Mastering VMware vSphere 6.7 by Nick Marshall & Mike Brown & G. Blair Fritz & Ryan Johnson

Author:Nick Marshall & Mike Brown & G. Blair Fritz & Ryan Johnson
Language: eng
Format: epub
ISBN: 9781119512974
Publisher: Wiley
Published: 2018-09-04T00:00:00+00:00

VIRTUAL MACHINE COMPONENT PROTECTION

The previous section discussed the behavior of HA under various scenarios. Primarily, these are focused on either a total outage of the host, or the loss of network connectivity. Although this is a great capability, scenarios such as loss of storage due to an all paths down (APD) or permanent device loss (PDL) event cannot be addressed without additional functionality. Enter Virtual Machine Component Protection (VMCP).

VMCP was introduced as part of vSphere HA in vSphere 6.0. Its purpose is to detect storage access failures and allows for a user-configurable automated response for affected virtual machines, including alerts and HA initiated restarts.

It stands to reason that if you are relying on HA to restart affected VMs there will be different outcomes based on the configuration settings. Table 7.1 shows the different responses from VMCP that can be configured in an APD or PDL event.

TABLE 7.1: VMCP failure responses

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