Hands-on

Hands-on 1

Write the compose.yaml file for the following Docker CLI inserting the depends_on condition on db health check

Exercise detailsSolution

docker network create wordpress_net
docker volume create db_data
docker volume create wp_data
docker container run --name db \
  --network wordpress_net \
  -v db_data:/var/lib/mysql \
  -e MYSQL_ROOT_PASSWORD=somewordpress \
  -e MYSQL_USER=wordpress_user \
  -e MYSQL_PASSWORD=wordpress_password \
  -e MYSQL_DATABASE=wordpress_database \
  --restart always \
  --health-cmd="mysqladmin ping --silent" \
  --health-interval=10s \
  --health-start-period=10s \
  --health-timeout=10s \
  --health-retries=60 \
  --restart always \
  -d \
  mariadb:10.6.4-focal

docker run --name wp \
  --network wordpress_net \
  -v wp_data:/var/www/html \
  -p 8080:80 \
  -e WORDPRESS_DB_HOST=db \
  -e WORDPRESS_DB_USER=wordpress_user \
  -e WORDPRESS_DB_PASSWORD=wordpress_password \
  -e WORDPRESS_DB_NAME=wordpress_database \
  -d \
  wordpress

services:
  db:
    image: mariadb:10.6.4-focal
    volumes:
      - db_data:/var/lib/mysql
    environment:
      - MYSQL_ROOT_PASSWORD=somewordpress
      - MYSQL_USER=wordpress_user
      - MYSQL_PASSWORD=wordpress_password
      - MYSQL_DATABASE=wordpress_database
    restart: always
    healthcheck:
      test: "mysqladmin ping --silent"
      interval: 10s
      start_period: 10s
      timeout: 10s
      retries: 60

  wp:
    image: wordpress:latest
    volumes:
      - wp_data:/var/www/html
    ports:
      - 8080:80
    environment:
      - WORDPRESS_DB_HOST=db
      - WORDPRESS_DB_USER=wordpress_user
      - WORDPRESS_DB_PASSWORD=wordpress_password
      - WORDPRESS_DB_NAME=wordpress_database
    restart: always
    depends_on:
      db:
        condition: service_healthy

volumes:
  db_data:
  wp_data:

Hands-on 2

Write the compose.yaml file that builds the following Dockerfile and uses it

Exercise detailsSolution 1Solution 2Solution 3

base-image: jupyter/minimal-notebook
python module to install: pandas, numpy
expose port: 8888
command: /opt/conda/bin/python3.11 /opt/conda/bin/jupyter-lab \
            --no-browser \
            --allow-root \
            --NotebookApp.token='' \
            --NotebookApp.password=''

Jupyter notebook to test the configuration

import pandas as pd
output_path = 'my_output.csv'

data = {
    'apples': [3, 2, 0, 1], 
    'oranges': [0, 3, 7, 2]
}
df = pd.DataFrame(data)

df.to_csv(output_path)

cat > requirements.txt << EOF
pandas
numpy
EOF

cat > Dockerfile << EOF
FROM jupyter/minimal-notebook
COPY requirements.txt /requirements.txt
RUN pip install -r /requirements.txt
EOF

cat > compose.yaml << EOF
services:
  my_jupyter:
    build: .
    ports:
      - 8888:8888
    command: /opt/conda/bin/python3.11 /opt/conda/bin/jupyter-lab --no-browser --allow-root --NotebookApp.token='' --NotebookApp.password=''
EOF

# To execute the application run:
# docker compose up

cat > requirements.txt << EOF
pandas
numpy
EOF

cat > Dockerfile << EOF
FROM jupyter/minimal-notebook
COPY requirements.txt /requirements.txt
RUN pip install -r /requirements.txt
EOF

cat > compose.yaml << EOF
services:
  my_jupyter:
    build: .
    ports:
      - 8888:8888
    command: "/opt/conda/bin/python3.11 \
              /opt/conda/bin/jupyter-lab \
                --no-browser \
                --allow-root \
                --NotebookApp.token='' \
                --NotebookApp.password='' "
EOF

# To execute the application run:
# docker compose up

cat > requirements.txt << EOF
pandas
numpy
EOF

cat > Dockerfile << EOF
FROM jupyter/minimal-notebook
COPY requirements.txt /requirements.txt
RUN pip install -r /requirements.txt
EOF

cat > compose.yaml << EOF
services:
  my_jupyter:
    build: .
    ports:
      - 8888:8888
    command: 
      - /opt/conda/bin/python3.11
      - /opt/conda/bin/jupyter-lab
      - --no-browser
      - --allow-root
      - --NotebookApp.token=''
      - --NotebookApp.password=''
EOF

# To execute the application run:
# docker compose up