Cloud infrastructure design
	- VM
		- KVM hypervisor + libvirt-virsh
		- iSCSI storage for OS+data
		- local SSD for swap
		- fully supported OS: Linux (2.6.32+ based distros)
		- partial support: Windows (+ virtio drivers)
		- may also work: FreeBSD (-CURRENT for virtio)

	- storage
		- 2 storage servers design
			- 2x 2iface bonding (roundrobin), one to each switch
			- 10GE interconnect for replication
		- virtualized storage servers
		- areca hwraid -> drbd -> LVM -> KVM VM -> LVM -> iSCSI target
		- iSCSI multipathing
		- Debian GNU/Linux based
		- Virtual NFS storage server for shared data (ISOs)

	- network
		- RouterOS + Virtual Routers
		- Dual switch architecture, dumb switches


*************************************
*			IMPLEMENTATION			*

Software stack infrastructure:
	- Ruby backend daemons
	- PHP central API [superHA VM]
	- CLI frontend
	- jQuery mobile frontend

3 stages of implementation:
	Bare minimum
		Deadline: end of 2011
	Optimal featureset
		Deadline: hw_purchase_date + 3 months
	Rich featureset
		Dealine: optimal_featureset + 6-12 months




*************************************
*			BACKEND					*

Bare minimum of backend functions
	- Cluster
		 - resource tracking
		 - basic allocator (resource based)
		 - failover support

	- VM
		- create
		- start/stop/reset
		- delete
		- attach/detach ISO

	- storage
		- create VM virtual drive
		- delete VM virtual drive
		- register/unregister ISO

	- network
		- bridge
			- attach tap
			- detach tap
			- IP mac filter
				- assign IP
				- unassign IP

Optimal featureset

	= Bare minimum +

	- Cluster
		- enhanced allocator (resource+usage based)
		- rebalance support

	- VM
		- clean shutdown
		- add/remove more virtual drives
		- local SSD swap management
		- offline migration

	- storage
		- usage monitoring per iSCSI export
		- offline resize

	- network
		- usage monitoring per IP
		- VLAN management
			- attach/detach VM
		- VNC management (port forward)

Rich featureset

	= Optimal +

	- Cluster
		- advanced allocator (resource+usage+trending)
		- automatic rebalance

	- VM
		- userspace tools (linux only, written in Ruby)
		- online migration
		- stats reporting
		- optimized cluster resource planning

	- storage
		- virtual storage management
			- create/delete
			- start/stop/reset
			- attach/detach VLAN

	- network
		- virtual router management
			- create/delete
			- start/stop/reset
			- attach/detach VLAN


*************************************
*			FRONTEND				*

CLI (full unlimited access to everything)
Web interface (user + admin, access restricted - admin vs user)

Bare minimum featureset
	CLI
		- Full scope of bare minimum backend featureset
		- User management
			- Add/delete/modify
	Admin web interface
		- Cluster overview (resources)
	User web interface
		- User management
			- Change password
		- start/stop/reset VM
		- attach/detach ISO

Optimal featureset
	= Bare minimum +

	CLI
		- Full scope of optimal backend featureset
	Admin web interface
		- Bare minimum CLI featureset
		- User management
		- Resource pools for users
	User web interface
		- VM management within resource pool
			- create/delete
		- User locked inside one VLAN
		- html5based in-browser VNC client

Rich featureset
	CLI
		- Full scope of rich featureset
	Admin web interface
		- Full scope of rich featureset
	User web interface
		- Full scope of rich featureset