Basic docker for developer

DockerFor Developer

#whoami• Mr. Weerayut Hongsa (@kusumoto_ton)• Graduated from Prince of Songkla University, Phuket Campus

Major Software Engineer• System Administrator / Infrastructure Engineer

(Major Kantana Broadcasting Co., Ltd)• Software Developer (C#, Node.js, Lua, Java, PHP, Javascript)

#Freelance• Software Developer (iCONEXT Co., Ltd)• Interesting DevOps, Software Development, Agile Methodology,

CI/CD, Infrastructure As a Code

#resourcehttps://github.com/Kusumoto/psu-docker-workshop-resource

What is Docker ?

Mr.Weerayut Hongsa - @kusumoto_ton


This is “Dock” :p




#docker??

“Software Container management platform”


#docker??


What is Container ?


#container??

“Concept for create environment for software, without disturbing the rest of the core operating system.”


#container??


Why to use Docker?


Ok, I have a new question.Do you have this problem?






FTP


FTP


FTP


FTP??

?


FTP??

? Software version is not been control.


I would say that, Docker can solve all problem.


#docker platform

Docker Engine Docker Machine Docker Compose Docker Swarm Docker Registry


Why not use VM (Virtual Machine) ?


Virtual Machine (VM) Containers (Docker)

#teamvm vs #teamcontainer


#docker solution


#docker edition

• Community Edition (CE)• Enterprise Edition (EE)


Case Study (Development Case)PHP Web Application Development


PHP version requirement

yii2

CodeIgniterPhalcon

SymfonyLaravel

dokuwiki

Wordpress

Drupal 7 Drupal 8

Joomla



yii2 (PHP 5.4+)

CodeIgniter (PHP 5.6+) Phalcon (PHP 5.5+)

Symfony (PHP 5.5.9+) Laravel (PHP 5.6.4+)

dokuwiki (PHP 5.3.4+)

Wordpress (PHP 5.2.4+)

Drupal 7 (PHP 5.2.5+) Drupal 8 (PHP 5.5.9+)

Joomla (PHP 5.3.10+)



yii2 (PHP 5.4+)

CodeIgniter (PHP 5.6+) Phalcon (PHP 5.5+)

Symfony (PHP 5.5.9+) Laravel (PHP 5.6.4+)

dokuwiki (PHP 5.3.4+)

Wordpress (PHP 5.2.4+)

Drupal 7 (PHP 5.2.5+) Drupal 8 (PHP 5.5.9+)

Joomla (PHP 5.3.10+)


PHP Extensionapxs2, mongo, db2, bcmath, bz2, calendar, cgi, cli, ctype, dab, debug, odbc, dom, embed, exif, fileinfo, filter, fpm, ftp, gcov, gd, gettext, hash, iconv, icu, imap, intl, ipc, ipv6, json, kerberos, mbregex, mbstring, mcrypt, mhash, mysql, openssl, pcntl, pcre, pdo, pgsql, phar, posix, readline, session, soap, sockets, sqlite, tidy, tokenize, xml_all, xmlrpc, zip, zlib


PHP Extensionapxs2, mongo, db2, bcmath, bz2, calendar, cgi, cli, ctype, dab, debug, odbc, dom, embed, exif, fileinfo, filter, fpm, ftp, gcov, gd, gettext, hash, iconv, icu, imap, intl, ipc, ipv6, json, kerberos, mbregex, mbstring, mcrypt, mhash, mysql, openssl, pcntl, pcre, pdo, pgsql, phar, posix, readline, session, soap, sockets, sqlite, tidy, tokenize, xml_all, xmlrpc, zip, zlib


One Server Multiple Projects

Server

App 1PHPMySQLEtc.

App 2PHPMariaDBEtc.

App nPHPMySQLEtc.


One Server Multiple Projects

Server

App 1PHP 5.2.1MySQL 5.1Etc.

App 2PHP 5.5.3MariaDB 10Etc.

App nPHP 7.0MySQL 5.6Etc.



Solve this problem!


Virtual Machine (VM)


Virtual Machine (VM)Can solve this problem


Virtual Machine (VM)Can solve this problem

But not lightweight and use much more resources


PHPBrew


PHPBrewAlmost good


PHPBrewAlmost good

But we need encapsulation, portability and portable


Vagrant


VagrantThat’s awesome!


VagrantThat’s awesome!

But may it be more lightweight and portable


Docker


DockerThat’s awesome!

Lightweight, encapsulation, portability and portable


Can Docker help you?• Docker can create environment compatible for your software.• Docker separate disk space each project.• You software easy for implementation.• You software easy deployment and portability.


PHP Multi Version In One Server


Case Study (Operations Case)Large Scale Web Application


It's time to deployment


Basic Infrastructure






Cloud InfrastructureBlock Storage

Cluster Farm



Cluster Farm



Cluster Farm



Cluster Farm


Who’s using #docker?


How do you know software support #docker?


How do you know software support #docker?


We talk about an element of Docker.


Element of Docker

Registry (Docker Repository)ContainerImage


Image

”A template of container”


Image

• Linux or Windows Inside.• Already install the application and environment.• Build from Dockerfile or container. • After build image, the image can been read only.• Template of container.


Container

”Wrap up a piece of software in a complete filesystem that contains everything it needs to run”


Container

• Create from image.• Running Process• Can modify/access after container up and running• Commit change to create image


Registry

”The repository of images”


Registry

• Contain a lot of images.• There are many services, Docker hub is key future.• Image on registry can pull from any location.


Image vs Container

• Compare the OOP concept (Image = Class, Container = Object)• Image can't writable / Container can writeable• Image can extends• Image need transform to Container only for runnable.


Next step, we talk about Docker workflow.


#docker workflow


#docker workflow

Image(from registry)


#docker workflow


Image(from local)

PULL


#docker workflow


Image(from local)

Container

PULL

RUN


#docker workflow


Image(from local)

Container Container (changed)

PULL

RUN

CHANGE


#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT


#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


#docker workflow

Dockerfile


#docker workflow

Image(from local)Dockerfile

BUILD


#docker workflow

Image(from local)Dockerfile Image

(from registry)PUSH

BUILD


#docker workflow


BUILD


PUSH

PULL


#docker workflow


BUILD


PUSH

PULL

Container

RUN


#docker workflow


BUILD


PUSH

PULL

Container

RUN


Go back to #docker solution.


#docker solution


#docker solution


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSHBuild


#docker solution


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSHShip


#docker solution


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSHRun


#docker solution


BUILD


PUSH

PULL

Container

RUN

Build


#docker solution


BUILD


PUSH

PULL

Container

RUN

Ship


#docker solution


BUILD


PUSH

PULL

Container

RUN

Run


Do you understand #dockerworkflow and #docker solution?


Next step, we talk about #dockercommand


#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


Pull image from repository to localdocker pull ubuntu:xenial



Image Name




#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


Create container from image and run container

docker run ubuntu:xenial /bin/echo “hello word”



Image Name execute argument



docker run -d ubuntu:xenial /bin/echo “hello word”

Image Name execute argument


parameter





#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


List containerdocker ps


List containerdocker ps


List container (include stopped)docker ps -a


List imagesdocker images


List imagesdocker images


Create a new image from a container’s changes

docker commit d927d74ecd97 kusumoto/testhello:latest

Image NameContainer


Create a new image from a container’s changes

docker commit d927d74ecd97 kusumoto/testhello:latest


#docker workflow


Image(from local)


PULL

RUN

CHANGE

COMMIT

PUSH


Push imagedocker push kusumoto/testhello:latest



Image Name (Match on repository)




#docker workflow


BUILD


PUSH

PULL

Container

RUN


Build image from Dockerfiledocker build -t kusumoto/tutu-bigo-tofblive .



Image Name Path Dockerfileparameter




#docker workflow


BUILD


PUSH

PULL

Container

RUN


Push imagedocker push kusumoto/tutu-bigo-tofblive:latest



Image Name (Match on repository)




#docker workflow


BUILD


PUSH

PULL

Container

RUN


docker run -d kusumoto/docker-openresty:latest


-d : run container in background mode


docker run -d kusumoto/docker-openresty:latest



Utility Command


docker exec -it 158b4a099baf bash

Execute shell into container


docker exec -it 158b4a099baf bash

Execute shell into container


docker run -d -p 80:80 nginx:latest

Image Name

Create container and expose port to real host

Run container background

Expose port from container port 80 to local port 80 [local:container]


docker run -d -p 80:80 nginx:latest

Create container and expose port to real host


docker run -d -v /home/kusumoto/test:/usr/share/nginx/html -p 80:80 nginx:latest

Mapping host volume to container




Run container backgroundExpose port from container port 80 to local port 80 [local:container]

Image Name

Mapping volume to container [host:container]





docker system prune

System cleanup


docker system prune

System cleanup


docker login

Registry Authentication


docker login

Registry Authentication


Do you want to encapsulate your container?


Next step, we talk about #dockernetwork


What is Docker Network?

”Control communicate between container”


Docker Network


Create new #docker networkdocker network create --driver bridge --subnet=192.168.1.0/24 --ip-range=192.168.1.128/25 --gateway=192.168.1.5 --opt="com.docker.network.mtu"="1500" backend



Network driver Network subnet IP range for container use.Gateway for

master subnet Network name




List all #docker networkdocker network ls


List all #docker networkdocker network ls


Delete #docker networkdocker network rm backend



Network name




Run container and attach network docker run -d --name nginx --net backend --ip="192.168.1.130" -p 80:8080 nginx



Attach network to container

Assign ip address to container




Do you want to store and control persistent data in container?


Next step, we talk about #dockerVolume


What is Docker Volume?”Concept for manage persistent data in

container”


Type of Data Volumes

• Mount a host directory as a data volume• Mount a shared-storage volume as a data volume• Mount a host file as a data volume


Mount a host directory as a data volume




Run container backgroundExpose port from container port 80 to local port 80 [local:container]

Image Name

Mapping volume to container [host:container]


Mount a host directory as a data volume

Mount a share-storage as a data volume


docker volume create --driver=flocker volumename



docker volume create --driver=flocker volumename

File System Driver



docker container run -it –v volumename:/data busybox sh



docker container run -it –v volumename:/data busybox sh

Mapping file to container [share-storage:container]

Mount a host file as a data volume


docker run --rm -it -v ~/.bash_history:/root/.bash_history ubuntu /bin/bash

Mount a host file as a data volume


docker run --rm -it -v ~/.bash_history:/root/.bash_history ubuntu /bin/bash

Mapping file to container [host:container]

Do you want make an easy to control multiple #docker node?


We’re recommend “Docker Machine”


Docker Machine is attached from Docker Toolbox


What is Docker Machine?

”The tool for management #docker node”


Create new #docker nodedocker-machine create --driver virtualbox node1

Machine Name

Driver for connect


Driver for docker-machine are support


Create new #docker nodedocker-machine create --driver virtualbox node1


List #docker nodedocker-machine ls


List #docker nodedocker-machine ls


Start #docker node by docker-machine

docker-machine start node1




Machine Name





Stop #docker node by docker-machine

docker-machine stop node1




Machine Name





Remove #docker nodedocker-machine rm node1



Machine Name




Show docker-machine environmentdocker-machine env


Show docker-machine environmentdocker-machine env


Connect shell to you #docker nodeeval "$(docker-machine env node1)"


Connect shell to you #docker nodeeval "$(docker-machine env node1)"


Do you think the container management very difficult?


Have a tooling for container management make an easy?


We’re recommend “Docker Compose”


What is Docker Compose?

”A tool for defining and running multi-container Docker applications.”


Docker Compose• A template for create and configuration container• YML format• Up and running in one command• Update all container in one command


Example docker-compose.ymlversion: '2'services:web:build: .ports:- "5000:5000"volumes:- .:/code

redis:image: "redis:alpine"


Command for execute docker-compose


Up all container in docker-compose.ymldocker-compose up -d



Run all container in background




Down all container in docker-compose.yml

docker-compose down


Down all container in docker-compose.yml

docker-compose down


List container in docker-compose stack

docker-compose ps


List container in docker-compose stack

docker-compose ps


If your application have a many current user?


Do you want to scale your application?


We’re recommend “Docker Swarm”


You can scale container to multiple machine via Docker Swarm


Docker Swarm


Docker Swarm

How can you control cluster?


Docker Swarm

Choose a once node promote to manager


Docker Swarm

Manager


Docker Swarm

ManagerNode Node Node Node


Docker Swarm

ManagerNode Node Node Node


Docker Swarm


Docker Swarm


Docker Swarm

”Run the Docker in cluster mode”


Docker Swarm• Scalable container to multiple docker node.• Control container multiple docker node via docker swarm manager. • In Docker swarm, you’ll have some new concepts of “services” and “tasks”.


Initialize Docker Swarmdocker swarm init





Command for join to swarm


Join node to your Docker Swarmdocker swarm join --token SWMTKN-1-3o58oh8ahb0ebzqen63pp8dub4u91oqfy4erenaswbulih1ywr-4xr2p6ipg2tqxeczw6cp183ob 192.168.99.100:2377



IP Address swarm manager

Token




List all node list and node statusdocker node ls


List all node list and node statusdocker node ls


Leave node from swarm clusterdocker swarm leave


Leave node from swarm clusterdocker swarm leave


Create new service in swarm clusterdocker service create --name nginx-web -p 80:80 nginx:latest



Image Name

Expose port from service port 80 to local port 80 [local:container]

Service name




List all service in swarm clusterdocker service ls


List all service in swarm clusterdocker service ls


Scale up/down service in swarm clusterdocker service scale nginx=3



Service name

Number of container




Update/Apply service in swarm clusterdocker service update nginx



Service name




Delete service in swarm clusterdocker service rm nginx



Service name




Add service stack from docker-compose.yml to swarm cluster

docker stack deploy --compose-file docker-compose.yml my_stack




Compose file Stack name





Delete stack in swarm clusterdocker stack rm my_stack



Stack name




If you want to create your #dockerimage.


but need to customize image via script.


We’re recommend “Dockerfile”


Format of the Dockerfile

# CommentINSTRUCTION arguments


Example Dockerfile

FROM scratchCOPY hello /CMD ["/hello"]


Example Dockerfile

FROM scratchCOPY hello /CMD ["/hello"]

FROM microsoft/nanoserverCOPY hello.txt C:CMD ["cmd", "/C", "type C:\\hello.txt"]


Dockerfile Instruction • FROM • RUN• CMD• EXPOSE• ENV• ADD• COPY• ENTRYPOINT• VOLUME• USER• WORKDIR• ARG


.dockerignore file• Defined filename or path ignore in docker image.• .dockerignore is same .gitignore





Image Name Path Dockerfileparameter




Date post:	05-Apr-2017
Category:	Technology
Upload:	weerayut-hongsa
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Basic docker for developer

Technology