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IP/MPLSView Linux OS High Availability Overview


The high availability feature uses computer clusters for providing failover and high availability services for IP/MPLSView. You can configure high availability for the application and database servers.

This chapter provides detailed instructions for installing and configuring high availability support for the Community Enterprise Operating System (CentOS) 6.6 and later 64-bit Linux operating systems with IP/MPLSView Release 6.3.0. CentOS is a free Linux distribution built from the open source code of Red Hat Enterprise Linux (RHEL).

High availability provides redundancy, reliability, and resiliency for packet-based communications to ensure service continuity in the event of a network outage or device failure. High availability provides both hardware-specific and software-specific methods to ensure minimal downtime and ultimately improve the performance of your network.

The following software components, which are part of the RHEL High Availability Add-On, are installed for high availability:

  • Resilient storage—Global File System 2 (GFS2) supports concurrent access.

  • High availability—The CentOS high availability add-on reduces application downtime, ensures that a cluster has no single point of failure, and isolates unresponsive applications and devices to prevent corruption of critical enterprise data.

  • High availability management—High availability service management, which is installed only on the management node, enables you to create and manage high-availability cluster services in a CentOS cluster.

Figure 1 shows a typical server setup for installing Linux high availability support for CentOS 6.6. Your setup can vary depending on the server and storage area network (SAN) vendor you are using.

The sample hardware setup consists of the following components:

  • Two 64-bit application servers (labeled APP1 and APP2)

  • Two database servers (labeled DB1 and DB2)

  • One management node (labeled MGMT)

  • One SAN (labeled Shared Storage)

  • One network (fiber) switch

Figure 1: Linux OS High Availability Hardware Setup
OS High Availability Hardware Setup