Docker-Compose workshop

Source code: https://github.com/rualatngua/docker-compose-workshop

Transcript

1. Docker-Compose From developer to Presented by: Khanh Tran
2. Who am i » Technology Evangelist @ GEEK Up » I'm a Hobbit, and my hobbies: » Docker & Microservice » Nightwish music Twitter: @khanhtran khanh.tq@geekup.vn
3. Agenda » Why Docker? » Why Docker-Compose? » How to setup a PhalconPHP project with docker- compose » 10 take-away tips
4. Say one more time work on my machine
7. Legacy ways to provide dev environment » README.txt » Virtual box, VMware » Vagrant (https://www.vagrantup.com)
8. Problems of legacy ways
9. Human don't read document
10. VM is BIG & SLOW
11. Conflicting libraries
12. Woody every problems has a solution
15. Demo #1
18. $ docker pull mysql:5.7 $ docker run mysql:5.7 --name db -v $(pwd)/stacks/mysql/.db:/var/lib/mysql -p 3306:3306 -e MYSQL_ROOT_PASSSWORD=123Abc $ docker build -t web . $ docker run web --link db:db -p 8080:80 ...
19. Multi-container apps are a hassle $ docker pull ... $ docker pull ... $ docker pull ... $ docker pull ... $ docker build ... $ docker build ... $ docker build ... $ docker build ... $ docker run ... $ docker run ... $ docker run ... $ docker run ...
20. Woody every problems has a solution
22. We can treat containers as
24. Docker-Compose: Get an app running in one command
25. docker-compose.yml version "2" services: nginx: image: nginx links: - web:web ports: - 80:80 web: build: src links: - db:db db: image: mysql:5.7 cache: image: redis:latest
26. Docker-Compose commands # run all containers in background $ docker-compose -f docker-compose.yml up -d # stop all containers $ docker-compose down # scale web to 3 containers $ docker-compose scale web=3 # show logs $ docker-compose logs -f
27. Demo #2
29. Tip #1: How to use volumes to store container's data services: web: volumes: - ./stacks/web/uploads:/uploads - ./stacks/web/cache:/cache db: volumes: - ./stacks/mysql/.db:/var/lib/mysql
30. Tip #2: Simplify application's configuration by using links # before 'db' => [ 'host' => get_env('DB_HOST') ] services: web: links: - db:db - cache:cache db: image: mysql:5.7 cache: image: redis # after 'db' => [ 'host' => 'db' ]
31. Tip #3: Running development tasks with Use one-off containers # Run PHP Composer $ docker run --rm composer/composer -v $(pwd):/app composer install # Migrate database $ docker-compose run devtools migrations:migrate -n # Run Bower $ docker run -v $(pwd)/src/web:/data ngtrieuvi92/nodejs-devtools bower install --allow-root
32. Tip #4: Simplify docker-compose commands by using Makefile # Makefile VERSION = 1.0 .PHONY: start dev_up composer-install bower dbmigrate start: composer-install bower dbmigrate dev_up: docker-compose up -d --remove-orphans ps: docker-compose ps dbmigrate: docker-compose run devtools migrations:migrate -n $ make dev_up $ make ps $ make dbmigrate
33. Tip #5: Mitigate remmebering to many ports by using typicode/Hotel # add domain www.topdev.dev $ hotel add http://localhost:10000 --name www.topdev # add domain www.topdev.dev $ hotel add http://localhost:10001 --name adminer.topdev $ open adminer.topdev.dev $ open www.topdev.dev
34. Tip #6: Experimental web scaling in development env. $ docker-compose scale www=3 upstream topdev_www { server topdev_www_1:8080 max_fails=1 fail_timeout=10s; server topdev_www_2:8080 max_fails=1 fail_timeout=10s; server topdev_www_3:8080 max_fails=1 fail_timeout=10s; } server { listen 80; server_name www.topdev.dev; location / { proxy_pass http://topdev_www; proxy_http_version 1.1; proxy_set_header HTTP_CLIENT_IP $remote_addr; proxy_set_header HTTP_X_FORWARDED_FOR $proxy_add_x_forwarded_for; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection 'upgrade'; proxy_set_header Host $host; proxy_ignore_headers Set-Cookie; proxy_ignore_headers Cache-Control Expires; proxy_cache_bypass $http_secret_header; } }
35. Tip #7: Mount your docker.sock Nginx-Proxy generates reverse proxy configs for nginx and reloads nginx when containers are started and stopped. version: '2' services: nginx-proxy: image: jwilder/nginx-proxy container_name: nginx-proxy ports: - "80:80" volumes: - /var/run/docker.sock:/tmp/docker.sock:ro whoami: image: jwilder/whoami container_name: whoami environment: - VIRTUAL_HOST=whoami.local $ docker-compose up $ curl -H "Host: whoami.local" localhost I'm 5b129ab83266
36. Tip #8: How to config different environment » Define per docker-compose file per environment as below: » docker-compose-dev.yml » docker-compose-test.yml » docker-compose-staging.yml » docker-compose-production.yml # Use symbol link files to define different environments $ ln -s docker-compose-dev.yml docker-compose.yml $ make dev_up
37. Tip #9: Avoid breaking change by using tagging image services: db: image: mysql:5.7 search: image: elasticsearch:2.4
38. Tip #10: Improve DevOps skill by learning from master » Let search on Docker Hub for a good docker image » Go to there Github repository and learn: » their Dockerfile » their Nginx.conf » their my.cnf » etc... » Examle: APSL/thumbor
39. Bonus: How to run two duplicated docker- compose in same machine Use project alias as prefix of service's name
40. Q&A
41. Join Us
42. Images Credit » https://knpuniversity.com/imagine/ course_video_poster_large/uploads/screencast/ composer:ec02af1c8c8b7a77403283ad7a0534e9c1037b06/ KnpU-Composer.png » http://www.mylarfoodstoragedinners.com/wp-content/ uploads/2016/03/1bf06a7.jpg » https://i.ytimg.com/vi/ucKnpvPaAeM/ maxresdefault.jpg » https://ipggi.files.wordpress.com/