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Apache CloudStack Cloud Computing by Ravi Shankar, Navin Sabharwal

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CloudStack HighAvailabilityManager

CloudStack has a component called HighAvailabilityManager which provides the process for implementing high availability for the infrastructure. CloudStack HighAvailabilityManager provides a well-defined process and works with many other components of CloudStack to provide high availability features in CloudStack. The process of HighAvailabilityManager can be described in three simple steps; they are:

  • Investigation: Determining the state of the VM, like finding out whether the VM is up or down or it is impossible to determine its status.
  • Fencing: This fences the VM and restricts the usage of network or storage. This is done to prevent any corruption of the VM.
  • Start: Turns on the VM instances.

HighAvailabilityManager ...

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