  scrape_interval: 10s # The default is every 1 minute.
  evaluation_interval: 10s # The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: "node"
    static_configs:
      - targets: ["node_exporter:9100"]

remote_write:
  - url: http://greptimedb:4000/v1/prometheus/write?db=public

The configuration sets the remote_write URL to the Greptime URL and sets the interval for collecting metrics to 10 seconds. The host greptimedb in the URL is the service name of GreptimeDB in the Docker network.

Start Services

We use Docker Compose to start GreptimeDB, Prometheues, node_exporter and Grafana. To do this, create a docker-compose.yml file with the following content:

services:
  grafana:
    image: grafana/grafana-oss:<%grafana-version%>
    container_name: grafana
    ports:
      - 3000:3000

  greptime:
    image: greptime/greptimedb:<%greptimedb-version%>
    container_name: greptimedb
    ports:
      - 4000:4000
      - 4001:4001
      - 4002:4002
      - 4003:4003
    command: "standalone start --http-addr 0.0.0.0:4000 --rpc-addr 0.0.0.0:4001 --mysql-addr 0.0.0.0:4002 --postgres-addr 0.0.0.0:4003"
    volumes:
      - ./greptimedb:/tmp/greptimedb

  prometheus:
    image: prom/prometheus:<%prometheus-version%>
    container_name: prometheus
    depends_on:
      - node_exporter
    ports:
      - 9090:9090
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro

  node_exporter:
    image: quay.io/prometheus/node-exporter:<%node-exporter-version%>
    container_name: node_exporter_local
    ports:
      - 9100:9100
    command:
      - '--path.rootfs=/'

networks: {}

Then run the following command:

docker-compose up

After every service starts successfully, the host metrics will be collected and sent to GreptimeDB.

Visualize Data with Grafana

Next Steps