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If Envoy is enabled, the following DNS status information is displayed at the bottom of the
Current Status section:
DNS Requests Received—the total number of DNS requests received.
Corrupt DNS Requests Received—the number of invalid DNS requests received.
DNS Requests Received for Unknown Domains—the number of unrecognized DNS
requests received.
Displaying the Cluster Summary
The Cluster Summary lists the currently configured clusters and their associated servers as
well as the weight and status of each server.
To view the Cluster Summary:
1.
Log into the Equalizer Administration interface with view or edit access.
2.
Select Cluster Summary from the View menu in the main menu bar. The Cluster
Summary is displayed in the right frame.
Figure 23 Viewing cluster summary information
This summary displays the status at the time the page was loaded. To set this information
to automatically refresh, select a refresh interval and click the Set button.
The cluster summary lists the configured clusters and the status of each server in the
cluster:
Servers shown in green are currently active.
Servers shown in yellow are configured as hot spares.
Servers shown in red are down. Equalizer monitors the status of active servers by
periodically probing the IP address and Port specified by the server endpoint. If these
probes fail two consecutive times, it marks the server down and stops routing new
requests to that server. A server probe might fail even if the server machine is up and
running. For instance, if the HTTP server daemon fails on a server machine, Equalizer
will refuse connections to that endpoint.
Equalizer periodically queries servers that have gone down to determine if they have
become available again. When a server comes back online, Equalizer begins to route
requests to the server, slowly increasing the server's weight to its full capability.
Equalizer Installation and Administration Guide
Monitoring Equalizer Operation
39
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