A common feature of cloud computing solutions is that they enable self-service access to the services they provide. This enables users to directly procure services from the cloud, and it eliminates the need for more time-consuming, labor-intensive, human-driven procurement processes familiar to many in IT. 

That's not to say that a cloud computing solution should provide its services in a free-for-all manner, letting any user take any action within the system. There should be strict controls over the services users have access to and the actions they can perform with those services. This is the only way to ensure that such solutions can actually stand up to the rigors of an enterprise environment.

That being said, the WebSphere CloudBurst Appliance strikes a nice balance between self-service access and security. This balance enables WebSphere CloudBurst users to perform the actions to which they are authorized with the services to which they are authorized.

WebSphere CloudBurst provides this capability by allowing for the definition of users of the system. Each user defined within the WebSphere CloudBurst Appliance has from one to five of the following permission roles:

1. Permission to deploy a pattern to the cloud: A pattern is a virtualized WebSphere application environment.
2. Permission to create a pattern
3. Permission to manage components in the catalog: The WebSphere CloudBurst catalog contains virtual images, scripts, and other artifacts used to create and  maintain  WebSphere virtual systems in a cloud.
4. Permission to administer the cloud
5. Permission to administer the appliance

These permissions align nicely with typical organizational IT roles. For instance, members of a team responsible for middleware environments may have the ability to both create and deploy patterns while members of a team responsible for operating system environments would have the ability to manage components in the catalog (the virtual images in the catalog contain a customizable operating system environment).

In addition to defining users with associated sets of permissions, WebSphere CloudBurst also brings with it a notion of fine-grained access controls. For each resource within WebSphere CloudBurst, such as a virtual image, script package, WebSphere pattern, or WebSphere virtual system, there is associated information about which users have access to that resource. In addition, when appropriate there are associated permissions about what level of access a particular user has to the resource (i.e. read, read-write, etc.).

This fine-grained access model is helpful in many situations in a typical enterprise. Consider the case that the middleware team has created a WebSphere pattern that was only meant to run in production environments due to the amount of resource it requires. In order to prevent a test or development user from deploying this pattern to a test cloud (in WebSphere CloudBurst all users have at least the permission to deploy patterns they have access to), the middleware team could leave the test and development users off of the list of users who have access to see the pattern. When a test or development user logs into the appliance and navigates to the page that contains WebSphere patterns, they will not see this production pattern since they were not granted access.

It's understandable why self-service access is such a popular feature of cloud computing solutions. Providing access so users can provision the resources they need without involving numerous other parties means greater efficiency within the organization. However, this access must be tempered with the right security and access control capabilities. The WebSphere CloudBurst Appliance enables self-service access without compromising these important capabilities.

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