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We run a VMWare data center with vCenter 6. We recently enabled High Availability on a 3-host cluster in our test environment.

If one cluster fails, the other 2 don't have the resources to take on all of the failed-over VMs. Some of them will remain powered off. Is it possible to prioritize which VMs fail over first?

For example, say a host hold a Windows domain controller, a Git repository, and a Windows deployment server. If that host fails, we definitely want DC and Git online right away. We're not worried if the deployment server stays offline.

In that scenario, how would we ensure the DC and repo get a higher priority than the deployment server?

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  • In the vCenter GUI, select your cluster.
  • In the Configure tab, select VM Overrides.
  • Select Add.

Repeat until you're happy:

  • Select an important VM and Next.
  • In the Add VM override dialog, check VM Restart Priority and select High or Highest, making sure that Start next priority VMs when defaults to Resources allocated.
  • Confirm the changes.

OR

  • Select an unimportant VM and Next.
  • In the Add VM override dialog, check VM Restart Priority and select Low or Disabled, making sure that Start next priority VMs when defaults to Resources allocated.
  • Confirm the changes.
  • (...But it is better to have "n+1" resources if you can afford it, of course...) – Mikael H Dec 23 '19 at 14:10

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