daz bfe2987752 [arch-design] Migrate cloud architecture examples

1. Migrate and tidy up cloud architecture examples from the current guide
2. Migrate figures
3. Add placeholder sections for new content

Change-Id: I290f555f6e0cd4200deccb4d705127d99e61c343
Partial-Bug: #1548176
Implements: blueprint archguide-mitaka-reorg

2016-03-09 12:25:18 +11:00

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Desktop-as-a-Service

Virtual Desktop Infrastructure (VDI) is a service that hosts user desktop environments on remote servers. This application is very sensitive to network latency and requires a high performance compute environment. Traditionally these types of services do not use cloud environments because few clouds support such a demanding workload for user-facing applications. As cloud environments become more robust, vendors are starting to provide services that provide virtual desktops in the cloud. OpenStack may soon provide the infrastructure for these types of deployments.

Challenges

Designing an infrastructure that is suitable to host virtual desktops is a very different task to that of most virtual workloads. For example, the design must consider:

Boot storms, when a high volume of logins occur in a short period of time
The performance of the applications running on virtual desktops
Operating systems and their compatibility with the OpenStack hypervisor

Broker

The connection broker determines which remote desktop host users can access. Medium and large scale environments require a broker since its service represents a central component of the architecture. The broker is a complete management product, and enables automated deployment and provisioning of remote desktop hosts.

Possible solutions

There are a number of commercial products currently available that provide a broker solution. However, no native OpenStack projects provide broker services. Not providing a broker is also an option, but managing this manually would not suffice for a large scale, enterprise solution.

Diagram

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