VM Uptime

http://virtual-red-dot.info/vm-availability-monitoring/

The up time of a VM is more complex than that of a physical machine. Just because the VM is powered on, does not mean the Guest OS is up and running. The VM could be stuck at BIOS, Windows hits BSOD or Guest OS simply hang. This means we need to check the Guest OS. If we have VMware Tools, we can check for heartbeat. But what if VMware Tools is not running or not even installed? Then we need to check for sign of life. Does the VM generate network packets, issue disk IOPS, consume RAM?


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