How To Put Your Docker Image On A Diet

Talk given at PHP South Wales

Transcript

1. PUT YOUR DOCKER IMAGE ON A DIET @PFWD @HowToCodeWell
2. SELF TAUGHT DOCKER DEV IF YOU SEE AN IMPROVEMENT PLEASE LET ME KNOW WE ARE ALL LEARNING ALL THE TIME @PFWD @HowToCodeWell
3. PHP 7.4 RC 1 SYMFONY 4.3.6 APACHE 2 WEB SERVER ORIGINAL 1.09GB AFTER DIET 171 MB @PFWD @HowToCodeWell
4. @PFWD @HowToCodeWell
5. WHY | WHAT | HOW @PFWD @HowToCodeWell
6. PETER FISHER BSC MBSC HOW TO CODE WELL
7. @PFWD @HowToCodeWell
8. WHY | WHAT | HOW @PFWD @HowToCodeWell
9. SPEED | SECURITY | SANITY | SCALABILITY @PFWD @HowToCodeWell
10. SPEED THE LIGHTER THE IMAGE THE FASTER THE DEVELOPMENT @PFWD @HowToCodeWell
11. SPEED THE LIGHTER THE IMAGE THE FASTER THE DEPLOYMENT @PFWD @HowToCodeWell
12. SPEED THE LIGHTER THE IMAGE THE FASTER THE DISTRIBUTION @PFWD @HowToCodeWell
13. SECURITY THE SMALLER THE IMAGE THE SMALLER THE ATTACK SURFACE @PFWD @HowToCodeWell
14. SECURITY DO NOT BAKE SECURITY CREDS INTO YOUR IMAGES @PFWD @HowToCodeWell
15. SANITY THE SMALLER THE IMAGE THE LESS YOU HAVE TO MAINTAIN @PFWD @HowToCodeWell
16. SANITY THE SMALLER THE IMAGE THE MORE CONTROL YOU HAVE @PFWD @HowToCodeWell
17. SANITY THE SMALLER THE IMAGE THE QUICKER YOU CAN SPOT PROBLEMS @PFWD @HowToCodeWell
18. SANITY THE SMALLER THE IMAGE THE LESS RESPONSIBILITY IT HAS @PFWD @HowToCodeWell
19. SCALEABILITY THE SMALLER THE IMAGE THE QUICKER IT CAN INSTALL @PFWD @HowToCodeWell
20. SCALEABILITY THE SMALLER THE IMAGE THE QUICKER TO EXPAND @PFWD @HowToCodeWell
21. SCALEABILITY THE SMALLER THE IMAGE THE QUICKER TO CONTRACT @PFWD @HowToCodeWell
22. SCALEABILITY THE SMALLER THE IMAGE THE QUICKER TO REUSE @PFWD @HowToCodeWell
23. WHY | WHAT | HOW @PFWD @HowToCodeWell
24. WHAT IS THE DIFFERENCE BETWEEN A DOCKER CONTAINER AND A VIRTUAL MACHINE? @PFWD @HowToCodeWell
25. @PFWD @HowToCodeWell
26. VIRTUALIZATION != CONTAINERIZATION @PFWD @HowToCodeWell
27. VIRTUALIZATION = IS A HOUSE @PFWD @HowToCodeWell
28. CONTAINERIZATION = IS A ROOM @PFWD @HowToCodeWell
29. DIFFERENT LEVELS OF ABSTRACTION @PFWD @HowToCodeWell
30. BOTH SOLVE DIFFERENT PROBLEMS @PFWD @HowToCodeWell
31. BOTH SHOULD BE USED DIFFERENTLY @PFWD @HowToCodeWell
32. VIRTUALIZATION CUSTOM ENVIRONMENT ALLOCATED RESOURCES ECOSYSTEM @PFWD @HowToCodeWell
33. CONTAINIZATION SINGLE PROCESS SINGLE RESPONSIBILITY SINGLE PURPOSE @PFWD @HowToCodeWell
34. WHAT IS A DOCKER IMAGE ANYWAY? @PFWD @HowToCodeWell
35. WHAT IS A DOCKER IMAGE ANYWAY? ANSWER: A FILE MADE FROM MANY LAYERS WHICH
 CREATES A CONTAINER @PFWD @HowToCodeWell
36. CONTAINERS ARE BUILT FROM IMAGES @PFWD @HowToCodeWell
37. WHAT IS A DOCKER IMAGE MADE FROM? @PFWD @HowToCodeWell
38. WHAT IS A DOCKER IMAGE ANYWAY? ANSWER: MANY DIFFERENT IMAGES @PFWD @HowToCodeWell
39. WHAT IS A DOCKER FILE? @PFWD @HowToCodeWell
40. WHAT IS A DOCKER FILE? ANSWER: A SERIES OF INSTRUCTIONS THAT
 BUILD A DOCKER IMAGE @PFWD @HowToCodeWell
41. WHY | WHAT | HOW @PFWD @HowToCodeWell
42. VERSION 1.0.0 1.09 GB @PFWD @HowToCodeWell
43. VERSION 1.0.0 1.09 GB @PFWD @HowToCodeWell
44. 26 BUILD STEPS 18 RUN INSTRUCTIONS VERSION 1.0.0 1.09 GB @PFWD @HowToCodeWell
45. 10 BUILD STEPS VERSION 1.1.0 1.06 GB @PFWD @HowToCodeWell
46. MULTIPLE CONTAINER RESPONSIBILITIES VERSION 1.1.0 1.06 GB @PFWD @HowToCodeWell
47. REMOVED MULTIPLE CONTAINER REPSONSIBILTES MYSQL-SERVER MYSQL-CLIENT RABBITMQ-SERVER VERSION 1.2.0 708MB @PFWD @HowToCodeWell
48. DO NOT VERSION 1.2.0 708MB @PFWD @HowToCodeWell
49. REMOVED PHP-7.4-* VERSION 1.3.0 449MB @PFWD @HowToCodeWell
50. WRONG BASE IMAGE VERSION 1.3.0 449MB @PFWD @HowToCodeWell
51. VERSION 1.4.0 601MB USE PHP APACHE BASE IMAGE @PFWD @HowToCodeWell
52. VERSION 1.5.0 485MB @PFWD @HowToCodeWell
53. VERSION 1.6.0 478MB DON’T INSTALL
 RECOMENDED PACKAGES —no-install-recommends @PFWD @HowToCodeWell
54. VERSION 1.7.0 444MB MULTI STAGE DOCKER BUILD 3 STAGES! @PFWD @HowToCodeWell
55. DEV PACKAGES SHOULD BE FOR DEV NOT FOR PROD! @PFWD @HowToCodeWell
56. VERSION 1.8.0 424MB MULTI STAGE DOCKER BUILD 5 STAGES! 2 TARGETS NO DEV PACKAGES IN STAGING STAGING HAS AUTOLOADER DUMPED @PFWD @HowToCodeWell
57. VERSION 1.9.0 171MB ALPINE IMAGES DECOUPLING PHP FROM APACHE @PFWD @HowToCodeWell
58. VERSION 1.9.0 88.5MB USE PHP FPM PHP AND APACHE ARE IN 2 CONTAINERS @PFWD @HowToCodeWell
59. VERSION 1.9.0 PHP 88.5MB APACHE 171MB ER… HOW? @PFWD @HowToCodeWell
60. VERSION 1.9.0 PHP 88.5MB APACHE 171MB PROXY PHP REQUESTS TO THE PHP CONTAINER @PFWD @HowToCodeWell
61. VERSION 1.9.0 PHP 88.5MB APACHE 171MB 1) USE THE PHP SERVICE NAME 2) NETWORK APACHE AND PHP 3) SHARE THE SITE VOLUME @PFWD @HowToCodeWell
62. VERSION 1.9.0 PHP 88.5MB APACHE 171MB 1) USE THE PHP SERVICE NAME 2) NETWORK APACHE AND PHP 3) SHARE THE SITE VOLUME @PFWD @HowToCodeWell
63. Version Size 1.0.0 1.0.9 GB 1.1.0 1.0.6 GB Reduced build steps 1.2.0 708 MB Removed other responsibilities 1.3.0 449 MB Removed unknown PHP packages (php7.4-*) 1.4.0 601 MB Changed the base image 1.5.0 485 MB Removed package and composer cache 1.6.0 478 MB Didn’t install recommend packages 1.7.0 444 MB Used Multi Stage Docker Images 1.8.0 424 MB Removed dev composer packages 1.9.0 171 MB - Apache 88 MB - PHP Separated Apache and PHP @PFWD @HowToCodeWell
64. Peter Fisher BSC MBSC GITHUB https://github.com/pfwd/how-to-put- your-docker-image-on-a-diet Version 1.0.0 $ docker-compose up -d --build Grab a ☕ @PFWD @HowToCodeWell
65. Peter Fisher BSC MBSC THANK YOU QUESTIONS? LET ME KNOW WHAT YOU THINK! @PFWD @HowToCodeWell