The Take Snapshots of All Virtual Machines in a Resource Pool workflow requires the following input and output parameter bindings. You also define the JavaScript functions for the scriptable task elements.

In cases in which you bind to existing parameters, the binding inherits the type and description values from the original parameter.

The Initializing scriptable task element initializes the attributes of the workflow. The following table shows the input and output parameter bindings that the Initializing scriptable task element requires.

The Initialize scriptable task element performs the following scripted function.

//Retrieve an array of virtual machines contained in the specified Resource Pool
allVMs = resourcePool.vm;
//Initialize the size of the Array and the first VM to snapshot
if (allVMs!=null && allVMs.length!=0) {
	numberOfVms = allVMs.length;
	vm = allVMs[0];
} else {
	numberOfVms = 0;
}
//Initialize the VM counter
vmCounter = 0;
//Initializing the array of VM snapshots
snapshotVmArray = new Array();

The VMs to Process? decision element determines whether any virtual machines of which to take snapshots exist in the resource pool. The following table shows the bindings that the VMs to Process? decision element requires.

The Pool Has No VMs scriptable task element logs the fact that the resource pool contains no eligible virtual machines in the Orchestrator database. The following table shows the bindings that the Pool Has No VMs scriptable task element requires.

The Pool Has No VMs scriptable task element performs the following scripted function.

//Writes the following event in the vCO database
Server.warn("The specified ResourcePool "+resourcePool.name+" does not contain any VMs.");

The Remaining VMs? custom decision element determines whether any virtual machines of which to take snapshots remain in the resource pool. The following table shows the bindings that the Remaining VMs? custom decision element requires.

The Remaining VMs? custom decision element performs the following scripted function.

//Checks if the workflow has reached the end of the array of VMs
if (vmCounter < numberOfVms) {
	return true;
} else {
	return false;
}

The getVMDisksModes action element obtains the modes of the disks running in a virtual machine. The following table shows the bindings that the getVMDisksModes action element requires.

The Create Snapshot? custom decision element determines whether to take snapshots of virtual machines, depending on the disk modes of the virtual machines. The following table shows the bindings that the Create Snapshot? custom decision element requires.

The Create Snapshot? custom decision element custom decision element performs the following scripted function.

//A snapshot cannot be taken if one of its disks is in independent mode 
// (independent-persistent or independent-nonpersistent)
var containsIndependentDisks = false;
if (vmDisksModes!=null && vmDisksModes.length>0) {
	for (i in vmDisksModes) {
		if (vmDisksModes[i].charAt(0)=="i") {
			containsIndependentDisks = true;
		}
	}
} else {
	//if no disk found no need to try to snapshot the VM
	System.warn("Won't snapshot '"+vm.name+"', no disks found");
	return false;
}
if (containsIndependentDisks) {
	System.warn("Won't snapshot '"+vm.name+"', independent disk(s) found");
	return false;
} else {
	System.log("Snapshoting '"+vm.name+"'");
	return true;
}

The Create a snapshot workflow element takes snapshots of virtual machines. The following table shows the bindings that the Create a snapshot workflow element requires.

The VM Snapshots scriptable task element adds the snapshots to an array. The following table shows the bindings that the VM Snapshots scriptable task element requires.

The VM Snapshots scriptable task element performs the following scripted function.

//Writes the following event in the vCO database 
Server.log("Successfully took snapshot of the VM '"+vm.name);
//Inserts the VM snapshot in an array
snapshotVmArray.push(vm);

The Increment scriptable task element increments the counter that counts the number of virtual machines in the array. The following table shows the bindings that the Increment scriptable task element requires.

The Increment scriptable task element performs the following scripted function.

//Increases the array VM counter
vmCounter++;
//Sets the next VM to be snapshot in the attribute vm
vm = allVMs[vmCounter];

The Log Exception scriptable task element handles exceptions from the workflow and action elements. The following table shows the bindings that the Log Exception scriptable task element requires.

The Log Exception scriptable task element performs the following scripted function.

//Writes  the following event in the vCO database
Server.error("Coudln't snapshot the VM '"+vm.name+"', exception: "+errorCode);

The Set Output scriptable generates the workflow's output parameter, that contains the array of virtual machines of which snapshots have been taken. The following table shows the bindings that the Set Output scriptable task element requires.

The Set Output scriptable task element performs the following scripted function.

//Passes the value of the internal attribute to a workflow output parameter
snapshotVmArrayOut = snapshotVmArray;