6.7
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
- How Fault Tolerance Works
- Fault Tolerance Use Cases
- Fault Tolerance Requirements, Limits, and Licensing
- Fault Tolerance Interoperability
- Preparing Your Cluster and Hosts for Fault Tolerance
- Using Fault Tolerance
- Best Practices for Fault Tolerance
- Legacy Fault Tolerance
- Troubleshooting Fault Tolerant Virtual Machines
- Hardware Virtualization Not Enabled
- Compatible Hosts Not Available for Secondary VM
- Secondary VM on Overcommitted Host Degrades Performance of Primary VM
- Increased Network Latency Observed in FT Virtual Machines
- Some Hosts Are Overloaded with FT Virtual Machines
- Losing Access to FT Metadata Datastore
- Turning On vSphere FT for Powered-On VM Fails
- FT Virtual Machines not Placed or Evacuated by vSphere DRS
- Fault Tolerant Virtual Machine Failovers
- 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
3 Change the vCenter Server Appliance configuration for the Active node, for example, from a Small
environment to a Medium environment.
4 Reconfigure vCenter HA.
Collecting Support Bundles for a vCenter HA Node
Collecting a support bundle from all the nodes in a vCenter HA cluster helps with troubleshooting.
When you collect a support bundle from the Active node in a vCenter HA cluster, the system proceeds as
follows.
n
Collects support bundle information from the Active node itself.
n
Collects support bundles from Passive and Witness nodes and places them in the commands directory
on the Active node support bundle.
Note The collection of support bundles from the Passive and Wittness nodes is a best effort and
happens if the nodes are reachable.
Troubleshoot Your vCenter HA Environment
In case of problems you can troubleshoot your environment. The task you need to perform depends on
the failure symptoms. For additional troubleshooting information, see the VMware Knowledge Base
system.
n
vCenter HA Clone Operation Fails During Deployment
If the vCenter HA configuration process does not create the clones successfully, you have to resolve
that cloning error.
n
vCenter HA Deployment Fails with an Error
Deployment failures can be caused by configuration issues, especially problems with the networking
setup.
n
Troubleshooting a Degraded vCenter HA Cluster
For a vCenter HA cluster to be healthy, each of the Active, Passive, and Witness nodes must be fully
operational and be reachable over the vCenter HA cluster network. If any of the nodes fails, the
cluster is considered to be in a degraded state.
n
Recovering from Isolated vCenter HA Nodes
If all nodes in a vCenter HA cluster cannot communicate with each other, the Active node stops
serving client requests.
n
Resolving Failover Failures
When a Passive node does not become the Active node during a failover, you can force the Passive
node to become the Active node.
n
VMware vCenter
®
HA Alarms and Events
If a vCenter HA cluster is in a degraded state, alarms and events show errors.
vSphere Availability
VMware, Inc. 88