Virtualization and Containerization What is Virtualization? What - - PowerPoint PPT Presentation

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Jul 19, 2023 2.41k likes •2.8k views

Virtualization and Containerization What is Virtualization? What is Containerization? What does this do for us? Virtual Machines: Terminology Types of Hypervisors VirtualBox and VMWare

SLIDE 1

Virtualization and Containerization

SLIDE 2

What is Virtualization?

SLIDE 3

What is Containerization?

SLIDE 4

What does this do for us?

SLIDE 5

Virtual Machines: Terminology

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SLIDE 6

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Types of Hypervisors

SLIDE 7

VirtualBox and VMWare

SLIDE 8

Creating a VirtualBox VM

○ I make virtual machines for you!

SLIDE 9

In a little more detail maybe...

SLIDE 10

Looking at Docker

SLIDE 11

Installing Docker

SLIDE 12

Docker Prerequisites

$ uname -r 3.11.0-15-generic

SLIDE 13

Docker APT Sources

$ apt-get update && apt-get install apt-transport-https ca-certificates $ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 -- recv-keys 58118E89F3A912897C070ADBF76221572C52609D

SLIDE 14

Docker APT Sources

SLIDE 15

Install and Run the Docker Service

SLIDE 16

Other Install Notes

SLIDE 17

Installing Containers in Docker

SLIDE 18

What to do next?

SLIDE 19

systemd-nspawn

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SLIDE 20

Requirements

SLIDE 21

Getting Started

○ mkdir ~/MyContainer ○ # Arch: pacstrap -i -c -d ~/MyContainer base ○ # Debian: debootstrap -arch=amd64 jessie ~/MyContainer

SLIDE 22

The Quick Way

systemd-nspawn -b -D ~/MyContainer -n machinectl login MyContainer

SLIDE 23

But...

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SLIDE 24

Starting at host boot

○ systemctl enable machines.target ○ systemctl enable systemd-nspawn@MyContainer.service ○ cp /usr/lib/systemd/system/systemd-nspawn@.service /usr/lib/systemd/system/MyContainer.service ○ Edit to your heart’s content (we’ll get there in a sec) ○ systemctl enable machines.target ○ systemctl enable MyContainer.service

SLIDE 25

Customizing your container

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SLIDE 26

Real life example

ExecStart=/usr/bin/systemd-nspawn

-quiet --keep-unit
-boot
-link-journal=try-guest
-directory=/var/lib/container/git
-bind=/tank/git-gogs:/srv/gogs
-bind=/home/nate
-network-bridge=br0

SLIDE 27

You don’t want to hear it...

SLIDE 28

File Permissions

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SLIDE 29

Collisions

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SLIDE 30

machinectl

○ machinectl poweroff MyContainer # power down a container ○ machinectl start MyContainer # power on a container ○ machinectl list # list running containers ○ machinectl show MyContainer # show details about MyContainer ○