Scripting Object - VcOvfManager

Attribute of
VcSdkConnection, VcServiceContent

Scripting Object Description

Service interface to parse and generate OVF descriptors.

The purpose of this interface is to make it easier for callers to import VMs and vApps from OVF packages and to export VI packages to OVF. In the following description, the term "client" is used to mean any caller of the interface.

This interface only converts between OVF and VI types. To actually import and export entities, use VcResourcePool, VcVirtualMachine and VcVirtualApp.


For the import scenario, the typical sequence of events is as follows:

The client calls parseDescriptor to obtain information about the OVF descriptor. This typically includes information (such as a list of networks) that must be mapped to VI infrastructure entities.

The OVF descriptor is validated against the OVF Specification, and any errors or warnings are returned as part of the ParseResult. For example, the parser might encounter a section marked required that it does not understand, or the XML descriptor might be malformed.

The client decides on network mappings, datastore, properties etc. It then calls createImportSpec to obtain the parameters needed to call VcResourcePool.

If any warnings are present, the client will review these and decide whether to proceed or not. If errors are present, the ImportSpec will be missing, so the client is forced to give up or fix the problems and then try again.

The client now calls VcResourcePool, passing the ImportSpec as a parameter. This will create the virtual machines and VcVirtualApp objects in VI and return locations to which the files of the entity can be uploaded. It also returns a lease that controls the duration of the lock taken on the newly created inventory objects. When all files have been uploaded, the client must release this lease.


Creating the OVF descriptor is the last part of exporting an entity to OVF. At this point, the client has already downloaded all files for the entity, optionally compressing and/or chunking them (however, the client may do a "dry run" of creating the descriptor before downloading the files. See VcOvfManager).

In addition to the entity reference itself, information about the choices made on these files is passed to createDescriptor as a list of OvfFile instances.

The client must inspect and act upon warnings and errors as previously described.

No matter if the export succeeds or fails, the client is responsible for releasing the shared state lock taken on the entity (by VcVirtualMachine or VcVirtualApp) during the export.

Error handling

All result types contain warning and error lists. Warnings do not cause processing to fail, but the caller (typically, the user of a GUI client) may choose to reject the result based on the warnings issued.

Errors cause processing to abort by definition.


Name Type Description

returns the id of this ManagedObject

returns the ManagedObjectReference of this ManagedObject

returns the parent SdkConnection

returns the parent SdkConnection (deprecated)

returns the type of this ManagedObject


Methods defined in this Scripting Object
createDescriptor, createImportSpec, createTrigger, parseDescriptor, validateHost


Validate that the given OVF can be imported on the host.

More specifically, this means whether or not the host supports the virtual hardware required by the OVF descriptor.



The OVF descriptor to examine.

The host to validate against.

Additional parameters for validateHost, wrapped in a ValidateHostParams instance.

Return Value

Type Description


Parse the OVF descriptor and return as much information about it as possible without knowing the host on which it will be imported.

Typically, this method is called once without a deploymentOption parameter to obtain the values for the default deployment option. Part of the result is the list of possible deployment options. To obtain the values for a particular deployment option, call this method again, specifying that option.



The OVF descriptor to examine.

Additional parameters for parseDescriptor, wrapped in an instance of ParseDescriptorParams.

Return Value

Type Description


Validate the OVF descriptor against the hardware supported by the host system. If the validation succeeds, return a result containing:



The OVF descriptor of the entity.

The resource pool to import the entity to. May be a vApp.

The datastore on which to create the inventory objects of the entity, for example "storage1". The privilege Datastore.AllocateSpace is required on the datastore.

Additional parameters to the method, bundled in an instance of CreateImportSpecParams.

Return Value

Type Description


Create an OVF descriptor for the specified ManagedEntity, which may be a VcVirtualMachine or a VcVirtualApp.

To create the complete OVF descriptor, the client must already have downloaded the files that are part of the entity, because information about these files (compression, chunking, filename etc.) is part of the descriptor.

However, these downloads can be quite time-consuming, so if the descriptor for some reason cannot be generated, the client will want to know this before downloading the files.

For this reason, the client may do an initial "dry run" with the ovfFiles parameter unset. Default filenames will then be used in the descriptor, and the client can examine any warnings and/or errors before downloading the files.

After the final call to this method, client must release the lock on the entity given to it by VcVirtualMachine or VcVirtualApp.



The entity to export. Supported types are VcVirtualMachine and VcVirtualApp.

Parameters to the method, bundled in an instance of CreateDescriptorParams.

Return Value

Type Description


Create a trigger from this ManagedObject



Waiting timout in seconds

The monitored vCenter API filter

The condition in OGNL language

The vCenter API filter used to synchronize the content of the session
*Need not be set

Return Value

Type Description