6.5.1
Table Of Contents
- vSphere Availability
- Contents
- About vSphere Availability
- Business Continuity and Minimizing Downtime
- Creating and Using vSphere HA Clusters
- Providing Fault Tolerance for Virtual Machines
- vCenter High Availability
- Plan the vCenter HA Deployment
- Configure the Network
- Configure vCenter HA With the Basic Option
- Configure vCenter HA With the Advanced Option
- Manage the vCenter HA Configuration
- Set Up SNMP Traps
- Set Up Your Environment to Use Custom Certificates
- Manage vCenter HA SSH Keys
- Initiate a vCenter HA Failover
- Edit the vCenter HA Cluster Configuration
- Perform Backup and Restore Operations
- Remove a vCenter HA Configuration
- Reboot All vCenter HA Nodes
- Change the Appliance Environment
- Collecting Support Bundles for a vCenter HA Node
- Troubleshoot Your vCenter HA Environment
- Patching a vCenter High Availability Environment
- Using Microsoft Clustering Service for vCenter Server on Windows High Availability
- Index
vSphere HA Interoperability
vSphere HA can interoperate with many other features, such as DRS and vSAN.
Before conguring vSphere HA, you should be aware of the limitations of its interoperability with these
other features or products.
Using vSphere HA with vSAN
You can use vSAN as the shared storage for a vSphere HA cluster. If enabled, vSAN aggregates the specied
local storage disks available on the hosts into a single datastore shared by all hosts.
To use vSphere HA with vSAN, you must be aware of certain considerations and limitations for the
interoperability of these two features.
For information about vSAN, see Administering VMware vSAN.
N You can use vSphere HA with vSAN stretched clusters.
ESXi Host Requirements
You can use vSAN with a vSphere HA cluster only if the following conditions are met:
n
All the cluster's ESXi hosts must be version 5.5 or later.
n
The cluster must have a minimum of three ESXi hosts.
Networking Differences
vSAN has its own network. If vSAN and vSphere HA are enabled for the same cluster, the HA interagent
trac ows over this storage network rather than the management network. vSphere HA uses the
management network only if vSAN is disabled. vCenter Server chooses the appropriate network if vSphere
HA is congured on a host.
N You can enable vSAN only if vSphere HA is disabled.
If you change the vSAN network conguration, the vSphere HA agents do not automatically pick up the
new network seings. To make changes to the vSAN network, you must take the following steps in the
vSphere Web Client:
1 Disable Host Monitoring for the vSphere HA cluster.
2 Make the vSAN network changes.
3 Right-click all hosts in the cluster and select for vSphere HA.
4 Re-enable Host Monitoring for the vSphere HA cluster.
Table 2-2 shows the dierences in vSphere HA networking whether or not vSAN is used.
Table 2‑2. vSphere HA Networking Differences
vSAN Enabled vSAN Disabled
Network used by vSphere HA vSAN storage network Management network
Heartbeat datastores Any datastore mounted to > 1 host,
but not vSAN datastores
Any datastore mounted to > 1 host
Host declared isolated Isolation addresses not pingable and
vSAN storage network inaccessible
Isolation addresses not pingable and
management network inaccessible
vSphere Availability
24 VMware, Inc.