Home > Articles > Programming > General Programming/Other Languages

  • Print
  • + Share This
Like this article? We recommend

Services

The primary purpose of the management server is to monitor and manage the cluster environment. The majority of the management server functions are beyond the normal management services associated with the Sun Cluster 3.0 software environment. You can supply these services to other systems as computing resources in the management server allow. The management server has enough CPU power and memory resources to consolidate logging messages from the cluster nodes and to implement the following services:
  • Sun Management Center software
  • SunPlex™ software
  • Sun StorEdge Component Manager™ software
  • Network Time Protocol (NTP)
  • AnswerBook2™ software
  • Sun Ray™ hardware
The Sun Cluster software cluster control panel (ccp) graphical user interface (GUI) is installed on the management server to enable easy access to the cluster node consoles. This GUI enables the SA to execute commands concurrently on all cluster nodes; however, it does not provide a management interface. The ccp works with a terminal concentrator (TC) to provide a seamless connection to serial port consoles. See the following figure for details. FIGURE 1 Connections Between the Management Server and Cluster Nodes For increased availability, the management server includes a second internal SCSI disk to mirror the boot drive. Mirroring using the Solaris Volume Manager software takes place automatically during the on-site configuration. To eliminate the need for a keyboard, mouse, and monitor, a TC connects the cluster nodes to the console port of the management server, thus providing console access to all cluster nodes.

Configuring the Management Server

You can configure the management server as a central repository for logs and messages (informational, warning, and error) for each cluster node; this configuration is similar to Sun Fire™ server domain logging by the System Service Processor. Modify the /etc/syslog.conf files on each cluster node to route system messages to the management server's SYSLOG service. This routing allows easy correlation of cluster node events over time to improve cluster management. In addition, you can review cluster node events on the management server when a cluster node is down. It is important to note that the management server itself does not constitute a critical component in the operation of a cluster. All cluster operations continue without impact if the management server fails. The default configuration for Sun Cluster 3.0 software has no dependency on it. In case of a management server failure, implement an alternative, operational procedure to access the system messages and console devices of servers to maintain serviceability of the cluster components. The Sun Management Center software has a log file filter that allows you to define patterns of messages that should be highlighted or ignored, and to quickly identify key messages in the midst of more routine informational messages. This log file filter enables easy analysis of the correlating log files. Every aspect of managing, securing, planning, and debugging a network involves determining when events happen. Time is the critical element that allows an event on one network node to be mapped to a corresponding event on another. In many cases, these challenges can be overcome by the enterprise deployment of the NTP service. The management server includes the xntpd(1M) daemon, which is bundled with the Solaris OE software to provide time synchronization services to all cluster nodes.
  • + Share This
  • 🔖 Save To Your Account