Skip to main content

cAdvisor

cAdvisor (Container Advisor) is a container monitoring tool developed by Google that collects, aggregates, processes, and exports information about running containers. To send your Prometheus cAdvisor metrics to a Logz.io Infrastructure Monitoring account, use remote write to connect to Logz.io as the endpoint.

Before you begin​

These are the prerequisites you’ll need before you can begin:

  • Docker and Docker Compose installed on your machine.
  • Logz.io account

Create a Prometheus configuration file​

Navigate to your application directory or create a new one. In this directory, create a prometheus.yml file with the following content:

global:
  scrape_interval: 15s
  external_labels:
    monitor: 'docker-monitor'

scrape_configs:
  - job_name: 'cadvisor'
    static_configs:
      - targets: ['cadvisor:8080']

remote_write:
  - url: "https://<<LISTENER-HOST>>:8053"
    bearer_token: "<<PROMETHEUS-METRICS-SHIPPING-TOKEN>>"
    remote_timeout: 30s
    queue_config:
      batch_send_deadline: 5s
      max_shards: 10
      min_shards: 1
      max_samples_per_send: 500
      capacity: 10000

Replace the placeholders to match your specifics. (They are indicated by the double angle brackets << >>):

  • Replace <<LISTENER-HOST>> with the Logz.io Listener URL for your region, configured to use port 8052 for http traffic, or port 8053 for https traffic.
  • Replace <<PROMETHEUS-METRICS-SHIPPING-TOKEN>> with a token for the Metrics account you want to ship to. Look up your Metrics token.

Create a Docker Compose file​

In the same directory, create a docker-compose.yml file with the following content:

version: '3.7'

services:
  prometheus:
    image: prom/prometheus:latest
    volumes:
      - ./prometheus.yml:/etc/prometheus/prometheus.yml
    command:
      - '--config.file=/etc/prometheus/prometheus.yml'
    ports:
      - 9090:9090

  cadvisor:
    image: gcr.io/cadvisor/cadvisor:latest
    volumes:
      - /:/rootfs:ro
      - /var/run:/var/run:ro
      - /sys:/sys:ro
      - /var/lib/docker/:/var/lib/docker:ro
    ports:
      - 8080:8080

Run the setup​

From your application directory, run:

docker-compose up -d

Verify the setup​

To verify that your metrics are being sent correctly:

  1. Open your browser and go to http://localhost:9090 to access the Prometheus UI.
  2. In the Prometheus UI, run a query for prometheus_remote_storage_samples_in_total. You should see metrics if everything is set up correctly.

Check Logz.io for your metrics​

Give your data some time to get from your system to ours, then log in to your Logz.io Metrics account, and open the Logz.io Metrics tab.