Docker Book

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Notes for upcoming book on Docker and PHP.

Installing Docker

  • Point to instructions on Docker website, no point in duplicating these
  • Make sure you are running the latest version
  • Use upstream repositories as the distribution ones are too out of date
  • If running Ubuntu, use LTS as the host

Hello World

  • docker run --rm hello-world
  • Include example output for checking
  • Explain use of --rm flag - without this we end up with lots of stopped but not removed images

Basic PHP example

  • docker run --rm php:7.4-apache-buster php -v, show output

Dockerfile:

 FROM php:7.4-apache-buster
 COPY index.php /var/www/html/index.php

index.php:

 <?php phpinfo();
  • docker build -t phpinfo:latest .
  • docker run --rm -p 8000:80 phpinfo
  • Visit localhost:8000 in browser
  • Ctrl+C terminates container and Docker will remove it automatically due to the --rm flag