kemalelmizan / docker-training

Docker

Installation

1. Sign up for a docker ID
2. Choose docker CE from docker store
3. Open terminal, run docker -v
4. docker run busybox echo hello world
5. docker ps -a
6. docker rm <image_name>

Playing with Alpine (very small linux container)

1. docker run --name myalpine -it --rm alpine sh for git bash in windows: winpty docker run --name myalpine -it --rm alpine sh
2. in separate terminal: docker ps -a
3. in alpine shell: apk update && apk add --no-cache curl git zsh nano
4. install oh-my-szh: sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
5. nano ~/.zshrc
6. choose your theme, and change ZSH_THEME. e.g.: ZSH_THEME="bira"
7. ctrl + o, ctrl + x
8. zsh
9. exit x2

Playing with node docker image

1. docker run -p 3000:3000 --name mynode -it --rm node:alpine sh
2. node -v
3. npm -v
4. npm install -g create-react-app
5. create-react-app --version
6. mkdir ~/Projects
7. cd ~/Projects
8. create-react-app test-react
9. cd test-react
10. npm start
11. Open in localhost:3000 host browser

Starting postgres

1. docker pull postgres:alpine
2. docker run -p 5432:5432 --name purwadhika-postgres1 -e POSTGRES_PASSWORD=pwd123 -d postgres:alpine
3. docker ps -a
4. docker exec -it purwadhika-postgres1 psql --version
5. docker exec -it purwadhika-postgres1 psql -U postgres -c 'SELECT version();'
6. docker exec -it -e PGPASSWORD=pwd123 purwadhika-postgres1 psql -U postgres
7. \l
8. create database test;
9. \c test
10. create table users (name text, email text);
11. \d
12. insert into users values ('kemal', '[e-mail]');
13. select * from users;
14. \q to quit

Postgres without daemon, e.g. to run pg_dump

1. docker run -it --rm postgres:alpine bash
2. pg_dump --help
3. exit

Starting mysql

1. docker pull mysql:latest
2. docker run -p 3306:3306 --name purwadhika-mysql1 -e MYSQL_ROOT_PASSWORD=pwd1234 -d mysql:latest
3. docker ps -a
4. docker exec -it purwadhika-mysql1 mysql --version
5. docker exec -it purwadhika-mysql1 mysql -h"localhost" -P"3306" -u"root" -p"pwd1234" -e"SELECT VERSION();"
6. docker exec -it purwadhika-mysql1 mysql -u"root" -p"pwd1234"
7. create database test;
8. show databases;
9. use test;
10. create table users (name text, email text);
11. describe users;
12. show tables;
13. insert into users values ('kemal', '[e-mail]');
14. select * from users;
15. \q to quit

Starting mongo

1. docker run -p 27017:27017 --name purwadhika-mongo1 -d mongo:latest
2. docker exec -it purwadhika-mongo1 mongo
3. Run mongo commands in CLI

Starting redis

1. docker run -p 6379:6379 --name purwadhika-redis1 -d redis:alpine
2. docker exec -it purwadhika-redis1 redis-cli
3. info
4. set user:123 token123abc ex 3600
5. get user:123
6. ttl user:123
7. set user:124 token124abc
8. expire user:124 3600
9. ttl user:124
10. exit

Creating your own app image

1. Create hello.js

console.log('Hello world!')

1. node hello.js
2. Create Dockerfile

FROM node:alpine
COPY ./hello.js /
CMD [ "node", "hello.js" ]

1. Build your image : docker build . -t node-hello
2. Running container : docker run --name hello-container1 -d node-hello
3. See container log : docker logs hello-container1
4. Remove container : docker rm hello-container1
5. Remove image : docker image rm node-hello

Dockerizing Node.js Web App

Follow this tutorial

Docker common commands

1. Docker process list : docker ps -a
2. Starting container : docker start <name/ID>
3. Stopping container : docker stop <name/ID>
4. Removing container : docker rm <name/ID>
5. List docker images : docker images
6. Removing image : docker image rm <image id>
7. Copy files from container to host : docker cp <container name>:/ .