As you modify a host group, be aware of the following:
Before removing a host from a host group, you should move or migrate the host’s workloads to another host in the group.
Do not remove all hosts from a host group if the host group is assigned business service workloads. The workloads continue to run on the assigned hosts until the workloads are restarted. At that time, the workloads remain in a provisioning state because there are no hosts on which to run them.
Changing the cost of the host group resources might impact the cost of business services currently deployed in the host group. For more information, see Section 26.0, Configuring the Workload Update Schedule.
To modify a host group:
In the Cloud Manager console, click , then click the tab.
Select the host group you want to modify, then click .
In the fields, modify the following information for the host group:
Name: Specify a name for the group. The name should be different than any other host group name. This name is seen only by you and other Novell Cloud Manager administrators.
Zone: Displays the zone whose hosts you can add to the group. You cannot change this setting.
Hypervisor: Displays the hypervisor technology for the group’s hosts. You cannot change this setting.
Description: Provide any additional information for the host group.
In the fields, define the monthly costs associated with the host group resources:
vCPU: Specify the cost per virtual CPU.
Memory: Specify the cost per megabyte (MB) of memory.
Disk: Specify the cost per gigabyte (GB) of disk space.
Network: Specify the cost per network interface.
In the field, select the maximum number of virtual CPUs allowed for each host.
For example, if you select 32, the total vCPUs for all workloads running on a host cannot exceed 32.
Add hosts to the group:
In the list, click to display the Add Hosts dialog box.
The list displays all available hosts in the zone that meet the selected hypervisor criteria. Hosts that are already assigned to another host group are not displayed.
Select the hosts.
You can Shift-click and Ctrl-click to select multiple hosts.
For VMware and Xen clusters, only the cluster is listed; you must add the cluster to the host group. For Hyper-V, both the cluster and its member hosts are listed; in addition to adding the cluster to the host group, you must add the member hosts.
Click to add the selected hosts to the list.
Remove hosts from the group:
In the list, select the hosts to remove.
You can Shift-click and Ctrl-click to select multiple hosts.
Click .
IMPORTANT:When you add a host to a group, the host’s vmhost.vcpu.max fact is set to the host group’s number. For example, if the setting is 16 (so that each host supports a maximum of 16 vCPUs), the host’s vmhost.vcpu.max fact is set to 16.
When you remove a host, the fact is not reset. If you want to change the maximum number of vCPUs for the host, you need to manually edit it’s vmhost.vcpu.max fact. For instructions, see Configuring vCPUs on VM Hosts
in the PlateSpin Orchestrate 2.6 Development Client Reference.
This applies only to standalone hosts, not to clusters.
Click .