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Foglight for Virtualization Enterprise Edition 8.6 - High Availability Field Guide

Configuring the cluster multicast port used in HA mode

You can change the cluster multicast port that is used when Foglight™ is running in High Availability (HA) mode. This port is used by members of an HA cluster to communicate with each other. The primary and secondary Management Servers within each HA partition must be configured to use the same cluster multicast port.

If you plan to have multiple HA partitions on the same sub-network, configure a different cluster multicast port for each HA partition on the sub-network.

Open the file <foglight_home>/config/server.config on each machine hosting a Management Server that is part of the HA cluster.
Set the parameter server.cluster.mcast_port to the desired value in these files.
Save the server.config files.

Important considerations for configuring HA over WAN

Although HA outside of a single subnet (that is, across a WAN) is a supported configuration, it is important to first understand the performance and reliability implications of using this configuration.

Before distributing a Foglight™ HA installation across data centers, consider the following:

For more information, see Troubleshooting FAQ , and Tuning connection issues in HA implementations .

Exploring the High Availability view

The High Availability View, located on the Management Server Administration dashboard, indicates if Foglight™ is running in High Availability (HA) mode.

This view displays the following information:

Status shows if Foglight is running in HA mode () or not ().
Peers shows the number of servers in the cluster, not including the current server.

Configuring Foglight Agent Manager for HA mode

The Foglight™ Agent Manager client fully supports communicating with a Management Server HA cluster. During Agent Manager installation, you can configure multiple HA URLs for the upstream Management Server. In addition, if you connect to the active Management Server in an HA cluster, the Agent Manager installer can automatically query for and configure the other HA peer URLs. This ensures that, if the active (primary) Management Server fails over to an HA peer (secondary server), the Agent Manager clients will connect to the new active peer seamlessly.

For more information about installing and configuring the Agent Manager, see the Foglight Agent Manager Installation Guide.

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