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Sep 03, 2017

Monitoring overview

Monitoring License Server components

The following table lists the object types that Citrix SCOM Management Pack for License Server discovers in the monitored environment.

Object type Description
Citrix vendor daemon A process that is responsible for core operations of Citrix License Server.
License A Citrix license file, which can be of one of the following types: User/Device, Concurrent user, Concurrent system, Named user license.
License Server A system that allows licenses to be shared across the network. It stores and manages Citrix license files.
License server TCP Probe TCP ports on the license server host: vendor daemon port, license server manager port, and console web server port.
Product A group of license files for a Citrix product, such as XenDesktop or XenApp.
Service A Windows service that is part of Citrix License Server.
License Server Computer A computer hosting the License Server. There are no monitors associated with this object. The State "Not Monitored" is expected.

Key monitoring scenarios

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Citrix SCOM Management Pack for License Server Reference Guide

A complete list of monitors and rules available in Citrix SCOM Management Pack for License Server.

Product license usage

After a user connects to a computer running a Citrix product, the product requests a license from the license server and license gets checked out. License can be checked out to a user, device, session, server, or appliance, depending on the licensing model for a particular product.

Users can eventually run out of available licenses. Citrix SCOM Management Pack for License Server handles this situation in various ways.

Monitors

  • Number of used licenses: This monitor checks if the number of used licenses has exceeded the threshold value. The Warning and Critical thresholds can be configured. 
  • Number of used licenses (Percentage): This monitor checks whether the percentage of used licenses has exceeded the threshold value. The Warning and Critical thresholds can be configured.
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Performance collection rules

Citrix SCOM Management Pack for License Server provides the following rules that collect metrics for a license:

  • Number of All Licenses Performance DB DW: This rule collects the number of all licenses for a Citrix product.
  • Number of Used Licenses Performance DB DW: This rule collects the number of used licenses for a Citrix product.
  • Number of Used Licenses (Percentage) Performance DB DW: This rule collects the percentage of used licenses
  • Number of Available Licenses Performance DB DW: This rule collects the number of available licenses.

Values are displayed in the License Performance view.

Reports

With the Citrix SCOM Management Pack for License Server reports, administrators have an overview of license usage on Citrix license servers. Reports show summarized data as well as details for the amount of licenses and the license usage for each Citrix product.

Citrix SCOM Management Pack for License Server provides the following reports:

  • Citrix License Summary: This report shows product license usage summary for the selected time range. The following values are displayed:
    • Percentage of used licenses (maximum value)
    • Number of used licenses (maximum value)
    • Number of all licenses

Figure: Citrix License Summary report

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  • Citrix License Usage: This report shows license usage for each installed Citrix product for the selected time range. The following values are displayed:
    • Percentage of used licenses (maximum value in aggregation period) with a trend line
    • Number of used licenses (maximum value in aggregation period)
    • Number of all licenses
Figure: Citrix License Usage report
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License and Citrix Subscription Advantage membership expiration

License expiration monitoring

Citrix licenses can have a limited lifetime. After a license expires, it can no longer be checked out and users are unable to use the product. Citrix SCOM Management Pack for License Server provides a monitor that alerts administrators if a license is about to expire soon or if it has already expired.

Citrix Subscription Advantage membership expiration monitoring

When purchasing a new Citrix product, your purchase includes a one-year membership in a Citrix Subscription Advantage. This membership entitles you to, among other benefits, any product updates, including major and minor releases, released during your membership period.

Citrix SCOM Management Pack for License Server provides a monitor that alerts administrators if Subscription Advantage Membership is about to expire soon or has already expired.

License Server infrastructure health

Citrix SCOM Management Pack for License Server allows you to monitor the crucial services and processes of a Citrix License Server instance and analyze the CPU performance and memory consumption on its host system.

Figure: License Server topology

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The following Windows services of License Server are monitored:

  • Citrix Licensing
  • Citrix Licensing Config Service (the service is present only in specific Citrix Licensing versions)
  • Citrix Licensing Support Service
  • Citrix Licensing WMI
  • Citrix Web Services for Licensing

Besides service monitoring, Citrix SCOM Management Pack for License Server checks the health of the Citrix vendor daemon process. Citrix vendor daemon is responsible for the core operations of License Server, such as tracking how many licenses are checked out and who uses them. The vendor daemon can manage all of your Citrix license files and is fully backward compatible with any license files you have.

License Server TCP port probing

The Citrix License Server installation configures communication channels through several ports:

  • Console Web server port: Web server uses the HTTP or HTTPS TCP/IP port for communication with clients connecting to the License Administration Console.
  • License server manager port: This port is used by the license server manager, which handles the initial communication between the products, starts the vendor daemon, and relays check out and check in requests to the vendor daemon. 
  • Vendor daemon port: This port is used by the Citrix vendor daemon, which is responsible for the core operations of the license server, including license allocation.

Citrix SCOM Management Pack for License Server executes TCP port probes on license server from SCOM server perspective for each configured TCP port. Monitors alert the following states:

  • Connection Refused
  • Connection Timeout
  • DNS Resolution Failure
  • Host Unreachable

Optional configuration

Some monitors and rules have default thresholds that might need additional tuning to suit your environment. You should evaluate monitors and rules to determine whether the default thresholds are appropriate for your environment. If a default threshold is not appropriate for your environment, you should baseline the relevant performance counters, and then adjust the threshold by overriding them.

For a complete list of monitors and rules, see the Citrix SCOM Management Pack for License Server Reference Guide, which you can find in the Key Monitoring Scenarios section.

Customizing sealed management packs

Tuning thresholds for performance monitors and rules

Similar to customizing the default SCOM management pack, you can customize the sealed management packs that Citrix SCOM Management Pack for License Server provides. For details, see the Microsoft TechNet website: