rg_properties(5)

NAME | DESCRIPTION | SEE ALSO

NAME

rg_properties-– resource group properties

DESCRIPTION

The list below describes the resource group properties that are defined by Sun Cluster. RG_name is the only required resource group property.

Resource Group Properties and Descriptions

Auto_start_on_new_cluster (Boolean)

This property controls whether the Resource Group Manager starts the resource group automatically when a new cluster is forming. The default is TRUE.

If set to TRUE, the Resource Group Manager attempts to start the resource group automatically to achieve Desired_primaries when all the nodes of the cluster are simultaneously rebooted.

If set to FALSE, the Resource Group does not start automatically when the cluster is rebooted. The resource group will remain offline until the first time that it is manually switched online using scswitch(1M) or the equivalent GUI command. After that, it will resume normal failover behavior.

Default

TRUE

Tunable

Any time

Desired_primaries (integer)

The desired number of nodes that the group can run on simultaneously.

The default is 1. If the RG_mode property is Failover, the value of this property must be no greater than 1. If the RG_mode property is Scalable, a value greater than 1 is allowed.

Default

1, see above

Tunable

Any time

Failback (Boolean)

A Boolean value that indicates whether to recalculate the set of nodes where the group is online when the cluster membership changes. A recalculation can cause the RGM to bring the group offline on less preferred nodes and online on more preferred nodes.

Default

FALSE

Tunable

Any time

Global_resources_used (string array)

Indicates whether cluster file systems are used by any resource in this resource group. Legal values that the administrator can specify are an asterisk (*) to indicate all global resources, and the empty string ("") to indicate no global resources.

Default

All global resources

Tunable

Any time

Implicit_network_dependencies (Boolean)

A Boolean value that indicates, when TRUE, that the RGM should enforce implicit strong dependencies of non-network-address resources on network-address resources within the group. This means that the RGM starts all network-address resources before all other resources and stops network address resources after all other resources within the group. Network-address resources include the logical host name and shared address resource types.

In a scalable resource group, this property has no effect because a scalable resource group does not contain any network-address resources.

Default

TRUE

Tunable

Any time

Maximum_primaries (integer)

The maximum number of nodes where the group might be online at once.

The default is 1. If the RG_mode property is Failover, the value of this property must be no greater than 1. If the RG_mode property is Scalable, a value greater than 1 is allowed.

Default

1, see above

Tunable

Any time

Nodelist (string array)

A comma-separated list of cluster nodes where the group can be brought online in order of preference. These nodes are known as the potential primaries or masters of the resource group.

Default

The list of all cluster nodes in arbitrary order

Tunable

Any time

Pathprefix (string)

A directory in the cluster file system that resources in the group can write essential administrative files in. Some resources might require this property. Make Pathprefix unique for each resource group.

Default

The empty string

Tunable

Any time

Pingpong_interval (integer)

A non-negative integer value (in seconds) used by the RGM to determine where to bring the resource group online in the event of a reconfiguration or as the result of an scha_control giveover command or function being executed.

In the event of a reconfiguration, if the resource group fails to come online more than once within the past Pingpong_interval seconds on a particular node (because the resource's START or PRENET_START method exited non-zero or timed out), that node is considered ineligible to host the resource group and the RGM looks for another master.

If a call to a resource's scha_control command or function causes the resource group to be brought offline on a particular node within the past Pingpong_interval seconds, that node is ineligible to host the resource group as the result of a subsequent call to scha_control originating from another node.

Default

3,600 (one hour)

Tunable

Any time

Resource_list (string array)

The list of resources that are contained in the group. The administrator does not set this property directly. Rather, the RGM updates this property when the administrator adds or removes resources from the resource group.

Default

The empty list

Tunable

Never

RG_dependencies (string array)

A comma-separated list of resource groups that this group depends on. This list indicates a preferred order for bringing other groups online or offline on the same node. It has no effect if the groups are brought online on different nodes.

Default

The empty list

Tunable

Any time

RG_description (string)

A brief description of the resource group.

Default

The empty list

Tunable

Any time

RG_is_frozen (Boolean)

A Boolean value that indicates whether a global device on which a resource group depends is being switched over. If set to TRUE, the global device is being switched over. If set to FALSE, no global device is being switched over. A resource group depends on global devices as indicated by its Global_resources_used property.

The administrator does not set the RG_is_frozen property directly. Rather, the RGM updates the RG_is_frozen property when the status of the global devices changes.

Default

FALSE

Tunable

Never

RG_mode (enum)

Indicates whether the resource group is a failover or a scalable group. If the value is set to Failover, the RGM sets the Maximum_primaries property of the group to 1 and restricts the resource group to being mastered by a single node.

If the value of this property is set to Scalable, the RGM allows the Maximum_primaries property to be set to a value that is greater than 1, meaning that the group can be mastered by multiple nodes simultaneously.

---

Note –

The RGM does not allow a resource whose Failover property is set to TRUE to be added to a resource group whose RG_mode is Scalable.

---

Default

If Maximum_primaries is set to 1 when a resource group is created, RG_mode is set to Failover by default. If Maximum_primaries is set to a value that is greater than 1 when a resource group is created, RG_mode is set to Scalable by default. Once a resource group is created, you cannot change RG_mode, even if Maximum_primaries changes.

Tunable

At creation

RG_name (string)

The name of the resource group. This property is required and must be unique within the cluster.

Default

No Default

Tunable

At creation

RG_project_name (string)

The Solaris project name (see projects(1)) associated with the resource group. Use this property to apply Solaris resource management features such as CPU shares and resource pools to cluster data services. When the RGM brings resource groups online, it launches the related processes under this project name for resources that do not have the Resource_project_name property set (see r_properties(5)). The specified project name must exist in the projects database and the user root must be configured as a member of the named project (see projects(1) and System Administration Guide: Resource Management and Network Services).

This property is only supported starting in Solaris 9.

---

Note –

Changes to this property take effect after the resource has been restarted.

---

Default

Name of the system default project

Tunable

Any time

Valid value

Any valid Solaris project name

RG_state on each cluster node (enum)

Set by the RGM to Online, Offline, Pending_online, Pending_offline, or Error_stop_failed to describe the state of the group on each cluster node. A group can also exist in an unmanaged state when it is not under the control of the RGM.

This property is not user configurable.

Default

Offline

Tunable

Never

RG_system (Boolean)

If the RG_System property is TRUE for a resource group, then this resource group (and the resources that this resource group contains) is being used to support the cluster infrastructure, as opposed to implementing a user data service. If RG_System is TRUE for a resource group, then particular operations are restricted for the resource group and for the resources that the resource group contains. Only scrgadm(1M) and scswitch(1M) commands are affected by this property. scha_control(1HA) and scha_control(3HA) operations are not affected.

Before performing a restricted operation on a resource group (or a resource group's resources), the RG_System property of the resource group must first be set to FALSE. The restricted operations are listed below. Use care when modifying or deleting a resource group (or the resources that the resource group contains) that supports cluster services.

Restricted operations for a resource group when RG_System is set to TRUE are presented in the following table.

Operation	Example
Delete a resource group	scrgadm -r -g RG1
Edit a resource group property (except for RG_System)	scrgadm -c -t RG1 -y nodelist=...
Add a resource to a resource group	scrgadm -a -j R1 -g RG1
Delete a resource from a resource group	scrgadm -r -j R1 -g RG1
Edit a property of a resource that belongs to a resource group	scrgadm -c -j R1
Switch a resource group offline	scswitch -F -g RG1
Switch a resource group onto specified primaries	scswitch -z -g RG1 -h node1
Manage a resource group	scswitch -o -g RG1
Unmanage a resource group	scswitch -u -g RG1
Enable a resource	scswitch -e -j R1
Enable a monitor for a resource	scswitch -e -M -j R1
Disable a resource	scswitch -n -j R1
Disable a monitor for a resource	scswitch -n -M -j R1

If the RG_System property is TRUE for a resource group, the only property of the resource group that you can edit is the RG_System property itself. In other words, editing the RG_System property is never restricted.

Default

FALSE

Tunable

Any time

SEE ALSO

projects(1), scrgadm(1M), property_attributes(5), r_properties(5), rt_properties(5)

System Administration Guide: Resource Management and Network Services

Sun Cluster 3.1  Last Revised 3 Apr 2003

NAME | DESCRIPTION | SEE ALSO