Chapter 7. Administering The Cluster 1350; Using The Remote Power Command; Remote Console; Shutting Down The System Components - IBM eserver Cluster 1350 Installation And Service Manual

Chapter 7. Administering the Cluster 1350

This chapter includes information about:
v accessing the cluster from a remote location
v accessing each node before the operating system is installed
v shutting down the system components
v finding information about a lights out or brown out event
For more information about monitoring, remote control, set-up, and technical
references, see: http://www.ibm.com/servers/eserver/clusters/library/linux.html

Using the remote power command

Using the command rpower starts and resets hardware, powers hardware on and
off, and queries the node power state. The syntax is: rpower [-a] [-h] [-n
host[,host...]] [-N Node_group[,Node_group...]] [-v] on | off | reboot | query |
resetsp

Remote console

The remote console function uses the serial ports of xSeries 335 servers and
terminal servers. The serial ports provide remote access to nodes before the
operating system is installed or when network access to the servers is unavailable
or has failed. The terminal servers must be included to enable the remote console
function.
Each rack in the configuration includes one or two terminal servers to connect each
node in the rack through a DB9 to RH45 serial cable. The terminal servers are LAN
connected to the Management VLAN.
The remote console function is accessed through the rconsole command. This
command opens a remote console session for any cluster node. The syntax is:
rconsole [-a] [-h] [-n host[,host...]] [-N Node_group[,Node_group...]

Shutting down the system components

Because the operating system is installed on each node, the procedures to shut
down the nodes are relatively simple. Complete the following steps to shut down
the cluster nodes:
1. Log off the cluster nodes and the storage nodes.
2. To turn the cluster nodes off with Cluster System Management (CSM) installed
3. Turn off the power for the following devices:
4. Turn off the power switch for the power distribution units or unplug, from the
© Copyright IBM Corp. 2004
on the management node, at the command prompt, type
rpower off -A
Note: If CSM is not installed on the management node, turn off the power
switch for each individual cluster node.
v storage nodes
v management node
v storage controllers
v storage expansion units
power distribution unit, the devices that have no power switch.
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