Docker Workshop - Speaker Deck

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WORKSHOP Rafael Dutra

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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

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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

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AGENDA ● What’s Docker? ● Container vs Virtual Machine ● Why should I use Docker? ● Terminology ● Images and Layers ● Containers and Layers ● Dockerfile anatomy

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WHAT'S DOCKER? ● Open Source technology ● Agility, accelerate software development and deployment ● Portability, eliminate the "works on my machine" ● Container is not Virtual Machine

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CONTAINER VS VIRTUAL MACHINES

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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

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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

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IMAGES AND LAYERS

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CONTAINERS AND LAYERS

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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;"]

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HANDS ON

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HANDS ON AGENDA ● Docker installation ● The basics, running containers ● Interacting with containers ● Dockerfile ● Using volumes ● Docker Compose

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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

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DOCKER BASICS Full commands docker

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DOCKER BASICS Need a medic? ask for help docker --help

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DOCKER BASICS Running our first container docker run alpine hostname

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DOCKER BASICS Running our second container docker run hello-world

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DOCKER BASICS Everything comes from an image docker run alpine hostname

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DOCKER BASICS To list all images docker image ls

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DOCKER BASICS To search an image docker search alpine

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DOCKER BASICS To pull (download) an image docker image pull ubuntu

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DOCKER BASICS To pull (download) an specific image version docker image pull ubuntu:17.10

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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

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MANIPULATE CONTAINERS To list running containers docker container ls

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MANIPULATE CONTAINERS To list all containers docker container ls -a

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MANIPULATE CONTAINERS Stopping a container docker container stop

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MANIPULATE CONTAINERS Starting a container docker container start

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MANIPULATE CONTAINERS Interacting with them docker run --interactive --tty ubuntu /bin/bash

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MANIPULATE CONTAINERS Executing …. something without enter in a container docker exec

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MANIPULATE CONTAINERS Attaching. important: Containers needs some “bash/sh” running docker attach

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MANIPULATE IMAGES To remove an image Important: Only containers removed docker image rm alpine

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CREATING IMAGES (Dockerfile) FROM php:7.2.5-cli-alpine3.7 CMD ["php", "--version"]

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CREATING IMAGES docker build --tag fossday/php:7.2 .

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RUN FORREST … RUN docker run --rm fossday/php:7.2

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RUN FORREST … RUN docker run --rm fossday/php:7.2 --help

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RUN FORREST … RUN WITH MATH

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RUN FORREST … RUN docker run --rm \ -v $(pwd)/soma.php:/root/soma.php \ fossday/php:7.2 \ php -f /root/soma.php

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CLEANING Remove all containers that are in stopped state (dangling) docker container prune

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DOCKER COMPOSE ● Orchestrate containers ● YAML ● Single file: docker-compose.yaml ● Multi containers

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DOCKER COMPOSE INSTALLATION https://goo.gl/8mbW87

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DOCKER COMPOSE docker-compose up -d

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QUESTIONS ? HERE WE GO

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GET IN TOUCH https://rafaeldutra.me https://docker.rafaeldutra.me https://linkedin.com/in/rafaeldutra @raffaeldutra [email protected] https://github.com/raffaeldutra https://speakerdeck.com/raffaeldutra

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THANK YOU SEE YOU LATER