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Ganeti Web Manager
Cluster Management Made Simple
                Lance Albertson
                Peter Krenesky
      http://is.gd/oscongwm | http://is.gd/oscongwmpdf
About us
        OSU Open Source Lab
Server hosting for Open Source Projects
  Open Source development projects
 Lance / Lead Systems Administrator
   Peter / Lead Software Engineer
Session Overview
Ganeti Basics
Ganeti Web Manager
GWM Internals
Using GWM
Ganeti Cluster
What is Ganeti?
Cluster virtual server management
software tool
Built on top of existing OSS
hypervisors
Fast & simple recovery after physical
failures
Using cheap commodity hardware
Private IaaS
Comparing Ganeti
Utilizes local storage
Built to deal with hardware failures
Mature project
Low package requirements
Easily pluggable via hooks & RAPI
Project Background
Google funded project
Used in internal corporate env
Open Sourced in 2007 GPLv2
Team based in Google Switzerland
Active mailing list & IRC channel
Started internally before libvirt
Terminology
Components
 Python
 Haskell
  DRBD
  LVM
Hypervisor
Architecture
Nodes
Physical machine
Fault tolerance not required
Added/removed at will from cluster
No data loss with loss of node
Instances




Virtual machine that runs on the
cluster
fault tolerant/HA entity within cluster
Instance Parameters
Hypervisor (called hvparams)
General (called beparams)
Networking (called nicparams)
Modified via instance or cluster
defaults
Disk template
drbd : LVM + DRBD between 2 nodes
plain : LVM w/ no redundancy
file : Plain files, no redundancy
diskless : Special purposes
IAllocator
Automatic placement of instances
Eliminates manual node specification
htools
External scripts used to compute
Components
Automatic allocation
hbal : Cluster rebalancer
hail : IAllocator script
hspace : Cluster capacity estimator
Primary & Secondary concepts




Instances always runs on primary
Uses secondary node for disk
replication
Depends on disk template (i.e. drbd)
Remote API
Remote API
External tools
Retrieve cluster state
Execute commands
JSON over HTTP via REST
RAPI Security
Users & Passwords
RFC 2617 HTTP Authentication
Read-only or Read-write
Easy management of Ganeti
Client facing service
Releases
Project Founded - 9-10-2011
Version 0.4 - 12-20-2010
Version 0.5 - 02-03-2011
Version 0.6 - 03-04-2011
Version 0.7 - 06-17-2011
Open Sourced Libraries
Django Object Permissions
Django Object Log
Twisted VNC Auth Proxy
Ganeti Web Manager
      Installation
Dependencies
Python >=2.5, 2.7 recommended
Pip - Python package installer
Fabric - Install scripts
VirtualEnv - Python virtual
environments
Git - Distributed Source Control
Fabric Installer
$ fab dev deploy

$ fab prod deploy
Ganeti Web Manager: Cluster Management Made Simple
Import Tools
Find Orphaned Instances
Import New Nodes & Instances
Remove Deleted Nodes & Instances
Cache Updater
    Imports Nodes and Virtual Machines too
$ twistd --pidfile=cache.pid gwm_cache
Cache System
Ganeti Web Manager: Cluster Management Made Simple
Ganeti Web Manager: Cluster Management Made Simple
Ganeti Web Manager: Cluster Management Made Simple
Ganeti Web Manager: Cluster Management Made Simple
Ganeti Web Manager: Cluster Management Made Simple
VNC Auth Proxy




allows proxying through firewall / VPN
no need for passwords
Permissions
Personas
Users can act on behalf of groups
Ownership
            vs.
        Permissions
Ownership is for book keeping
Permissions let you do things
Users Tab
Editing Users
Quotas
Per Persona, Per Cluster
Overriding Default Quota
Future Features
Instance Template
Instance Defaults
API
And much more!
Conclusion
Questions?
         Lance Albertson                                             Peter Krenesky

        lance@osuosl.org                                            peter@osuosl.org

           @ramereth                                                   @kreneskyp

  http://www.lancealbertson.com                           http://blogs.osuosl.org/kreneskyp/


       http://code.google.com/p/ganeti/
http://code.osuosl.org/projects/ganeti-webmgr


                                  Presentation made with showoff
                     http://github.com/ramereth/presentation-ganeti-tutorial
                       http://is.gd/oscongwm | http://is.gd/oscongwmpdf

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