Docker based Web development

This is my introductory talk on Docker that I gave on 6th WordPress meetup in Novi Sad in StartIt center.

https://www.meetup.com/WP-Meetup-NS/events/236189966

The story about the docker is just too complex to be covered up with a single 30 minute talk, so I gave an overview on virtualization technologies and how is the docker positioned there.

Included in presentation, I showed practically how easy it is to start a container once the docker application is installed.

It enables both Windows and Mac to have seamless development integration of PHP, web server and database but also Linux would benefit from isolation of environments for different projects.

Get the docker here: https://www.docker.com/

Once installed, check WordPress quick start here https://docs.docker.com/compose/wordpress/

Just follow that quick start and you will be up and running in no time ;)

If you wish to discuss matters with me, you may wait for another live presentation or catch me somewhere online, I'm easy to find and always in a good mood for a discussion on any matter.

Transcript

1. THE THEORY OF EVERYTHING
   AND VERY BRIEFLY ABOUT DOCKER IN 

   WORDPRESS DEVELOPMENT
   Mladen Đurić
   @macmladen
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2. Mladen Đurić
   @MacMladen
   2
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3. DOCKER 4 WORDPRESS
   IN DEVELOPMENT & PRODUCTION
   Mladen Đurić
   @macmladen
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4. MLADEN ĐURIĆ
   a.k.a MacMladen
   • in IT since the time of mainframes,
   8th year in UNIX epoch (that’s 1978).
   • started with Z80 assembly, went over
   6502 to 8086 (1978-1990)
   • somewhere in between, there was an
   episode with BASIC but really enjoyed
   hard core C
   • was knee deep in DTP 1990-2000
   • gone to Mac in 1995 and never looked
   back
   • 2005 started playing with web
   technologies with WPMU but figured
   out it is not flexible enough
   • 2007 landed on Drupal
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5. WPMU ?!
   Mladen Đurić
   @macmladen
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6. TIMETABLE:
   1. The Problem ~5 min
   2. The Virtualization ~5 min
   3. The Docker ~10 min
   4. The Solution ~10 min
   5. Q & A: 10 min or more
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7. 7
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8. 8
   WHEN IN ROME,

   DO AS THE ROMANS DO
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   ‘I no longer craziest developer. Lol.’
   

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9. Chapter 1.
   THE PROBLEM
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10. …JUST ONE?!
    1. System setup - for development
    2. Project setup - matching production
    3. Quick fix of the old one - matching what was
    4. Project setup - for a colleague
    5. Project weirdos - matching production
    6. Project requirements - one is 5.3 other 5.6, and 7.1…
    7. System upgrade - what the !#$%&%$ happened to ___
    8. Testing - would that work under…
    9. Archiving - I know what I did last summer but before that..!?
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11. Chapter 2.
    THE VIRTUALIZATION
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12. TYPES OF
    VIRTUALIZATION
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    Full virtualization
    almost as a physical machine
    Hypervisor
    runs different OSes
    Isolation
    runs OSes on same kernel
    

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13. FULL VIRTUALIZATION
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14. HYPERVISOR
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15. CONTAINERIZATION
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16. CONTAINERIZATION
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17. CONTAINERIZATION
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18. Chapter 2.
    THE DOCKER
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19. INSTALLATION
    19
    Docker Engine is supported on Cloud, Linux. Windows and Mac OS have native
    docker application.
    wget -qO- https://get.docker.com/ | sh docker –version
    Docker is treated like other services.
    sudo service docker status

    sudo service docker start
    Test the installation using this code
    sudo docker run ubuntu:14.04 /bin/echo 'Hello world'
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20. INSTALLATION
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21. https://hub.docker.com/
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22. docker
    22
    sudo docker run -d -p 8080:80 --name apache --link
    mysql:mysql -v /var/www/html:/var/www/html jessecascio/
    local:apache
    # verify the two containers are running, and link exists
    sudo docker ps
    sudo docker inspect -f "{{ .HostConfig.Links }}" apache
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23. Dockerfile
    23
    The Apache Dockerfile can look like this.
    FROM ubuntu:14.04
    RUN apt-get update
    RUN apt-get install -y apache2
    RUN apt-get install -y php5 php5-common php5-cli php5-mysql
    php5-curl
    EXPOSE 80
    CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]
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24. docker-compose
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    version: '2'

    

    services:

    db:

    image: mysql:5.7

    volumes:

    - db_data:/var/lib/mysql

    restart: always

    environment:

    MYSQL_ROOT_PASSWORD: wordpress

    MYSQL_DATABASE: wordpress

    MYSQL_USER: wordpress

    MYSQL_PASSWORD: wordpress

    

    wordpress:

    depends_on:

    - db

    image: wordpress:latest

    ports:

    - "8000:80"

    restart: always

    environment:

    WORDPRESS_DB_HOST: db:3306

    WORDPRESS_DB_PASSWORD: wordpress

    volumes:

    db_data:
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    The official docker-compose.yml for WordPress looks like this:
    

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25. docker and docker-compose commands
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    docker controls individual containers by name or ID while docker-compose controls a group of
    containers, usually called application or stack.
    Usual Docker commands:
    docker ps -a — lists all docker containers, running, paused and stopped.
    docker inspect mcidev_nginx_1 — lists all details about the container by name or ID
    docker stats --no-stream — shows resource usage, omit --no-stream to have live stats
    docker-compose up -d — while in directory structure containing docker-compose.yml, creates
    and starts application.
    docker-compose pull — fetch latest version of containers.
    docker-compose stop — stops application
    docker-compose start — starts application
    docker-compose restart — restarts application
    docker-compose down — remove containers (instance of contaners images)
    

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26. Chapter 3.
    THE SOLUTION
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27. 27
    Mladen Đurić
    @macmladen
    Q & A
    DOCKER4WORDPRESS
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28. THANKS!
    DOCKER4WORDPRESS
    Mladen Đurić
    @macmladen
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