ommunity-lab testbed and loudy distributionpeople.ac.upc.edu/mselimi/slides/slides1.pdf · outline...

Mennan SelimiUniversitat Politècnica de Catalunya - BarcelonaTECH

CLOMMUNITY

COMMUNITY-LAB TESTBED AND CLOUDY DISTRIBUTION

Outline

• Community networks

• Community-Lab

• Community-Lab Demo

• Motivation

• Community Clouds

• Services in Community Networks

• Cloudy Demo

CLOMMUNITY-PROJECT.EU Decentralized Systems 2015 1

Community Networks

• What’s this ? A cooperative development of a network

• Where ? Local, community (city, region, area)

• Who? You and your neighbors

Don’t buy the network, be the network !

Scalable, self-organized and decentralized IP networks and services built and operated by citizens for citizens


26.600+ nodes 50.000+ km of links


Community-Lab

• An open, distributed infrastructure for experimentation with Community Networks

• An outdoor testbed with nodes and links embedded in community networks, with many people too

• A realistic environment for experimentation with the best and worst of real community networks

• Research Devices connected to Community Devices


Community-Lab DEMO

206 Nodes

Slice creation Adding slivers

Sliver properties Sliver templates

COMMUNITY-PROJECT.EU Decentralized Systems 2015 5

http://community-lab.net

26.600+ nodes 50.000+ km of links

What other services can community members provide to each other ?


Motivation

• Wireless networks successful as communication infrastructure in underserved areas

• Opportunity to build community network clouds in wireless mesh networks

• Cooperative deployment and maintenance of clouds

• Saving of uplink bandwidth - no need to consume services from the Internet. They are available within the wireless network

• Storage, Video streaming and service discovery in community clouds


Community Clouds➡ The vision of cloud-based services in community networks

➡ We are talking about specific community cloud:✦ built in community network✦ hosted in community-owned

computing resources✦ providing services of local interest ✦ A P2P cloud made of individual

computers and home gateways

Pros: - no single entity that owns or controls - to join/leave no need for permission or consent - small components, energy-efficient, well distributed

Cons: - can’t provide the QoS of Google, Amazon


Services in community clouds• Technological barrier when deploying services

• Community network cloud distribution

✦ Service Discovery platform

✦ Decentralization

✦ User-friendliness and experience

✦ Free, Open Source Software (FOSS)

• Cloudy

• Debian GNU/Linux distribution aimed to foster the transition and adoption of the CN cloud environment

• can be installed in VMs or “bare metal”

• running on low-resource devices

CLOUDY

http://cloudy.community/CLOMMUNITY-PROJECT.EU Decentralized Systems 2015 9

Cloudy Architecture• Internal architecture

• overlay to interconnect all nodes in a community cloud

• service announcement and discovery: publish local information to the cloud and receive remote data from neighbor peers

• Services included:

• Database: CouchDB• Storage: Tahoe-LAFS, XtreemFS, etcd, Syncthing• VoIP: Asterisk DUNDi• Video streaming: PeerStreamer• Video on demand: Gvod• Container: OpenVZ• Discovery: and Announcement: Avahi• Network overlay: TincVPN• Proxy, SNP Services, DNS Services Cloudy architecture


Tahoe-LAFS• Open source, secure distributed data storage system

• Provider-independent security (security at the client side)

• Erasure coding generalized to K-of-N nodes (3-of-10)

• Tahoe-LAFS grid consists of:

• Client node: user interface into the grid• Introducer node: publish/subscribe hub• Storage node: stores the shares

Tahoe-LAFS architecture

Introducer

Storage

Client

Client

Client

Storage

Storage

Storage


Experimental Environment

43 nodes in total

VMs in most of the machinesCommunity Lab testbed nodes (LXC)

IoT - Internet of Things boards

Number of nodes Type Location

10 - UPC VMs in a single machine Barcelona, Spain

10 - TAR VMs in a single machine Barcelona North, Spain

10 - UPC VMs in a single machine Barcelona South, Spain

4 - KTH VMs in two machines Stockholm, Sweden

2 - ICTP VMs in a single machine Trieste, Italy

4 - CAT Community-Lab nodes Catalonia

3 - CAT Intel Galileo IoT boards Catalonia

OpenWRT

LXC

CLOUDY

Our topology


Tahoe-LAFS vs. XtreemFS

No replication

5 replicas

Sequential read and write of Tahoe-LAFS and XtreemFSwith different replication factors


Tahoe-LAFS


Lessons learned

demonstration to the end users that cloud services are supported by the community wireless network

provision of platform and application services rather than on infrastructure service time-sensitive services as video live streaming, VoIP, VoD

focus on community cloud services

sustainability of the community cloud

incentives for the users to contribute

Tahoe-LAFS promising secure storage service for community network clouds


Conclusion

• Cloud infrastructures are deployed in a real production wireless community network

• A easy to use community distribution might help for massive uptake and provision of stable key services

• Tahoe-LAFS showed to be promising application for privacy-preserving, secure cloud storage


DEMO

CLOMMUNITY

http://cloudy.community/http://clommunity-project.eu/

A community networking Cloud in a boxCLOMMUNITY

Demo http://84.88.85.42/user/pass: guest/guest

Service Discovery• Avahi - system which facilitates the service discovery on a local network via

the mDNS/DNS-SD protocol suite

• In community networks nodes are spread over different broadcast domains, Avahi packets can not reach !

• One solution: TincVPN

✦ Virtual Private Network daemon that uses tunneling and encryption to create a secure private network between hosts

✦ Installed and configured on every Cloudy

Domain ADomain B


ommunity-lab testbed and loudy distributionpeople.ac.upc.edu/mselimi/slides/slides1.pdf · outline...

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