Basic docker for 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

#resource
https://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
?
?
? 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
Symfony
Laravel
dokuwiki
Wordpress
Drupal 7 Drupal 8
Joomla

PHP version requirement
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 Extension
apxs2, 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 1
PHP
MySQL
Etc.
App 2
PHP
MariaDB
Etc.
App n
PHP
MySQL
Etc.

One Server Multiple Projects
Server
App 1
PHP 5.2.1
MySQL 5.1
Etc.
App 2
PHP 5.5.3
MariaDB 10
Etc.
App n
PHP 7.0
MySQL 5.6
Etc.

Solve this problem!

Virtual Machine (VM)

Can solve this problem

Can solve this problem
But not lightweight and use much more
resources

PHPBrew

PHPBrew
Almost good

PHPBrew
Almost good
But we need encapsulation, portability and
portable

Vagrant

Vagrant
That’s awesome!

Vagrant
That’s awesome!
But may it be more lightweight and portable

Docker

Docker
That’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 Infrastructure
Block Storage
Cluster Farm

Who’s using #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 registry)
Image
(from local)
PULL

#docker workflow
Image
(from registry)
Image
(from local)
Container
PULL
RUN

#docker workflow
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE

#docker workflow
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE
COMMIT

#docker workflow
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE
COMMIT
PUSH

#docker workflow
Dockerfile

#docker workflow
Image
(from local)Dockerfile
BUILD

#docker workflow
Image
Image
(from registry)
PUSH
BUILD

#docker workflow
Image
BUILD
Image
(from registry)
PUSH
PULL

#docker workflow
Image
BUILD
Image
(from registry)
PUSH
PULL
Container
RUN

Go back to #docker solution.

#docker solution
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE
COMMIT
PUSH
Build

#docker solution
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE
COMMIT
PUSH
Ship

#docker solution
Image
(from registry)
Image
(from local)
Container
Container
(changed)
PULL
RUN
CHANGE
COMMIT
PUSH
Run

#docker solution
Image
BUILD
Image
(from registry)
PUSH
PULL
Container
RUN
Build

#docker solution
Image
BUILD
Image
(from registry)
PUSH
PULL
Container
RUN
Ship

#docker solution
Image
BUILD
Image
(from registry)
PUSH
PULL
Container
RUN
Run

Do you understand #docker
workflow and #docker solution?

Next step, we talk about #docker
command

Pull image from repository to local
docker pull ubuntu:xenial

Pull image from repository to local
docker pull ubuntu:xenial
Image Name

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

List container
docker ps

List container (include stopped)
docker ps -a

List images
docker 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

Push image
docker push kusumoto/testhello:latest

Push image
docker push kusumoto/testhello:latest
Image Name (Match on repository)

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

Build image from Dockerfile
docker build -t kusumoto/tutu-bigo-tofblive .
Image Name Path Dockerfileparameter

Push image
docker push kusumoto/tutu-bigo-tofblive:latest

Push image
docker push kusumoto/tutu-bigo-tofblive:latest
Image Name (Match on repository)

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 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

Mapping host volume to container
Image Name
Mapping volume to container [host:container]

docker system prune
System cleanup

docker login
Registry Authentication

Do you want to encapsulate your
container?

network

What is Docker Network?
”Control communicate between container”

Docker Network

Create new #docker network
docker 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

Create new #docker network
docker 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 network
docker network ls

Delete #docker network
docker network rm backend

Delete #docker network
docker 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

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?

Volume

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

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 node
docker-machine create --driver virtualbox node1
Machine Name
Driver for connect

Driver for docker-machine are support

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

List #docker node
docker-machine ls

Start #docker node by docker-machine
docker-machine start node1

Start #docker node by docker-machine
docker-machine start node1
Machine Name

Stop #docker node by docker-machine
docker-machine stop node1

Stop #docker node by docker-machine
docker-machine stop node1
Machine Name

Remove #docker node
docker-machine rm node1

Remove #docker node
docker-machine rm node1
Machine Name

Show docker-machine environment
docker-machine env

Connect shell to you #docker node
eval "$(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.yml
version: '2'
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
redis:
image: "redis:alpine"

Command for execute docker-compose

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

Up all container in docker-compose.yml
docker-compose up -d
Run all container in
background

Down all container in docker-compose.yml
docker-compose down

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
”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 Swarm
docker swarm init

Initialize Docker Swarm
docker swarm init
Command for join to
swarm

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

Join node to your Docker Swarm
docker swarm join --token SWMTKN-1-3o58oh8ahb0ebzqen63pp8dub4u91oqfy4erenaswbulih1ywr-
4xr2p6ipg2tqxeczw6cp183ob 192.168.99.100:2377
IP Address swarm
manager
Token

List all node list and node status
docker node ls

Leave node from swarm cluster
docker swarm leave

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

Create new service in swarm cluster
docker 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 cluster
docker service ls

Scale up/down service in swarm cluster
docker service scale nginx=3

Scale up/down service in swarm cluster
docker service scale nginx=3
Service name
Number of container

Update/Apply service in swarm cluster
docker service update nginx

Update/Apply service in swarm cluster
docker service update nginx
Service name

Delete service in swarm cluster
docker service rm nginx

Delete service in swarm cluster
docker 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

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 cluster
docker stack rm my_stack

Delete stack in swarm cluster
docker stack rm my_stack
Stack name

If you want to create your #docker
image.

but need to customize image via
script.

We’re recommend “Dockerfile”

Format of the Dockerfile
# Comment
INSTRUCTION arguments

Example Dockerfile
FROM scratch
COPY hello /
CMD ["/hello"]

Example Dockerfile
FROM scratch
COPY hello /
CMD ["/hello"]
FROM microsoft/nanoserver
COPY 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

Basic docker for developer

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