GDGSCL - Docker a jeho provoz v Heroku a AWS

DockerBuild, Ship and Run

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Ladislav Prskavec

4 Twitter: @abtris

4 Blog: http://blog.prskavec.net

4 Site Reliability Engineer (SRE)in Apiary.io

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What's Docker?

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Analogyfrom

logistics

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Goods, wares

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Containers

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Why Docker?

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Fastand

scalableGDG Spaghetti Code Liberec, 6.10.2015 9

Build once,run anywhere

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Configure once, run anywhere

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Example of using Docker4 build documentation in Sphinx with latex

support

4 executing code in many different programming languages without requiring a single compiler or script interpreter on your machine - docker exec

4 running gui app in docker at linux

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Example of using Docker4 development without install ing many

tools at local machine

4 Vagrant, Otto dev

4 continues integration using docker

4 Jenkins, TravisCI, CircleCI

4 DevOps platform for build, deploy and manage apps across any cloud - Tutum

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Docker Engine

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Docker Engine

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VM vs Docker

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Containers and imagesdocker run hello-world

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Docker Remote API4 client & server in Docker

4 docker ps

4 docker build

4 docker push/pull

4 docker run/stop

4 docker inspect

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Docker lifecycle4 a build produces an immutable image

4 a container is as instance of the image

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Docker lifecycle

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Container lifecycle

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Dockerfile# Firefox over VNC## VERSION 0.3

FROM ubuntu

# Install vnc, xvfb in order to create a 'fake' display and firefoxRUN apt-get update && apt-get install -y x11vnc xvfb firefoxRUN mkdir ~/.vnc# Setup a passwordRUN x11vnc -storepasswd 1234 ~/.vnc/passwd# Autostart firefox (might not be the best way, but it does the trick)RUN bash -c 'echo "firefox" >> /.bashrc'

EXPOSE 5900CMD ["x11vnc", "-forever", "-usepw", "-create"]

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DockerHub

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Docker tools

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Docker compose

4 defining and running multi-container applications with Docker

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docker-compose.ymlweb: build: . ports: - "5000:5000" volumes: - .:/code links: - redisredis: image: redis

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Docker machine4 Machine lets you create Docker hosts on your computer, on cloud providers, and inside your own data center.

4 part of Docker toolbox

4 replacement for boot2docker

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Demo

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Docker swarm

4 Docker Swarm is native clustering for Docker.

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Kinematic4 desktop GUI for Docker

4 Mac and Windows only

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Docker Trusted Registry (DTR)4 private dedicated image registry

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Yours private registry4 storage at S3

docker run \ -d \ -p 5000:5000 \ --restart=always \ --name registry \ registry:2

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Open Container ekosystem 1

1 https://www.mindmeister.com/389671722/open-container-ecosystem-formerly-docker-ecosystem

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Docker at Herokuheroku plugins:install heroku-docker

4 https://gist.github.com/abtris/6aca9b2668b8b5af0208

4 app.json must contain:

{ image: heroku/nodejs }

4 app.json specification

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Dockerfile - heroku/nodejs# Inherit from Heroku's stackFROM heroku/cedar:14

# Internally, we arbitrarily use port 3000ENV PORT 3000# Which version of node?ENV NODE_ENGINE 0.12.2# Locate our binariesENV PATH /app/heroku/node/bin/:/app/user/node_modules/.bin:$PATH

# Create some needed directoriesRUN mkdir -p /app/heroku/node /app/.profile.dWORKDIR /app/user

# Install nodeRUN curl -s https://s3pository.heroku.com/node/v$NODE_ENGINE/node-v$NODE_ENGINE-linux-x64.tar.gz | \ tar --strip-components=1 -xz -C /app/heroku/node

# Export the node path in .profile.dRUN echo "export PATH=\"/app/heroku/node/bin:/app/user/node_modules/.bin:\$PATH\"" > \ /app/.profile.d/nodejs.sh

ONBUILD ADD package.json /app/user/ONBUILD RUN /app/heroku/node/bin/npm installONBUILD ADD . /app/user/

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Create Dockerfile

heroku docker:init

$ cat Dockerfile

FROM heroku/nodejs

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Docker composeweb: build: . command: 'bash -c ''node index.js''' working_dir: /app/user environment: PORT: 8080 ports: - '8080:8080'shell: build: . command: bash working_dir: /app/user environment: PORT: 8080 ports: - '8080:8080' volumes: - '.:/app/user'

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Start development environment

$ docker-compose up web

Building web......

$ curl "http://$(docker-machine ip dev):8080"

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Rebuild containers

Changes to your app and config.

docker-compose build

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Heroku Release$ heroku create...$ heroku docker:release...$ heroku open

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Demo

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AWS Release$ docker build -t abtris/docker-liberec-example-app...$ docker push abtris/docker-liberec-example-app...$ docker pull abtris/docker-liberec-example-app...

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Run on AWS$ docker run \ -d \ -p 3000:3000 \ abtris/docker-liberec-example-app \ node index.js

$ curl http://localhost:3000

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Demo

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Docker & AWS4 Elastic Beanstalk

4 EC2 Container Service (ECS)

4 EC2 with Swarm, Mesos or Kubernetes

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Questions?

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Credits4 boat-containers.jpg 2

4 computer-scrap.jpg [^3]

4 vm-vs-docker.png [^4]

4 docker logos [^5]

4 formule_one.jpg [^6]

2 https://www.flickr.com/photos/41864721@N00/3451530961/[^3]: https://www.flickr.com/photos/7362086@N02/2019666131/[^4]: http://www.jayway.com/wp-content/uploads/2015/03/vm-vs-docker.png[^5]: https://www.docker.com/brand-guidelines

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