Docker Workshop

Introdução de como iniciar com containers Docker.

- Comandos básicos
- Dockerfile
- Gerenciamento de containers
- Rodando uma "aplicação" em CLI (Command Line Interface) com PHP
- Docker Compose

Transcript

1. WORKSHOP Rafael Dutra
2. WHO AM I? • Rafael Dutra • SysAdmin and DevOps Enthusiast • Security Information - UNISINOS 2008 - ? • Linux user since 2005 • Docker user since 2015 • PHP (Laravel)/Shell/Ruby
3. WORKING WITH/AT Vagrant, Puppet, Terraform, Continuous Integration, Continuous Deployment, Shell Scripting, Docker, AWS (learning) ... Shared Services Ops Team @crossover - https://crossover.com @jivesoftware - https://jivesoftware.com @aurea - https://www.aurea.com
4. AGENDA • What’s Docker? • Container vs Virtual Machine • Why should I use Docker? • Terminology • Images and Layers • Containers and Layers • Dockerfile anatomy
5. WHAT'S DOCKER? • Open Source technology • Agility, accelerate software development and deployment • Portability, eliminate the "works on my machine" • Container is not Virtual Machine
6. CONTAINER VS VIRTUAL MACHINES
7. WHY SHOULD I USE DOCKER? • Infrastructure as Code - IAC • All application is an image • Works on my machine, no more! • Set up locally the same environment that you have in production, or any other environment • Tests, a lot of them • Community
8. TERMINOLOGY • Images = is our “how it was built” / what we want to run • Containers = runs images in a dynamic way. By dynamic I meant: multiple containers can run the same image doing different things. • Volumes = where we want to store our data, could be our physical directory or a docker volume
9. IMAGES AND LAYERS
10. CONTAINERS AND LAYERS
11. DOCKERFILE # base image FROM nginx # copy a file to a specific directory COPY index.html /usr/share/nginx/html # running the application CMD ["nginx", "-g", "daemon off;"]
12. HANDS ON
13. HANDS ON AGENDA • Docker installation • The basics, running containers • Interacting with containers • Dockerfile • Using volumes • Docker Compose
14. DOCKER INSTALLATION • Ubuntu: https://goo.gl/YFDkpv • Debian: https://goo.gl/T6pmJd curl -fsSL https://get.docker.com -o get-docker.sh sudo sh get-docker.sh
15. DOCKER BASICS Full commands docker
16. DOCKER BASICS Need a medic? ask for help docker <command> --help
17. DOCKER BASICS Running our first container docker run alpine hostname
18. DOCKER BASICS Running our second container docker run hello-world
19. DOCKER BASICS Everything comes from an image docker run alpine hostname
20. DOCKER BASICS To list all images docker image ls
21. DOCKER BASICS To search an image docker search alpine
22. DOCKER BASICS To pull (download) an image docker image pull ubuntu
23. DOCKER BASICS To pull (download) an specific image version docker image pull ubuntu:17.10
24. DOCKER BASICS Running our first web container docker run --detach --publish 45000:80 nginx • action that we want to do • options to detach (run it in background) and publish ports • port that we want to access in our machine • port running in the container • image we are using at this moment
25. MANIPULATE CONTAINERS To list running containers docker container ls
26. MANIPULATE CONTAINERS To list all containers docker container ls -a
27. MANIPULATE CONTAINERS Stopping a container docker container stop <id>
28. MANIPULATE CONTAINERS Starting a container docker container start <id>
29. MANIPULATE CONTAINERS Interacting with them docker run --interactive --tty ubuntu /bin/bash
30. MANIPULATE CONTAINERS Executing …. something without enter in a container docker exec <id> <command>
31. MANIPULATE CONTAINERS Attaching. important: Containers needs some “bash/sh” running docker attach <id>
32. MANIPULATE IMAGES To remove an image Important: Only containers removed docker image rm alpine
33. CREATING IMAGES (Dockerfile) FROM php:7.2.5-cli-alpine3.7 CMD ["php", "--version"]
34. CREATING IMAGES docker build --tag fossday/php:7.2 .
35. RUN FORREST … RUN docker run --rm fossday/php:7.2
36. RUN FORREST … RUN docker run --rm fossday/php:7.2 --help
37. RUN FORREST … RUN WITH MATH <?php $val1 = 60; $val2 = 20; echo "Soma de ${val1} + ${val2} igual a: " . ($val1 + $val2) . "\n"; Lets create a file called: soma.php
38. RUN FORREST … RUN docker run --rm \ -v $(pwd)/soma.php:/root/soma.php \ fossday/php:7.2 \ php -f /root/soma.php
39. CLEANING Remove all containers that are in stopped state (dangling) docker container prune
40. DOCKER COMPOSE • Orchestrate containers • YAML • Single file: docker-compose.yaml • Multi containers
41. DOCKER COMPOSE INSTALLATION https://goo.gl/8mbW87
42. DOCKER COMPOSE docker-compose up -d
43. QUESTIONS ? HERE WE GO
44. GET IN TOUCH https://rafaeldutra.me https://docker.rafaeldutra.me https://linkedin.com/in/rafaeldutra @raffaeldutra raffaeldutra@gmail.com https://github.com/raffaeldutra https://speakerdeck.com/raffaeldutra
45. THANK YOU SEE YOU LATER