How you can discover hosts in CommandCentral
CommandCentral provides several ways to discover hosts and their associations to storage resources and network devices. To discover a host, you can use agentless capabilities or you can install an agent.
Out of the box, the Management Server can discover the storage resources in your storage area network. To get up and running, you can use agentless capabilities to discover hosts and their connections to storage resources. Agentless capabilities include the following:
Host discovery by remotely running agentless discovery scripts
CommandCentral can discover a remote host by running the scripts that collect data
from the host. You can run the scripts in the following ways:
You can let CommandCentral remotely access the host and run the scripts.
You can copy the scripts to the remote host, run the scripts, and then send the output file to the Management Server.
CommandCentral identifies this type of host as an agentless host.
Host discovery by associating HBAs to user-created hosts
If CommandCentral does not discover a host through an agent or through agentless discovery scripts, it cannot discover that host's associations to storage resources. However, if a host connects to a fabric that the Management Server discovers, the Management Server discovers the HBAs to which the host connects. CommandCentral identifies the HBAs as unidentified adapters.
You can use agentless capabilities to create a host object and associate the unidentified adapter to that host. After you create the host object, CommandCentral can associate objects such as zones and LUNs to the host.
To perform this process, you can match patterns in the name of the zone or zone alias to which the HBA is associated. You can also specify the mapping information between HBAs and hosts.
The host object is an object that exists in the CommandCentral database. CommandCentral does not communicate with the physical host. CommandCentral identifies this type of host as a user-created host.
See How CommandCentral performs agentless discovery by creating host objects.
An agent is a software package that runs on a host. It discovers information about a host and relays the information to the Management Server. You can install the following types of agents:
The Standard Agent discovers and monitors the storage resources that are associated with a host.
See About the Standard Agent.
The Unified Agent is a part of Veritas Storage Foundation. It consists of the VRTSsfmh package, which collects information about a host that includes a Storage Foundation product. Wherever Storage Foundation is installed, CommandCentral can use the agent to discover information about the host.
See About the Unified Agent.
CommandCentral also lets you discover a host through the Control Host, which is a special type of Standard Agent. The Control Host helps you manage discovery data from agentless hosts and can discover arrays, switches, and VMware ESX servers.
See About the Control Host.
See When you need to use a Control Host.
To decide which host discovery option you want to use, you can review information about the supported features for each option.
See Supported features for host discovery options.
Through each of these host discovery options, the Management Server is the central point to which all of the discovered data flows. The following figure depicts the flow of data with each of the host discovery options.
Figure: How CommandCentral components work together to discover hosts