User`s guide

Extended Functionality
Eaton Intelligent Power Manager (IPM) User’s Guide v1.40 P-164000289—Rev 2 131
The Distributed Power Manager (DPM) application helps to maximize data center electrical power efficiency. It
checks DRS for physical server utilization and then, using vMotion, moves VMs to servers in order to fully
unload servers, idle them, or power them down for maximum power savings.
Eaton uses the same vMotion capability when a UPS is in a critical power situatio
n to move VMs off of a server
that has a critical power situation. Eaton IPM then writes alarms/alerts into vCenter, which, in turn, triggers
vMotion.
VMware uses the term “setting a server into Mainte
nance mode” to trigger the vMotion. It is called this
because before performing maintenance on server, the data center manager needs to clear the VMs from the
server.
Understanding Maintenance Mode
Both standalone hosts, and hosts within a cluster, support the maintenance mode. Only VMware ESX/ESXi
Server 3.0 and later supports maintenance mode for standalone hosts.
A host enters or leaves maintenance mode only as the result of a user request. If the host is in a cluster when
it enters maintenance mode, the user is given the option to evacuate powered-off VMs. If this option is
selected, each powered-off VM is migrated to another host, unless there
is no compatible host available for the
VM in the cluster. While in maintenance mode, the host does not allow deployment or “power-on” of a VM.
VMs that are running on a host entering maintenance mode need to be either migrated to another host or shut
down (either manually or automatically by DRS).
When no more operating VMs are on the host, the host's i
con changes to include 'under maintenance'
designation and the host's Summary panel indicates the new state. The default automation mode of a VM
dete
rmines its behavior when the host (in a DRS cluster) it is running on enters maintenance mode:
l
Any fully automated VM is migrated automatically.
l
For a partially automated or manual VM, a recommendation for further action is generated and displays.
Configuring Maintenance Mode Behavior in vCenter
To configure the maintenance mode feature behavior, enable the DRS in “Fully Automated” automation level
with following steps:
1. Open the vCenter server in a vSphere client.
2. Right-click and select Cl
uster > Edit Setting > Turn on VMware DRS. Click Next and accept all default
values.
NOTE With this example, you choose to move all the VMs from this server to another
server of the same cluster. You can also define other behaviors according to your
needs
Configuration Test
To test the installation, please perform a power failure on the UPS and check on vSphere client that the
corresponding ESX/ESXi host enters in Maintenance mode after the “Maintenance mode timer.”
VMware vCenter High Availability
After the High Availability (HA) Cluster feature is enabled, VMware disables the automatic startup and
shutdown functionality when a Hypervisor is shut down.
Eaton IPM features for HA mode are as follows:
l
Eaton IPM continues to move the VM from one server to the others, if all servers are powered by different
UPSs with different power source (see Figure 145).