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ONTAP Tools for VMware vSphere: A primer on how discovery works and can be adjusted

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Applies to

  • ONTAP Tools for VMware vSphere 9.x (OTV)
  • Virtual Storage Console (VSC)

Description

ONTAP Tools for VMware vSphere triggers a discovery in the following ways:

  • Immediately after services startup
  • Daily scheduled discovery (by default at 6 AM local time)
  • Automatic discovery whenever there is a datastore related event in the vSphere event logs

The following vCenter events will result in triggering a OTV / VSC discovery:

// Datastore events
vim.event.DatastoreCapacityIncreasedEvent 
vim.event.DatastoreDestroyedEvent 
vim.event.DatastoreDuplicatedEvent 
vim.event.DatastoreRenamedEvent 

// Host events
vim.event.DatastoreDiscoveredEvent
vim.event.DatastorePrincipalConfigured 
vim.event.DatastoreRemovedOnHostEvent 
vim.event.DatastoreRenamedOnHostEvent 
vim.event.LocalDatastoreCreatedEvent 
vim.event.NASDatastoreCreatedEvent 
vim.event.NoDatastoresConfiguredEvent 
vim.event.VMFSDatastoreCreatedEvent 
vim.event.VMFSDatastoreExpandedEvent 
vim.event.VMFSDatastoreExtendedEvent 

When OTV discovery occurs, ONTAP tools:

  • First performs a ESXi host discovery.  One of the objectives of the host discovery is to identify IP addresses associated with storage.  This could be:
    • NFS Mount Points
    • iSCSI Targets
  • OTV then performs a discovery against any storage systems present.  This can include:
    • Authenticated storage systems
    • Non-Authenticated storage systems
      •  These storage system addresses are pulled from the ESXi host discovery
      • If ESXi is unable to authenticate these storage addresses or associate them with a known Storage System, these storage addresses are marked as "Unknown"

 

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