High Availability Check

Introduction

The High Availability Check!! monitors two AnywhereNow Application Servers and automatically starts the Unified Contact Center services on the passive server if the service is no longer running on the active server. Optionally, an email can be sent if one of the two servers is taking over the role of active AnywhereNow Application Server.

Limitations

The High Availability Check!! only works when both AnywhereNow Application Servers are installed in a single /Skype for- Business Trusted Application Pool. If the AnywhereNow Application Servers are installed in separate Skype-for-Business Trusted Application Pools the Disaster Recovery Scenario should be followed instead. Also, the script will only work if both AnywhereNow Application Servers can be pinged. If this is not the case the script stops, and optionally sends an email to notify that the AnywhereNow Application Servers cannot be pinged and network connectivity should be checked. Finally, make sure the Recovery options for the Unified Contact Center service on both the active and the passive AnywhereNow Application Server are turned off.

Scenario 1 Lowest Footprint

In this scenario the passive AnywhereNow Application Server monitors the active Application Server. As soon as the passive AnywhereNow Application Server detects the Unified Contact Center service on the active Application Server is not running it will take over. From this moment on, the former active AnywhereNow Application Server, will become passive, and starts monitoring the former passive Application Server.

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Scenario 2: Using a Witness

In this scenario, there is a third server, that is not an AnywhereNow Application Server. This so-called Witness Server, monitors both the active AnywhereNow Application Server as well as the passive AnywhereNow Application Server. The benefit of this scenario is that network connectivity will not interfere with the decision to take over the Unified Contact Center service from the active to the passive server. As soon as the Witness Server detects the Unified Contact Center service on the active AnywhereNow Application Server is not running it will start the service on the passive AnywhereNow Application Server and vice versa.

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