Check for sufficient free space in the datastore prior to taking a vm snapshot about puppet-patching HOT 1 OPEN

Great idea!

I'm thinking of having a task that finds all of the VMs then performs the check you described.

Worst case scenario, the VM could grow to 2x the size of its original disks. This might not be ideal though because then all of your datastores will need to be, worst case, 50% consumed.

I'm thinking a more generalized approach could be used where we allow the user to specify an estimation factor the be used when calculating the required space. This would be a number >= 1.0.

For example, if i wanted to account for 2x the space i would use a factor of: 2.0

If i wanted to use something a little less i might specify a factor of: 1.5 or maybe 1.25

This would expect the VM to grow, but not double in size.

The other caveat here is that VMs and disks can potentially live on different datastores but the snapshot is always created on the datastore where the VMX file lives, need to take that into account.

from puppet-patching.