KEMP vCloud Air - Manual (Page 15)

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VLM for VMware vCloud Air
Installation Guide
2. For each hostname that needs to be delegated to the VLM, create an NS record and set
the value to the A record created for the VLM in the previous step, for example
www.web.example.com to vlm1.example.com which will be a public IP address on the
vCloud Air infrastructure.
3. For a HA configuration, repeat step 1 for the second VLM using a unique hostname, for
example lm2.example.com. Repeat step 2 using the second LoadMaster. This results in 2
NS records for www.example.com; one pointing to lm1.example.com and one to
lm2.example.com.
DNS Responder System Configuration
Configuration of global parameters controls the behaviour of the entire LoadMaster. The Source
of Authority information is not required for basic functionality; however, it is recommended to
populate this metadata to accurately represent the LoadMaster DNS server.
Resource Check Parameters define the global health checking that occurs from the LoadMaster
to the Clusters and Real Servers. Stickiness defines how long persistence will exist and the
Location Data Patch defines the version of the GEO data files being used by the LoadMaster and
allows updates to be installed.
The options can be found by selecting the Global Balancing > Miscellaneous Params option in
the main menu of the Web User Interface (WUI). For more information on what each of the
fields in this menu option mean, refer to the Web User Interface (WUI), Configuration Guide.
4.3.1 Stickiness
Figure 5-2: Stickiness
Global Server Load Balancing (GSLB) Persistence, also known as ‘Stickiness’, is the property that
enables all name resolution requests from an individual client to be sent to the same set of
resources until a specified period of time has elapsed. This ensures that users are able to
retrieve and interact with session-specific data.
For further information, refer to the GEO Sticky DNS, Feature Description.
Fully Qualified Domain Name (FQDN)
A Fully Qualified Domain Name (FQDN) is the hostname in which you need to perform load
balancing. The FQDN can be any hostname in the top-level domain or a hostname that is nested
as a sub-domain. Each FQDN is considered an A record. Each distinct hostname must be
configured in the LoadMaster individually. FQDNs can be created for www.example.com and
also www.kemptechnologies.com.