Docker Setup

Common Command

## Melihat Running Containter
Docker ps

## Ssh ke dalam container
docker exec -it {containter_code} bash

## Memulai docker
docker-compose up -d

## Mematikan docker
docker-compose down

## TBC

gistfile1.txt

$ sudo apt-get update

$ sudo apt-get install \
     apt-transport-https \
     ca-certificates \
     curl \
     gnupg2 \
     software-properties-common

$ curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -

$ sudo apt-key fingerprint 0EBFCD88

$ sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/debian \
   $(lsb_release -cs) \
   stable"

$ sudo apt-get update

$ sudo apt-get install docker-ce

Verify that Docker installed
$ sudo docker run hello-world
$ sudo docker -v

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2. Build Apps with Dockerfile
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buat sebuah temporary directory yang didalamnya terdiri dari 
-Dockerfile (sebuah file berisi perintah-perintah untuk menjalankan apps)
-app.py (ini contoh aplikasi webbased menggunakan python)
-requirements.txt (ini bagian dari apps)

Dockerfile
# Use an official Python runtime as a parent image
FROM python:2.7-slim

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
ADD . /app

# Install any needed packages specified in requirements.txt
RUN pip install --trusted-host pypi.python.org -r requirements.txt

# Make port 80 available to the world outside this container
EXPOSE 80

# Define environment variable
ENV NAME World

# Run app.py when the container launches
CMD ["python", "app.py"]

requirements.txt
Flask
Redis

app.py
from flask import Flask
from redis import Redis, RedisError
import os
import socket

# Connect to Redis
redis = Redis(host="redis", db=0, socket_connect_timeout=2, socket_timeout=2)

app = Flask(__name__)

@app.route("/")
def hello():
    try:
        visits = redis.incr("counter")
    except RedisError:
        visits = "<i>cannot connect to Redis, counter disabled</i>"

    html = "<h3>Hello {name}!</h3>" \
           "<b>Hostname:</b> {hostname}<br/>" \
           "<b>Visits:</b> {visits}"
    return html.format(name=os.getenv("NAME", "world"), hostname=socket.gethostname(), visits=visits)

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=80)

Build Apps tersebut dengan perintah:
$ docker build -t friendlyhello .

Cek apakah sudah terbentuk image nya atau belum dengan cara :
$ docker images

RUN Apps dengan perintah :
$ docker run -p 4000:80 friendlyhello

Cek di browser 
http://ippublik:4000

Cara stop Apps
$ docker container ls
$ docker container stop $CONTAINER_ID

Docker Registry
Pastikan signup akun di hub.docker.com
$ docker login

TAG image pada docker
Tag berfungsi untuk mengaitkan repository lokal ke registry dengan username/repository:tag
$ docker tag image username/repository:tag

Misalnya
$ docker tag friendlyhello ariretiarno/firstapp:v1

Cek daftar image yang telah di tag dengan perintah
$ docker images

Publish image/share image ke dockerhub
$ docker push username/repository:tag
Cek hasil push di hub.docker.com

Pull and run the image from the remote repository
Untuk menjalankan aplikasi yang telah kita buat di env lain misalnya.. nah kita bisa ketikan perintah:
$ docker run -p 4000:80 username/repository:tag

Selesai...

gistfile2.txt

3. Build apps with nginx
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apps.conf
server {
    listen       80;
    server_name  localhost;

    #charset koi8-r;
    #access_log  /var/log/nginx/host.access.log  main;

    location / {
        root   /var/www/apps;
        index  index.html index.htm;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /var/www/apps;
    }
}

index.html
ini apps saya pakai nginx

Dockerfile
#source utama image
FROM nginx:latest

MAINTAINER Muhamad Ari Retiarno <ari.retiarno@docotel.com>

#VHOST
RUN mkdir -p /var/www/apps
RUN rm /etc/nginx/conf.d/default.conf
ADD apps.conf /etc/nginx/conf.d
ADD index.html /var/www/apps
RUN chown www-data:www-data -R /var/www
RUN chown root:root /etc/nginx/conf.d/apps.conf

#Running into port 80
EXPOSE 80

CMD nginx -g "daemon off;"

Build Apps.
docker build -t aplikasinginx:v1 .

Selesai...
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