The document provides an overview of Docker, emphasizing its role in packaging applications with all necessary dependencies into containers for consistent deployment across environments. It contrasts Docker with Vagrant, highlighting Docker's reliance on the host OS compared to Vagrant's virtual machine management. The document also includes historical context, setup instructions, and examples of using Docker on a Vagrant-managed Ubuntu environment.

1. Preparation study
of Docker
2016/03/24
Mulodo Vietnam Co., Ltd.

2. “Docker”

3. Docker allows you to package an
application with all of its dependencies
into a standardized unit for software
development.
What is “Docker”?
Docker containers wrap up a piece of
software in a complete filesystem that
contains everything it needs to run:
code, runtime, system tools, system
libraries – anything you can install on
a server. This guarantees that it will
always run the same, regardless of the
environment it is running in.
( https://www.docker.com/what-docker )

4. Docker VS Vagrant ??
Alternatively ?? NO!!
Docker : a kind of Linux container
Vagrant: Virtual machine manager

5. Docker VS Vagrant ??
Alternatively ?? NO!!
Docker : a kind of Linux container
Vagrant: Virtual machine manager
Docker
Work on Host OS
directory
OS of Docker and
Host OS is Same
using host’s OS

6. Docker VS Vagrant ??
Vagrant Emulated OS on Host
OS
Independent from
Host OS.
Virtual box
VMware...

7. Docker VS Vagrant ??
Vagrant Emulated OS on Host
OS
Independent from
Host OS.
where is Vagrant?
Virtual box
VMware...

8. Docker VS Vagrant ??
Vagrant Emulated OS on Host
OS
Independent from
Host OS.
where is Vagrant?
VM managemanet tool
use various VM with
same I/F.
Virtual box
VMware...
I/F

9. Today’s goal
OSX
Mac Book Air
Linux on Linux on OSX
A typical use case on OSX

10. Today’s goal
Linux on Linux on OSX
OSX
Mac Book Air
Vagrant
Virtual Box
Linux
A typical use case on OSX

11. Today’s goal
Linux on Linux on OSX
OSX
Mac Book Air
Vagrant
Virtual Box
Linux
Docker
bin/libs
A typical use case on OSX

12. Today’s goal
Linux on Linux on OSX
A typical use case on OSX
OSX
Mac Book Air
Vagrant
Virtual Box
Linux
Docker
bin/libs
virtual machine (Linux)
virtual machine
(linux)

13. Rough history of container
chroot:(1979, 1983->BSD)
Use user own env.
change root directory.
ex) /home/nemo => /
jail : (2000)
Quarantine/restrictions of OS resources. (≒Namespace)
container : (2005, 2008->Linux)
Namespace (mount:2002.... PID:2008)
Cgroup (Quarantine/restrictions of HW resources)
LXC : (2014 (ver.1))
The one you love.
Docker : (2014 (ver.1))
The one you love.

14. Rough history of Hypervisor
VMware: (1999-)
The first product which used by *many*
engineer.(?)
Xen : (2002)
Use Linux kernel as Hypervisor
KVM : (2006)
Linux kernel include Xen like Hypervisor
Virtual Box : (2007)
proprietary software -> added OSS version.
BHyVe : (2011)
KVM for BSD, simple, small, cool(?)

15. get tired a bit...

16. Create Vagrant machine
# coding: utf-8
# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.configure(2) do |config|
config.vm.box = "ubuntu-14.04"
config.vm.network "private_network", ip: "192.168.33.130"
end
$ vagrant box add utuntu-14.04 https://oss-
binaries.phusionpassenger.com/vagrant/boxes/latest/
ubuntu-14.04-amd64-vbox.box
:
$ vagrant box list
ubuntu-14.04 (virtualbox, 0)
$
Add Vagrant box (ubuntu-14.04)
Create Vagrantfile

17. Setup Docker machine
$ cat hosts
[Docker-server]
192.168.33.130 (virtualbox, 0)
$ cat setup.yml
# setup docker server (base apps)
- include: playbooks/server.yml
# setup docker server
- include: playbooks/docker.yml
$ mkdir playbooks
$
Create hosts, setup.yml, playbooks/

18. Setup Docker machine
$ cat playbooks/server.yml
- hosts: Docker-server
tasks:
- name: "APT: update"
become: yes
apt: update_cache=yes
- name: "APT: clean"
become: yes
shell: >
apt-get -y autoclean;
apt-get -y clean
- name: "APT: install required apps"
become: yes
apt: pkg={{ item }} state=present update_cache=yes
with_items:
- git
- unzip
- emacs
Create playbooks/server.yml (basic apps)

19. Setup Docker machine
Create playbooks/docker.yml
Please check the official Docs
https://docs.docker.com/engine/
installation/linux/ubuntulinux/

20. Setup Docker machine
- hosts: Docker-server
tasks:
# setup to add Docker to APT
- name: "check Docker list file"
- name: "Put docker list file"
- name: "check Docker bin"
- name: "APT: update"
- name: "install apt auth related packagesr"
- name: "get APT key"
- name: "APT: update"
- name: "APT: purge lxc-docker"
- name: "APT : cache"
# install Docker and start docker service
- name: "APT: update"
- name: "APT: add extra imager"
- name: "APT: install Docker"
- name: "service docker start"
Create playbooks/docker.yml
only steps.

21. add Ansible provision into Vagrantfile
# coding: utf-8
# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.configure(2) do |config|
config.vm.box = "ubuntu-14.04"
config.vm.network "private_network", ip: "192.168.33.130"
# Ansible
config.vm.provision "ansible" do |ansible|
ansible.playbook = "./setup.yml"
ansible.inventory_path = "./hosts"
ansible.limit = "Docker-server"
end
end

22. Setup Docker machine
- hosts: Docker-server
tasks:
# setup to add Docker to APT
- name: "check Docker list file"
- name: "Put docker list file"
- name: "check Docker bin"
- name: "APT: update"
- name: "install apt auth related packagesr"
- name: "get APT key"
- name: "APT: update"
- name: "APT: purge lxc-docker"
- name: "APT : caceh"
# install Docker and start docker service
- name: "APT: update"
- name: "APT: add extra imager"
- name: "APT: install Docker"
- name: "service docker start"
Create playbooks/docker.yml
only steps.
Please clone the repository

23. Setup Docker machine
$ git clone -b Docker
git@github.com:nemo-soshi-mulodo/
OpenDevStudyGroup.git
sample scripts.

24. Again..
$ vagrant destroy
$ vagrant up
$ vagrant ssh
Welcome to Ubuntu 14.04 LTS (GNU/Linux 3.13.0-24-generic
x86_64)
* Documentation: https://help.ubuntu.com/
Last login: Thu Mar 24 05:30:32 2016 from 10.0.2.2
vagrant@ubuntu-14:~$ docker version
Client:
Version: 1.10.3
API version: 1.22
Go version: go1.5.3
Git commit: 20f81dd
Built: Thu Mar 10 15:54:52 2016
OS/Arch: linux/amd64
Cannot connect to the Docker daemon. Is the docker daemon
running on this host?
vagrant@ubuntu-14:~$ sudo service docker status
docker start/running, process 8511
vagrant@ubuntu-14:~$

25. Create server
vagrant@ubuntu-14:~$ docker pull php:7.0.2-apache
7.0.2-apache: Pulling from library/php
03e1855d4f31: Downloading 3.666 MB/51.36 MB
a3ed95caeb02: Download complete
18f8f35c7f98: Downloading 3.311 MB/8.716 MB
252f4816c8e7: Downloading 3.222 MB/69.26 MB
f8ac546f9ad6: Waiting
56eec5affd36: Waiting
8d6aa2f3838f: Waiting
082124b746bb: Waiting
a237f42233ef: Waiting
e532fb3215e9: Waiting
c7e6a0f56f27: Waiting
e1c620b7e144: Waiting
6953fe89923b: Waiting
e5bfe4c72d64: Waiting

26. Create server
vagrant@ubuntu-14:~$ docker pull php:7.0.2-apache
7.0.2-apache: Pulling from library/php
03e1855d4f31: Downloading 3.666 MB/51.36 MB
a3ed95caeb02: Download complete
18f8f35c7f98: Downloading 3.311 MB/8.716 MB
252f4816c8e7: Downloading 3.222 MB/69.26 MB
f8ac546f9ad6: Waiting
56eec5affd36: Waiting
8d6aa2f3838f: Waiting
082124b746bb: Waiting
a237f42233ef: Waiting
e532fb3215e9: Waiting
c7e6a0f56f27: Waiting
e1c620b7e144: Waiting
6953fe89923b: Waiting
e5bfe4c72d64: Waiting

27. Create server
vagrant@ubuntu-14:~$ docker pull php:7.0.2-apache
7.0.2-apache: Pulling from library/php
03e1855d4f31: Download complete
a3ed95caeb02: Download complete
18f8f35c7f98: Download complete
252f4816c8e7: Download complete
f8ac546f9ad6: Download complete
56eec5affd36: Download complete
8d6aa2f3838f: Download complete
082124b746bb: Download complete
a237f42233ef: Download complete
e532fb3215e9: Download complete
c7e6a0f56f27: Download complete
e1c620b7e144: Download complete
6953fe89923b: Download complete
e5bfe4c72d64: Download complete
Digest: sha256:b1e1421a1ca86660552025c00ed42906c6619daa1bcb9c477236b80fadc8f27b
Status: Downloaded newer image for php:7.0.2-apache
vagrant@ubuntu-14:~$

28. check server
vagrant@vagrant:~$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
php 7.0.2-apache 90e2c0e2fc5c 8 weeks ago 521 MB
vagrant@vagrant:~$ docker run -d php:7.0.2-apache
1d5fc77e68dde86cbaea5716beef723c102b41e9b0240d44739b08ed83b09d1f
vagrant@vagrant:~$
vagrant@vagrant:~$ docker ps
CONTAINER ID IMAGE COMMAND ..
1d5fc77e68dd php:7.0.2-apache “apache2-foreground" ..
vagrant@vagrant:~$
vagrant@ubuntu-14:~$ docker stop 1d5fc77e68dd
1d5fc77e68dd
vagrant@ubuntu-14:~$ docker ps
CONTAINER ID IMAGE COMMAND ...
vagrant@vagrant:~$

29. check server (2)
vagrant@ubuntu-14:~$ docker run -it php:7.0.2-apache /bin/bash
root@3399320f814e:/var/www/html# ps ax
PID TTY STAT TIME COMMAND
1 ? Ss 0:00 /bin/bash
7 ? R+ 0:00 ps ax
root@3399320f814e:/var/www/html# /etc/init.d/apache2 start
[....] Starting web server: apache2AH00558: apache2: Could not
reliably determine the server's fully qualified domain name, using
172.17.0.2. Set the 'ServerName' directive globally to suppress
this message
. ok
root@3399320f814e:/var/www/html# ps -ax | grep apache
24 ? Ss 0:00 /usr/sbin/apache2 -k start
27 ? S 0:00 /usr/sbin/apache2 -k start
28 ? S 0:00 /usr/sbin/apache2 -k start
29 ? S 0:00 /usr/sbin/apache2 -k start
30 ? S 0:00 /usr/sbin/apache2 -k start
31 ? S 0:00 /usr/sbin/apache2 -k start
55 ? S+ 0:00 grep apache
root@3399320f814e:/var/www/html# exit
exit
vagrant@ubuntu-14:~$ docker ps
CONTAINER ID IMAGE ....
vagrant@ubuntu-14:~$

30. Finished..
I'm looking forward to the event.

31. Finished..
I'm looking forward to the event.
Meow
(Thank you)