XS Community Edition/0.3/Project Specifications
School Server - Community Edition 0.3 Project Specifications
Summary
The school server is very similar in concept to a standard home wireless router. In everyday usage it provides various services which extend capabilities of the connected laptops while being totally transparent to the user. These services can include:
- Network connection – various services similar to what you would find in a home router.
- Presence server – Augments sugar's native collaboration functionality.
- NEW IN 0.3 - Web filtering – Enables schools to comply with local/legal restrictions on internet access for children.
- FUTURE - Security – XO related security services.
- FUTURE - Content management
Reference User
The XS-CE has two different types of reference user:
- Skilled sysadmins running micro-deployments
- Mid-sized deployment with limited onsite sysadmins
Hardware
School servers can be either an XO or standard x86 based hardware.
XO
While desired, it's unclear (as of early May 2013) whether XS-CE v0.3 will run on all 4 XO laptops:
- XO 1
- XO 1.5
- XO 1.75
- XO 4
In common usage, the XO may be augmented by SD cards and two off the shelf USB devices:
- Network connector – Allow the server to offer internet access to connected XO's.
- NEW IN 0.3 -- 2 USB internet dongles.
- NEW IN 0.3 -- External USB hard drive – Allows the server to provide additional storage capabilities.
[Someone clarify-or-remove this sentence:] This strategy it is simple for a deployment to inventory and maintain school servers.
X86
For greater flexibility some schools will want to use standard x86 hardware. While XSCE ran on x86 hardware (given Fedora 17) in late 2012 and early 2013, our recent modularization-refactoring might delay broad x86 readiness during spring 2013. At the same time, diligent volunteers could help make x86 and x86-64bit support increasingly real.
Deliverable
RPM
A RPM combined with tested installation instructions necessary to convert a standard XO-1.75 or Standard x86 computer into a School Server.
IMAGE
NEW IN 0.3 -- An downloadable USB flash drive image, combined with tested installation instructions, which permit deployment staff to install XSCE software without an internet connection.
OS
XSCE has traditionally been available on Fedora 17 / OLPC-OS 12.1.0, but support for F17 will likely be phased out.
NEW IN 0.3 -- Fedora 18 / OLPC-OS 13 -- expected to be 13.1.0.
GUI Later
Command line configuration/administration should eventually be discouraged as the system matures. Future target users are often not familiar with Linux system administration. Initial setup or fixing a problem with their server is not a good time to introduce system administration skill.
Modular design
One of the key design criteria of all successful community-based projects is modularity. The original XS suffered because developers took used monolithic design overcome hardware limitations on the XO-1. The improvements in the XO-1.75 allow for the potential inefficiencies of modularity.
NEW IN 0.3 -- 'plug in services'
Core Server
The core server will contain five services which can be extended via extended services.
Service: Network setup
Purpose:
Provider: xs-setup-network
Service: Dynamic Host Configuration Protocol
Purpose: Schoolserver and clients need to be on same subnet.
Provider: dhcpd
Service: Iptables -- Network Address Translation (NAT)
Purpose: Permits all XO’s to access the internet.
Provider: gateway
Service: Internet domain name server
Prupose:
Provider: named
Service: Backup of student work and restore
Purpose:
Provider: idmgr
Service:Jabber server
Purpose: collaboration > 15 clients needs to work.
Provider: ejabberd
Extended Services
Service: Web server
Purpose: Building block for many other extended services
Provider: apache
Service: proxy server and web cache
Purpose: bandwidth, web-filtering, web-monitoring
Provider: squid
Service: OLPC-update
Purpose: OLPC-update is necessary to update the kernel of XO
Provider: rsync
Service: Activity update
Purpose: Enables teachers to easily distribute new or updated activities to their students
Provider: activity updater
Service: Virtual Private Network (VPN)
Purpose: Creating secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities
Provider: openvpn
NEW IN 0.3 -- Service: Content filtering (TimM??)
Purpose: age-appropriate surfing, legal compliance, religious risks
Provider: dansguardian and opendns
NEW IN 0.3 -- Service: 1-N WebDEV(JerryV, GeorgeH)
Purpose: Journal submissions to teacher, academic record (homework etc)
Provider: WebDAV
NEW IN 0.3 -- Service: Statistics Collection
Purpose: Collects users statics for academic research
Provider: pilot monitoring system
NEW IN 0.3 -- Service: Book server (SameerV, AlexK, GeorgeH struggling!)
Purpose: compete with Khan Academy?
Provider: pathagar
NEW IN 0.3 -- Service: Internet in Box
Purpose: Provide offline content
Provider: ???
Future Features and Objectives
- Raspberry Pi (RPi) compatibility
- Browser-based GUI Config - as primary configuration tool? To configure install setup and core services?
- Puppet remote management (future service below, design goals reviewed May 2013)
- ejabberd roster admin
- Consideration of other devices (Android, Kindle, iPods, iPads)
- Content curation (beyond dumping stuff into Apache directories)
- Khan Academy
Future services
Please consider adding features and objectives to this list if you feel they should be included in a future release. If you consider the feature important and are willing and able to do the necessary work please sign your name to take responsibility for that service.
Service: (GeorgeH, Gerald)
Purpose: local distribution/replication of Sugar Activities etc
Provider: pdsh
Service: (DSD, GeorgeH)
Purpose: Remote administration – There are several systema such as CFEngine and puppet which enables remote management. While not immediately required by AU it is highly desirable by large deployment
Provider: Puppet
Service: Moodle
Purpose:
Provider:
Service: MediaWiki
Purpose:
Provider: