vSphere Provider - Fix destroy when vm is powered off or has networks

This patch adds a wait when powering on a vm so setupVirtualMachine does
not return until the vm is actually powered on.  This allows other
functions to work off the assumption that the current state of the vm
is not in flux. During resourceVSphereVirtualMachineRead(), the wait for
IP would cause a hang for any VM with no network interfaces or for vms
that had been powered off for any reason.  This also means that the user
could not delete a vm with no network interfaces or that is powered off.
Checking power state before trying to check for network interfaces.
Resolves #7168

builtin/providers/vsphere/resource_vsphere_virtual_machine.go

@@ -619,7 +619,7 @@ func resourceVSphereVirtualMachineUpdate(d *schema.ResourceData, meta interface{
 		}
 	}
 
-	ip, err := vm.WaitForIP(context.TODO())
+	ip, err := vm.WaitForNetIP(context.TODO(), true)
 	if err != nil {
 		return err
 	}
@@ -897,14 +897,20 @@ func resourceVSphereVirtualMachineRead(d *schema.ResourceData, meta interface{})
 		return nil
 	}
 
-	var mvm mo.VirtualMachine
-
-	// wait for interfaces to appear
-	_, err = vm.WaitForNetIP(context.TODO(), true)
+	state, err := vm.PowerState(context.TODO())
 	if err != nil {
 		return err
 	}
 
+	if state == types.VirtualMachinePowerStatePoweredOn {
+		// wait for interfaces to appear
+		_, err = vm.WaitForNetIP(context.TODO(), true)
+		if err != nil {
+			return err
+		}
+	}
+
+	var mvm mo.VirtualMachine
 	collector := property.DefaultCollector(client.Client)
 	if err := collector.RetrieveOne(context.TODO(), vm.Reference(), []string{"guest", "summary", "datastore", "config"}, &mvm); err != nil {
 		return err
@@ -1040,11 +1046,15 @@ func resourceVSphereVirtualMachineRead(d *schema.ResourceData, meta interface{})
 		return fmt.Errorf("Invalid network interfaces to set: %#v", networkInterfaces)
 	}
 
-	log.Printf("[DEBUG] ip address: %v", networkInterfaces[0]["ipv4_address"].(string))
-	d.SetConnInfo(map[string]string{
-		"type": "ssh",
-		"host": networkInterfaces[0]["ipv4_address"].(string),
-	})
+	if len(networkInterfaces) > 0 {
+		if _, ok := networkInterfaces[0]["ipv4_address"]; ok {
+			log.Printf("[DEBUG] ip address: %v", networkInterfaces[0]["ipv4_address"].(string))
+			d.SetConnInfo(map[string]string{
+				"type": "ssh",
+				"host": networkInterfaces[0]["ipv4_address"].(string),
+			})
+		}
+	}
 
 	var rootDatastore string
 	for _, v := range mvm.Datastore {
@@ -1892,6 +1902,10 @@ func (vm *virtualMachine) setupVirtualMachine(c *govmomi.Client) error {
 
 	if vm.hasBootableVmdk || vm.template != "" {
 		newVM.PowerOn(context.TODO())
+		err = newVM.WaitForPowerState(context.TODO(), types.VirtualMachinePowerStatePoweredOn)
+		if err != nil {
+			return err
+		}
 	}
 	return nil
 }