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PHP UserGroup Hamburg - 2016-02-09 - Dockerizing PHP Applications

Following some notes about my the last php usergroup meetup.

By Sebastian Heuer

  • docker is not one tool but a whole ecosystem
    • machine (provisioning)
    • swarm (clustering and container scheduling)
    • compose (multi container application)
    • registry (image distribution)
    • engine (the container)
    • ktematic (gui)
  • pretty small compared to virtual box/full virtual machines
  • updating means, building a new container
  • theoretically, you can use all the images from the hub
    • always ask yourself if you want to use them in production
      • are they maintained
      • how secure are they
  • docker compose
    • builds and pulls images
    • runs containers
    • enables networking between containers
    • aggregates STDOUT and STDERR output

example Dockerfile

FROM php:7.0.2-fpm

RUN docker-php-ext-install pdo pdo_mysql

COPY php/php.ini /usr/local/etc/php/
# copy the content of the source code into the image
# you can ship this code version now
COPY . /srv/meetup-service

# the date in the container is not persistent
# if ypu change something in it, it will bill lost afterwards

CMD ["php-fpm"]

example docker-compose.yml

webserver:
  build: ./nginx    #path to the docker file and configuration etc
  links:
    - application
  ports:
    - "80:80"   #from port 80 to port 80
  volumesfrom:
    - application
application:
  build: ./meetup-service   #your project
  links:
    - database
  ports:
    - "9000:9000"
  volumes:
    - ./meetup-service:/srv/meetup-service  #mounting local source code into the container
  environment:
    - MYSQLHOST=database
    - MYSQLDATABASE=application
    - MYSQLUSER=root
    - MYSQLPASSWORD=parola
database:
  image: mysql:5.7  #no build path, instead an image is used
  volumes:
    - /var/lib/mysql
  ports:
    - "3306:3306"
  environment:
    - MYSQLROOTPASSWORD=docker
    - MYSQLDATABASE=app

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