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Monitoring Containers with Prometheus

For the last six months, the Acme Anvil Corporation has been migrating some of their bare metal infrastructure to Docker containers. It’s time to implement some basic monitoring in the environment. You will handle this in two ways: using `Docker stats` and Prometheus. Your mission is to set up Prometheus and cAdvisor using Docker Compose. You can get more information on Prometheus at [prometheus.io](https://prometheus.io/).

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Labs

Path Info

Level
Clock icon Intermediate
Duration
Clock icon 1h 30m
Published
Clock icon Nov 07, 2018

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Table of Contents

  1. Challenge

    Create a prometheus.yml File

    In the root directory, create prometheus.yml:

    scrape_configs:
    - job_name: cadvisor
      scrape_interval: 5s
      static_configs:
      - targets:
        - cadvisor:8080
    
  2. Challenge

    Create the Prometheus Services

    Create a docker-compose.yml file:

    version: '3'
    services:
      prometheus:
        image: prom/prometheus:latest
        container_name: prometheus
        ports:
          - 9090:9090
        command:
          - --config.file=/etc/prometheus/prometheus.yml
        volumes:
          - ./prometheus.yml:/etc/prometheus/prometheus.yml
        depends_on:
          - cadvisor
        
      cadvisor:
        image: google/cadvisor:latest
        container_name: cadvisor
        ports:
          - 8080:8080
        volumes:
          - /:/rootfs:ro
          - /var/run:/var/run:rw
          - /sys:/sys:ro
          - /var/lib/docker:/var/lib/docker:ro
    

    Stand up the environment.

    docker-compose up -d
    
  3. Challenge

    Create stats.sh

    Create stats.sh in /root.

    docker stats --format "table {{.Name}} {{.ID}} {{.MemUsage}} {{.CPUPerc}}"
    

    Make sure the file can be executed.

    chmod a+x stats.sh
    

    Execute the script.

    ./stats.sh
    

    When you're finished, exit by pressing Ctrl+C.

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