6.7

Table Of Contents
When a Platform Services Controller instance stops responding, you must manually fail over the
vCenter Server instances that are registered to it. You fail over the instances by repointing them to other
functional Platform Services Controller instances within the same site. For information about how to
repoint vCenter Server instances to another external Platform Services Controller, see vCenter Server
Installation and Setup.
Note If your vCenter Single Sign-On domain includes three or more Platform Services Controller
instances, you can manually create a ring topology. A ring topology ensures Platform Services Controller
reliability when one of the instances fails. To create a ring topology, run the /usr/lib/vmware-
vmdir/bin/vdcrepadmin -f createagreement command against the first and last
Platform Services Controller instance that you have deployed.
Platform Services Controller with No Load Balancer Across
vCenter Single Sign-On Sites
Figure 18. Example of Two Joined Pairs of Platform Services Controller Instances Across
Two Sites with No Load Balancer
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
vCenter Server
Platform Services
Controller
Virtual Machine or
Physical Server
Virtual Machine or
Physical Server
Site 1 Site 2
Your vCenter Single Sign-On domain might span multiple sites. When no load balancer is available, you
can manually repoint vCenter Server from a failed to a functional Platform Services Controller within the
same site. For information about how to repoint vCenter Server instances to another external
Platform Services Controller, see vCenter Server Installation and Setup.
Understanding vSphere Domains, Domain Names, and
Sites
Each Platform Services Controller is associated with a vCenter Single Sign-On domain. The domain
name defaults to vsphere.local, but you can change it during installation of the first
Platform Services Controller. The domain determines the local authentication space. You can split a
domain into multiple sites, and assign each Platform Services Controller and vCenter Server instance to a
site. Sites are logical constructs, but usually correspond to geographic location.
Platform Services Controller Administration
VMware, Inc. 13