HP Global Workload Manager 7.0 User Guide

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Figure 3 Using gWLM with hosts separated by firewalls

vparA

mgmtA

vparB

mgmtB

vparC

mgmtC

vparD

mgmtD

Management LAN

Firewall

Public

network

Hostname

on public

network

Hostname on

management LAN

CMS

On the public network, the hosts can be accessed through their hostnames: vparA, vparB, vparC,

and vparD. However, they cannot access each other through those names.

Although gWLM might be able to discover the hosts and you can even configure an SRD including

the hosts, when you attempt to deploy the SRD, gWLM will eventually time out and display a blank

screen. No error message is displayed. However, there will be events from each managed node

similar to the following event:

gWLM Agent MySystem.MyDomain.com

Information Unable to manage the following hosts:

Associated Exception Unable to manage the following hosts: MySystem.MyDomain.com: The gWLM agent process on

the host is not running -- start the agent and retry.

If the environment allows, open ports on the firewalls between the CMS and managed nodes as

documented in the HP Matrix Operating Environment Software Version 4.1 Installation and Update

Guide for HP-UX section “Compatibility with HP-UX Bastille and Other Network Firewalls.” If

opening firewall ports on the primary LAN is not an option, use a secondary LAN to manage the

hosts.

NOTE: Each gWLM agent must be able to communicate with the CMS and with all the other

agents in the SRD.

A CMS can only manage hosts on the same LAN as the CMS itself. Thus, if you set up a separate

LAN (sometimes referred to as a management LAN or a backup LAN) that includes the CMS and

all the hosts to be managed, you can manage these hosts in a single SRD.

Figure 3 shows a management LAN in which the hosts are known as mgmtA, mgmtB, mgmtC, and

mgmtD. With this management LAN, gWLM can manage the hosts in a single SRD. Complete the

following procedure to set up gWLM to manage such hosts in an SRD:

1. For each host in the management LAN that you want to manage in an SRD:

a. Edit the /etc/opt/gwlm/conf/gwlmagent.properties file to include the following

property:

com.hp.gwlm.security.virtualLocalHostName=hostnameOnLAN

For example, with the host mgmtA, its property would be:

com.hp.gwlm.security.virtualLocalHostName=mgmtA

b. Restart gwlmagent on the host:

# /opt/gwlm/bin/gwlmagent --restart

Using gWLM with hosts on multiple LANs 41