HP CloudSystem Foundation Guide de l'utilisateur Page 103

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17 Compute node management
Once you have compute nodes or clusters created, you can bring them into CloudSystem for use
in the cloud you are creating for your end users. Use the information in this chapter to manage
the KVM compute nodes and ESX clusters in your virtual data center.
About Compute Nodes
A compute node provides the ephemeral storage, networking, memory, and processing resources
that can be consumed by virtual machine instances.
CloudSystem supports two types of compute nodes:
ESX clusters: Clusters are created in VMware vCenter Server. When the vCenter Server is
registered and configured in the CloudSystem Console, clusters can be imported from vCenter
Server and activated in the cloud.
KVM compute nodes: KVM compute nodes are created manually. Once created, the Cloud
Management Network enables the CloudSystem Console to see the KVM compute nodes.
When the CloudSystem Console detects a compute node, it is automatically added to the
Compute Nodes screen in an Unknown status.
Compute nodes in the cloud
Within a cloud environment, compute nodes form a core of resources. They supply the processing,
memory, network, and storage that virtual machine instances need. When an instance is created,
it is matched to a compute node with the available resources. A compute node can host multiple
instances until all of its resources are consumed.
Managing compute nodes
Activating an ESX cluster or a KVM compute node performs the configuration required to bring
the system into the cloud. This includes the following actions:
Activating an ESX cluster: Verifies virtual switch settings and notifies the vCenter Server proxy
appliance to start managing instances deployed on the cluster.
IMPORTANT: Do not activate an ESX cluster in more than one cloud.
Activating a KVM compute node: Installs agents, identifies network interfaces, and verifies the
operating system and the compute node status.
The Compute Nodes screen in the CloudSystem Console displays all available ESX clusters and
KVM compute nodes, along with their resources. You can perform the following tasks from this
screen:
Import an ESX cluster from vCenter Server.
Activate an ESX cluster or a KVM compute node.
Deactivate an ESX cluster or a KVM compute node.
Delete an inactive, previously imported ESX cluster or expire the DHCP lease on a KVM
compute node.
The CloudSystem Portal contains a Hypervisor tab, which allows administrators to see all activated
ESX clusters and KVM compute nodes, along with the number of instances attached to each.
Can I delete compute nodes from the cloud?
You can use the delete action to remove an imported ESX cluster, if it has been deactivated. Deleting
an inactive ESX cluster removes it from the Compute Nodes overview screen, but does not affect
About Compute Nodes 103
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