HP UX 11i Workload Management (gWLM/WLM) Software Incorrectly configured host name or IP address

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This issue is most often a concern when a host is connected to both of the following items:

•A corporate LAN/WAN via one network interface card and IP address

•A second, private internal network and private IP address for communicating with a certain other set of hosts (such as cluster members)

Global Workload Manager attempts to detect and report network configuration issues that can cause undesirable behavior, but in some cases this detection occurs in a context that can be reported only into a log file.

Workaround

If you encounter some unexpected behavior (such as a gWLM agent that fails to update or report the status of its workloads), inspect the /var/opt/gwlm/glwmagent.log.0 file on the host for errors.

Incorrectly configured host name or IP address

You might see the following message in a log file (gwlmagent.log.0 or gwlmcmsd.log.0):

Unable to determine the network address and/or hostname

of the current host. This indicates a mis-configured network and/or a host name resolution issue for this host. For troubleshooting information, see the HP Matrix Operating Environment Release Notes and search for this message.

The most common cause for this error is a problem in the host name configuration file in /etc/ hosts (or equivalent on Windows) or incorrect settings of the /etc/nsswitch.conf file (HP-UX only).

Background information

gWLM is not a simple client/server application. It involves:

•Multiple managed-node “servers” (the set of gWLM agents in an SRD are all peer servers that cooperatively manage the SRD)

•The CMS management server handling configuration and monitoring

Under normal operation, all of these components need complete connectivity. At a minimum, gWLM requires that each host have a primary IP address/host name that is reachable from every other interacting gWLM component--the CMS and all gWLM agents in a single SRD. (gWLM agents in multiple SRDs need not have connectivity within undeployed SRDs.)

By default, gWLM uses the primary IP address/host name for a given host. However, you can set up a management LAN. To use other IP addresses/host names, see “Using gWLM with Hosts on Multiple LANs” (page 47).

Workaround

Correct the configuration of the host so that:

•The primary fully qualified domain name can be properly resolved (by DNS or by configuration files)

•The IP address and primary fully qualified domain name are consistent for the host—and do not resolve to a local-host address (for example, 127.0.0.1)

The procedure below explores one way to check the host's configuration.

1.Run the vseassist tool to perform initial network configuration checks.

2.To validate proper configuration on HP-UX, try the following steps: a. Get the current host name using the hostname command:

[mysystem#1] > hostname mysystem

b.Get the IP address configured for the host using nslookup:

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Contents HP Global Workload Manager 7.4 User Guide Acknowledgements Contents Support and other resources Additional configuration and administration tasksIndex Comparison of PRM, WLM, and gWLM features Benefits of using gWLMOverview GWLM OverviewScheduler fss group. gWLM manages a workload by Concepts and terms for using gWLMWould make for a workload-without actually affecting SRD GWLM management modelHow gWLM allocates CPU resources Assumptions Available interfacesFinding more gWLM information Where to find additional informationLearn about other gWLM commands Policy types Configuring gWLM to manage workloadsPolicy types Choosing a policy type Choosing a policy typeSeeing how gWLM will perform without affecting the system Using the wizardGetting started with gWLM Combining the different policy types# /opt/gwlm/bin/gwlmagent Seeing gWLM in action# perl -e ’print $$\nwhile 1 ’ & 1 Fixing the amount of CPU resources a workload gets Common uses for gWLMSetting up gWLM initial setup steps Common configuration tasksCreating a new policy Changing from advisory mode to managed modeChanging which policy is associated with a workload Editing a policyStop managing a workload Adding a new compartment or GiCAP group member to an SRDStop managing an SRD Quick Link Option Monitoring workloads and gWLM Viewing gWLM reports in monitor-Only modeMonitoring workloads High-Level viewMessage logs Monitoring gWLM from the command lineHP-UX /var/opt/gwlm/gwlmcommand.log.0 Monitoring gWLM with GlancePlus Viewing HP Systems Insight Manager eventsGeneral security topics SecuritySecuring gWLM communications Securing database communicationsSecurity Manually adjusting CPU resources Additional configuration and administration tasksSetting aside space for historical data Manually adjusting memory resourcesSetting database recovery model Setting cache size for historical configuration dataCreating a database maintenance plan Tips for backup and restoreCMS properties Setting gWLM propertiesSetting gWLM properties Agent properties # Severe # Warning # Info # Config # Fine # Finer # Finest Communications ports Controlling gWLM’s startup behavior# /opt/gwlm/bin/gwlmagent --enablestartonboot Related events How the automatic restart worksNode Failed to Rejoin SRD on Start-up event Manually clearing an SRD# gwlm undeploy --srd=SRD--force Nested partitions Nesting partitionsChanging the interval on the command line Using gWLM with Hyper-ThreadingChanging the gWLM resource allocation interval Changing the interval in HP System Insight ManagerShows a possible scenario Using gWLM with hosts on multiple LANsMultiple network interface cards Creating Golden ImagesGet the IP address configured for the host using nslookup Incorrectly configured host name or IP addressEnabling or disabling dumping core for gWLM Unable to create new native threadCore dump file is available in root directory Subscription service How to contact HPSupport and other resources Information to collect before contacting HPRelated information HP authorized resellersTypographic conventions User input Documentation feedback Compatibility with agents Limitations Global Workload Manager known issuesCompatibility with PRM and WLM Unable to build a single shared resource domainRare incompatibility with virtual partitions Making a configuration change to a large SRD is slowHost name aliases are not supported Integrity VM prevents discovery of psets and fss groups Deleting workloads takes a long timeProcess placement using psrset is ignored Information error during shutdownCustom metrics lost on redeploy Major issues Remove old configuration data from the gWLM database Documentation or minor issuesCMS is slow to respond Cell-local processors and iCAP environmentCombining psets and virtual partitions Error during discovery of compartmentsModifying Java while gWLM is running Sample missing at start or end of gwlmreport output Missing or unexpected historical data system clocks differOnly one SRD is allowed to be deployed SRD deployment times out and displays a blank screen Processes moved to default pset or default fss groupApplication hangs in fss group Scripts not placed in correct workloadsChanges in sizes in Discovery Configuration of agent and CMS not synchronizedUnable to remove workload from nested partitions SRD Negative current size for Nonvm Missing historical data gWLM CMS daemon/service restartedUnmanaging a VM or vPar that is on leaves SRD undeployed SRD IndexIndex

UX 11i Workload Management (gWLM/WLM) Software specifications

HP-UX 11i Workload Management (gWLM/WLM) software is an integral component of HP's premier UNIX operating system, designed to enhance system performance and resource management across diverse workloads. This advanced tool allows system administrators to monitor, control, and allocate resources effectively to achieve optimal performance, reliability, and service levels in enterprise environments.

One of the main features of gWLM/WLM is its ability to classify workloads and manage them according to specific policies set by the administrator. By using service level objectives (SLOs), administrators can define the performance criteria for various applications and workloads. gWLM continuously tracks these workloads, ensuring that they adhere to the defined SLOs, thus maintaining a high level of application performance.

The software employs resource pools, which segment resources such as CPU, memory, and I/O bandwidth among different workloads based on predefined priorities. This capability ensures that critical applications receive the resources they require, even during peak usage periods, thereby preventing resource starvation that could lead to system slowdowns or crashes.

Another significant characteristic of gWLM/WLM is its real-time monitoring and reporting capabilities. The software provides detailed insights into resource utilization, workload performance, and system health. Administrators can access this information through a user-friendly interface, allowing for informed decision-making and proactive management.

Integration with HP Serviceguard adds another layer of functionality, enabling high availability for critical applications. gWLM can orchestrate workload migration to ensure that service levels are maintained, even in the event of hardware failures or resource contention.

The technology behind gWLM/WLM is built on advanced algorithms that leverage historical data and predictive modeling to optimize resource allocation dynamically. This means that as workloads change, the system can automatically adjust resource distribution to meet performance targets without the need for constant manual intervention.

gWLM also supports integration with various enterprise management tools, enabling administrators to implement comprehensive monitoring and management strategies across the IT infrastructure. The scalability of gWLM allows organizations of all sizes to benefit from its robust workload management features, ensuring that they can adapt to changing demands in their operational environments.

In summary, HP-UX 11i Workload Management software offers a sophisticated solution for optimizing resource utilization, managing workloads effectively, and maintaining high performance in complex enterprise environments. Its comprehensive features and technologies make it an essential tool for any organization seeking to enhance their IT operations.
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