Adding a Node to a Resource Group

The procedure to follow to add a node to a resource group depends on whether the resource group is a scalable resource group or a failover resource group. For detailed instructions, see the following sections:

• How to Add a Node to a Scalable Resource Group

• How to Add a Node to a Failover Resource Group

You must supply the following information to complete the procedure.

• The names and node IDs of all of the cluster nodes

• The names of the resource groups to which you are adding the node

• The name of the IP Networking Multipathing group that is to host the network resources that are used by the resource group on all of the nodes

Also, be sure to verify that the new node is already a cluster member.

How to Add a Node to a Scalable Resource Group

Steps

1. For each network resource that a scalable resource in the resource group uses, make the resource group where the network resource is located run on the new node.

   See Step 1 through Step 5 in the following procedure for details.

2. Add the new node to the list of nodes that can master the scalable resource group (the nodelist resource group property).

   This step overwrites the previous value of nodelist, and therefore you must include all of the nodes that can master the resource group here.

   # scrgadm -c -g resource-group -h nodelist

   -c

   Changes a resource group

   -g resource-group

   Specifies the name of the resource group to which the node is being added

   -h nodelist

   Specifies a comma-separated list of the names of the nodes that can master the resource group

3. (Optional) Update the scalable resource's Load_balancing_weights property to assign a weight to the node that you are adding to the resource group.

   Otherwise, the weight defaults to 1. See the scrgadm(1M) man page for more information.

How to Add a Node to a Failover Resource Group

Steps

1. Display the current node list and the current list of IP Networking Multipathing groups that are configured for each resource in the resource group.

   # scrgadm -pvv -g resource-group | grep -i nodelist # scrgadm -pvv -g resource-group | grep -i netiflist

   ---

   Note –

   The output of the command line for nodelist and netiflist identifies the nodes by node name. To identify node IDs, run the command scconf -pv | grep -i node-id.

   ---

2. Update netiflist for the network resources that the node addition affects.

   This step overwrites the previous value of netiflist, and therefore you must include all of the IP Networking Multipathing groups here.

   # scrgadm -c -j network-resource -x netiflist=netiflist

   -c

   Changes a network resource.

   -j network-resource

   Specifies the name of the network resource (logical hostname or shared address) that is being hosted on the netiflist entries.

   -x netiflist=netiflist

   Specifies a comma-separated list that identifies the IP Networking Multipathing groups that are on each node. Each element in netiflist must be in the form of netif@node. netif can be given as an IP Networking Multipathing group name, such as sc_ipmp0. The node can be identified by the node name or node ID, such as sc_ipmp0@1 or sc_ipmp@phys-schost-1.

3. If the HAStorage or HAStoragePlus AffinityOn extension property equals True, add the node to the appropriate disk set or device group.

   • If you are using Solstice DiskSuite or Solaris Volume Manager, use the metaset command.

     # metaset -s disk-set-name -a -h node-name

     -s disk-set-name

     Specifies the name of the disk set on which the metaset command is to work

     -a

     Adds a drive or host to the specified disk set

     -h node-name

     Specifies the node to be added to the disk set

   • SPARC: If you are using VERITAS Volume Manager, use the scsetup utility.

     1. On any active cluster member, start the scsetup utility.

        # scsetup

        The Main Menu is displayed.

     2. On the Main Menu, type the number that corresponds to the option for device groups and volumes.

     3. On the Device Groups menu, type the number that corresponds to the option for adding a node to a VxVM device group.

     4. Respond to the prompts to add the node to the VxVM device group.

4. Update the node list to include all of the nodes that can now master this resource group.

   This step overwrites the previous value of nodelist, and therefore you must include all of the nodes that can master the resource group here.

   # scrgadm -c -g resource-group -h nodelist

   -c

   Changes a resource group

   -g resource-group

   Specifies the name of the resource group to which the node is being added

   -h nodelist

   Specifies a comma-separated list of the names of the nodes that can master the resource group

5. Verify the updated information.

   # scrgadm -pvv -g resource-group | grep -i nodelist # scrgadm -pvv -g resource-group | grep -i netiflist

Example 2–26 Adding a Node to a Resource Group

This example shows how to add a node (phys-schost-2) to a resource group (resource-group-1) that contains a logical hostname resource (schost-2).

# scrgadm -pvv -g resource-group-1 | grep -i nodelist
(resource-group-1) Res Group Nodelist:    phys-schost-1 phys-schost-3
# scrgadm -pvv -g resource-group-1 | grep -i netiflist
(resource-group-1:schost-2) Res property name: NetIfList
(resource-group-1:schost-2:NetIfList) Res property class: extension
(resource-group-1:schost-2:NetIfList) List of IP Networking Multipathing
interfaces on each node
(resource-group-1:schost-2:NetIfList) Res property type: stringarray
(resource-group-1:schost-2:NetIfList) Res property value: sc_ipmp0@1 sc_ipmp0@3
 
(Only nodes 1 and 3 have been assigned IP Networking Multipathing groups. 
You must add an IP Networking Multipathing group for node 2.)

# scrgadm -c -j schost-2 -x netiflist=sc_ipmp0@1,sc_ipmp0@2,sc_ipmp0@3
# metaset -s red -a -h phys-schost-2
# scrgadm -c -g resource-group-1 -h phys-schost-1,phys-schost-2,phys-schost-3
# scrgadm -pvv -g resource-group-1 | grep -i nodelist
(resource-group-1) Res Group Nodelist:     phys-schost-1 phys-schost-2
                                           phys-schost-3
# scrgadm -pvv -g resource-group-1 | grep -i netiflist
(resource-group-1:schost-2:NetIfList) Res property value: sc_ipmp0@1 sc_ipmp0@2
                                                          sc_ipmp0@3