Chapter 2 57
Installing ITO Agents on the Managed Nodes
General Installation Tips for Managed Nodes
• Pre-installation tasks
• Problems with IP aliases in AIX OS
• Installing AIX HACMP agents
ITO Agents in the HACMP Environment
Each node in an HACMP cluster has its own ITO agent and must be
accessible on a fixed IP address, which represents the node in the ITO
Node Bank. This IP address must always remain bound to the same
node. Consequently, IP addresses which are subject to change cannot be
used to install and run an ITO agent running HACMP.
If an additional adapter (network interface card) with a fixed IP address
that is not used by HACMP (as a boot, service or standby adapter) is
available on an HACMP node, it can be used for ITO Agent installation.
However, communication with the ITO server must be possible via this
additional adapter. There is no need to set up IP aliases or modify shell
scripts in this case, and all pre-installation tasks can be skipped. But it is
important that the IP address on this adapter does not change.
If no such adapter is available, each node should be assigned an IP alias
in the same network in which the boot and service IP addresses reside.
In addition, the node must be configured in such a way that this IP alias
address is assigned to the service adapter as an alias for the boot IP
address. Once a fixed IP address or an IP alias is available on a node,
that address must be used to install the ITO agent on the node. After
successful installation of the ITO agent, the IP alias is present in the
/var/lpp/OV/conf/OpC/nodeinfo file in the field OPC_IP_ADDRESS.
To avoid confusion with any other IP addresses that may be set on the
interface or with messages in the Message Browser originating from
addresses other than the service address of the node, the following
naming scheme is recommended in your HACMP environment:
<nodename>_boot for the node’s boot address
<nodename>_svc for node’s service address
<nodename>_stdby for node’s standby address
<nodename>_ito for the node’s IP alias
Where <nodename> is the name of the node as defined in the HACMP
configuration.
