Overview of Modifying a Resource Type

Cluster administrators must be able to carry out the following tasks:

• Install and register a new version of an existing resource type

• Allow the registration of multiple versions of a given resource type

• Upgrade an existing resource to a new version of the resource type without having to delete and re-create the resource

A resource type that you intend to upgrade is called an upgrade-aware resource type. Elements of an existing resource type that you might change are as follows:

• Attributes of resource type properties

• The set of declared resource properties, including standard and extension properties

• Attributes of resource properties, such as default, min, max, arraymin, arraymax, or tunability

• The set of declared methods

• The implementation of methods or monitors

You do not necessarily have to modify a resource type when you modify application code.

You need to understand the requirements for providing the tools that will enable a cluster administrator to upgrade a resource type. This chapter tells you what you need to know to set up these tools.