Managed Object - HostSystem

Property of: AnswerFileStatusResult, CheckResult, ClusterDasAamNodeState, ClusterDasFailoverLevelAdvancedRuntimeInfoHostSlots, ClusterDasFdmHostState, ClusterDasHostRecommendation, ClusterDpmHostConfigInfo, ClusterDrsMigration, ClusterFailoverHostAdmissionControlInfoHostStatus, ClusterFailoverHostAdmissionControlPolicy, ClusterHostGroup, ClusterHostRecommendation, ClusterInitialPlacementAction, ComputeResource, ComputeResourceHostSPBMLicenseInfo, CpuIncompatible, DasHeartbeatDatastoreInfo, DatastoreHostMount, DatastoreNotWritableOnHost, DiagnosticManagerBundleInfo, DisallowedOperationOnFailoverHost, DistributedVirtualPort, DistributedVirtualSwitchHostMemberConfigInfo, DistributedVirtualSwitchHostMemberConfigSpec, DistributedVirtualSwitchManagerCompatibilityResult, DistributedVirtualSwitchManagerHostArrayFilter, DrsVmotionIncompatibleFault, DvsOperationBulkFaultFaultOnHost, DVSSummary, FaultToleranceAntiAffinityViolated, FtIssuesOnHost, HostConfigInfo, HostEventArgument, HostListSummary, HostProfile, HostProfileCompleteConfigSpec, HostProfileHostBasedConfigSpec, HostProfileSerializedHostProfileSpec, HostVmfsRescanResult, HostVMotionCompatibility, IncompatibleHostForFtSecondary, InsufficientHostCapacityFault, InvalidHostState, InvalidProfileReferenceHost, IORMNotSupportedHostOnDatastore, MigrationFeatureNotSupported, Network, NoCompatibleHost, NotEnoughLogicalCpus, NotSupportedDeviceForFT, OvfCreateImportSpecParams, ProfileReferenceHostChangedEvent, QuiesceDatastoreIOForHAFailed, RuleViolation, StoragePlacementSpec, ThirdPartyLicenseAssignmentFailed, VAppCloneSpec, VirtualHardwareVersionNotSupported, VirtualMachineConfigOptionDescriptor, VirtualMachineRelocateSpec, VirtualMachineRuntimeInfo, VmAlreadyExistsInDatacenter, VMotionInterfaceIssue, VmWwnConflict
Parameter to: ApplyHostConfig_Task, BrowseDiagnosticLog, CheckAnswerFileStatus_Task, CheckCompatibility_Task, CheckLicenseFeature, CheckMigrate_Task, ClusterEnterMaintenanceMode, ConfigureLicenseSource, CreateChildVM_Task, CreateSecondaryVM_Task, CreateVM_Task, DisableFeature, EnableFeature, EnableSecondaryVM_Task, ExecuteHostProfile, ExportAnswerFile_Task, GenerateConfigTaskList, GenerateLogBundles_Task, ImportVApp, MarkAsVirtualMachine, MigrateVM_Task, MoveHostInto_Task, MoveInto_Task, PowerOnVM_Task, QueryAnswerFileStatus, QueryConfigOption, QueryConfigTarget, QueryDescriptions, QueryDvsConfigTarget, QueryIORMConfigOption, QueryLicenseSourceAvailability, QueryLicenseUsage, QuerySupportedFeatures, QueryTargetCapabilities, QueryVMotionCompatibility, QueryVMotionCompatibilityEx_Task, RectifyDvsHost_Task, RectifyDvsOnHost_Task, RegisterChildVM_Task, RegisterVM_Task, RetrieveAnswerFile, RevertToCurrentSnapshot_Task, RevertToSnapshot_Task, SetLicenseEdition, UpdateAnswerFile_Task, UpdateReferenceHost, ValidateHost, ValidateMigration
Returned by: AddHost_Task, QueryCompatibleHostForExistingDvs, QueryCompatibleHostForNewDvs
Extends: ManagedEntity
See also: Datastore, HostCapability, HostConfigInfo, HostConfigManager, HostConnectInfo, HostConnectSpec, HostDatastoreBrowser, HostFlagInfo, HostHardwareInfo, HostIpmiInfo, HostLicensableResourceInfo, HostListSummary, HostRuntimeInfo, HostServiceTicket, HostSystemReconnectSpec, HostSystemResourceInfo, Network, VirtualMachine, VirtualMachineConfigInfo

Managed Object Description

The HostSystem managed object type provides access to a virtualization host platform.

Invoking destroy on a HostSystem of standalone type throws a NotSupported fault. A standalone HostSystem can be destroyed only by invoking destroy on its parent ComputeResource. Invoking destroy on a failover host throws a DisallowedOperationOnFailoverHost fault. See ClusterFailoverHostAdmissionControlPolicy.

Properties

Name	Type	Description
capability*	HostCapability	Host capabilities. This might not be available for a disconnected host.
config*	HostConfigInfo	Host configuration information. This might not be available for a disconnected host.
configManager	HostConfigManager	Host configuration systems.
datastore* P	ManagedObjectReference[] to a Datastore[]	A collection of references to the subset of datastore objects in the datacenter that are available in this HostSystem.
datastoreBrowser P	ManagedObjectReference to a HostDatastoreBrowser	DatastoreBrowser to browse datastores for this host.
hardware*	HostHardwareInfo	Hardware configuration of the host. This might not be available for a disconnected host.
licensableResource	HostLicensableResourceInfo	Information about all licensable resources, currently present on this host. This information is used mostly by the modules, manipulating information in the LicenseManager. Developers of such modules should use this property instead of hardware. NOTE: The values in this property may not be accurate for pre-5.0 hosts when returned by vCenter 5.0 *Since* vSphere API 5.0
network* P	ManagedObjectReference[] to a Network[]	A collection of references to the subset of network objects in the datacenter that are available in this HostSystem.
runtime	HostRuntimeInfo	Runtime state information about the host such as connection state.
summary	HostListSummary	Basic information about the host, including connection state.
systemResources*	HostSystemResourceInfo	Reference for the system resource hierarchy, used for configuring the set of resources reserved to the system and unavailable to virtual machines.
vm*	ManagedObjectReference[] to a VirtualMachine[]	List of virtual machines associated with this host.
Properties inherited from ManagedEntity
alarmActionsEnabled, configIssue, configStatus, customValue, declaredAlarmState, disabledMethod, effectiveRole, name, overallStatus, parent, permission, recentTask, tag, triggeredAlarmState
Properties inherited from ExtensibleManagedObject
availableField, value

*May not be presentP Required privilege: System.View

Methods

Methods defined in this Managed Object
AcquireCimServicesTicket, DisconnectHost_Task, EnterLockdownMode, EnterMaintenanceMode_Task, ExitLockdownMode, ExitMaintenanceMode_Task, PowerDownHostToStandBy_Task, PowerUpHostFromStandBy_Task, QueryHostConnectionInfo, QueryMemoryOverhead, QueryMemoryOverheadEx, RebootHost_Task, ReconfigureHostForDAS_Task, ReconnectHost_Task, RetrieveHardwareUptime, ShutdownHost_Task, UpdateFlags, UpdateIpmi, UpdateSystemResources
Methods inherited from ManagedEntity
Destroy_Task, Reload, Rename_Task
Methods inherited from ExtensibleManagedObject
setCustomValue

AcquireCimServicesTicket

Creates and returns a one-time credential used to establish a remote connection to a CIM interface. The port to connect to is the standard well known port for the service.

Required Privileges: Host.Cim.CimInteraction
Since: VI API 2.5

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
HostServiceTicket

Faults

Type	Description
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="AcquireCimServicesTicket" type="vim25:AcquireCimServicesTicketRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="AcquireCimServicesTicketResponse">
            <complexType>
               <sequence>
                  <element name="returnval" type="vim25:HostServiceTicket"/>
               </sequence>
            </complexType>
         </element>

DisconnectHost_Task

Disconnects from a host and instructs the server to stop sending heartbeats.

Required Privileges: Host.Config.Connection

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
NotSupported	Thrown if run directly on an ESX Server host.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

EnterLockdownMode

Modifies the permissions on the host, so that it will only be accessible through local console or an authorized centralized management application. Any user defined permissions found on the host are lost.

Access via a VI client connected to the host is blocked. Access though other services running on the host is also blocked.

If the operation is successful, adminDisabled will be set to true. This API is not supported on the host, If invoked directly on a host, a NotSupported fault will be thrown.
See AuthorizationManager

Required Privileges: Host.Config.Settings
Since: vSphere API 4.1

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
None

Faults

Type	Description
AdminDisabled	Thrown if the host's Administrator permission has been disabled. See AuthorizationManager
DisableAdminNotSupported	Thrown if invoked directly on the host or the host doesn't support this operation. See AuthorizationManager
HostConfigFault	See AuthorizationManager
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="EnterLockdownMode" type="vim25:EnterLockdownModeRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="EnterLockdownModeResponse">
            <complexType/>
         </element>

EnterMaintenanceMode_Task

Puts the host in maintenance mode. While this task is running and when the host is in maintenance mode, no virtual machines can be powered on and no provisioning operations can be performed on the host. Once the call completes, it is safe to turn off a host without disrupting any virtual machines.

The task completes once there are no powered-on virtual machines on the host and no provisioning operations in progress on the host. The operation does not directly initiate any operations to evacuate or power-down powered-on virtual machines. However, if the host is part of a cluster with VMware DRS enabled, DRS provides migration recommendations to evacuate the powered-on virtual machines. If DRS is in fully-automatic mode, these are automatically scheduled.

If the host is part of a cluster and the task is issued through VirtualCenter with evacuatePoweredOffVms set to true, the task will not succeed unless all the powered-off virtual machines are reregistered to other hosts. If VMware DRS is enabled, vCenter Server will automatically evacuate powered-off virtual machines. The task is cancellable.

Required Privileges: Host.Config.Maintenance

Parameters

Name

Type

Description

_this

ManagedObjectReference

A reference to the HostSystem used to make the method call.

timeout

xsd:int

The task completes when the host successfully enters maintenance mode or the timeout expires, and in the latter case the task contains a Timeout fault. If the timeout is less than or equal to zero, there is no timeout. The timeout is specified in seconds.

evacuatePoweredOffVms*

xsd:boolean

This is a parameter only supported by VirtualCenter. If set to true, for a DRS disabled cluster, the task will not succeed unless all powered-off virtual machines have been manually reregistered; for a DRS enabled cluster, VirtualCenter will automatically reregister powered-off virtual machines and a powered-off virtual machine may remain at the host only for two reasons: (a) no compatible host found for reregistration, (b) DRS is disabled for the virtual machine. If set to false, powered-off virtual machines do not need to be moved.

Since VI API 2.5

*Need not be set

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
InvalidState	Thrown if the host is already in maintenance mode.
RequestCanceled	Thrown if the operation is canceled.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.
Timedout	Thrown if the operation timed out.

ExitLockdownMode

Restores Administrator permission for the local administrative account for the host that was removed by prior call to EnterLockdownMode. If the operation is successful, adminDisabled will be set to false. This API is not supported on the host. If invoked directly on a host, a NotSupported fault will be thrown.
See AuthorizationManager

Required Privileges: Host.Config.Settings
Since: vSphere API 4.1

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
None

Faults

Type	Description
AdminNotDisabled	Thrown if the host's Administrator permission is not disabled. See AuthorizationManager
DisableAdminNotSupported	Thrown if invoked directly on the host or the host doesn't support this operation. See AuthorizationManager
HostConfigFault	See AuthorizationManager
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="ExitLockdownMode" type="vim25:ExitLockdownModeRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="ExitLockdownModeResponse">
            <complexType/>
         </element>

ExitMaintenanceMode_Task

Takes the host out of maintenance mode. This blocks if any concurrent running maintenance-only host configurations operations are being performed. For example, if VMFS volumes are being upgraded.

The task is cancellable.

Required Privileges: Host.Config.Maintenance

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
timeout	xsd:int	Number of seconds to wait for the exit maintenance mode to succeed. If the timeout is less than or equal to zero, there is no timeout.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
InvalidState	Thrown if the host is not in maintenance mode.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.
Timedout

PowerDownHostToStandBy_Task

Puts the host in standby mode, a mode in which the host is in a standby state from which it can be powered up remotely. While this task is running, no virtual machines can be powered on and no provisioning operations can be performed on the host.

The task completes only if there are no powered-on virtual machines on the host, no provisioning operations in progress on the host, and the host stopped responding. The operation does not directly initiate any operations to evacuate or power-down powered-on virtual machines. However, if a dynamic recommendation generation module is running, if possible, it will provide, and depending on the automation level, it will execute migrations of powered-on virtual machine. Furthermore, VMware power management module may evacute and put a host in standby mode to save power. If the host is part of a cluster and the task is issued through VirtualCenter with evacuatePoweredOffVms set to true, the task will not succeed unless all the powered-off virtual machines are reregistered to other hosts. If VMware DRS is enabled, vCenter Server will automatically evacuate powered-off virtual machines.

The task is cancellable.

This command is not supported on all hosts. Check the host capability standbySupported.

Required Privileges: Host.Config.Maintenance
Since: VI API 2.5

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
timeoutSec	xsd:int	The task completes when the host successfully enters standby mode and stops sending heartbeat signals. If heartbeats are still coming after timeoutSecs seconds, the host is declared timedout, and the task is assumed failed.
evacuatePoweredOffVms*	xsd:boolean	This is a parameter used only by VirtualCenter. If set to true, for a DRS disabled cluster, the task will not succeed unless all powered-off virtual machines have been manually reregistered; for a DRS enabled cluster, VirtualCenter will automatically reregister powered-off virtual machines and a powered-off virtual machine may remain at the host only for two reasons: (a) no compatible host found for reregistration, (b) DRS is disabled for the virtual machine.

*Need not be set

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
HostPowerOpFailed	Thrown if the standby operation fails.
InvalidState	Thrown if the host is already in standby mode, or disconnected.
NotSupported	Thrown if the host does not support standby mode.
RequestCanceled	Thrown if the operation is canceled.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.
Timedout

PowerUpHostFromStandBy_Task

Takes the host out of standby mode. If the command is successful, the host wakes up and starts sending heartbeats. This method may be called automatically by a dynamic recommendation generation module to add capacity to a cluster, if the host is not in maintenance mode.

Note that, depending on the implementation of the wakeup method, the client may never receive an indicator of success in the returned task. In some cases, it is not even possible to ensure that the wakeup request has made it to the host.

The task is cancellable.

Required Privileges: Host.Config.Maintenance
Since: VI API 2.5

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
timeoutSec	xsd:int	The task completes when the host successfully exits standby state and sends a heartbeat signal. If nothing is received from the host for timeoutSec seconds, the host is declared timedout, and the task is assumed failed.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
HostPowerOpFailed	Thrown if the standby operation fails.
InvalidState	Thrown if the host is in a state from which it cannot be woken up (e.g., disconnected, poweredOff)
NotSupported	Thrown if the host does not support standby mode.
RequestCanceled	Thrown if the operation is canceled.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.
Timedout

QueryHostConnectionInfo

Connection-oriented information about a host.

Required Privileges: System.Read

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
HostConnectInfo

Faults

Type	Description
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryHostConnectionInfo" type="vim25:QueryHostConnectionInfoRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryHostConnectionInfoResponse">
            <complexType>
               <sequence>
                  <element name="returnval" type="vim25:HostConnectInfo"/>
               </sequence>
            </complexType>
         </element>

QueryMemoryOverhead

Deprecated. As of VI API 2.5, use QueryMemoryOverheadEx.

Determines the amount of memory overhead necessary to power on a virtual machine with the specified characteristics.

Required Privileges: System.Read

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
memorySize	xsd:long	The amount of virtual system RAM, in bytes. For an existing virtual machine, this value can be found (in megabytes) as the memoryMB property of the VirtualHardware.
videoRamSize*	xsd:int	The amount of virtual video RAM, in bytes. For an existing virtual machine on a host that supports advertising this property, this value can be found (in kilobytes) as the videoRamSizeInKB property of the VirtualMachineVideoCard. If this parameter is left unset, the default video RAM size for virtual machines on this host is assumed.
numVcpus	xsd:int	The number of virtual CPUs. For an existing virtual machine, this value can be found as the numCPU property of the VirtualHardware.

*Need not be set

Return Value

Type	Description
xsd:long	The amount of overhead memory required to power on such a virtual machine, in bytes.

Faults

Type	Description
NotSupported	Thrown if the host does not have memory resource allocation features.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryMemoryOverhead" type="vim25:QueryMemoryOverheadRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryMemoryOverheadResponse">
            <complexType>
               <sequence>
                  <element name="returnval" type="xsd:long"/>
               </sequence>
            </complexType>
         </element>

QueryMemoryOverheadEx

Determines the amount of memory overhead necessary to power on a virtual machine with the specified characteristics.

Required Privileges: System.Read
Since: VI API 2.5

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
vmConfigInfo	VirtualMachineConfigInfo	The configuration of the virtual machine.

Return Value

Type	Description
xsd:long	The amount of overhead memory required to power on such a virtual machine, in bytes.

Faults

Type	Description
NotSupported	Thrown if the host does not have memory resource allocation features.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryMemoryOverheadEx" type="vim25:QueryMemoryOverheadExRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="QueryMemoryOverheadExResponse">
            <complexType>
               <sequence>
                  <element name="returnval" type="xsd:long"/>
               </sequence>
            </complexType>
         </element>

RebootHost_Task

Reboots a host. If the command is successful, then the host has been rebooted. If connected directly to the host, the client never receives an indicator of success in the returned task but simply loses connection to the host, upon success.

This command is not supported on all hosts. Check the host capability vim.host.Capability.rebootSupported.

Required Privileges: Host.Config.Maintenance

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
force	xsd:boolean	Flag to specify whether or not the host should be rebooted regardless of whether it is in maintenance mode. If true, the host is rebooted, even if there are virtual machines running or other operations in progress.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
InvalidState	Thrown if "force" is false and the host is not in maintenance mode.
NotSupported	Thrown if the host does not support the reboot operation.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

ReconfigureHostForDAS_Task

Reconfigures the host for vSphere HA.

If the host is part of a HA cluster, this operation reconfigures the host for HA. For example, this operation may be used if a host is added to a HA enabled cluster and the automatic HA configuration system task fails. Automatic HA configuration may fail for a variety of reasons. For example, the host is configured incorrectly.

Required Privileges: Host.Config.Connection

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
DasConfigFault	Thrown if there is a problem reconfiguring the host for HA.
NotSupported	Thrown if run directly on an ESX Server host.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

ReconnectHost_Task

Reconnects to a host. This process reinstalls agents and reconfigures the host, if it has gotten out of date with VirtualCenter. The reconnection process goes through many of the same steps as addHost: ensuring the correct set of licenses for the number of CPUs on the host, ensuring the correct set of agents is installed, and ensuring that networks and datastores are discovered and registered with VirtualCenter.

The client can change the IP address and port of the host when doing a reconnect operation. This can be useful if the client wants to preserve existing metadata, even though the host is changing its IP address. For example, clients could preserve existing statistics, alarms, and privileges.

This method can also be used to change the SSL thumbprint of a connected host without disconnecting it.

Any changes made to the resource hierarchy on the host when the host was disconnected are overriden by VirtualCenter settings on reconnect.

This method is only supported through VirtualCenter.

Required Privileges: Host.Config.Connection

Parameters

Name

Type

Description

_this

ManagedObjectReference

A reference to the HostSystem used to make the method call.

cnxSpec*

HostConnectSpec

Includes the parameters to use, including user name and password, when reconnecting to the host. If this parameter is not specified, the default connection parameters is used.

reconnectSpec*

HostSystemReconnectSpec

Includes connection parameters specific to reconnect. This will mainly be used to indicate how to handle divergence between the host settings and vCenter Server settings when the host was disconnected.

Since vSphere API 5.0

*Need not be set

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
AlreadyBeingManaged	Thrown if host is already being managed by another VirtualCenter server
HostConnectFault	Thrown if an error occurred when attempting to reconnect to a host. Typically, a more specific subclass, such as AlreadyBeingManaged, is thrown.
InvalidLogin	Thrown if the method fails to authenticate with the host.
InvalidName	Thrown if the host name is invalid.
InvalidState	Thrown if the host is not disconnected.
NoHost	Thrown if the method is unable to contact the server.
NotEnoughLicenses	Thrown if there are not enough licenses to add this host.
NotSupported	Thrown if no host can be added to this group. This is the case if the ComputeResource is a standalone type.
NotSupportedHost	Thrown if the host is running a software version that is not supported.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.
SSLVerifyFault	Thrown if the host certificate could not be authenticated.

RetrieveHardwareUptime

Return the hardware uptime of the host in seconds. The harware uptime of a host is not affected by NTP and changes to its wall clock time and can be used by clients to provide a common time reference for all hosts.

Required Privileges: System.Read
Since: vSphere API 4.1

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.

Return Value

Type	Description
xsd:long

Faults

Type	Description
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="RetrieveHardwareUptime" type="vim25:RetrieveHardwareUptimeRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="RetrieveHardwareUptimeResponse">
            <complexType>
               <sequence>
                  <element name="returnval" type="xsd:long"/>
               </sequence>
            </complexType>
         </element>

ShutdownHost_Task

Shuts down a host. If the command is successful, then the host has been shut down. Thus, the client never receives an indicator of success in the returned task if connected directly to the host.

This command is not supported on all hosts. Check the host capability shutdownSupported.

Required Privileges: Host.Config.Maintenance

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
force	xsd:boolean	Flag to specify whether or not the host should be shut down regardless of whether it is in maintenance mode. If true, the host is shut down, even if there are virtual machines running or other operations in progress.

Return Value

Type	Description
ManagedObjectReference to a Task	This method returns a Task object with which to monitor the operation.

Faults

Type	Description
InvalidState	Thrown if "force" is false and the host is not in maintenance mode.
NotSupported	Thrown if the host does not support shutdown.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

UpdateFlags

Update flags that are part of the HostFlagInfo object.

Required Privileges: Host.Config.Settings
Since: VI API 2.5

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
flagInfo	HostFlagInfo

Return Value

Type	Description
None

Faults

Type	Description
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateFlags" type="vim25:UpdateFlagsRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateFlagsResponse">
            <complexType/>
         </element>

UpdateIpmi

Update fields that are part of the HostIpmiInfo object.

Required Privileges: Host.Config.Settings
Since: vSphere API 4.0

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
ipmiInfo	HostIpmiInfo

Return Value

Type	Description
None

Faults

Type	Description
InvalidIpmiLoginInfo	Thrown if the supplied user ID and/or password is invalid.
InvalidIpmiMacAddress	Thrown if the supplied MAC address is invalid.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateIpmi" type="vim25:UpdateIpmiRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateIpmiResponse">
            <complexType/>
         </element>

UpdateSystemResources

Update the configuration of the system resource hierarchy.

Required Privileges: Host.Config.Resources

Parameters

Name	Type	Description
_this	ManagedObjectReference	A reference to the HostSystem used to make the method call.
resourceInfo	HostSystemResourceInfo

Return Value

Type	Description
None

Faults

Type	Description
InvalidArgument	Thrown if the resource specification is invalid.
RuntimeFault	Thrown if any type of runtime fault is thrown that is not covered by the other faults; for example, a communication error.

Show WSDL type definition

         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateSystemResources" type="vim25:UpdateSystemResourcesRequestType"/>
         <element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:vim25="urn:vim25" name="UpdateSystemResourcesResponse">
            <complexType/>
         </element>