Administration

The system health dashboard in the top left of the Horizon Administrator display provides a
number of links that you can use to view reports about the operation of Horizon 7:
Sessions
Provides a link to the Sessions screen, which displays information about the status of remote
desktop and application sessions.
Problem vCenter VMs
Provides a link to the Machines screen, which displays information about vCenter virtual
machines, RDS hosts, other machines that Horizon 7 has flagged as having problems.
Problem RDS Hosts
Provides a link to the RDS Hosts tab on the Machines screen, which displays information about
RDS hosts that Horizon 7 has flagged as having problems.
Events
Provides links to the Events screen filtered for error events and for warning events.
System Health
Provides links to the Dashboard screen, which displays summaries of the status of Horizon
7 components, registered Unified Access Gateway details for version 3.4 or later, vSphere
components, domains, desktops, and datastore usage.
The system health dashboard displays a numbered link against each item. This value indicates the
number of items that the linked report provides details about.
Configuring Load Balancers for Horizon Connection Server
Health Monitoring
To monitor load balancing health on Horizon Connection Server, follow these best practices.
To avoid flooding Connection Server with a large number of health check requests, set the polling
interval to 30 seconds, with a timeout of two or three times that period. Try to have no more than
two load balancers sending probes to one Connection Server instance.
The only supported health check is a fetch of favicon.ico. To minimize the cost of the probe,
use the HEAD method where possible. Whether or not the check is successful, you must drop the
connection after the fetch by either adding a Connection: close header to the request or else using
an HTTP/1.0 request. An example of using the HEAD method in the send string of the load balancer:
HEAD /favicon.ico HTTP/1.1\r\nHost: \r\nConnection: Close\r\n
The HTTP status is usually 200. If the Connection Server has been administratively disabled (see
Disable or Enable Horizon Connection Server), the status will be 503.
For timeout settings and load balancer persistence values, see the KB article on Timeout Settings
and Load Balancer Persistence.
Horizon 7 Administration
VMware, Inc. 243