Coyote Point Systems Equalizer Especificaciones descargar pdf (Pagina 348)

Automatic Cluster Responders

Overview

A Responder is a server-like object that can be associated with a Match Rule. It provides you with the ability to

cleanly load balance traffic where server pools associated with a cluster are not available to satisfy a client's

request. The feature extends Cluster Match Rules to allow them to specify a target Responder which is used to

provide a response to the client when the server pool in the match rule is not available. If an incoming request

matches a Match Rule expression and the server pool specified in the Match Rule is down, a Responder definition

in the Match Rule (if present) tells Equalizer to send one of two automatic responses to the client:

l A customized HTML “sorry page” that can, for example, ask the client to retry later or go to another

URL.

l A standard HTTP Redirect response that specifies a return code and redirect URL. When the client

receives this page, it is automatically redirected to the redirect URL. Redirect pages can be configured to

use parts of the request URL in the HTTP Redirect response (using a regular expression).

Note - Responder definitions are not automatically transferred between Failover pairs or amongst Envoy sites. This

means that Responders need to be created and maintained separately on each Equalizer in a Failover or Envoy

configuration.

Managing Responders

To display a list of all currently defined Responders, click Responders on the navigation pane on the left. Select

any of the Responders on the tree to display their configuration on the right pane.

l To add a Responder, you can either right click on the Equalizer icon at the top of the navigation pane on the

left and select Add Responder or right click on Responder at the bottom of the navigation pane and select

Add Responder.

l To edit a Responder’s configuration, you can either click no the specific Responder name on the

navigation pane on the left to display the configuration on the right.

l To delete a Responder, right click on the Responder name on the navigation pane on the left and select

Delete Responder A Responder cannot be deleted if it is currently used in a match rule definition.

Adding a Responder

Responders are a “global” resource: once created, they can be individually assigned to one or more match rules in

one or more clusters. Up to 8192 Responders can be created.

1. To create a Responder, you can either:

l Right click on the Equalizer icon at the top of the navigation pane on the left and select Add

Responder

l Right click on Responder at the bottom of the navigation pane and select Add Responder.

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Coyote Point Systems Equalizer Especificaciones Pagina 348