vsphere ha virtual machine failover failed. Veeam VMware: vCenter License Capacity Monitoring Alarm. vsphere ha virtual machine failover failed

 
Veeam VMware: vCenter License Capacity Monitoring Alarmvsphere ha virtual machine failover failed  One of them (say Host3) just exit Maintenance Mode

vSphere HA Virtual Machine failover unsuccessful. 3. [All 2V0-602 Questions] A vSphere Administrator sees the alarm: vSphere HA virtual machine failed to failover. Mark as New;. We just want to migrate VM to the ESX host that just exit from. Details. e. This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. event. The default is two and the maximum valid value is five. Migrating a virtual machine to another host using vMotion or DRS vMotion. From Port groups tab, select VM Network and click Actions > Edit settings. Right-click the vSphere HA virtual machine failover failed alarm and click Clear. ResolutionsIn the vSphere Web Client, navigate to the vCenter Server instance. RDS on VMware – vSphere Cluster Resiliency and High Availability VMware vSphere High Availability vSphere HA provides easy-to-use, cost-effective, high availability for applications running in virtual machines. vsphere HA virtual machine failover failed. Unfortunately there is no option to remove or acknowledge the message. After the host is back online, the VM stays offline and gets not powered up again! In the Home screen, click Hosts and Clusters. Maximizing the compatibility between virtual machines and hosts in the cluster can also. For example, we have a 2-node cluster and a Separate Virtual Machines rule defined to place VM-1 on ESX-01 and VM-2 on ESX-02. vSphere will retry if the max number of attempts has not been exceeded. When this alert is triggered, it means that one or more virtual machines failed to get powered on by a host in a cluster protected by HA. The primary host of a VMware vSphere ® High Availability cluster is responsible for detecting the failure of secondary hosts. VM monitoring action – Default alarm to alert when vSphere HA reset a virtual machine; Failover failed – Default alarm to alert when vSphere HA failed to failover a virtual machine; And there is the following host related alarm: HA status – Default alarm to monitor health of a host as reported by vSphere HA; To configure these default. All of Microsoft SQL Server availability technologies are supported on the core vSphere platform, including: • Log shipping. When you edit a DRS affinity rule, you must use vSphere HA advanced options to enforce the desired failover behavior for vSphere HA. This virtual machine to become protected vsphere HA and HA can not try to restart after a power failure. " Not once are these actually related to a HA event or does a VM reboot. This is expected behavior for Virtual SAN clusters. When you perform a X-vMotion of a virtual SAN virtual machine from HA cluster to a different cluster and to a different storage, the virtual machine reports an alarm similar to vSphere HA virtual machine failover failed. Actions. High availability technologies reduce the period of outage sustained by services during failure, allowing for a rapid recovery of virtual machines. Not always but sometimes we tend to see an alarm on a VM "vSphere HA virtual machine failover failed". On the Failures and Responses section, select Enable Host Monitoring. 0 to ESX5. Causes. After the host is back online, the VM stays offline and gets not powered up again!Then edit settings of your cluster, go to Cluster Features and uncheck "Turn on VMware HA". One of them (say Host3) just exit Maintenance Mode. Also, ensure that your admission control settings match your restart expectations if a failure occurs. 1 cluster with some problems HA. You will see the new virtual machine listed as a potential virtual machine available for enabling high availability. So I guess I can move those VMs back to that server and simply clear the alarms? Question #: 52. Blog; HomeLab. I am also a blogger and owner of the blog. The reset ensures that services remain available. Virtual machine failover was not successful. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. Default vSphere alarms are set on the vCenter Server level and propagated to all child objects in the inventory. During a Site Recovery Manager workflow, post Test Recovery or Failover operations, some of recovered virtual machines might throw the following alarm: vSphere HA virtual machine failover failed. Niels Hagoort wrote a lengthy article on this topic here. Setting Alarms to Monitor Cluster Changes. vmdk, *. Alarm 'vSphere HA virtual machine failover failed' on XXXX changed from Gray to Green. This monitor tracks the vCenter alarm that alerts when vSphere HA failed to failover a virtual machine. Refer to the online vSphere. VMware vSphere 8. Resolutions. Tried: Re-enable HA + DRS ;. We had an issue in our 5. Clicking on this reveals the VM Overrides selection box. vSphere HA unsuccessfully failed over. vSphere Cluster HA provides high availability for virtual machines by pooling the virtual machines and the hosts they reside on into a cluster. When the service restarts, press Enter. Steps to restart the HA service: In vCenter vSphere Client URL go to the Host Cluster > Configure > vSphere Availability > vSphere HA is Turned ON >. HomeLab Actual State; HomeLab ToDo; HomeLab Journey. Perform a vSphere Replication recovery of the virtual machine. And I am a bit confused from the documentation, maybe my. In the Value field,type the value for the specified key. We are seeing several alarms being triggered for vSphere HA virtual machine failover failed on two of our clusters. To enable HA repeat the above steps and select Turn on VMware HA option. We will see how virtual machines are recovered from a host that is failed. See VMware documentation for more information. Best Practices for VMware vSphere256 High Availability Clusters47. 0, as new hardware will be added soon, and it will be installed directly with ESXi5. AllBelow are possible types of High Availability status: Performing switchover: Issues occurred on the active server of the virtual machine, and the system is performing live migration of the virtual machine to the passive server. Ancak, bir ana bilgisayar yani ESXi sunucu herhangi bir sebepten dolayı izole oldu ise bu hata ile “ vSphere HA virtual machine failed to failover ” karşılaşabilirsiniz. Enabling High Availability on a. As you know, if you lose vCenter Server, you also lose the Distributed Resource Scheduler (DRS), so your VMs are no longer balanced across your. Ping the default gateway. Veeam VMware: vCenter License User Threshold Alarm. During a Site Recovery Manager workflow, post Test Recovery or Failover operations, some of recovered virtual machines might throw the following alarm: vSphere HA virtual machine failover failed. Lock-lost question was answered by vSphere HA. Review VMware online documents such as Troubleshooting VMware High Availability and the vSphere. Traditional high availability clusters provide automated fault recovery: it is a reactive technology that responds to unplanned outages at the host hardware, vSphere and virtual machine. One of them (say Host3) just exit Maintenance Mode. Hi all, I have 7 esxi 5. vCLS on a cluster configures a quorum on vCLS system VMs on the cluster. For more information, see VMware High Availability configuration issues when an iSCSI Service Console is on the same network (1003789). From the Home screen, click on Hosts and Clusters. vSphere HA (VMware High Availability): VMware vSphere HA (High Availability) is a utility included in VMware's vSphere software that can restart failed virtual machines (VMs) on alternative host servers to reduce application downtime. SDDCs with more than one node provide data redundancy through various configurations of Redundant Array of Inexpensive Disk (RAID) along with Failure to Tolerate (FTT), which defines the number of host and device failures that a virtual. Virtual Machine Failure Monitoring. If vSphere HA is not able to reboot all the virtual machines of the failed server, for example if it has insufficient resources, vSphere HA attempts to restart those. After a vSAN cluster fails with a loss of failover quorum for a virtual machine object, vSphere HA might not be able to restart the virtual machine even when the cluster quorum has been restored. Select Advanced settings. Log in to the VMware vSphere Client. 0 vCenter where HA did not appear to be functioning correctly. vSphere HA virtual machine HA failover failed. To do this you need to create another cluster as a test. The virtual machine violates failover when it attempts to power on. How to enable vSphere promiscuous mode. Workaround: Perform the following steps to take a VM snapshot after you extend the size of a VM's virtual disks. This information pane. In the event of a vSphere HA failover, you see messages similar to. The correct answer is: Virtual Machine consolidation Needed status – Default alarm that is triggered when VM consolidation needed status is set, No compatible host for Secondary VM – Default alarm to monitor if no compatible hosts are available to place Secondary VM, Timed out starting. Best Practices for VMware vSphere256 High Availability Clusters47. If vSphere HA is not able to reboot all the virtual machines of the failed server, for example if it has insufficient resources, vSphere HA attempts to restart those. vCLS provides a mechanism that allows VMware to decouple both vSphere DRS and vSphere HA from vCenter Server. VM monitoring action – Default alarm to alert when vSphere HA reset a virtual machine; Failover failed – Default alarm to alert when vSphere HA failed to failover a virtual machine; And there is the following host related alarm: HA status – Default alarm to monitor health of a host as reported by vSphere HA; To configure these. Add the disk group back to the same host and remediate the vSAN File Service for this cluster using the vSAN user interface. 0. vSphere HA Virtual Machine Failover failed. 2 by reading the release notes!I'm testing esxi 7 and vsphere 7. When I try to reconfigure HA on the host. Dedicated Failover Hosts Admission Control You can configure vSphere HA to designate specific hosts as the failover hosts. Then we change the DRS setting to aggressive and run HA reconfigure on the other two ESX hosts (Let us call them Host1 and Host2). Click Yes to start the failover. local that contains two virtual machines. Power off – This option performs an unclean shutdown, similar to he machine going down during a power outage. With the slot policy option, vSphere HA admission control ensures that a specified number of hosts can fail and sufficient resources remain in the cluster to fail over all the virtual machines from those hosts. Hosts in the cluster are monitored and in the event of a failure, the virtual machines on a failed host are restarted on alternate hosts. 2 X Processors (8 Cores each) with HT enabled. Click Configuration, and you should see the VM Overrides option. vSphere HA guarantees the restart only when it has a cluster quorum and can access the most recent copy of the virtual machine object. simplified chinese. There is an issue with the disk for this virtual machine. The name of the directory is . The vSphere HA agent on this host cannot reach some of the management network addresses of other hosts, and HA may not be able to restart VMs if a host failure occurs: FQDN:IP Virtual machines do not failover to other hosts in the cluster when High Availability (HA) is triggered. When a vSAN node becomes isolated, vSAN will power o ff virtual machines but will not restart them. A vSphere Administrator sees the alarm: vSphere HA virtual machine failed to failover This occurred for a number of virtual machines on a particular ESXi host in a cluster with vSphere High Availability (HA) enabled. vmwaredemo. For more information about configuring the vSphere Lifecycle Manager remediation settings, see Configuring the vSphere Lifecycle Manager Remediation Settings. 1 to 5. Generally speaking, vSphere HA makes VM automatically restarted on another host when its original host failed to minimize downtime. Question #: 41. I ran the command /sbin/services. Reply. Here are a few notable alternatives to Proxmox: ⚘ VMware vSphere. Click OK. Steps to restart the HA service: In vCenter vSphere Client URL go to the Host Cluster > Configure > vSphere Availability > vSphere HA is Turned ON >. This monitor tracks the vCenter Server alarm triggered when a vSphere HA virtual machine fail over fails. For Monitoring Sensitivity select a preset or choose custom settings. Press F2 to customize the system. vSphere HA virtual machine failover failed : Monitors whether a failover operation that uses vSphere High Availability failed. Choose the Virtual Machine Role to enable High Availability. Configuration. Failed to flush the data to the Passive node. RED Status vSphere HA virtual machine failover failed Alarm (to red) YELLOW Status None. Jump to solution. vSphere HA Admission Control To look for events related to the virtual machine in vCenter Server: Select the virtual machine in vCenter Server. 0: das. And I am a bit confused from the documentation, maybe my. You will see the new virtual machine listed as a potential virtual machine available for enabling high availability. The failed VM stays disconnected until the host is rebooted and back online 😕 It doesnt get reconnected or restarted on another host. Veeam VMware: Expired Virtual SAN license Alarm. Mark as New;. I have a problem witch HA, i have 2 esxi in cluster. To reinstall the vSphere HA agent VIB: Reconfigure HA on a cluster level. From the pop-up window, click Security to open the drop-down menu. The vSphere HA checklist contains requirements that you must be aware of before creating and using a vSphere HA cluster. Here are a few notable alternatives to Proxmox: ⚘ VMware vSphere. This fault occurs when the HA configuration of CPU or memory resources reserved for failover is violated or is insufficient for the DRS operation. The number of vSphere HA heartbeat datastores for this host is 0, which is less than required: 2. vSphere Availability VMware, Inc. Once a cluster has been configured for "Retreat Mode," virtual machine workloads will continue to operate, but cluster features such as vSphere High Availability (vSphere HA) and Distributed Resource Scheduler (DRS) will be degraded until the vSphere Cluster Service VMs have been successfully re-deployed. What happened? If the vSphere HA virtual machine monitoring action alarm reappear, you can try reinstalling VMware Tools and re-enabling vSphere HA VM Monitoring feature. You. Select vSphere Availability and click Edit. Navigate to Monitor tab, and click Issues and Alarms > Triggered Alarms. This is expected behavior for vSAN clusters. Actions. If you are talking about vSphere HA then the answer is that you need 2 physical. GREEN (clear) Status vSphere HA virtual machine failover failed Alarm (to green) Yes. In such a case, the VM Monitoring service determines that the virtual machine has failed and the virtual machine is rebooted to restore service. vmwaredemo. HA must respect VM anti-affinity rules during failover-- When the advanced option for VM anti-affinity rules is set, vSphere HA does not fail over a virtual machine if doing so violates a rule. 2. Customer had a power event - all servers are now back up and running, but the cluster summary message (and the little alert triangle) are still showing up. We have been trying to gif a server 14GB of ram and make a full reservation for it. One of them (say Host3) just exit Maintenance Mode. Check whether the ESX Agent Manager service is running. Reply. 0 to ESX5. See VMware online documents such as Troubleshooting VMware High Availability and the vSphere Troubleshooting Guide to resolve HA issues. I am employed by ITQ, a VMware partner as a Senior Consultant. After you resolve this condition, vSphere HA should configure correctly. Default vSphere alarms are set on the vCenter Server level and propagated to all child objects in the inventory. HA may not vMotion the virtual machine to another host. With vSphere HA enabled, let us look at some of its capabilities. Prior to vSphere 6. . It pools the virtual machines and the hosts they reside on into a cluster for monitoring, automatically restart failed virtual machines on alternative host servers to reduce application downtime. Successfully upgraded. Review the exact description to establish the cause of the event. vSphere HA virtual machine failover unsuccessful. Veeam VMware: vSphere HA failover in progress on vSphere Cluster. HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. 2 - i have 3 host on my cluster Is your means that all of esxi managment network has been dc and there was not any host for restart vms and start them on the. Connect to the ESXi host using SSH. Causes. HA continuously monitors capacity utilization and “reserves” spare capacity to be able to restart virtual machines. Press F2 to customize the system. Causes. 1. Click Edit near vSphere HA that is turned off in our case. Running ESXi 6. Insufficient resources to fail over VM Name in Cluster Name that recides in Datacenter Name. 0U1 позволяет размещать набор системных машин в кластере vSAN. X-vMotion of a virtual SAN virtual machine from a High Availability (HA) cluster might result in an alarm. This is where the power of fault tolerance comes in. During a Site Recovery Manager workflow, post Test Recovery or Failover operations, some of recovered virtual machines might throw the following alarm: vSphere HA virtual machine failover failed. 0 Kudos Troy_Clavell. Click vSphere HA located under Services. On the VM there is a red event: vSphere HA virtual machine failover failed. How vSphere HA Works. A failover cluster is a group of at least two servers or nodes that are configured to take over workloads when one node is down or unavailable. Then click on the Configure tab and vSphere Availability, click Edit on the button for vSphere HA is Turned OFF/ON. From vCenter, you can clear the alarm from the virtual machine via the following steps: 1. Actual exam question from VMware's 2V0-21. In the vSphere Client, browse to the vSphere HA cluster. vCenter HA etkinleştirildiğinde, oluşan sunucuların farklı fiziksel sunucularda çalışması için sistem tarafından otomatik olarak VM/Host Rules oluşturulur. If it's critical to get the VM online, you can review your Admission Control settings (i. When a VM misses a heartbeat, VMware HA deems this VM as. 3. Veeam VMware: Host SSD capacity exceeds the licensed limit for Virtual SAN Alarm. Create a vSphere HA cluster for VMware VM failover step by step. Instead,. 0 Kudos Troy_Clavell. vSphere HA virtual machine HA failover failed. From Site Recovery Manager perspective, there is no functional impact as all virtual machines are recovered successfully. It could be a result of insufficient resources to power the VM on. Choose the Virtual Machine Role to enable High Availability. What is a possible cause of this event? A. Symptoms Following alert is observed on vCenter: Resolution This alert is triggered whenever a High Availability primary agent declares a host as dead. "Setting desired image spec for cluster failed". Right-click the vSphere HA virtual machine failover failed alarm and click Clear. Clone via HTTPS Clone with Git or checkout with SVN using the repository’s web address. 3. The virtual machines guest operating systems never reported a power event. Search for events with vSphere HA in the description. vSphere HA virtual machine HA failover failed. Follow the below solution steps to resolve “vSphere HA initiated a virtual machine failover action” configuration issues. Veeam VMware: vCenter License Capacity Monitoring Alarm. ExternalResolution. A pop-up window opens Edit Cluster Settings select vSphere HA radio and turn off (not green) > click OK. The cluster reserves resources so that failover can occur for all running virtual machines on the specified number of hosts. • Database mirroring. New HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. vsphere HA failover in progress I have a warning on my cluster. comHA initiated a virtual machine failover action in cluster Prod-Cluster in datacenter Prod-DataCenter. vSphere HA virtual machine HA failover failed. A user asks for help with a problem that causes alerts to appear when logging in to the web UI of vCSA 7. Normally due to event "Insufficient resources to fail over this virtual machine. Click Failures and Responses and then expand Host Failure Response. This is expected behavior for vSAN clusters. Refer to VMware Online Documentation for more information about vSphere HA failover problems. 1 cluster with some problems HA. Monitors the host health status reported by vSphere High Availability. 5. 4 Kudos. In such cases, virtual machine execution is not interrupted, but redundancy is. [1-1] [2023-05-11T16:27:44. Separate Virtual Machine for vCenter HAvSphere HA virtual machine failover failed. Navigate to the cluster in Hosts and Clusters section, right-click the name, and click Settings. See VMware online. The guest operating system on the VMs did not report a power failure. Details. The failover capacity of hosts can be defined in three different ways: Cluster resource PercentagevSAN uses its own logical network. 0 Kudos a_p_ Leadership ‎10-17-2020 05:03 AM. Admission control policy is enabled and Failover Capacity is 1 host. I have a cluster consisting of two ESXi hosts. Go to Configure> vSphere Availability> Edit. Click on the Alarms tab and then the Triggered Alarms button. I even tried on a stand alone host which is not added to. If the vCenter Server has not yet marked a failed ESXi host as not responding, the virtual machines on it may still have a status of powered on from the vCenter Server perspective. If you create a DRS affinity rule for your cluster, you can specify how vSphere HA applies that rule during a virtual machine failover. Below is the CPU and. GREEN (clear) Status vSphere HA virtual machine failover failed Alarm (to green) Yes. Select from the following configuration options. The summary tab of the virtual machine displays the warning: The virtual machine failed to become. There exists an KB article about this. I am also unable to modify the Alarm Frequency, as it is greyed out. If so, update the FDM agent on the affected ESXi hosts. This is one of a series of KB articles that provide information about default vSphere alarms for virtual machines. Additionally, when a vSAN node has failed, vSphere HA will restart virtual machines on an alternate host. Element vib failed to validate content'] fdm-installer. I can manually clear the alarm but comes back after a while. This virtual machine to become protected vsphere HA and HA can not try to restart after a power failure. On the Failures and Responses section, select Enable Host Monitoring. See vSphere Resource Management for more information on anti-affinity rules. In a partitioning scenario, each partition will have its own primary node. What is VM Failover and How to Create vSphere HA How to access services and applications with minimum disruption? How to protect VM workloads? This article will. Migrating a VM. Same with vCenter Server. [All 2V0-602 Questions] A vSphere Administrator sees the alarm: vSphere HA virtual machine failed to failover. . "This is expected behavior in VMware vCenter Server 5. Select vSphere Availability in the Services section of the Configure page for your cluster. To enable HA repeat the above steps and select Turn on VMware HA option. From Site Recovery Manager perspective, there is no functional impact as all virtual machines are recovered successfully. 168. Click the Events button. The vSphere HA availability state of the host <slave hostname> in cluster in HA_DRS_Cluster in Datacenter has changed to Election vSphere HA unsuccessfully failed over <virtual machine> on <slave hostname> in cluster HA_DRS_Cluster in Datacenter. vSphere HA Virtual Machine Failover failed. spanish: Le basculement de la machine virtuelle vSphere HA a échoué. Insufficient vSphere HA failover resources. Virtual machine failover was not successful. 5. In this article. However, as the vSAN File Service node is a virtual machine that is pinned to the host it is running, the vSphere HA operation to migrate this virtual machine to other hosts will fail. After that test though it has never worked again, every single time i do any kind of test it always fails with the same generic alarm trigger "vSphere HA Virtual Machine Failover Failed". We will simulate a host failure by powering it off. What happened?If the vSphere HA virtual machine monitoring action alarm reappear, you can try reinstalling VMware Tools and re-enabling vSphere HA VM Monitoring feature. Select the virtual machine in vCenter Server. This combination can result in a more balanced cluster after vSphere HA has moved virtual machines to different hosts. The failed VM stays disconnected until the host is rebooted and back online 😕 It doesnt get reconnected or restarted on another host. VMware Virtual Machine. after restating of that esx, vms become active but power off condition. PR 2337784: Virtual machines on a VMware vSphere High Availability-enabled cluster display as unprotected when power on If an ESXi host in a vSphere HA-enabled cluster using a vSphere Virtual Volumes datastore fails to create the . You have correctly selected 6. Recently I ran into an issue where HA triggered on a cluster but failed. 5, 6. HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. vSphere HA will retry the failover. A Primary or Secondary VM can fail over even though its ESXi host has not crashed. vSphere HA is failed over the operation in progress in the cluster in data center. After a host failure, the highest priority VM fails to restart while VMs in high priority restart. 0 U2. After failures are detected, vSphere HA resets virtual machines. With vSphere 7 U1, VMware introduced vSphere Clustering Service (vCLS), which helps in a situation when vCenter Server becomes unavailable. How to enable vSphere promiscuous mode. 168. Resolve Hostnames. vSphere HA will retry if the maximum number of attempts has not been exceeded. There were a large majority of VM's with HA alarms stating the VM could not failover. Veeam VMware: vSphere HA failover failed Alarm. This is expected behavior for vSAN clusters. Virtual Machine Failure Monitoring is technology that is disabled by default. From Site Recovery Manager perspective, there is no functional impact as all virtual machines are recovered successfully. Hosts in the. After the failover, you can verify that the Passive node has the role of the Active node in the vSphere Client. To clear the alarm from the virtual machine: Select virtual machine with the triggered alarm. x. HCX supports vSphere environments running VMware vSphere 8. I can manually clear the alarm but comes back after a while. VMware vSphere High Availability is a utility that restarts failed VMs on alternative host servers to reduce downtime for critical applications. Set percentages depending to be approximately 1. HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. 2 in cluster ALG-Cluster . Availability. HA failover does not occur after setting Traffic Type option on a vmknic to support witness traffic If you set the traffic type option on a vmknic to support witness traffic, vSphere HA does not automatically discover the new setting. 0 or later version. md","path":"README. Depending on the type of failure detected, the virtual machines running on the hosts might need to be failed over. When I reboot one of the 4 hosts (there is a VM running on the host),The HA failover failed on it. This script has not been checked by Spiceworks. Click on the Set Up vCenter HA button to start the setup wizard. Monitors the host health status reported by vSphere High Availability. 0. HA determines the current failover capacity of the cluster, which is the number of hosts that can fail and still leave enough slots to satisfy all the powered-on virtual machines. Review the /var/log/vpxa. comSimilarly, the Current Memory Failover Capacity is 71% ( (21GB-6GB)/21GB). Select the datacenter object first and then right click > New cluster. “Insufficient resources to satisfy configured failover level for vSphere HA”. 2. The vmware-fdm VIB is the package that runs this service on each ESXi host; Powering on virtual machines fails with error:. Topic #: 1. See the host's Hardware Status tab for more details. What is VMware HA in vSphere? VMware vSphere High Availability (HA) is a clustering feature that is designed to restart a virtual machine (VM) automatically in case of failure. By default, the alarm is triggered by the following event: vim. Click Settings in the context menu. Troubleshooting vSphere HA Failure Response.