Modifying Resource Attributes
To modify a new resource
# hares -modify resource attribute value
# hares -modify <resource> <attr> <value>
[-sys <system>] [-wait [-time <waittime>]]
The variable value depends on the type of attribute being created.
To set a new resource's Enabled attribute to 1
# hares -modify resourceA Enabled 1
The agent managing the resource is started on a system when its Enabled attribute is set to 1 on that system. Specifically, the VCS engine begins to monitor the resource for faults. Agent monitoring is disabled if the Enabled attribute is reset to 0.
Additional Considerations for Modifying Attributes
Resource names must be unique throughout the cluster and you cannot modify resource attributes defined by the system, such as the resource state.
Linking Resources
To specify a dependency relationship, or "link," between two resources
# hares -link parent_resource child_resource
The variable parent_resource depends on child_resource being online before going online itself. Conversely, parent_resource go offline before child_resource goes offline.
For example, a NIC resource must be available before an IP resource can go online, so for resources IP1 of type IP and NIC1 of type NIC, specify the dependency as:
# hares -link IP1 NIC1
Additional Considerations for Linking Resources
A resource can have an unlimited number of parents and children. When linking resources, the parent cannot be a resource whose Operations attribute is equal to None or OnOnly. Specifically, these are resources that cannot be brought online or taken offline by an agent (None), or can only be brought online by an agent (OnOnly).
Loop cycles are automatically prohibited by the VCS engine. You cannot specify a resource link between resources of different service groups.
Deleting and Unlinking Service Groups and Resources
To delete a service group
# hagrp -delete service_group
To unlink service groups
# hagrp -unlink parent_group child_group
To delete a resource
# hares -delete resource
Note that deleting a resource won't take offline the object being monitored by the resource. The object remains online, outside the control and monitoring of VCS.
To unlink resources
# hares -unlink parent_resource child_resource
Note
You can unlink service groups and resources at any time. You cannot delete a service group until all of its resources are deleted.
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