Docker 101 – Build, Ship & Run – Son fonctionnement

View Github Repository Open presentation in a new window

november-eleven

See all presentation from november-eleven

Docker 101 – Build, Ship & Run – Son fonctionnement

0 0

docker-101

On Github november-eleven / docker-101

Docker 101

Build, Ship & Run

Qui suis-je ?

  • Thomas LE ROUX
  • Backend & Infrastructure Engineer chez Captain Dash
  • @VenomberVeelen

Docker, pour qui ?

  • Devs
  • Ops
  • All langages
  • All databases
  • All operating system
  • GNU/Linux oriented
  • Any distro
  • Any Cloud
  • Any Machines
  • GNU/Linux oriented

Docker, pourquoi ?

Développer, déployer et exécuter n'importe quelle application, n'importe où...

  • Matrix from Hell
  • "Chez moi ça marche !"
  • Imcompatibility
  • Container
    • Build & configure once, execute anytime.
    • Propre, immutable et portable.
    • Package & Ship all dependencies/packages.
    • Automate testing, integration, packaging and deployment.
    • Isolation made easy.
    • Cycle de vie et Maintenance plus efficace, cohérente et reproductible.
    • Awesome for continous deployment.
    • Reduce inconsistencies between develop, test, integration, staging and production.

Linux Containers (LXC)

High Level: Lightweight VM
  • Own process space
  • Own network interface
  • Can run stuff as root
  • Machine container
Low level: Chroot on steroids.
  • Isolated process
  • Share kernel with host
  • No device emulation
  • Limit resources usages with cgroups
  • Application container

Son contenu

  • Code source
  • Bibliothèques
  • Gestionnaire de paquet
  • Application
  • Données
  • etc...

Son usage

  • Application web
  • API
  • Base de données
  • Service réseau
  • Map/Reduce
  • etc...

Son fonctionnement

Union file systems

Application

Duplication

Modification

Docker Hub

Docker Hub: Find, manage, and push and pull images from community...

Atelier pratique

docker search

[automne@xps-dash ~]$ docker search debian

docker search

[automne@xps-dash ~]$ docker search debian
NAME                                  DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
ubuntu                                Ubuntu is a Debian-based Linux operating s...   2414      [OK]       
debian                                Debian is a Linux distribution that's comp...   789       [OK]       
google/debian                                                                         47                   [OK]
neurodebian                           NeuroDebian provides neuroscience research...   13        [OK]       
armbuild/debian                       ARMHF port of debian                            4                    [OK]
jesselang/debian-vagrant              Stock Debian Images made Vagrant-friendly ...   4                    [OK]
mschuerig/debian-subsonic             Subsonic 5.1 on Debian/wheezy.                  3                    [OK]
eboraas/debian                        Debian base images, for all currently-avai...   3                    [OK]
fike/debian-postgresql                PostgreSQL 9.4 until 9.0 version running D...   2                    [OK]
webhippie/debian                      Docker images for debian                        1                    [OK]
maxexcloo/debian                      Docker base image built on Debian with Sup...   1                    [OK]
kalabox/debian                                                                        1                    [OK]
takeshi81/debian-wheezy-php           Debian wheezy based PHP repo.                   1                    [OK]

docker pull

[automne@xps-dash ~]$ docker pull node:4.2.1

docker pull

[automne@xps-dash ~]$ docker pull node:4.2.1
4.2.1: Pulling from library/node
7a42f1433a16: Downloading [===========>              ] 18.35 MB/51.36 MB
e2a4fb18da48: Downloading [>                         ] 523.1 kB/34.36 MB
58016a5acc80: Download complete 
3f8d2e13b904: Downloading [====>                     ] 1.564 MB/18.54 MB
17b9226197c6: Downloading [>                         ] 535.4 kB/128.5 MB
2251df231555: Download complete
3d88cbf54477: Downloading [======>                   ]  2.35 MB/12.65 MB

docker pull

[automne@xps-dash ~]$ docker pull node:4.2.1
4.2.1: Pulling from library/node
7a42f1433a16: Pull complete 
e2a4fb18da48: Pull complete
58016a5acc80: Pull complete
3f8d2e13b904: Pull complete
17b9226197c6: Pull complete
2251df231555: Pull complete
3d88cbf54477: Pull complete 
Digest: sha256:3c49d112e4f8ce20f1d7b56259f9bb7c4f06ea0acd2cc0672237c92bce6
Status: Downloaded newer image for node:4.2.1

docker images

[automne@xps-dash ~]$ docker images

docker images

[automne@xps-dash ~]$ docker images
REPOSITORY    TAG       IMAGE ID            CREATED           VIRTUAL SIZE
debian        latest    8c00acfb0175        5 weeks ago       125.1 MB
debian        8.2       8c00acfb0175        5 weeks ago       125.1 MB
debian        jessie    8c00acfb0175        5 weeks ago       125.1 MB
postgres      9.4       a7d662bede59        7 weeks ago       265.3 MB
postgres      latest    f33438ff9aef        3 months ago      265.5 MB
php           5.6       5dc942674030        3 months ago      444.4 MB
php           5.6-cli   5dc942674030        3 months ago      444.4 MB
node          4.2.1     3d88cbf54477        4 months ago      711.7 MB

docker rmi

[automne@xps-dash ~]$ docker rmi php:5.6

docker rmi

[automne@xps-dash ~]$ docker rmi php:5.6
Untagged: php:5.6

docker rmi

[automne@xps-dash ~]$ docker rmi php:5.6-cli
Untagged: php:5.6-cli
Deleted: 5dc94267403086f49501b7a859446761d984098a090237da93eb145e3015e632
Deleted: 4f8b26cff5e02c6508853319c45909e838ccfda238bcb269a0735e4f6646cfa6
Deleted: 4024646becfd2a426f4a323b7653ebc85f6a3ec5e4d6c3201a6a4a5ec864c50a
Deleted: f5b56acf0b55dc9d747bd27e034fb4b990d587190b258aee9fc2219f4809daea
Deleted: a64c83127667b873f073870f8aaccb1f04080104bb54246d5d178e8abaca1b69
Deleted: 5819d16b40399e1d7c339abfebf892a0924c51641ce10f3d0a3f178d6448b38c
Deleted: b562f252576cc5537effbb6a522f48822f93a8d5787d1ebfd40aad4dddf10605
Deleted: a475ee4751ecc37127caa1b976506a70cf47ef543d23f3405bc2bade567a70ee
Deleted: ea0bc0b96f434477ccb08948ee1a6540ee8c240a75e4e3881cee798c70309649
Deleted: 13a4541b11321fd65a9c88e557e2d55892ca3040a83c7bf8bb75c12eb43312a5

docker run

[automne@xps-dash ~]$ docker run --rm -it debian /bin/bash
root@51eefd775542:/#

docker run

[automne@xps-dash ~]$ docker run --name=dev-db \
> -e POSTGRES_USER=user \
> -e POSTGRES_PASSWORD=foobar \
> -d -p 5432:5432 postgres
5ac9e23367f5d16e258355f40188cce93ee32bf79d1e85fa314db0f225fe9611

docker ps

[automne@xps-dash ~]$ docker ps
CONTAINER ID   IMAGE     COMMAND                  
5ac9e23367f5   postgres  "/docker-entrypoint.s"   

CREATED        STATUS        PORTS                   NAMES
2 minutes ago  Up 2 minutes  0.0.0.0:5432->5432/tcp  dev-db

docker ps

[automne@xps-dash ~]$ docker ps -a
CONTAINER ID   IMAGE     COMMAND                  
5ac9e23367f5   postgres  "/docker-entrypoint.s"
843be211f89b   postgres  "/docker-entrypoint.s"

CREATED        STATUS                 PORTS                   NAMES
2 minutes ago  Up 2 minutes           0.0.0.0:5432->5432/tcp  dev-db
6 days ago     Exited (0) 2 days ago                          plague-db

docker start/stop

[automne@xps-dash ~]$ docker stop dev-db
[automne@xps-dash ~]$ docker start dev-db
[automne@xps-dash ~]$ docker restart dev-db

docker kill

[automne@xps-dash ~]$ docker kill dev-db

docker rm

[automne@xps-dash ~]$ docker rm dev-db

Dockerfile

Dockerfile

#
# Dockerfile for Scala on JDK 8
#

FROM debian:8.2
MAINTAINER november-eleven
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update && apt-get upgrade -y
ENV DEBIAN_BACKPORTS "deb http://httpredir.debian.org/debian jessie-backports main contrib non-free"

RUN echo "$DEBIAN_BACKPORTS" > /etc/apt/sources.list.d/jessie-backports.list && apt-get update \
    && apt-get -t jessie-backports install openjdk-8-jdk curl -y \
    && curl -L https://dl.bintray.com/sbt/debian/sbt-0.13.9.deb -o /tmp/sbt.deb \
    && dpkg -i /tmp/sbt.deb && rm -f /tmp/sbt.deb

ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64

docker build

[automne@xps-dash ~]$ docker build -t scala ~/scala/Dockerfile

docker build

[automne@xps-dash ~]$ cd ~/scala/Dockerfile
[automne@xps-dash ~]$ docker build -t scala .

docker build

Step 0 : FROM debian:8.2
 ---> 8c00acfb0175
Step 1 : MAINTAINER november-eleven
 ---> 71328f88e04a
Step 2 : ENV DEBIAN_FRONTEND noninteractive
 ---> df2b2459ecd1
Step 3 : RUN apt-get update && apt-get upgrade -y
 ---> 17826a02626c
Step 4 : ENV BACKPORTS "deb http://httpredir.debian.org/debian jessie-backports main contrib non-free"
 ---> 93abf960dba6
Step 5 : RUN echo "$BACKPORTS" > /etc/apt/sources.list.d/jessie-backports.list && apt-get update && 
    apt-get -t jessie-backports install openjdk-8-jdk curl -y && curl -L https://dl.bintray.com/sbt/debian/sbt-0.13.9.deb
    -o /tmp/sbt.deb && dpkg -i /tmp/sbt.deb && rm -f /tmp/sbt.deb
 ---> 0c7f15474763
Step 6 : ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64
 ---> 23ccadbdfce2
Successfully built 23ccadbdfce2

WebApp avec Play 2.4: Dockerfile

# Dockerfile for play 2.4 app
FROM scala:latest
MAINTAINER november-eleven

ENV APP_SOURCE /usr/local/app
ENV APP_RUNTIME /var/www/app
RUN mkdir -p ${APP_SOURCE} && mkdir -p ${APP_RUNTIME}
ADD . ${APP_SOURCE}
WORKDIR ${APP_SOURCE}

RUN sbt clean && sbt stage && cd "target/universal/stage" && tar -zcf "${APP_SOURCE}/app.tar.gz" . \
    && tar -C "${APP_RUNTIME}" -xvf "${APP_SOURCE}/app.tar.gz"

EXPOSE 8080
WORKDIR ${APP_RUNTIME}
RUN rm -rf "${APP_SOURCE}"
CMD ["./bin/app", "-Dpidfile.path=/dev/null", "-Dhttp.port=8080", "-J-server", "-J-d64"]

WebApp avec Play 2.4: Build

[automne@xps-dash ~]$ docker build -t myapp .

WebApp avec Play 2.4: Ship

[automne@xps-dash ~]$ docker run --rm -it -p 8080:8080 myapp

WebApp avec Play 2.4: Run

Conclusion

Questions ?

0
Docker 101 Build, Ship & Run