NSX-T 3.x+ VM/Virtual Machine Tag Management

Add-NSXVMTags.ps1

#Requires -Module vmware.powercli
$VCCredential = Get-Credential
$NSXCredential = Get-Credential
$skipcertcheck = $true
$AuthMethod = “Basic"
$VCServer="0.0.0.0"
$NSXMgr=”0.0.0.0”
$apiendpoint = "/api/v1/fabric"
$base_url = ("https://" + $NSXMgr + $apiendpoint)
$tag = "Naka"
$scope = "NakaScope"  # If scope not required, simply define as $null or ""
$vmnamefilter = "nakabuntu" # Not required.  Will loop through all VM's otherwise.

Connect-VIServer $VCServer -Credential $VCCredential
$vms = Get-VM $vmnamefilter | Get-View -Property "Config"
# Add Tags to existing tags (Valid for NSX-T 3.1.2, previous versions only have update_tag)
$endpoint = "/virtual-machines"
$action = "add_tags"
Foreach ($vm in $vms)
{
    $vmid = $vm.Config.InstanceUuid
    If ([string]::IsNullOrWhiteSpace($Scope)){
    $JSON = "
    {
        `"external_id`":`"$vmid`",
        `"tags`": [
            {
                `"tag`":`"$Tag`"
            }
            ]
    }
    "
    }
    Else{
        $JSON = "
        {
            `"external_id`":`"$vmid`",
            `"tags`": [
                {
                    `"scope`":`"$scope`",
                    `"tag`":`"$Tag`"
                }
                ]
        }
        "
    }
    $Data = Invoke-restmethod -Uri ($base_url + $EndPoint + "?action=" + $action) -Method POST -Body $JSON -ContentType 'application/json' -Credential $NSXCredential -SkipCertificateCheck:$skipcertcheck -Authentication:$AuthMethod
}