Slides from my Docker workshop at PHPCon 2016. From a simple docker run command through own images and Dockerfiles to docker-compose setup supporting scalable app testing on local environment

1. DOCKERFROM DEVELOPMENT ENV TO
SCALABLE CLOUD APPLICATION

2. DOCKER
3 HOURS
ONE 10-MINUTE BREAK
QUESTIONS AFTER EACH PART

3. DOCKER
DOCKER INTERNALS
DOCKER BASICS
DOCKERFILE
DOCKER-COMPOSE
SCALING
DOCKER CLUSTERS

4. DOCKER
MICHAŁ KURZEJA
▸ CTO at accesto.com
▸ michal@accesto.com
▸ @michalKurzeja

6. WHY
DOCKER?

8. DOCKER
SYSTEM DEPENDENCIES

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

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

11. DOCKER
PROJECT DEPENDENCY MATRIX FROM HELL
Dev Stage Prod CI
PHP ? ? ? ?
MySQL ? ? ? ?
Redis ? ? ? ?
RabbitMQ ? ? ? ?
Neo4j ? ? ? ?
Hadoop/
Spark
? ? ? ?

12. DOCKER
PROJECT DEPENDENCY MATRIX FROM HELL
Dev Stage Prod CI
PHP ? ?
MySQL ? ? ?
Redis ? ? ? ?
RabbitMQ ? ? ? ?
Neo4j ? ? ? ?
Hadoop/
Spark
? ? ? ?

13. PROFITS?

14. BUILD ONCE,
EXECUTE
EVERYWHERE*

15. NO DEPENDENCY
& NO INCOMPATIBILITY
ISSUES

16. VM WITHOUT
OVERHEAD

17. FULLY
AUTOMATED

18. EASY
TO DEPLOY*

19. SEPARATION
OF DUTIES

20. SCALABILITY*

21. HUGE
COMMUNITY

23. TECHNICAL
BACKGROUND

24. IMAGE

25. IMAGE LAYER

27. imagelayers.io

28. CONTAINER

29. REGISTRY

30. DOCKER HUB

31. DOCKER
VIRTUAL MACHINES VS CONTAINERS

32. DOCKER
WHY IS DOCKER FAST?

37. LET’S PLAY
A GAME!
Let me know if you have any issues!

38. DOCKER
PREREQUISITES
▸ Git
▸ Docker
▸ Docker-compose
▸ Linux prefered
▸ OSX -> Docker for Mac
▸ Windows -> Docker for Windows :/

39. https://github.com/accesto/docker-workshop

40. docker run
firecyberice/whalesay
"PHP rocks"

41. docker run
firecyberice/whalesay
"PHP rocks"

42. docker run
firecyberice/whalesay
"PHP rocks"

43. DOCKER
IMAGE NAME
▸ name #official image
▸ vendor/name
▸ name:tag #official image with tag
▸ vendor/name:tag

44. docker run
firecyberice/whalesay
"PHP rocks"

46. docker ps -a
?

47. docker run -v $PWD:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

48. docker run -v $PWD:/app
-p 8082:80 #local:container
php:5.6-apache

49. docker run -v $PWD:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

51. READY TO
DIVE DEEPER?

52. OWN
DOCKER IMAGE

53. DOCKERFILE

54. META
MAINTAINER
LABEL
EXPOSE
VOLUME
ARG

55. BASICS
FROM
RUN
ADD
COPY
ENV

56. EXECUTION
CMD
ENTRYPOINT
USER
WORKDIR

57. AND MORE…
SHELL
HEALTHCHECK
STOPSIGNAL
ONBUILD
.DOCKERIGNORE

58. EXAMPLE?

59. FROM firecyberice/whalesay:latest
Dockerfile

60. FROM firecyberice/whalesay:latest
ADD fortune.sh /usr/bin/
Dockerfile

61. Dockerfile
FROM firecyberice/whalesay:latest
ADD fortune.sh /usr/bin/
RUN chmod +x /usr/bin/fortune.sh

62. Dockerfile
FROM firecyberice/whalesay:latest
ADD fortune.sh /usr/bin/
RUN chmod +x /usr/bin/fortune.sh
ENTRYPOINT /usr/bin/fortune.sh | cowsay
docker build -t accesto/docker-whale .

63. Dockerfile
FROM firecyberice/whalesay:latest
ADD fortune.sh /usr/bin/
RUN chmod +x /usr/bin/fortune.sh
ENTRYPOINT /usr/bin/fortune.sh | cowsay
docker build -t accesto/docker-whale .

69.
docker run accesto/docker-whale
Dockerfile

71. EVERYTHING IN ONE CONTAINER ?

72. MOAR CONTAINERS!

73. DOCKER
COMPOSE
(CONTAINER ORCHESTRATION)

74. docker run -v $PWD/www:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

75. docker run -v $PWD/www:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7X

76. docker run www
docker run mariadb
docker run redis
?

77. docker run www
docker run mariadb
docker run redis
?X

78. #docker-compose.yml
www:
image: webdevops/php-apache:alpine-3-php7
docker run -v $PWD/www:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

79. #docker-compose.yml
www:
image: webdevops/php-apache:alpine-3-php7
volumes:
- ./www:/app
docker run -v $PWD/www:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

80. #docker-compose.yml
www:
image: webdevops/php-apache:alpine-3-php7
volumes:
- ./www:/app
ports:
- 8082:80
docker run -v $PWD/www:/app
-p 8082:80
webdevops/php-apache:alpine-3-php7

81. #docker-compose.yml
www:
image: webdevops/php-apache:alpine-3-php7
volumes:
- ./www:/app
ports:
- 8082:80
DOCKER-COMPOSE UP

83. LINKING
CONTAINERS

84. WWW REDIS

85. www:
image: webdevops/php-apache:…
volumes:
- ./www:/app
ports:
- 8082:80
redis:
image: redis:alpine

86. www:
image: webdevops/php-apache:…
volumes:
- ./www:/app
ports:
- 8082:80
links:
- redis
redis:
image: redis:alpine

87. <?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;

88. docker-compose up -d
docker-compose ps

89. MANY
CONFIGURATION
POSSIBILITIES
CHECK OUT DOCKER-COMPOSE FILE REFERENCE

90. SCALING
APPLICATIONS

91. FILE SYSTEM
ABSTRACTION

92. CENTRALIZED
LOGS

93. SESSION

94. EXTERNAL
SERVICES

95. DATABASE

96. 12FACTOR.NET

97. WWW REDIS
WWW
WWW
…
HAPROXY

98. version: '2'
services:
www:
image: webdevops/….
volumes:
- ./www:/app
ports:
- 8082:80
links:
- redis
redis:
image: redis:alpine

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

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

101. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
links:
- www
ports:
- '8082:80'
redis: …

102. version: '2'
services:
www: …
haproxy:
image: 'dockercloud/haproxy:latest'
links:
- www
ports:
- '8082:80'
volumes:
- /var/run/docker.sock:/var/run/docker.sock
redis: …

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

105. DEPLOYMENT

106. PRACTICES -
DEVELOPMENT

107. USE
COMPOSE

108. SHARE
SOURCES

109. MULTIPLE
CONTAINERS

110. USE
VERY SPECIFIC
IMAGE TAGS

111. OWN
DOCKER FILE
AND REPOSITORY

112. INHERIT
FROM
PRODUCTION

113. PRACTICES -
PRODUCTION

114. SHARE
SOURCES
DON’T
(USE COPY)

115. AUTOMATE
DEPLOYMENT
(ANSIBLE, PUPPET, CHEF, ….)

116. KEEP
IT SMALL

117. PRODUCTION VS DEVELOPMENT
LET THEM BE
DIFFERENT
USE INHERITANCE

118. PRACTICES -
DOCKERFILE

119. USE ENV
VARIABLES

120. ADD INIT.D
SCRIPTS SUPPORT

121. REMOVE
GARBAGE FILES

122. CHANGE
USER

123. DEEPER?

124. DOCKER SWARM
MESOSPHERE
KUBERNETES
AMAZON

125. RANCHER

126. CHALLENGE
ACCEPTED?

127. QUESTIONS?