[Codelab 2017] Docker 기초 및 활용 방안

양재동 코드랩
DOCKER 기초 및 활용방안

Presentation URL
http://bit.ly/2xNeU4K
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Who made this?
- Server programmer
- AWSKRUG Data Science Group Member
- Before
- Parisien
- AFI Server developer
- Now
- Movilest CTO
- Specialized in
- NodeJS, JAVA, French
- MySQL, dynamodb, redis, mongodb,
- Webpack, ReactJS, Redux
- docker, jenkins, docker-compose, DevOps
- AWS: ELB, EB, Route53, S3, CodeDeploy, Athena … etc
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BYUN, Kyu Hyun

A platform
abstracts away a messy problem
so you can build on top of it.
- Sam Ghods, Co-Founder at Box
6https://www.youtube.com/watch?v=of45hYbkIZs&feature=youtu.be

Summary
1. What is docker?
2. Install kitematic
3. Run docker container using docker-cli
4. Manage docker image using Dockerfile
5. Run docker container using kitematic
6. Build multi-container environments using docker-compose
7. Run docker on AWS EC2 and Elastic Beanstalk
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1.
What is docker?
Everyone says that docker is a trend in micro
services. Why?
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What is docker?
- Docker is the world’s leading software container platform.
- Developers use Docker to eliminate “works on my machine”
problems when collaborating on code with co-workers.
- Operators use Docker to run and manage apps side-by-side in
isolated containers to get better compute density.
- Enterprises use Docker to build agile software delivery pipelines
to ship new features faster, more securely and with confidence for
both Linux and Windows Server apps.
https://www.docker.com/what-
docker

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What is docker-container?
- Using containers, everything required to make a piece of software
run is packaged into isolated containers.
- Unlike VMs, containers do not bundle a full operating system -
only libraries and settings required to make the software work are
needed.
- This makes for efficient, lightweight, self-contained systems and
guarantees that software will always run the same, regardless of
where it’s deployed.
docker

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- Package software into standardized units for development,
shipment and deployment.
- A container image is a lightweight, stand-alone, executable
package of a piece of software that includes everything needed to
run it: code, runtime, system tools, system libraries, settings.
Available for both Linux and Windows based apps, containerized
software will always run the same, regardless of the environment.
- Containers isolate software from its surroundings, for example
differences between development and staging environments and
help reduce conflicts between teams running different software
on the same infrastructure.
docker

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https://www.docker.com/what-container

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- Comparing Containers and Virtual Machines
https://www.docker.com/sites/default/files/VM%402x.png
https://www.docker.com/sites/default/files/Container%402x.png

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- Comparing Containers and Virtual Machines Together
https://www.docker.com/what-container

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Basic docker architecture
https://docs.docker.com/engine/article-img/architecture.svg

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Docker customers
Source: https://d2axcg2cspgbkk.cloudfront.net/wp-content/uploads/ClusterUP-containerscape.png

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Kitematic
Kitematic
- Fast and Easy Setup
- Docker Hub Integration
- Seamless Experience Between CLI and GUI
- Advanced Features
- Automatically map ports
- Visually change environment variables, configuring volumes,
streamline logs and CLI access to containers
https://kitematic.com/

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Kitematic
Docker quickstart terminal

3.
Run docker container
using docker-cli
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Run docker container using docker-cli
Docker Hub
- Docker Hub is a cloud-based registry service which allows you
to link to code repositories, build your images and test them,
stores manually pushed images, and links to Docker Cloud so
you can deploy images to your hosts. It provides a centralized
resource for container image discovery, distribution and
change management, user and team collaboration, and
workflow automation throughout the development pipeline.
https://docs.docker.com/docker-hub/

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https://hub.docker.com/

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https://hub.docker.com/search/?isAutomated=0&isOfficial=0&page=1&pullCount=0&q=node&starCount=0

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Useful command
- docker images
- docker ps -a
- docker attach
- docker run <option>
- docker exec -it <Conatainer-Name> bash
- docker build -t <username>/<image_name>:<TAG> ./
- docker commit <container> <username>/<image_name>:<TAG>
https://docs.docker.com/engine/reference/commandline/cli/

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Docker base command
- https://docs.docker.com/engine/reference/commandline/docker/#description
Example
- https://gist.github.com/novemberde/238b48af0c49e8df4e0796f9182f11c6

4.
Manage docker image
using Dockerfile
27

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Manage docker image using Dockerfile
What is Dockerfile?
- Docker can build images automatically by reading the
instructions from a Dockerfile. A Dockerfile is a text document
that contains all the commands a user could call on the command
line to assemble an image. Using docker build users can create an
automated build that executes several command-line instructions
in succession.
https://docs.docker.com/engine/reference/builder/

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Dockerfile Instruction
- FROM <image> [AS <name>]
- RUN <command>
- CMD command param1 param2
- LABEL <key>=<value> <key>=<value> <key>=<value> …
- EXPOSE <port> [<port>/<protocol>...]
- ENV <key> <value> or ENV <key>=<value> ...
- ADD <src>... <dest>
- COPY <src>... <dest>
- ENTRYPOINT command param1 param2
- VOLUME ["/data"]
- USER <user>[:<group>] or USER <UID>[:<GID>]
- WORKDIR /path/to/workdir
- ARG <name>[=<default value>]
- ONBUILD [INSTRUCTION]

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https://github.com/nodejs/docker-node/blob/c37d5e87fa6d46c0e387f73161b056bbf90b83aa/8.6/Dockerfile

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Build Docker image
- Dockerfile
FROM node
MAINTAINER Novemberde "novemberde.github.io"
# node 배포환경으로 변수 설정
ENV NODE_ENV production
RUN npm install -g pm2 node-gyp
VOLUME /var/lib/node
VOLUME /root/.pm2
EXPOSE 80 443
- Make ‘.dockerignore’ file
- docker build . -t test

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Dockerfile reference
- https://docs.docker.com/engine/reference/builder/
Example
- https://hub.docker.com/r/novemberde/docker_node_server/~/dockerfile/
- https://hub.docker.com/_/jenkins/
- https://hub.docker.com/_/redis/
- https://hub.docker.com/r/wnameless/oracle-xe-11g/
- https://hub.docker.com/_/mysql/
- https://hub.docker.com/_/mongo/

5.
Run docker container
using kitematic
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Run docker container using kitematic
Create MySQL

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Connect to MySQL

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Connect to MySQL
- Set environment variables ( MYSQL_ROOT_PASSWORD=1234 )

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Connect to MySQL
- Restart the docker container

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Connect to MySQL
- Click EXEC button
- Follow the below image.

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Connect to MySQL
- Configure a custom port

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Connect to the MySQL on a docker container using MySQL Workbench
- CREATE DATABASE wordpress;

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Create wordpress server using docker

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Create wordpress server using docker

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Create an wordpress server using docker

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Create a ghost server using docker

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Create a tensorflow container using docker

6.
Build multi-container
environments using
docker-compose
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What is docker-compose?
https://severalnines.com/sites/default/files/Compose.png

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What is docker-compose?
- Compose is a tool for defining and running multi-container Docker
applications. With Compose, you use a YAML file to configure
your application’s services. Then, with a single command, you
create and start all the services from your configuration. To learn
more about all the features of Compose, see the list of features.
- Compose works in all environments: production, staging,
development, testing, as well as CI workflows. You can learn more
about each case in Common Use Cases.
https://docs.docker.com/compose/overview/

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Build multi-container environments
- Example
version: "3"
services:
webapp:
build:
context: ./
dockerfile: Dockerfile
ports:
- "3000:3000"
environment:
- PORT=3000
volumes:
- src:/src
volumes:
src:

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- Command line interface
- docker-compose [SUBCOMMAND] --help
- build
- --force-rm: Always remove intermediate containers.
- --no-cache: Do not use cache when building the image.
- --pull: Always attempt to pull a newer version of the image.
- --build-arg key=val: Set build-time variables for one service.
- up
- -d: start containers using daemon
- down
- logs
- start
- stop

7.
Run docker on AWS
EC2 and Elastic
Beanstalk
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AWS EC2 and Elastic Beanstalk
- Amazon EC2
- Amazon Elastic Computing Cloud
- Amazon EC2’s simple web service interface allows you to
obtain and configure capacity with minimal friction
- AWS Elastic Beanstalk
- An easy-to-use service for deploying and scaling web
applications and services developed with Java, .NET, PHP,
Node.js, Python, Ruby, Go, and Docker on familiar servers
such as Apache, Nginx, Passenger, and IIS.

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Run docker on EC2
- Install AWS Command line interface on Local
- https://aws.amazon.com/ko/cli/
- Create IAM user for the programmatic access.
- https://console.aws.amazon.com/iam/home
- aws configure
AWS Access Key ID [****************AAAA]:
AWS Secret Access Key [****************AAAA]:
Default region name [ap-northeast-2]:
Default output format [None]:
https://docs.docker.com/machine/examples/aws/#step-2-use-machine-to-create-the-
instance

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Run docker on EC2
- docker-machine create --driver amazonec2 --amazonec2-open-port 8000 --
amazonec2-region us-east-1 aws-sandbox
- docker-machine ls
- docker-machine inspect <machine>
- docker-machine ssh aws-sandbox
sudo docker container ls -a
exit
- docker container ls -a
https://docs.docker.com/machine/examples/aws/#step-2-use-machine-to-create-the-
instance

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Beanstalk
- Upload new version

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References
- https://www.youtube.com/watch?v=of45hYbkIZs&feature=youtu.be
- https://www.docker.com/what-docker
- https://kitematic.com/
- https://docs.docker.com/docker-hub/
- https://docs.docker.com/engine/reference/commandline/cli/
- https://docs.docker.com/engine/reference/builder/
- https://github.com/nodejs/docker-
node/blob/c37d5e87fa6d46c0e387f73161b056bbf90b83aa/8.6/Dockerfile
- https://docs.docker.com/compose/overview/
- https://docs.docker.com/machine/examples/aws/#step-2-use-machine-to-create-the-
instance

Thanks!
Any questions?
You can find me at:
https://novemberde.github.io
https://awskrug.slack.com/
https://yjdcodelab.slack.com
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[Codelab 2017] Docker 기초 및 활용 방안

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