(FR) Introduction très sympathique autour des environnements Cloud avec un focus particulier sur la virtualisation et les containers (Docker) (ENG) Friendly presentation about Cloud solutions with a focus on virtualization and containers (Docker). Author: Nicholas Weaver – Principal Architect, Intel Corporation

1. Bare-metal, Docker Containers, and
Virtualization: The Growing Choices for Cloud
Applications
Nicholas Weaver – Principal Architect, Intel Corporation
DATS004

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How did we get here?

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mainframe

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?

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x86

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x86
x86
x86

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x86
x86
x86
x86
x86
x86
x86
x86
x86
x86
x86

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x86

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Server
OS
App

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Server

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Server
App

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Server
App
70%

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Server
App
Server
App
Server
App
70%
25%
33%
43%

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App
App
App
App
App
App
App
App
App
App
App
App
App
App
App
App

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Server
Hypervisor
VM

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Server
Hypervisor
VM
OS
App

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Server
VM
App
App
App
VM
VM
App
VM

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85%

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App
Compute
Networking
Storage

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Virtualization -Pros
•Carves hardware into virtual hardware
•Virtual hardware presented as a virtual machine
•Strong isolation between virtual machines
•Allows for running heterogeneous operating systems
•QoS, orchestration, templates, portability
•Live migration, high-availability, resource pooling

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Virtualization -Cons
•Each virtual machine is a complete stack (OS, patches, applications)
•Hypervisor and supporting management have to be maintained
•Measurable overhead compared to bare-metal

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Containers

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Containers
•Existed back in 2004 –Oracle*Solaris*Zones
•Implemented first by LinuX*Containers (LXC)
•Google’s*control implementation with lmctfy (Let Me Contain That For You)
•Modernized control recently introduced by Docker*

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How does it work?

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System
(Ubuntu*14.04)

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Container A
Container B
System

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Resource Limiting
System
Memory
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B

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Resource Limiting
System
Storage
Container
Memory 1GB
Container
Memory 2GB
Container A
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
Container B

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Resource Limiting
System
CPU
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share

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Namespace Isolation –Processes
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share
PID
1234
1345
1467
PID
1234
1345
1467
Container A’s view of PIDs
Container B’s view of PIDs

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Namespace Isolation -Networking
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share
Interfaces
veth0
veth1
Container A’s view of interfaces
Container B’s view of interfaces
Interfaces
veth3

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Namespace Isolation –Mounts
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share
Mounts
/dev/sda1
Container A’s view of mounts
Container B’s view of mounts
Mounts
/dev/sda2
/dev/sda3

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Namespace Isolation –Mounts
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share
Mounts
/dev/sda1
Container A’s view of mounts
Container B’s view of mounts
Mounts
/dev/sda2
/dev/sda3

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Namespace Isolation –Users
Container
Memory 1GB
Container
Memory 2GB
Container A
Container B
Block Device
10 MB/s
Block Device
10 MB/s
Block Device
20 MB/s
CPU25% Share
CPU75% Share
Users
neo
morpheustrinity
Container A’s view of users
Container B’s view of users
Usersharry
hermioneron

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When things look the same

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Server
VM
App
App
App
VM
VM
App
VM

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VM
Widget Scraper Service
Widget Lib
Linux OS
VM
Widget Painter Service
Widget Lib
Linux*OS
VM
Widget Cleaner Service
Widget Lib
Linux OS

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Widget Scraper Service
Widget Lib
Linux*OS
Widget Painter Service
Widget Cleaner Service
Container A
Container B
Container C

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VM
Widget Scraper Service
Widget Lib
Linux*OS
Widget Painter Service
Widget Cleaner Service
Container A
Container B
Container C

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Server
Widget Scraper Service
Widget Lib
Linux*OS
Widget Painter Service
Widget Cleaner Service
Container A
Container B
Container C

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Some container pros
•Faster lifecycle vs. virtual machines
•Contains what is running within the OS
•Ideal for homogenous application stacks on Linux*
•Almost non-existent overhead

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Some container cons
•Very complex to configure
•Currently much weaker security isolation than virtual machines(more on that in a bit)
•Applications must run on Linux*

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Docker*
•Open source container management for Linux*
•Adds DevOps-like features
•Developed by dotCloud (now known as Docker*) to help deliver their PaaS product
•An easy button for containers

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What does Docker*bring?

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Docker*Images
•Ordered results of actions to build a container
-Add file
-Open port
-Run a command
•DevOps like source code for a deployment image
•Uses a copy-on-write file system (like others)

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Docker*Images -Dockerfile

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Images are layers
rootfs
bootfs
run apt-get
set env var
from ubuntu:14.04
cmd = “../apache2”

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Images are layers
rootfs
bootfs
run apt-get
set env var
from ubuntu:14.04
cmd = “../apache2”
my_app

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Images are layers
rootfs
bootfs
run git-clone
mount dir
from my_app
cmd = “../apache2”
my_app2

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Image Registry
•Public Docker registry: Docker*Hub
•Option to deploy your own private Docker Registry

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Docker*Hub

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Client => Server
Docker Daemon
Linux
Docker*Client
Linux*/Windows*/OS X*

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Client => Server
Docker Daemon
Linux
Docker*Client
Linux*/Windows*/OS X*
[docker run web-server]
Container
Web Server
Image

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Client => Server
Docker Daemon
Linux
Docker*Client
Linux*/Windows*/OS X*
[docker run database]
Container
Web Server
Image
Container
Database
Image

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Client => Server
Docker Daemon
Linux
Docker*Client
Linux*/Windows*/OS X*
[docker stop database]
Container
Web Server
Image
Container
Database
Image

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Client => Server
Docker Daemon
Linux
Docker*Client
Linux*/Windows*/OS X*
Container
Web Server
Image

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Docker*Innovations
•Images
-Like templates for VMs
-Copy-on-write makes them behave like code
-Caching takes advantage of uniformity of platform layer
•API and CLI tools for managing container deployments
-Easy to wire into existing CI systems
-Works well with deployment workflows
•Reduces complexity around deploying and managing containers
•Supports namespace and resource limits

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Rubber meets road

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BizApp

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code
Private Docker*Registry
BizApp
Image
Container
laptop
pull
Version Control System
commit
push

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code
Private Docker*Registry
Container
laptop
pull
Version Control System
commit
push
pull
Container
CI server
BizApp
Image
BizApp
Image
Build Server
push
test

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Private Docker*Registry
Docker*+ Containers = Less Friction
BizApp
Docker Daemon
Linux
Docker Daemon
Linux
Docker Daemon
Linux
Docker Daemon
Linux
Docker*Daemon
Linux*
Container
BizApp
Image
Container
BizApp
Image
Container
BizApp
Image
Container
BizApp
Image
Container
BizApp
Image

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The Gotchas

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Are containers secure?

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Payments
Image
Container
physical server
HIPPA
Image
Container
Catalog
Image
Container
Can I trust a container?

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Answer: it depends
•Root access?
•Special surface needs for the application?
•Patches for host
•Auditing requirements?
•Default settings are dangerous

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One more option
Payments
Image
Container
virtual server
HIPPA
Image
Container
Catalog
Image
Container
physical server
virtual server
virtual server
Catalog
Image
Container

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How can Intel help make containers better?
•Security
-Intel® Advanced Encryption Standard New Instructions (Intel® AES-NI)
-Intel® Trusted Execution Technology (Intel® TXT/TCP)
-Intel® SGX
•Performance/Flexibility
-Intel® Virtualization Technology (Intel® VT-x/VT-d/VT-c)
•What if?

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Summary
•New productivity tools make containers an exciting new tool for IT environments
•Containers are especially powerful where application startup time is crucial (seconds vs. minutes)
•Containers are expected to coexist with other virtualization approaches, and pre-existing IT methods
•The container developers ecosystem is maturing quickly; scale deployment ecosystem naturally takes longer to develop
•Docker adds imaging features and greatly simplifies container management
•Intel is working on enhancing the performance, security, and interoperability of containers

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Next Steps
•Explore more on containers
-The Docker Book, James Turnball –www.dockerbook.com
-Run Docker on Windows*or OS X*w/ boot2dockerhttps://github.com/boot2docker/boot2docker

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Additional Sources of Information
•A PDF of this presentation is available from our Technical Session Catalog: www.intel.com/idfsessionsSF. This URL is also printed on the top of Session Agenda Pages in the Pocket Guide.

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Legal Disclaimer
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Risk Factors
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Rev. 4/15/14