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OpenStack is much more than a Cloud Technology platform. It's also a thriving ecosystem of companies, and a fast-moving open source project. These three forces are accelerating one of the biggest changes to IT infrastructure we've seen. Dell, HP, IBM, Intel, Red Hat and two hundred others of the largest IT names in the world are already on board. Do you like saving money on IT infrastructure? Or coding cool large-scale systems? Or automating systems to make your job easier? Come and learn about this fantastic piece of software and its community. One last point that might interest you - there's strong demand internationally for OpenStack engineers.
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A Motivating Example
What is OpenStack?
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OpenStack provides access to compute, networking and storage
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Access compute resources
Start 5 servers, each with:• 2 CPUs• 4 GB of RAM• 20 GB of storage
User Suspend server "X"
Snapshot server "X"
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Access networking resources
Create private network withsubnet 10.2.12.0/24
User
Attach IP address 203.0.113.19 to server "X"
Allow access to ports 80 and 443 for the
"web" group
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Access block storage resources, which attach to servers like disks
Create a 100 GB data volume and attach it to
server "X"
User
Take a snapshot of volume "Q"
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Access object storage resources, which are accessed over HTTP
Store file family.png in container "photos"
UserMake file logo.png in
container "acme" visible to everyone
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OpenStack includes a web-based Dashboard service
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Make requests with command-line tools or REST API
$ nova boot --image precise --flavor m1.small myinstance
Client
HTTP POST/servers
{ "server": { "imageRef": ... "flavorRef": ... "name": "myinstance", }}
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Also... Python bindings! import novaclient.v1_1.client as nvclient creds = ... nova = nvclient.Client(**creds) image = nova.images.find(name="precise") flavor = nova.flavors.find(name="m1.small") nova.servers.create(image=image, flavor=flavor, name="myinstance")
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ECO
SYST
EM S
IZE
(Mem
bers
+ S
pons
ors
+ Su
ppor
ters
)
CUMULATIVE CONTRIBUTORS
AVERAGE MONTHLY CONTRIBUTORS
PATCHESMERGED
1017 230 7,260
(Grizzly Release Cycle – Six Months)
230Companies TOP 10 Countries
1) United States2) China3) India4) Great Britain5) Australia
12,154 6) France7) Russia8) Canada9) Ireland10) Germany
INDI
VIDU
AL
MEM
BERS
Project is very active with many contributors
Data from May 2013
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To Name Just a Few…
…and counting.
What does the architecture look like?
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System is a collection of RESTful web services
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Compute service manages VMs on compute nodes
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Image provides a catalog of virtual machine images
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Identity handles authentication and service catalog
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Network service manages connectivity for VMs
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Block storage manages block devices that attach to VMs
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Object storage manages binary objects accessed via HTTP
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Dashboard service provides web interface
Let’s look at an example.
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Alice is a web developer who needs an Ubuntu server to deploy her app for testing
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Start a server using the ‘ubuntu12.04’ image and attach it to network ‘mynet’
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1. Get the compute endpoint and an auth token
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2. Start a new compute server
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3. Download the ubuntu12.04 image
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4. Retrieve the image from the object store
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5. Determine how to connect the VM to ‘mynet’
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6. Start the virtual machine
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Alice sees that her server is now running and connects to it via ssh.
… but how does that work?
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Each OpenStack service is implemented as Linux daemons
Example: Compute Service
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Daemons use non-blocking I/O with eventlet to handle multiple requests
OpenStackdaemon
Eventlet
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Daemons maintain persistent state using an SQL database via SQLAlchemy
OpenStackdaemon
SQLAlchemy
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Daemons communicate using remote procedure call over message queue
OpenStackdaemon
kombu
eventlet.green.zmq
qpidmessage
queue
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Let’s go back to the earlier example
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“Start a new compute server” request comes in to the nova-api daemon
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Ask nova-scheduler to find a compute node that can fulfill the request
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Dispatch the request to nova-compute on a node that has enough resources
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Download the image from the Image service
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Get network connection info from Networking service
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Ask the hypervisor to start the virtual machine
So, what is OpenStack?
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Customisation ‣ OpenStack doesn’t quite do what you need?
‣ Add it, but contribute back if possible ‣ Many things are pluggable
‣ Eg Object Storage Middleware Pipeline ‣ Eg Compute Scheduler ‣ Eg Dashboard
‣ Get a DevStack running and play!
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Interacting with the Community ‣ All development is open
‣ Etherpad → Blueprint → Coded → Reviewed → Released ‣ Collaboratively design features ‣ Competitors working together ‣ Every line of code reviewed by at least two people ‣ An extensive continuous integration and testing infrastructure
Documentation, Translation, Infrastructure is all Collaborative
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Interacting with the Community
l Ask OpenStack! (http://ask.openstack.org/) l https://wiki.openstack.org/wiki/MailingLists l https://wiki.openstack.org/IRC l Your local user group l The comments section on that almost-related blog
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See you in Hong Kong
November 5-8, register now!
λ openstack.org/summit
Design Sessions: not a classic track with speakers and presentations - generally an open brainstorming discussion on a given feature Conference Sessions: Keynotes, Case Studies, Ecosystem, Operations, Strategy, Workshops
Thank you for supporting OpenStack
Tom Fifield [email protected] @Tom Fifield
Ask Questions at ask.openstack.org
![[OpenStack 스터디] OpenStack With Contrail](https://img.pdfslide.net/doc/110x75/58ac83241a28abad118b456d/openstack-openstack-with-contrail.jpg)
