Mirantis Openstack Dc 140918115540 Phpapp02

MIRANTIS 2012 PAGE 1 CONFIDENTIAL MIRANTIS MIRANTIS 2012 CONFIDENTIAL MIRANTIS MIRANTIS 2013

OpenStack Overview

Paul Roberts

Principal Solutions Architect, Mirantis

MIRANTIS 2012 PAGE 2 CONFIDENTIAL MIRANTIS

Network security startup Acquired by MCI in 2005

Sun Microsystems Alumni Hosted many internal services such as Shared

Shell Carpathia Hosting

Cloud Architect with >48PB under management Coraid

Principal Architect enabling customers to simplify their complex storage architectures

Mirantis Helping customers design fully operationalized

and automated clouds

Who am I?

MIRANTIS 2012 PAGE 3 CONFIDENTIAL MIRANTIS MIRANTIS 2013

Meetup Goals

Understand current OpenStack trends Understand OpenStack purpose and use cases Understand the OpenStack ecosystem

Definition History Programs (previously called Projects)

Understand OpenStack architecture Logical architecture Provision virtual machine (VM) request flow Components details


What is Cloud?

Cloud compu?ng has transformed the way storage, networking, and compute services are delivered.


Traditional Public Cloud is Not Cheap

The public cloud is phenomenal if you need its elas?city, but if you dont if you do a consistent amount of workload its far, far beUer to go in-house. Eric Frenkiel, MemSQL/Wired

[Things] that need really high performance, in terms of [input and output] and reading and wri?ng to memory really belong on bare-metal servers or private setups. John Engates, CTO Rackspace/Wired

Versus what wed get on the cloud, [private hos?ng is] somewhere between 70 and 100 ?mes cheaper. John Hall, CTO Tradesy/Wired


OpenStack Mindshare


Cloud Job Trends


However, AWS still run-away winner


Oh, Docker.


In the end Developers Win.


What is OpenStack?

As described by Wikipedia:

OpenStack is a cloud computing project aimed at providing an

infrastructure as a service (IaaS).


What is OpenStack?

As described by the OpenStack Foundation:

Aims to produce the ubiquitous Open Source Cloud Computing platform that

will meet the needs of public and private clouds regardless of size, by

being simple to implement and massively scalable.


Cloud Exposed Capabilities (SPI Model)

Data Center (Hardware, Servers, Networking)

Software as a Service (SaaS): browser or thin client

access

Platform as a Service (PaaS): remote login, to install

applications

Infrastructure as a Service (IaaS): Provision CPU, RAM, VM


OpenStack Capabilities

Virtual machines (VMs) on demand provisioning snapshotting

Networks Storage for VMs and arbitrary files Multi-tenancy

quotas for different projects, users user can be associated with multiple projects


OpenStack History

Date Rel Programs Type Note

Jul 2010 N/A PoC * Rackspace Hos?ng & NASA joint launch Oct 2010 Aus4n Nova, Swih PoC Feb 2011 Bexar Nova, Glance, Swih PoC

Apr 2011 Cactus Nova, Glance, Swih PoC ** 6 month development cycle starts

Sep 2011 Diablo Nova, Glance, Swih Prod 1st produc?on release (Cactus) at

Internap (10/27)

Apr 2012 Essex Nova, Glance, Swih, Horizon, Keystone Prod Common web UI and shared authen?ca?on mechanism added

Sep 2012 Folsom Nova, Glance, Swih, Horizon, Keystone, Quantum, Cinder Prod OpenStack Founda?on

Established

Apr 2013 Grizzly Nova, Glance, Swih, Horizon, Keystone, Quantum, Cinder Prod Ceilometer and Heat incuba?on

projects added

Oct 2013 Havana Nova, Glance, Swih, Horizon, Keystone, Neutron, Cinder, Heat, Ceilometer Prod Quantum is renamed to Neutron

Apr 2014 Icehouse Nova, Glance, Swih, Horizon, Keystone, Neutron, Cinder, Heat, Ceilometer, Trove, Savanna, Ironic, Marconi

Prod Limited upgrade path from Grizzly is available

* Pre-July 2010 is predicated by Rackspace Cloud Files project (Swih), NASA Nebula project (Nova)


OpenStack Integrated Programs

Compute (Nova) Networking (Neutron) Object Store (Swift) Block Storage (Cinder) Image Service (Glance) Identity (Keystone) Dashboard (Horizon) Telemetry Service (Ceilometer) Orchestration Service (Heat) Database Service (Trove)

Core

Shared Services

Storage


OpenStack Incubation Programs

Data Processing (Sahara) Queue Service (Marconi) Bare Metal (Ironic)


Each OpenStack Program

Is also a top-level OpenStack component Has an elected Project Technical Lead (PTL) Has separate developers and design teams Has a well defined public API

With the exception of Horizon, which is the Web GUI, all other projects have a RESTfull (JSON/HTTP) API

Common generic API/Infrastructure (Oslo) Has a separate database and isolated persistent

layer


OpenStack Architecture: Begining (Cactus)


OpenStack Architecture: 2 years later


Communication Types HTTP AMQP SQL 3rd-party

UI: Horizon or CLI

Heat Heat API

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

SwiG

Object Store

Proxy Server

Keystone KeystoneAPI

Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent

Compute Node Compute Node

Network

VM

Hypervisor

nova-compute

Network Node DHCP/IPAM

Router/GW

Block Storage Node Storage

Cinder Cinder API

Scheduler

Cinder Backup Cinder DB

Queue

Cinder Vol

Ceilometer Ceilometer

API Collector

Agent

Every OpenStack service exposes access to res6ul API via HTTP Each ac>on treated as distributed transac>on, state built as MQ messages Each service updates its own DB with state informa>on as ac>ons are performed Direct access calls, ex. Plugins,

NetApp, Nicira, etc.


Part 1 Recap

OpenStack open source software for building IaaS OpenStack release cycle is every 6 months OpenStack is an umbrella over multiple independent

programs (components)

All OpenStack components talk RESTful API Most OpenStack components have dedicated DB

(SQL) and MQ (QP), some talk to 3rd party components using their native APIs


Use case: Provision VM

Most common and complex process Interacts with most of OpenStack components


Initial State Assumes Project is created, provisioning quota is available, user has an access to Horizon/CLI Cloud Operator, DevOp, etc.

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent


Step 1: Request VM Provisioning via UI/CLI

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Cloud Operator, DevOp, etc.

User logs in to UI Species VM params: name, avor, keys, etc. and hits "Create" buWon


Step 2: Validate Auth Data Horizon sends HTTP request to Keystone. Auth info is specied in HTTP headers.

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent


Step 2: Validate Auth Data - Success Keystone sends temporary token back to Horizon via HTTP.

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent


Step 3: Send API Request to Nova API

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Horizon sends POST request to Nova API (signed with given token).


Auth Token Usage Neutron


Keystone Architecture

OpenStack Services

Catalog Backend

Token Backend

Policy Backend

Assignments Backend

Iden?ty Backend

Creden?als Backend

Rule management interface and rule-based authoriza>on

Contains temporary tokens

Contains endpoint registry

Contains users and groups

Contains creden>als, e.g. EC2 tokens

Contains domains, projects, roles and role assignments

Deploys with its own DB but can also be subs>tuted with LDAP or other EAS Keystone API


Nova API Characteristics

Exposes REST API via HTTP. Provides system for managing multiple APIs on

different sub-domains. EC2-compatiblestarting to be deprecated Compute APIall innovation happens here

The only "allowed" way to interact with Nova. StatelessHA-ready.


Step 4: Validate API Token

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova API sends HTTP request to validate API token to Keystone.


Nova Database

In theory can be any relational database Most of the deployments are done with MySQL or

PostgreSQL

Nova API talks to database via SQLAlchemy (python ORM (Object Relational Mapper))

Database HA should be done via external tools: Galera Multi-Master replication Model for MySQL (MMM)


Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Step 6a: Publish Provisioning Request

Nova API makes rpc.cast to Scheduler. It publishes a short message to scheduler queue with VM info.

Request has been validated, but no ac>on has been taken yet, i.e. which host, IP address, etc.


Step 7: Pick up Provisioning Request

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Scheduler picks up the message from MQ.


Nova Scheduler

Nova Scheduler is a daemon, which

determines, on which compute host the request should run.

Only provisioning time componentnot like VMwares Distributed Resource Scheduler (DRS)

Typically co-located with the Cloud Controller


Step 8a: Schedule Provisioning

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Scheduler fetches informa>on about the whole cluster from database, lters, selects compute node and updates DB with its ID


Nova Scheduler: Filtering

Anity, An>-anity, etc.

Eliminate inapplicable hosts


Nova Scheduler: Examples

Based on Host statically configured properties SimpleCIDRAffinityFilter AvailabilityZoneFilter

Based on already running individual VMs SameHostFilter DifferentHostFilter

Collocate/Distribute group of VMs GroupAffinityFilter, GroupAntiAffinityFilter

Based on Host resources left CoreFilter,

AggregateCoreFilter RamFilter,

AggregateRAMFilter DiskFilter

Based on Host load IoOpsFilter NumInstancesFilter

Based on image used ImagePropertiesFilter

Write your own


Step 8b: Provision Scheduled

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Scheduler publishes message to the compute queue (based on host ID) to trigger VM provisioning


Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Step 9a: Start VM Provisioning Nova Compute gets message from MQ


Nova Compute Drivers

Nova Compute

XCP

VM

VM

VMWare

PowerVM

VM

VM

libvirt

KVM

VM

VM

Xen

VM

VM

Qemu

VM

VM

LXC

Container

Container

Allows mul>ple hypervisor types per cloud. Libvirt / KVM is most commonly used in deployment

Maintained by Microso_

Maintained by IBM

Bare Metal

Docker

Container

Container

XenAPI

Nai>ve support comes in Icehouse PXE Tilera

Somewhat experimental

Maintained by Citrix

HyperV

VM

VM

ESXi

VM

VM

vSphere

VM

VM


Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Step 9b: Start VM Provisioning Nova Compute makes rpc.call to Nova Conductor for informa>on on VM from DB


Nova Conductor

Eliminates remote DB access (security) Horizontal scalability: spawn multiple worker threads operating in parallel (performance) Hides DB implementation/schema from the Nova Compute (upgrades) Possible offloading of long-running operations from other services, not just Nova Compute Beneficial for operations that cross multiple compute nodes (migration, resizes)

controller node

DB

nova-conductor

compute node

nova-compute rpc.call()


Step 10: Configure Network

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute makes a call to Neutron API to provision network for the instance


Neutron

Provides a flexible API (POST / GET) for service providers or their tenants to manage OpenStack network topologies. Create networks, associate VMs, set routers, etc.

Presents a logical API and a corresponding plug-in architecture that separates the description of network connectivity from its implementation.

One can still choose to stay with nova-network (Essex approach) or to go with Neutron.


Neutron Server

Neutron CLI Nova Horizon

Neutron

Neutron Architecture

Queue

Neutron DB

Optional depending on plugin.

Neutron L3 Agent

HTTP AMQP SQL 3rd-party

Neutron DHCP Agent

Local vSwitches

Neutron L2 Agent

Runs on each Compute Node. Optional depending on plugin.

L3&DHCP Agents Scheduler

Optional

Other Network Services

FWaaS, VPNaaS, LBaaS, etc.

Neutron Metadata Agent

Neutron Plugin

SDN Controller, etc.

Optional depending on plugin.


Step 10: Configure Network (Continued) Neutron congures IP, gateway, DNS name, L2 connec>vity, etc.

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent


Step 11: Request Volume

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

It is assumed a volume is already created. Nova Compute contacts Cinder to get volume data. Can also aWach volumes a_er VM is built.


Open Stack Storage Concepts

Ephemeral storage: Persists until VM is terminated Accessible from within VM as local file system Used to run operating system and/or scratch space Managed by Nova

Block storage: Persists until specifically deleted by user Accessible from within VM as a block device (e.g. /dev/vdc) Used to add additional persistent storage to VM and/or run operating system Managed by Cinder

Object storage: Persists until specifically deleted by user Accessible from anywhere Used to add store files, including VM images Managed by Swift


Cinder Resources

Volumes: Persistent R/W Block Storage devices Can be attached to VMs as secondary storage Can be root store to boot VMs Can be attached only to one instance at a time Keep their state independent of instances

Snapshots: Read-only point in time copy of a volume Can then be used to create a new instance

Backups: An archived copy of a volume


Cinder

Cinder Architecture

Cinder DB

Queue

Cinder Volume

Backend Storage Devices Scheduler

Cinder API

Cinder CLI Nova Horizon HTTP AMQP SQL 3rd-party

Cinder Backup

Object Storage


Cinder Volume Driver iSCSI:

Dell EqualLogic EMC VMAX/VNX Hitach HDS HP 3PAR (StoreServ) HP / Lefthand SAN (StoreVirtual) Huawei T/Dorado/HVS IBM Storwize family/SVC/XIV LVM (Reference Implementation) Nexenta NetApp SolidFire VMware VMDK Windows Server 2012 Zadara

GlusterFS NFS (volumes as sparse files)

IBM General Parallel File System (GPFS) (volumes as sparse files):

GPFS NSD

ATA over Ethernet (AoE): Coraid

Fibre Channel: NetApp HP 3PAR (StoreServ) Huawei T/Dorad/HVS IBM Storwize family/SVC/XIV VMware VMDK

NFS (volumes as sparse files): NFS Nexenta NetApp VMware VMDK Zadara XenAPI Storage Manager

RADOS Block Devices (RBD): Ceph

Shared SAS: VMware VMDK

Scale Out File System (SOFS) (volumes as sparse files): Scality

VirtIO (Local raw storage) (volumes as sparse files)


Cinder Backup Drivers

Swift Ceph IBM Tivoli Storage Manager (TSM)


Step 11: Request volume (Continued)

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute sets up the host mount if needed & instructs the Hypervisor to use vol. as a new block device


Step 12: Request VM Image from Glance

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute requests VM image from Glance via Image ID


Glance

"The Glance project provides services

for discovering, registering, and retrieving virtual machine images."


Glance Summary

Images-as-a-Service. Can use multiple back-ends for image storage. Can store the same image in multiple locations. Supports multiple image formats.


Glance API

Glance CLI Nova Horizon

Glance

Glance Architecture

HTTP AMQP SQL 3rd-party

Glance Registry

Glance DB

Store Adapter

Swift

Cinder

File System

Amazon S3

HTTP

GridFS

Sheepdog

Ceph (RBD)


Step 13: Get Image URI from Glance

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

If image with given image ID can be found - return URI HTTP Get URI


Step 14: Direct Image File Copy

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute can download image using URI, given by Glance, directly from Swift


Step 14 alternative: Image Copy through Glance

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

To leverage Glance Server caching mechanism and addi>onal access restric>on, the Image copy can go through Glance


Step 15: Start VM Rendering via Hypervisor

In case of KVM / libvirtd this is a single XML VM cong le

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute creates a command to Hypervisor and delegates VM rendering to Hypervisor.


Step 16: VM is UP

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Nova Compute sends a message to Nova Conductor to update DB with VM state


Step 17: User is Happy

Nova

Nova DB

Queue Nova API

Scheduler

Conductor

UI: Horizon or CLI

SwiG

Object Store

Proxy Server


Keystone DB

Glance Glance API

Glance Registry

Glance DB Neutron

Neutron DB

Queue Neutron API

Scheduler

Plugin/Agent


Network

VM

Hypervisor

nova-compute


Router/GW


Cinder Cinder API

Scheduler


Queue

Cinder Vol


API Collector

Agent

Horizon polls Nova API for VM status and power state, which is taken from Database.


Recap:

Users log into Horizon and initiates VM creation Keystone authorizes Nova initiates provisioning and saves state to DB Nova Scheduler finds appropriate host Neutron configures networking Cinder provides block device Image URI is looked up through Glance Image is retrieved via Swift VM is rendered by Hypervisor


In the end Developers Win.


Special Offer for OpenStack DC Meetup

Sign up for any OpenStack class by Mirantis

in Washington, DC in 2014 and save 10% off the ticket price.

To redeem your discount, use the code DC_Meetup_2014

Course schedule in Washington, DC:

OpenStack Bootcamp with Exam (OS110) Sep 30 Oct 3

OpenStack Bootcamp with Exam (OS110) Nov 11 - 14

OpenStack Fundamentals (OS50) Nov 17

OpenStack Bootcamp II (OS200) Nov 18 - 20

For complete schedule, course description, and registration visit training.mirantis.com


Questions and Comments?

Paul Roberts Twitter: pauljrob [email protected]

Documents

Mirantis Openstack Dc 140918115540 Phpapp02