Kickass Development Environments with Docker (PHPBenelux 2019)

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 ...
10. Dev / Prod Parity
11. Eurgh, DSL Hell
13. Problems with Vagrant Slow to provision RAM intensive Really, development only Requires a CM tool
14. How long does your vagrant up take?
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”]
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 == $
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?