New VM to Host Affinity Rule.

So you want to Pin a VM to a host huh?
Maybe for some network mirror or span port entertainment?

Here is how you do it pcli style:

#set your vars:

$thecluster = “pcli-cluster1”
$thevmhost = “esx1.pcli.me”
$thevm = “vm1”
$VMGroupName = “MyVMGroupName”
$HostGroupName = “MyHostGroupName”
$rulename = “MyAffinityRuleName”

#paste the code:

#VMGroup
$cluster = Get-Cluster $thecluster | Get-View
$spec = New-Object VMware.Vim.ClusterConfigSpecEx
$group = New-Object VMware.Vim.ClusterGroupSpec
$group.operation = “add”
$group.Info = New-Object VMware.Vim.ClusterVmGroup
$group.Info.Name = $VMGroupName
Get-VM -Name $theVM | %{$group.Info.VM += $_.Extensiondata.MoRef}
$spec.GroupSpec += $group
$cluster.ReconfigureComputeResource_Task($spec,$true)
#HostGroup
$spec = New-Object VMware.Vim.ClusterConfigSpecEx
$group = New-Object VMware.Vim.ClusterGroupSpec
$group.operation = “add”
$group.Info = New-Object VMware.Vim.ClusterHostGroup
$group.Info.Name = $HostGroupName
Get-VMHost -Name $TheVMHost | %{$group.Info.Host += $_.Extensiondata.MoRef}
$spec.GroupSpec += $group
$cluster.ReconfigureComputeResource_Task($spec,$true)
#Make the Rule
$spec = New-Object VMware.Vim.ClusterConfigSpecEx
$rule = New-Object VMware.Vim.ClusterRuleSpec
$rule.operation = “add”
$rule.info = New-Object VMware.Vim.ClusterVmHostRuleInfo
$rule.info.enabled = $true
$rule.info.name = $RuleName
$rule.info.mandatory = $true
$rule.info.vmGroupName = $VMGroupName
$rule.info.affineHostGroupName = $HostGroupName
$spec.RulesSpec += $rule
$cluster.ReconfigureComputeResource_Task($spec,$true)

I’m sure someone can reduce the code but I left it broken out here to provide the section view.
IE : If you only want to create a Host group, take the middle part of the script.