An introduction to Docker and docker-compose. Starting from single docker run commands we discover docker file basics, docker-compose basics and finally we play around with scaling containers in docker-compose.

1. DOCKERINTRODUCTION TO CONTAINERS FOR
PHP DEVELOPERS

2. DOCKER - INTRODUCTION FOR PHP DEVELOPERS
MICHAŁ KURZEJA
▸ CTO at accesto.com
▸ michal@accesto.com
▸ @michalKurzeja
▸ Homebrewer
▸ Swimmer/runner

4. WHY
DOCKER?

6. DOCKER
SYSTEM DEPENDENCIES

7. DOCKER
SYSTEM DEPENDENCIES
PROJECT 1
PROJECT 2
PROJECT 3
* M

8. DOCKER
SYSTEM DEPENDENCIES
Developer 1
Tester
Developer 2
CI
Staging
* N

9. DOCKER - INTRODUCTION FOR PHP DEVELOPERS
PROJECT DEPENDENCY MATRIX FROM HELL
Dev Stage Prod CI
PHP ? ? ? ?
MySQL ? ? ? ?
Redis ? ? ? ?
RabbitMQ ? ? ? ?
Neo4j ? ? ? ?
Hadoop/
Spark
? ? ? ?

10. DOCKER - INTRODUCTION FOR PHP DEVELOPERS
PROJECT DEPENDENCY MATRIX FROM HELL
Dev Stage Prod CI
PHP ? ?
MySQL ? ? ?
Redis ? ? ? ?
RabbitMQ ? ? ? ?
Neo4j ? ? ? ?
Hadoop/
Spark
? ? ? ?

11. PROFITS?

12. BUILD ONCE,
EXECUTE
EVERYWHERE*

13. NO DEPENDENCY
& NO INCOMPATIBILITY
ISSUES

14. VM WITHOUT
OVERHEAD

15. FULLY
AUTOMATED

16. EASY
TO DEPLOY

17. SEPARATION
OF DUTIES

18. SCALABILITY

19. TECHNICAL
BACKGROUND

20. TEKST
VIRTUAL MACHINES VS CONTAINERS

21. TEKST
WHY IS DOCKER FAST?

22. IMAGE

23. IMAGE LAYER

24. imagelayers.io

25. CONTAINER

26. REPOSITORY

27. DOCKER HUB

28. DEMO TIME!

29. docker run docker/whalesay cowsay PHP!

30. docker run docker/whalesay cowsay PHP!

31. docker run docker/whalesay cowsay PHP!

32. docker run docker/whalesay cowsay PHP!

34. docker run -v $PWD:/var/www/html
-p 8081:80
php:5.6-apache

35. docker run -v $PWD:/var/www/html
-p 8081:80
php:5.6-apache

36. docker run -v $PWD:/var/www/html
-p 8081:80
php:5.6-apache 7.0-apache

39. READY TO
DIVE DEEPER?

40. OWN
DOCKER IMAGE

41. FROM docker/whalesay:latest
Dockerfile

42. FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
Dockerfile

43. FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
CMD /usr/games/fortune -a | cowsay
Dockerfile

44. FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
CMD /usr/games/fortune -a | cowsay
docker build -t docker-whale .
Dockerfile

45. FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
CMD /usr/games/fortune -a | cowsay
docker build -t docker-whale .
Dockerfile

46. FROM docker/whalesay:latest
RUN apt-get -y update && apt-get install -y fortunes
CMD /usr/games/fortune -a | cowsay
docker build -t docker-whale .
docker run docker-whale
Dockerfile

51. EVERYTHING IN ONE CONTAINER ?

52. MULTIPLE CONTAINERS!

53. DOCKER
COMPOSE

54. docker run -v $PWD/www:/var/www/html
-p 8081:80
php:7.0-apache

55. docker run -v $PWD/www:/var/www/html
-p 8081:80
php:7.0-apacheX

56. #docker-compose.yml
www:
image: php:7.0-apache
docker run -v $PWD/www:/var/www/html
-p 8081:80
php:7.0-apache

57. #docker-compose.yml
www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
docker run -v $PWD/www:/var/www/html
-p 8081:80
php:7.0-apache

58. #docker-compose.yml
www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
ports:
- 8081:80
docker run -v $PWD/www:/var/www/html
-p 8081:80
php:7.0-apache

59. #docker-compose.yml
www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
ports:
- 8081:80
docker-compose up

61. LINKING
CONTAINERS

62. WWW REDIS

63. www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
ports:
- 8081:80
redis:
image: redis

64. www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
ports:
- 8081:80
links:
- redis
redis:
image: redis

65. <?php
/* www/index.php */
require_once __DIR__.'/vendor/autoload.php';
$client = new PredisClient(['host' => 'redis']);
$counter = $client->incr('counter');
echo "Hostname: ".gethostname().PHP_EOL;
echo " Counter: ".$counter.PHP_EOL;

66. docker-compose ps

67. SCALING
APPLICATIONS

68. WWW REDIS
WWW
WWW
…
HAPROXY

69. version: '2'
services:
www:
image: php:7.0-apache
volumes:
- ./www:/var/www/html
ports:
- 8081:80
links:
- redis
redis:
image: redis

70. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
redis: …

71. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
links:
- www
redis: …

72. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
links:
- www
ports:
- '80:80'
redis: …

73. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
links:
- www
ports:
- '80:80'
environment:
- DOCKER_TLS_VERIFY
- DOCKER_HOST
- DOCKER_CERT_PATH
volumes:
- $DOCKER_CERT_PATH:$DOCKER_CERT_PATH
redis: …

74. docker-compose up -d
docker-compose scale www=3
docker-compose ps

76. DEEPER?

77. DOCKER SWARM
MESOSPHERE
KUBERNETES

78. DOCKER
PACKAGING OWN APPLICATIONS
▸ Use Dockerfile
▸ COPY project code
▸ Orchestrate [with compose]
▸ Split into multiple containers

79. DOCKER
DEPLOYMENT TIPS&TRICKS
▸ Own in-house docker repository
▸ No direct disk usage
▸ Gaufrette - filesystem abstraction
▸ Logstash - logs
▸ Session in redis/memcached

80. CHALLENGE
ACCEPTED?

81. QUESTIONS?