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Planning and Administering Data Services for Oracle® Solaris Cluster 4.4

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Updated: November 2019
 
 

Switching the Current Primary of a Resource Group

Use the following procedure to switch over a resource group from its current primary to another node that is to become the new primary.

How to Switch the Current Primary of a Resource Group


Note -  Perform this procedure from any cluster node.

Before You Begin

Ensure that the following conditions are met:

  • You have the following information:

    • The name of the resource group that you are switching over.

    • The names of the nodes where the resource group will be brought online or to remain online.

  • The nodes where the resource group is to be brought online or to remain online are in the cluster.

  • These nodes have been set up to be potential masters of the resource group that you are switching.

To see a list of potential primaries for the resource group, type the following command:

# clresourcegroup show -v
  1. On a cluster member, assume the root role that provides solaris.cluster.modify RBAC authorization.
  2. Switch the resource group to a new set of primaries.
    # clresourcegroup switch [-n nodelist] resource-group
    –n nodelist

    Specifies a comma-separated, ordered list of global-cluster nodes that can master this resource group. The resource group is switched offline on all of the other nodes.

    This list is optional. If you omit this list, the resource group is switched on all nodes in the resource group's node list.

    resource-group

    Specifies the name of the resource group to switch.


    Note -  If any resource group that you are switching declares a strong affinity for other resource groups, the attempt to switch might fail or be delegated. For more information, see Distributing Online Resource Groups Among Cluster Nodes.
  3. Verify that the resource group has been switched to the new primary.

    The output from this command indicates the state of the resource group that has been switched over.

    # clresourcegroup status
Example 20  Switching a Resource Group to a New Primary

This example shows how to switch the resource group resource-group-1 from its current primary phys-schost-1 to the potential primary phys-schost-2.

  1. To verify that the resource group is online on phys-schost-1, run the following command.

    phys-schost-1# clresourcegroup status
    
    === Cluster Resource Groups ===
    
    Group Name                   Node Name          Suspended        Status
    ----------                   ---------          ---------         ------
    resource-group1              phys-schost-1      No                Online
                                 phys-schost-2      No                Offline
  2. To perform the switch, run the following command.

    phys-schost-1# clresourcegroup switch -n phys-schost-2 resource-group-1
  3. To verify that the group is switched to be online on phys-schost-2, run the following command.

    phys-schost-1# clresourcegroup status
    
    === Cluster Resource Groups ===
    
    Group Name                   Node Name          Suspended        Status
    ----------                   ---------          ---------         ------
    resource-group1              phys-schost-1      No               Offline
                                 phys-schost-2      No               Online

See Also

The clresourcegroup(8CL) page.