Kickass Development Environments with Docker (PHPBenelux 2019)

Transcript

1. Hi #phpbnl19

2. Kickass Development Environments with Docker

3. @rawkode David McKay ◍ Developer Advocate at InfluxData ◍ Docker

   / CI / CD ◍ DevOps / SaltStack ◍ Event-Driven Systems ◍ CQRS / ES ◍ Elixir, Go, and Rust

4. Let us travel through time ...

5. My Development Environment Circa 2000 $ tree awesome-million-pound-project └── src

   ├── game.php ├── game.php.bk-david ├── game.php.bk-deano ├── main.php ├── main.php.maybe-fixed ├── main.php.bk-1999-12-02 ├── main.php.bk-1999-12-02.2 ├── player.php ├── player.php.orig └── .swp.player.php

6. My Development Production Environment Circa 2000 $ tree awesome-million-pound-project └──

   src ├── game.php ├── game.php.bk-david ├── game.php.bk-deano ├── main.php ├── main.php.maybe-fixed ├── main.php.bk-1999-12-02 ├── main.php.bk-1999-12-02.2 ├── player.php ├── player.php.orig └── .swp.player.php

7. Things eventually got better ...

8. None
9. None

10. Dev / Prod Parity

11. Eurgh, DSL Hell

12. None

13. Problems with Vagrant Slow to provision RAM intensive Really, development

    only Requires a CM tool

14. How long does your vagrant up take?

15. None

16. “ Docker allows you to package an application with all

    of its dependencies into a standardized unit for software development.

17. Docker ◍ Image Builder ◍ Virtualisation ◍ Image Delivery ◍

    Orchestration (Dev) ➔ docker build ➔ docker run ➔ docker push / pull ➔ docker-compose

18. Image Building Introducing the Dockerfile

19. (Simplified) Dockerfile for PHP FROM ubuntu:17.04 RUN apt install -y

    php-cli COPY hello.php /code WORKDIR /code ENTRYPOINT [“php”] CMD [“-v”]

20. (Simplified) Dockerfile for PHP FROM ubuntu:17.04 RUN apt install -y

    php-cli COPY hello.php /code WORKDIR /code ENTRYPOINT [“php”] CMD [“-v”]

21. (Simplified) Dockerfile for PHP FROM ubuntu:17.04 RUN apt install -y

    php-cli COPY hello.php /code WORKDIR /code ENTRYPOINT [“php”] CMD [“-v”]

22. (Simplified) Dockerfile for PHP FROM ubuntu:17.04 RUN apt install -y

    php-cli COPY hello.php /code WORKDIR /code ENTRYPOINT [“php”] CMD [“-v”]

23. (Simplified) Dockerfile for PHP FROM ubuntu:17.04 RUN apt install -y

    php-cli COPY hello.php /code WORKDIR /code ENTRYPOINT [“php”] CMD [“-v”]
24. None

25. ENTRYPOINT & CMD Explained in 20 seconds

26. ENTRYPOINT and CMD Explained in 17 seconds ... CMD [“echo”,

    “Hello”] in a Dockerfile docker run my-image == $ Hello

27. ENTRYPOINT and CMD Explained in 13 seconds ... CMD [“echo”,

    “Hello”] in a Dockerfile docker run my-image echo Goodbye == $ Goodbye

28. ENTRYPOINT and CMD Explained in 10 seconds ... ENTRYPOINT [“echo”]

    CMD [“Hello”] in a Dockerfile docker run my-image == $ Hello

29. ENTRYPOINT and CMD Explained in 7 seconds ... ENTRYPOINT [“echo”]

    CMD [“Hello”] in a Dockerfile docker run --entrypoint=”echo” my-image Woop! == $ Woop!

30. ENTRYPOINT and CMD Explained in 4 seconds ... ENTRYPOINT [“echo”]

    CMD [“Hello”] in a Dockerfile docker run --entrypoint=”echo” my-image == $
31. None

32. Docker ◍ Image Builder ◍ Virtualisation ◍ Image Delivery ◍

    Orchestration (Dev) ➔ docker build ➔ docker run ➔ docker push / pull ➔ docker-compose

33. Virtualisation Running Docker Images as Containers

34. Demo

35. Docker ◍ Image Builder ◍ Virtualisation ◍ Image Delivery ◍

    Orchestration (Dev) ➔ docker build ➔ docker run ➔ docker push / pull ➔ docker-compose

36. Orchestration (Dev) Composing Services

37. Your Super Application

38. Your Super Application

39. Docker Compose

40. docker-compose.yml version: “3”

41. docker-compose.yml version: “3” services: php: image: php:7 ports: - 80:80

    volumes: - .:/code

42. docker-compose.yml version: “3” services: php: image: php:7 … database: image:

    mariadb:latest environment: MYSQL_USERNAME: rawkode MYSQL_PASSWORD: *******

43. docker-compose.yml version: “3” services: php: image: php:7 … database: image:

    mariadb:latest environment: MYSQL_USERNAME: rawkode MYSQL_PASSWORD: *******

44. docker-compose.yml version: “3” services: php: image: php:7 healthcheck: test: nc

    -z localhost 80 depends_on: - database

45. Demo

46. Docker ◍ Image Builder ◍ Virtualisation ◍ Image Delivery ◍

    Orchestration (Dev) ➔ docker build ➔ docker run ➔ docker push / pull ➔ docker-compose

47. Tips I’ve learnt the hard way, so you don’t have

    to

48. Tips: Use Random Ports services: php: ports: - 80

49. Tips: Mindful of Network Collisions Every new docker-compose file is,

    potentially, a new docker network / bridge on your host. Eventually, you’ll get a collision docker-compose down

50. Tips: Prune docker system prune Docker CE >= 17.04

51. Tips: env_file Lots of environment variables defined inside compose.yml? Duplication?

    env_file: - some file

52. Tips: Alpine Linux Unless you need Ubuntu / Fedora, use

    Alpine Linux Ubuntu -- 130MB Alpine -- 3.99MB

53. Tips: Keep a Single Dockerfile Using MultiStage Builds, you can

    usually keep your project to a single Dockerfile FROM node AS node RUN npm install FROM php COPY --from=node assets

54. Tips: Don’t Bust Your Build Cache COPY composer.json /code RUN

    composer install COPY . /code

55. Tips: Logging ALWAYS LOG to STDOUT

56. Production Tip Mandatory Requirement --read-only

57. Warning Microservices

58. “ That which is old will be new again

59. Microservices

60. Microservices

61. Microservices

62. Microservices

63. Microservices

64. What is old will be new again Shared Kubernetes Dev

    Server

65. Microservices

66. Shared Kubernetes Dev Server Tooling Skaffold github.com/GoogleContainerTools/skaffold Draft github.com/Azure/draft Telepresence

    github.com/telepresenceio/telepresence

67. Shared Kubernetes Dev Server Tooling Istio github.com/istio/istio Linkerd linkerd/linkerd2 Consul

    Connect github.com/hashicorp/consul

68. Creating a fast Kubernetes Development Workflow Bastian Hofmann / 1140

    / Track B

69. Questions?