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Oracle Solaris Cluster Data Services Developer's Guide     Oracle Solaris Cluster 4.0
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Document Information


1.  Overview of Resource Management

2.  Developing a Data Service

Analyzing the Application for Suitability

Determining the Interface to Use

Setting Up the Development Environment for Writing a Data Service

How to Set Up the Development Environment

Transferring a Data Service to a Cluster

Setting Standard Properties

Cluster Properties

Resource Type Properties

Resource Properties

Resource Group Properties

Resource Property Attributes

Node List Properties

Setting Resource and Resource Type Properties

Declaring Resource Type Properties

Declaring Resource Properties

Declaring Extension Properties

Implementing Callback Methods

Accessing Resource and Resource Group Property Information

Idempotence of Methods

How Methods Are Invoked in Zones

Generic Data Service

Controlling an Application

Starting and Stopping a Resource

Using Start and Stop Methods

Deciding Which Start and Stop Methods to Use

Using the Optional Init, Fini, and Boot Methods

Using the Init Method

Using the Fini Method

Guidelines for Implementing a Fini Method

Using the Boot Method

Monitoring a Resource

Implementing Monitors and Methods That Execute Exclusively in the Global Zone

Adding Message Logging to a Resource

Providing Process Management

Providing Administrative Support for a Resource

Implementing a Failover Resource

Implementing a Scalable Resource

Validation Checks for Scalable Services

Writing and Testing Data Services

Using TCP Keep-Alives to Protect the Server

Testing HA Data Services

Coordinating Dependencies Between Resources

Legal RGM Names

RGM Legal Names

Rules for Names Except Resource Type Names

Format of Resource Type Names

RGM Values

3.  Resource Management API Reference

4.  Modifying a Resource Type

5.  Sample Data Service

6.  Data Service Development Library

7.  Designing Resource Types

8.  Sample DSDL Resource Type Implementation

9.  Oracle Solaris Cluster Agent Builder

10.  Generic Data Service

11.  DSDL API Functions

12.  Cluster Reconfiguration Notification Protocol

A.  Sample Data Service Code Listings

B.  DSDL Sample Resource Type Code Listings

C.  Requirements for Non-Cluster-Aware Applications

D.  Document Type Definitions for the CRNP

E. Application


Providing Administrative Support for a Resource

Actions that cluster administrators perform on resources include setting and changing resource properties. The API defines the Validate and Update callback methods so that you can create code that hooks into these administrative actions.

The RGM calls the optional Validate method when a resource is created. The RGM also calls the Validate method when a cluster administrator updates the properties of the resource or its containing group. The RGM passes the property values for the resource and its resource group to the Validate method. The RGM calls Validate on the set of cluster nodes that is indicated by the Init_nodes property of the resource's type. See Resource Type Properties or the rt_properties(5) man page for information about Init_nodes. The RGM calls Validate before the creation or the update is applied. A failure exit code from the method on any node causes the creation or the update to fail.

The RGM calls Validate only when the cluster administrator changes resource or resource group properties, not when the RGM sets properties, or when a monitor sets the Status and Status_msg resource properties.

The RGM calls the optional Update method to notify a running resource that properties have been changed. The RGM runs Update after the cluster administrator succeeds in setting properties of a resource or its group. The RGM calls this method on nodes where the resource is online. This method can use the API access functions to read property values that might affect an active resource and adjust the running resource accordingly.