6.3

Table Of Contents
Table 41. Cluster and Node Maintenance Procedures
Procedure Interface Description
Change Cluster Status Administration/Product You can change the status of a node to online or
oine.
In a high availability (HA) cluster, taking the
master or replica oine causes
vRealize Operations Manager to run from the
remaining node and for HA status to be degraded.
Any manual or system action that restarts the
cluster brings all vRealize Operations Manager
nodes online, including any nodes that you had
taken oine.
If you take a data node that is part of a multi-node
cluster oine and then bring it back online, the
Endpoint Operations Management adapter does
not automatically come back online. To bring the
Endpoint Operations Management adapter online,
select the Endpoint Operations Management
adapter in the Inventory Explorer and click the
Start Collector icon .
Enable or Disable High
Availability
Administration Enabling or disabling high availability requires the
cluster to have at least one Data node, with all
nodes online or all oine. You cannot us Remote
Collector nodes.
Disabling high availability removes the replica
node and restarts the
vRealize Operations Manager cluster.
After you disable high availability, the replica
node vRealize Operations Manager converts back
to a data node and restarts the cluster.
Generate Passphrase Administration You can generate a passphrase to use instead of
the administrator credentials to add a node to this
cluster.
The passphrase is only valid for a single use.
Remove a Node Administration When you remove a node, you lose data that the
node had collected unless you are running in high
availability (HA) mode. HA protects against the
removal or loss of one node.
You must not re-add nodes to
vRealize Operations Manager that you already
removed. If your environment requires more
nodes, add new nodes instead.
When you perform maintenance and migration
procedures, you should take the node oine, not
remove the node.
Congure NTP Product The nodes in vRealize Operations Manager cluster
synchronize with each other by standardizing on
the master node time or by synchronizing with an
external Network Time Protocol (NTP) source.
Rebalance the Cluster Product You can rebalance adapter, disk, memory, or
network load across vRealize Operations Manager
cluster nodes to increase the eciency of your
environment.
vRealize Operations Manager Customization and Administration Guide
130 VMware, Inc.