hyperv: The memory value assigned ('4077' MB) is not properly aligned.

[Phydeauxman]

Unable to create minikube cluster on Windows 10 host.

Command run:
minikube start --driver=hyperv

The full output of the command that failed:

PS C:\WINDOWS\system32> minikube start --driver=hyperv
* minikube v1.8.1 on Microsoft Windows 10 Enterprise 10.0.18363 Build 18363
* Using the hyperv driver based on user configuration
* Downloading VM boot image ...
* Creating hyperv VM (CPUs=2, Memory=4077MB, Disk=20000MB) ...
* Downloading preloaded images tarball for k8s v1.17.3 ...
> preloaded-images-k8s-v1-v1.17.3-docker-overlay2.tar.lz4: 280.46 MiB / 499E0309 09:38:58.605779   11932 main.go:106] libmachine: [stderr =====>] : Hyper-V\New-VM : Failed to modify device 'Memory'.
Invalid memory value assigned for 'minikube'. Memory values must be properly aligned.
'minikube' failed to modify device 'Memory'. (Virtual machine ID 06BCBFDB-C000-4BF4-97BF-D16008DAC326)
Invalid memory value assigned for 'minikube'. The memory value assigned ('4077' MB) is not properly aligned. Try again with a memory value that is properly aligned. (Virtual machine ID
06BCBFDB-C000-4BF4-97BF-D16008DAC326)
At line:1 char:1
+ Hyper-V\New-VM minikube -Path 'C:\Users\byboudre\.minikube\machines\m ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (:) [New-VM], VirtualizationException
    + FullyQualifiedErrorId : InvalidParameter,Microsoft.HyperV.PowerShell.Commands.NewVM


    > preloaded-images-k8s-v1-v1.17.3-docker-overlay2.tar.lz4: 289.28 MiB / 499*
X Unable to start VM. Please investigate and run 'minikube delete' if possible: creating host: create: creating: exit status 1

The output of the minikube logs command:

E0309 09:47:40.432352   19896 main.go:106] libmachine: [stderr =====>] : Hyper-V\Get-VM : Hyper-V was unable to find a virtual machine with name "minikube".
At line:1 char:3
+ ( Hyper-V\Get-VM minikube ).state
+   ~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidArgument: (minikube:String) [Get-VM], VirtualizationException
    + FullyQualifiedErrorId : InvalidParameter,Microsoft.HyperV.PowerShell.Commands.GetVM


*
X command runner: getting ssh client for bootstrapper: Error creating new ssh host from driver: Error getting ssh host name for driver: Host is not running

The operating system version:
Windows 10 Pro Version 1909 Build 18363.657

[Phydeauxman]

This error was being caused by the fact that minikube was trying to create a VM with 4077 MB of memory. Hyper-V requires VMs to have memory in 2 MB increments. When specifying the amount of memory explicitly suing the --memory parameter, error went away and VM was successfully created.

[afbjorklund]

This is related to the brand new “dynamic memory” feature, minikube should probably round off the calculated values... And the Windows CI need some fixing too

[tstromberg]

The fix is shipping later this week with the next release. My apologies for all the users it has inconvenienced.