Prometheus for Docker monitoring - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Prometheus container with the official image.

Docker

docker run -d --name prometheus [1] prom/prometheus

Drag options to blanks, or click blank then click option'

A-p 9090:9090

B-p 8080:8080

C-p 3000:3000

D-p 80:80

Attempts:

3 left

💡 Hint

Common Mistakes

Mapping the wrong port like 8080 or 3000 which are not Prometheus default ports.

Forgetting to expose any port so you can't access Prometheus UI.

The Prometheus server listens on port 9090 by default, so we map port 9090 from the container to the host.

2fill in blank

medium

Complete the command to mount a local Prometheus configuration file into the container.

Docker

docker run -d --name prometheus -p 9090:9090 -v [1]:/etc/prometheus/prometheus.yml prom/prometheus

Drag options to blanks, or click blank then click option'

A/etc/prometheus/prometheus.yml

B/var/lib/prometheus/data

C/home/user/prometheus.yml

D/home/user/data

Attempts:

3 left

💡 Hint

Common Mistakes

Mounting a directory instead of the config file.

Using the wrong local path that does not exist.

You need to mount your local Prometheus config file (e.g., /home/user/prometheus.yml) to the container's expected config path.

3fill in blank

hard

Fix the error in the Prometheus scrape config to monitor Docker metrics.

Docker

scrape_configs:
  - job_name: 'docker'
    static_configs:
      - targets: ['[1]']

Drag options to blanks, or click blank then click option'

Alocalhost:9100

Blocalhost:2375

Clocalhost:8080

Dlocalhost:9090

Attempts:

3 left

💡 Hint

Common Mistakes

Using the Prometheus port 9090 as a target.

Using node exporter port 9100 which is unrelated to Docker metrics.

Docker metrics are exposed on the Docker daemon API port 2375 (if enabled). Prometheus scrapes this target.

4fill in blank

hard

Fill both blanks to configure Prometheus to scrape metrics from Docker and node exporter.

Docker

scrape_configs:
  - job_name: 'docker'
    static_configs:
      - targets: ['[1]']
  - job_name: 'node'
    static_configs:
      - targets: ['[2]']

Drag options to blanks, or click blank then click option'

Alocalhost:2375

Blocalhost:9100

Clocalhost:9090

Dlocalhost:8080

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up ports for Docker and node exporter.

Using Prometheus port 9090 as a scrape target.

Docker metrics come from port 2375, node exporter metrics come from port 9100.

5fill in blank

hard

Fill all three blanks to create a Docker Compose service for Prometheus with port mapping and config volume.

Docker

services:
  prometheus:
    image: prom/prometheus
    ports:
      - '[1]:9090'
    volumes:
      - '[2]:/etc/prometheus/prometheus.yml'
    command:
      - '--config.file=[3]'

Drag options to blanks, or click blank then click option'

A9090

B/home/user/prometheus.yml

C/etc/prometheus/prometheus.yml

Dprometheus.yml

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong port numbers or paths.

Not specifying the config file path in the command.

Map host port 9090 to container 9090, mount local config file, and tell Prometheus where the config file is inside the container.