Managing HP Serviceguard A.11.20.20 for Linux, May 2013

4.2.2 Supported cluster configuration options
Following are the supported cluster configuration options when using VMWare or KVM guests as
cluster nodes:
• Cluster with VMware or KVM guests from a single host as cluster nodes (cluster-in-a-box; not
recommended)
NOTE: This configuration is not recommended because failure of the host brings down all
the nodes in the cluster which is a single point of failure.
• Cluster with VMware or KVM guests from multiple hosts as cluster nodes
• Cluster with VMware or KVM guests and physical machines as cluster nodes
NOTE:
• Guests running on different Hypervisor (VMware or KVM guests) must not be configured as
cluster nodes in the same cluster.
• Cluster with VMware from a single host as cluster nodes configuration must be avoided in
serviceguard-xdc environment. For more information about serviceguard-xdc support with
VMware virtual machines, see HP Serviceguard Extended Distance Cluster for Linux A.11.20.20
Deployment Guide.
• KVM guests cannot be used as cluster nodes in the serviceguard-xdc environment.
For more information about how to integrate VMware and KVM guests as Serviceguard cluster
nodes, see the following white paper at http://www.hp.com/go/linux-serviceguard-docs:
• Using HP Serviceguard for Linux with VMware Virtual Machines
• Using HP Serviceguard for Linux with Red Hat KVM Guests
4.3 Hardware Planning
Hardware planning requires examining the physical hardware itself. One useful procedure is to
sketch the hardware configuration in a diagram that shows adapter cards and buses, cabling,
disks and peripherals.
You may also find it useful to record the information on the Hardware worksheet (page 281) indicating
which device adapters occupy which slots and updating the details as you create the cluster
configuration. Use one form for each node (server).
4.3.1 SPU Information
SPU information includes the basic characteristics of the server systems you are using in the cluster.
You may want to record the following on the Hardware worksheet (page 281) :
Server Series Number Enter the series number, for example, DL980 G7.
Host Name Enter the name to be used on the system as the host name.
Memory Capacity Enter the memory in MB.
Number of I/O slots Indicate the number of slots.
4.3.2 LAN Information
While a minimum of one LAN interface per subnet is required, at least two LAN interfaces are
needed to eliminate single points of network failure.
HP recommends that you configure heartbeats on all subnets, including those to be used for client
data.
Collect the following information for each LAN interface:
4.3 Hardware Planning 81