Docker For PHP Dev Environments

A blueprint for how to set up fast, representative, no-fuss PHP dev environments using Docker.

Presented at @phpminds in Nottingham on 12th October 2017.

Transcript

1. A presentation by @stuherbert
 for @GanbaroDigital Docker For Dev Envs Containers For PHP App Development
2. @GanbaroDigital Why?
3. @GanbaroDigital PHP Dev Env Blueprint
4. @GanbaroDigital vs
5. @GanbaroDigital I’m sharing my experience using VMs and then containers over the last 15+ years.
6. @GanbaroDigital Your experience may be different.
7. @GanbaroDigital I am here to learn from you too!
8. @GanbaroDigital Please Do Ask Questions!
9. @GanbaroDigital Why?
10. @GanbaroDigital ?? ?? Who Currently Uses Virtual Machines For Dev Environments?
11. @GanbaroDigital This has been a long journey for me.
12. @GanbaroDigital 1999/2000 VMWare Workstation
13. @GanbaroDigital 1999/2000 2008 VMWare Workstation VMWare ESX
14. @GanbaroDigital 1999/2000 2008 2010 VMWare Workstation VMWare ESX Linux KVM
15. @GanbaroDigital 1999/2000 2008 2010 2012 VMWare Workstation VMWare ESX Linux KVM VirtualBox & Vagrant
16. @GanbaroDigital 1999/2000 2008 2010 2012 2015 VMWare Workstation VMWare ESX Linux KVM VirtualBox & Vagrant Docker Containers
17. @GanbaroDigital 2018
18. @GanbaroDigital A search for improved stability, performance, and scalability.
19. @GanbaroDigital ?? ?? Why Do We Use Virtual Machines For Dev Environments?
20. @GanbaroDigital $
21. @GanbaroDigital http://localhost:8080/route/to/page?… $
22. @GanbaroDigital The web changed everything.
23. @GanbaroDigital We went from maintaining software to creating software.
24. @GanbaroDigital We went from developers per project to projects per developer.
25. @GanbaroDigital
26. @GanbaroDigital http://172.16.0.2/route/to/page?… $ Virtual Machine
27. @GanbaroDigital
28. @GanbaroDigital http://localhost/route/to/page?… $ Virtual Machine
29. @GanbaroDigital
30. @GanbaroDigital
31. @GanbaroDigital http://172.16.0.2/route/to/page?… $ Virtual Machine
32. @GanbaroDigital http://172.16.0.2/route/to/page?… $ Virtual Machine Virtual Machine Virtual Machine Virtual Machine
33. @GanbaroDigital
34. @GanbaroDigital
35. @GanbaroDigital http://172.16.0.2/route/to/page?… $ Virtual Machine Virtual Machine Virtual Machine Virtual Machine
36. @GanbaroDigital http://172.16.0.2/route/to/page?… $ Container Container Container Container
37. @GanbaroDigital Containers Are Lightweight At Runtime
38. @GanbaroDigital Containers Scale Better Than VMs
39. @GanbaroDigital Containers Are Fast* * on Linux!
40. @GanbaroDigital Containers Are Much Easier To Build
41. @GanbaroDigital
42. @GanbaroDigital “ Container Images Are A Unit of Delivery
43. @GanbaroDigital After two years of doing all my dev work in containers … … I’m never going back to developing in VMs.
44. @GanbaroDigital PHP Dev Env Blueprint
45. @GanbaroDigital
46. @GanbaroDigital
47. @GanbaroDigital Docker Compose (has no logo - sorry) (ships with Docker for Mac) (separate download on Linux)
48. @GanbaroDigital $ docker network create
49. @GanbaroDigital dnsmasq
50. @GanbaroDigital
51. @GanbaroDigital https://hub.docker.com/r/ganbarodigital/
52. @GanbaroDigital
53. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
54. @GanbaroDigital Step 1
55. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
56. @GanbaroDigital
57. @GanbaroDigital
58. @GanbaroDigital $ docker network create 
 --subnet 172.19.0.0/24 appdev
59. @GanbaroDigital $ docker network create 
 --subnet 172.19.0.0/24 appdev
60. @GanbaroDigital $ docker network create 
 --subnet 172.19.0.0/24 appdev
61. @GanbaroDigital $ docker network create 
 --subnet 172.19.0.0/24 appdev
62. @GanbaroDigital 172.19.0.0/24
63. @GanbaroDigital Step 2
64. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
65. @GanbaroDigital 172.19.0.0/24
66. @GanbaroDigital myapp my-project
67. @GanbaroDigital docker-appenv myapp my-project
68. @GanbaroDigital docker-compose.yaml docker-appenv myapp my-project
69. @GanbaroDigital
70. @GanbaroDigital docker-appenv myapp my-project
71. @GanbaroDigital docker-appenv myapp my-project
72. @GanbaroDigital docker-appenv network-lead config data logs
73. @GanbaroDigital
74. @GanbaroDigital $ docker-compose start network-lead
75. @GanbaroDigital
76. @GanbaroDigital network-lead 172.19.0.2 172.19.0.0/24
77. @GanbaroDigital $ ping 172.19.0.2
78. @GanbaroDigital Step 3
79. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
80. @GanbaroDigital network-lead 172.19.0.2 172.19.0.0/24
81. @GanbaroDigital $ ping 172.19.0.2
82. @GanbaroDigital $ ping network-lead.appdev
83. @GanbaroDigital dnsmasq
84. @GanbaroDigital Multi-Resolver O/S Support 1. Ubuntu 16.04 - supported by default 2. Ubuntu 17.04 - install & config required 3. MacOS - supported by default
85. @GanbaroDigital /etc/NetworkManager/dnsmasq.d/ appdev.conf (on Ubuntu)
86. @GanbaroDigital server=/appdev/172.19.0.2
87. @GanbaroDigital server=/appdev/172.19.0.2
88. @GanbaroDigital server=/appdev/172.19.0.2
89. @GanbaroDigital network-lead 172.19.0.2 172.19.0.0/24
90. @GanbaroDigital Reboot to make sure new config is picked up.
91. @GanbaroDigital /etc/resolver/appdev (on MacOS)
92. @GanbaroDigital /etc/resolver/appdev (on MacOS)
93. @GanbaroDigital nameserver 172.19.0.2
94. @GanbaroDigital network-lead 172.19.0.2 172.19.0.0/24
95. @GanbaroDigital Out of the box, Docker for Mac needs an extra step. I’ll cover that separately at the end.
96. @GanbaroDigital $ ping network-lead.appdev
97. @GanbaroDigital
98. @GanbaroDigital Setting up DNS is a one-off task per Docker network
99. @GanbaroDigital Step 4
100. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
101. @GanbaroDigital The hard work is done :)
102. @GanbaroDigital
103. @GanbaroDigital docker-appenv network-lead config data logs
104. @GanbaroDigital docker-appenv mysql config data logs
105. @GanbaroDigital
106. @GanbaroDigital Acid test for container design #1 Will you lose anything if you destroy the container?
107. @GanbaroDigital I’ll tackle container image design in a separate talk.
108. @GanbaroDigital $ docker-compose start mysql
109. @GanbaroDigital network-lead mysql 172.19.0.2 172.19.0.3 172.19.0.0/24
110. @GanbaroDigital
111. @GanbaroDigital $ mysql -h mysql.appdev -u root -p
112. @GanbaroDigital You can use MySQL Workbench from the host OS too. Or any other tools. It’s just MySQL after all.
113. @GanbaroDigital Step 5
114. @GanbaroDigital Steps 1. Create a network for our dev env 2. Define our dev env 3. Get DNS working for our dev env 4. Add a database server 5. Add our app
115. @GanbaroDigital
116. @GanbaroDigital
117. @GanbaroDigital docker-appenv myapp my-project
118. @GanbaroDigital docker-appenv myapp my-project
119. @GanbaroDigital
120. @GanbaroDigital
121. @GanbaroDigital $ docker-compose start myapp
122. @GanbaroDigital
123. @GanbaroDigital network-lead mysql myapp wordpress 172.19.0.2 172.19.0.3 172.19.0.4 172.19.0.5 172.19.0.0/24
124. @GanbaroDigital PDO: mysql:host=mysql;charset=UTF8
125. @GanbaroDigital
126. @GanbaroDigital vs
127. @GanbaroDigital The differences are important to PHP developers.
128. @GanbaroDigital
129. @GanbaroDigital
130. @GanbaroDigital
131. @GanbaroDigital There *is* a workaround (of sorts) https://github.com/docker/for-mac/issues/ 155#issuecomment-320509769
132. @GanbaroDigital Maxed-out 2016 MacBook Pro vs an UltraBook running Linux
133. @GanbaroDigital It’s hardly a fair fight.
134. @GanbaroDigital A B 0 32 64 96 128 160
135. @GanbaroDigital Linux MacOS 0 32 64 96 128 160
136. @GanbaroDigital Docker for Mac has performance bottlenecks compared to Docker on Linux
137. @GanbaroDigital
138. @GanbaroDigital
139. @GanbaroDigital Containers Are A Linux-Native Technology
140. @GanbaroDigital Containers Are Not Native To MacOS
141. @GanbaroDigital On MacOS containers run in a virtual machine
142. @GanbaroDigital On MacOS Docker isn’t a seamless experience (yet)
143. @GanbaroDigital I switched to Linux for all my dev work. Because that’s where the best Docker experience is.
144. Thank You Any Questions? A presentation by @stuherbert
 for @GanbaroDigital
145. @GanbaroDigital Image Credits 1. Docker Logo:
 https://www.docker.com/brand-guidelines 2. Brigadier Mk3: https://flic.kr/p/jB4t16 3. Container Wall: https://flic.kr/p/fMsCgA 4. Container Ship: https://flic.kr/p/SGHmdX
146. @GanbaroDigital Image Credits 1. Brick Wall: https://flic.kr/p/wCRJZ4 2. Single Tortoise: https://flic.kr/p/wBEFaf 3. Multiple Tortoises: https://flic.kr/p/RxXZag 4. Isolation: https://flic.kr/p/pQnn9e
147. @GanbaroDigital Image Credits 1. Data Center: https://flic.kr/p/4Fnm8M