Transcript Introduction to PlanetLab

PlanetLab:
A globally distributed testbed
for New and Disruptive Services
CS441
Mar 15th, 2005
Seungjun Lee
[email protected]
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Overview
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Background
PlanetLab is…
Advantages
Key Design Principle
PlanetLab Virtual Machine
Slice Creation
Background
• Internet is increasingly being ossified
• Still only best-effort packet delivery service
• Not much changed to IP protocol since the first
design
• New global-scale services emerge
• How to develop and test such services
• The need of global-scale testing infrastructure
PlanetLab is …
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set of Linux PCs widely-distributed
common software architecture
shared network testbed
deployment platform
Advantages
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Experiment at scale
Experiment under real-world conditions
Potential for real workloads and users
Low entry cost
Key Design Principle
• Distributed virtualization
• Slice : distributed set of virtual machine resources
• Isolation
• Isolate services from each other
• Protect the Internet from PlanetLab
PlanetLab Virtual Machines
Service
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Vserver
Vserver
Vserver
Vserver
Vserver
Linux
Hardware
+ Resource Isolation
+ Safe Raw Sockets
+ Instrumentation
Combined
Isolation and
Application
Interface
PlanetLab Network Architecture
• Node manger (one per node)
• Create slices for service managers
• When service managers provide valid tickets
• Allocate resources for vservers
• Resource Monitor (one per node)
• Track node’s available resources
• Tell agents about available resources
PlanetLab Network Architecture
• Agents (centralized)
• Track nodes’ free resources
• Advertise resources to resource brokers
• Issue tickets to resource brokers
• Tickets may be redeemed with node managers to obtain the
resource
PlanetLab Network Architecture
• Resource Broker (per service)
• Obtain tickets from agents on behalf of service managers
• Service Managers (per service)
• Obtain tickets from broker
• Redeem tickets with node managers to acquire resources
• If resources can be acquired, start service
Slice Creation
Agent
Broker
Service
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Slice Creation
Agent
Resource
Monitor
Broker
Service
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Slice Creation
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Resource
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Broker
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Slice Creation
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ticket
Resource
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Broker
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Slice Creation
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Broker
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Resource
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Slice Creation
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Broker
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Resource
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Slice Creation
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Broker
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Slice Creation
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Slice Creation
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Slice Creation
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Slice Creation
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Service
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Joining PlanetLab AS Users
• http://www.planet-lab.org/php/join_user.php
• new users must register for a new account and then
contact their local PI for their account to be activated.
• SSH private/public key pair
Q&A
• http://www.planet-lab.org
• Mailing list : arch, announce, user