From vCenter, you can clear the alarm from the virtual machine via the following steps: 1. Right-click the cluster and click Settings. vSphere HA virtual machine HA failover failed. Navigate to Monitor tab, and click Issues and Alarms > Triggered Alarms. I did not mention that SRM mounts datastores at protected site. 1. 3. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"LICENSE","path":"LICENSE","contentType":"file"},{"name":"README. e. This feature monitors the health of the hosts in a cluster and automatically restarts any virtual machines that were running on a failed host on another available host within the cluster. 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. 0 U3, 6. If the vCenter server is self-managed, the Resource settings page is displayed. Because the virtual machines continue to run without incident, you can safely ignore this issue. Virtual machines in the Inventory appear as Unprotected in the vSphere HA (High Availability) Protection column. vSphere HA virtual machine HA failover failed. VMware Virtual Machine. As the use of these options can significantly impact the operation of vSphere HA and hence the availability protection provided, it is highly recommended that users fully understand the use and ramifications of using these options. Host {hostName} has some Fault Tolerance issues for virtual machine {vmName}. vSphere HA Virtual Machine Failover failed. We will simulate a host failure by powering it off. " Not once are these actually related to a HA event or does a VM reboot. vSphere HA detected a possible host failure of this host. We expected that the above-described vSphere cluster HA parameter would change this VM-to-VM Anti-Affinity DRS rule from a must into a should rule during the failover conditions. vSphere HA virtual machine failover failed. If there is no form of communication (datastore/network) possible, what the HA primary will do is it will list all the VMs that are currently not running within that partition. 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). 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. VMFailoverUnsuccessful. german: vSphere HA-Failover einer virtuellen Maschine fehlgeschlagen. Restart HA on the cluster. . Question #: 41. If the vCenter Server reports the hosts as responding: Enable the SSH access to the host. Not always but sometimes we tend to see an alarm on a VM "vSphere HA virtual machine failover failed". For more information about configuring the vSphere Lifecycle Manager remediation settings, see Configuring the vSphere Lifecycle Manager Remediation Settings. There is an issue with vSphere High Availability configuration for this cluster. Step 5. Had a strange issue in where some VMs reported "vSphere HA virtual machine failover failed" I had to reset the alarm to green on the affected VMs. Browse to the cluster in the vSphere Web Client object navigator. Topic #: 1. Press Esc to log out. vmwaredemo. Warning: isAbove to 1048576 Alert: isAbove to 2097152 SendEmail to [email protected] 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. > Veeam VMware: vSphere HA failover failed Alarm Veeam VMware: vSphere HA failover failed Alarm. The number of vSphere HA heartbeat datastores for this host is 0, which is less than required: 2. From Site Recovery Manager perspective, there is no functional impact as all virtual machines are recovered successfully. This option can also be set to "false", whereby the rules are not enforced. Ping the default gateway. Once all Hosts have been unconfigured for HA, check "Turn on VMware HA". Ping the default gateway. vSphere HA virtual machine HA failover failed. Cannot complete the configuration of the vSphere HA agent on the host. Click OK. vmx)Failover did not succeed. vSphere HA leverages a High Availability cluster (a logical grouping of ESXi hosts pooled on the same network) to protect against ESXi hosts, VMs and application failure. vsphere HA virtual machine failover failed. comSimilarly, the Current Memory Failover Capacity is 71% ( (21GB-6GB)/21GB). Run the following command. vSphere Cluster’ında HA’i enable ettiğimizde Host Isolation Response seçeneği Leave powered on durumda ise ve host network’den herhangi bir sebepden dolayı izole oldu ise aşağıdaki hata. Log in to the Passive node through the Virtual Machine Console. You can configure vSphere HA to perform. vSphere HA failed to restart a network isolated virtual machine. If so, update the FDM agent on the affected ESXi hosts. From the left inventory, click Networking. Veeam VMware: Host SSD capacity exceeds the licensed limit for Virtual SAN Alarm. VMware vSphere 8. In this article. All the VMs on this host get the below error: vSphere HA virtual machine failover failed. vSphere HA provides high availability for virtual machines by pooling the virtual machines and the hosts they reside on into a cluster. To enable VM override, first navigate to the cluster and select Configuration. After you resolve this condition, vSphere HA should configure correctly. 5. Change firewall settings,enlarge relevant "connection timeout" settings, consult device vendor for specific steps. Users share their solutions, such as editing the. High Availability (HA) and vSphere Fault Tolerance. Causes. Use the Up/Down arrows to navigate to Troubleshooting Options > Restart Management Agents. Causes. vSphere Cluster Services (vCLS) в апдейте 7. This virtual machine to become protected vsphere HA and HA can not try to restart after a power failure. 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. The two types of rules for which you can specify vSphere HA failover behavior are the following: VM anti-affinity rules force specified virtual machines to remain apart during failover actions. (current) VMware Communities . The VMware’s High Availability feature, also known as VMware HA, is a subset of vSphere Availability and part of the broader vSphere suite of technologies. 0 U3, 6. 0 to ESX5. Here we can perform various. vSphere HA uses clustered ESX hosts to provide rapid recovery in the event of a failover. The message cannot be removed. The most. There is an issue with VMware high-availability protection for this virtual machine. Symptoms Following alert is observed on vCenter: Resolution This alert is triggered whenever a High Availability primary agent declares a host as dead. Resolutions. vSphere 7. This monitor tracks the vCenter alarm alerting that vSphere HA failover in progress. "Setting desired image spec for cluster failed". vSphere Availability VMware, Inc. vSphere HA is unable to power on VM-1 on ESX-02 as it. Veeam VMware: Host SSD capacity exceeds the licensed limit for Virtual SAN Alarm. Press F11 to restart the services. I'm testing esxi 7 and vsphere 7. If it's critical to get the VM online, you can review your Admission Control settings (i. HA may not vMotion the virtual machine to another host. Cause A vCenter HA failover might not succeed for these reasons. 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. The minimum NIC speed should be 1GbE. x. We had an issue in our 5. 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. It’s because the timeout settings in the HA needs to be changed to support this, luckily VMWARE provided a KB article about how to fix: Performing a Reconfigure for VMware HA operation on a primary node causes an unexpected virtual machine failover (2017778) So basically, edit your HA in Adv. 384GB of RAM. In the event of a host failure, you see messages similar to: vSphere HA detected a host failure. Veeam VMware: vCenter License User Threshold Alarm. Step 4 Configure vSphere HA settings on the ESXi hosts. Choose the Virtual Machine Role to enable High Availability. Most of organization will be running its application stack on Multi-tier application fashion and each VM in multi-tier application will have some dependency. 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 Virtual Machine Failover failed. 3. Additionally, when a vSAN node has failed, vSphere HA will restart virtual machines on an alternate host. spanish: Le basculement de la machine virtuelle vSphere HA a échoué. 1. When a vSAN node becomes isolated, vSAN will power o ff virtual machines but will not restart them. Review the event description for detail on the cause. Dedicated Failover Hosts Admission Control You can configure vSphere HA to designate specific hosts as the failover 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. a few virtual machines are showing this. 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. 1. 5, High Availability simply restarts the virtual machine in the failed ESXi hosts and HA is not aware of which VMs depend on other VMs and its application dependency. spanish: Le basculement de la machine virtuelle vSphere HA a échoué. vSphere HA provides high availability for virtual machines by pooling the virtual machines and the hosts they reside on into a cluster. You can configure vSphere HA to designate specific hosts as the failover hosts. If you are talking about vSphere HA then the answer is that you need 2 physical. To clear this alarm on multiple virtual machines, you may select the host, cluster, data center, or vCenter Server object in the left pane and continue with below step to clear the alarms . If you select Disabled, this setting turns off host monitoring and VMs are not restarted when host failures occur. Review the exact description to establish the cause of the event. After failures are detected, vSphere HA resets virtual machines. VM. HA. We will see how virtual machines are recovered from a host that is failed. Click Yes to start the failover. The Passive node fails while trying to assume the role of the Active node. This monitor tracks the vCenter ESX Agent Manager Health Alarm. Under vSphere HA settings, change the Datastore heartbeat to None. 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. Click the vSphere HA switcher to enable High Availability. Virtual machines on a particular datastore shows as unprotected and shows as protected when migrated to a different datastore. Blog; HomeLab. I have a problem witch HA, i have 2 esxi in cluster. The solution is to remove the VMs from inventory and the host, and to disable DRS on the cluster. 0 Kudos scott28tt. The solution is to remove the VMs from. The basis of the vSphere Admission control is the number of host failures that the cluster is allowed to tolerate and that continues to ensure failover. All esx are in single cluster. Right-click the vSphere HA virtual machine failover failed alarm and click Clear. System logs on host are stored on non-persistent storage. vCLS provides a mechanism that allows VMware to decouple both vSphere DRS and vSphere HA from vCenter Server. Everything looks fine except for alerts for all the virtual machines that HA failed to move. Reason: Failed to start the virtual machine. Default vSphere alarms are set on the vCenter Server level and propagated to all child objects in the inventory. There is an issue with the disk for this virtual machine. vsphere HA virtual machine failover failed. Not enough resources for vSphere HA to start VM. For more information, follow the appropriate cross reference. RED Status vSphere HA virtual machine failover failed Alarm (to red) YELLOW Status None. x in a vSphere HA cluster, a virtual machine residing on a local storage is marked as protected, but it cannot failover. vSphere HA virtual machine failed to failover. log file and check if there are errors related to communication with vCenter Server and the host Management Agent. Dedicated Failover Hosts Admission Control You can configure vSphere HA to designate specific hosts as the failover hosts. You will see the new virtual machine listed as a potential virtual machine available for enabling high availability. When a vSAN node becomes isolated, vSAN will power o ff virtual machines but will not restart them. Niels Hagoort wrote a lengthy article on this topic here. Here we can perform various. 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. 7, 7. HA centralizes the guest machines and hosts in a cluster for failover. Instead,. again, this will have no impact on any running guest. Mark as New;. [All 2V0-602 Questions] A vSphere Administrator sees the alarm: vSphere HA virtual machine failed to failover. Power off the virtual machine and disable CBRC to all disks through API. 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. md","path":"README. Topic #: 1. 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. Veeam VMware: Host vSphere Flash resource status Alarm. • AlwaysOn failover cluster instances. VMware vSphere HA Cluster Failure Types. If this is not successful within 5 minutes, a power off response type is executed. Hating to click each one to reset the alarm that wasn’t clearing I found the following solution. One of them (say Host3) just exit Maintenance Mode. High Availability allows you to: Monitor VMware vSphere hosts and virtual machines to detect hardware and guest operating system failures. 0. korean: vSphere HA 가상 시스템 페일오버 실패. I noticed that when I did the reconfiguration some (very few) VM got now alarms "Vsphere HA Virtual Machine failover failed" I have no attention to upgrade the 3 hosts from ESX4. Veeam VMware: Virtual Machine Network Adapter Reservation Status Alarm; Veeam VMware: vSphere Distributed Switch MTU matched status Alarm; Veeam VMware: vSphere Distributed Switch MTU supported status Alarm; Veeam VMware: vSphere Distributed Switch teaming matched status Alarm; Veeam VMware: vSphere Distributed. SNMP,FT Virtual Machines not Placed or Evacuated by vSphere DRS 71 Fault Tolerant Virtual Machine Failovers 72. How to clear the alarm from the virtual machine. This is expected behavior for vSAN clusters. Also, ensure that your admission control settings match your restart expectations if a failure occurs. A pop-up window opens Edit Cluster Settings select vSphere HA radio and turn off (not green) > click OK. Click the Events button. Veeam VMware: vSphere HA failover failed Alarm. vSphere HA virtual machine monitoring action : Monitors whether vSphere High Availability has restarted a virtual machine. For more information about configuring the vSphere Lifecycle Manager remediation settings, see Configuring the vSphere Lifecycle Manager Remediation Settings. . These are new HPE DL380 servers. vSphere HA will retry if the maximum number of attempts has not been exceeded. To clear the alarm from the virtual machine: Select virtual machine with the triggered alarm. vSphere High Availability cluster only supports ESXi 6. log indicating a boot. Details. Under VM Monitoring > VM Monitoring Status select VM Monitoring Only. vSphere HA unsuccessfully failed over. With vSphere HA enabled, let us look at some of its capabilities. Use the Up/Down arrows to navigate to Troubleshooting Options > Restart Management Agents. Hi, There are 3 ESX hosts in our cluster. Causes. event. 0 Kudos a_p_ Leadership 10-17-2020 05:03 AM. Review the event description for detail on the cause. After the failover finishes, you must restart the remediation task on the new. vSphere HA cluster experiences a host failure or a host isolation and one or more virtual machines have failed to failover. Step 2: Create a cluster. Register / Sign In. 0: das. When an ESXi host is down due to a hardware failure and HA/FDM triggered failover of the host's virtual machines, the following alarm may be notified. Maximizing the compatibility between virtual machines and hosts in the cluster can also. 0 Update 1 release VMware introduced a new service called the VMware vSphere Cluster Services (vCLS). If the slot size appears too high, click on the Resource Allocation tab of the cluster and sort the virtual. After you resolve this condition, vSphere HA should configure correctly. 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. I had a problem in a small vSphere 5 infrastructure made up by 2 ESXi 5. From the pop-up window, click Security to open the drop-down menu. 0 or later version. Click on the Alarms tab and then the Triggered Alarms button. When you create a vSphere HA cluster, a single. 2. Veeam VMware: vSphere ESXi Dump Collector Health Alarm; Veeam VMware: vSphere HA VM Component Protection Could Not Power Off a Virtual Machine Alarm; Veeam VMware: vSphere Profile-Driven Storage Service Health Alarm; Veeam VMware: Virtual Machine Network Adapter Reservation Status Alarm; Veeam VMware:. vSphere HA is resetting VM. 7, 7. When vSphere HA performs failover and restarts virtual machines on different hosts, its first priority is. Proceed to. md. 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. After the host is back online, the VM stays offline and gets not powered up again! In the Home screen, click Hosts and Clusters. 2 X Processors (8 Cores each) with HT enabled. It will also want to try to restart those VMs. Those host failure types are: Failure – A failure is unexpectedly what you think. reregisterRestartDisabledVMs: When vSphere HA is disabled on a specific virtual machine this option ensures that the virtual machine is registered on another host after a. With vSphere 7 U1, VMware introduced vSphere Clustering Service (vCLS), which helps in a situation when vCenter Server becomes unavailable. . It was logged around the time when vSphere rebooted following the patch. 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. -Adjust the failover capacity settings: You can adjust the failover capacity settings to reduce the number of virtual machines that need to be failed over in the event of a host failure. If yes, disable this setting and this will always allow VM's to be failed over no matter if there is not enough resources. If HA Virtual Machine Monitoring was responsible for resetting the virtual machine, you see an Event similar to: This virtual machine reset by HA. VMware has qualified vCenter high availability with vCenter 5. vSphere HA is failed over the operation in progress in the cluster in data center. x, 5. Virtual Machine Disk (VMDK) files are stored on shared storage that is accessible to all physical servers connected via the HA cluster. Review the event description for detail on the cause. 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. Once all Hosts have been unconfigured for HA, check "Turn on VMware HA". To review vCenter Server events: In vSphere Client, click the Tasks & Events tab. Results After the host was successfully put into Maintenance Mode using the vCenter console, all active VMs were migrated to other hosts in the cluster with capacity. 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. I am also a blogger and owner of the blog. 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. 2CPUs at 2. Host-based Failover (Local HA) † All virtual machines and their configuration files must reside on shared storage,. When i stop "esxi1" my Test WM switch off and no server switching. The guest operating system on the VMs did not report a power failure. 0 nodes. The vmware-fdm VIB is the package that runs this service on each ESXi host; Powering on virtual machines fails with error:. These vCLS VMs should be ignored from the cluster capacity checks. vSphere HA virtual machine monitoring action. I have a message "Failover of vSphere HA virtual machine failed" no more information. x and 5. No: Cluster: 6. Generally speaking, vSphere HA makes VM automatically restarted on another host when its original host failed to minimize downtime. Enabling High Availability on a. Immortal 02-14-2012 11:51 AM. Select vSphere Availability and click Edit. • Database mirroring. 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. Solved: Hello, I am testing vSphere HA with two ESXi hosts in my lab. button. Performing failover: The virtual machine or its active server is inaccessible, and the system is moving the virtual. Not using identical host hardware in the VMware vSphere HA cluster. EventEx] [info] [] [DC-xxxxx] [87492702] [vSphere HA failover operation in. Alarm 'vSphere HA virtual machine. Select Show cluster entries in the dropdown. ExternalvSphere HA (High Availability) is a feature in VMware vSphere that provides automatic restart of virtual machines (VMs) when a physical host fails. name} failed to become vSphere HA Protected and vSphere HA may not attempt to restart it after a failure. A host has stopped working in some form or fashion due to hardware or other issues. Not enough resource for vSphere HA to start VM. Virtual machine migrates to Site 2 hosts and I/O is directed to the local storage S-VOL on Site 2. The cluster reserves resources so that failover can occur for all running virtual machines on the specified number of hosts. vsphere HA Virtual Machine failover failed Hi, There are 3 ESX hosts in our cluster. Cluster config Issue: vSphere HA initiated a failover action on 1 virtual machines in cluster LabCluster on datacenter DC01. vSphere HA is a feature built into VMware's vSphere software that enables failed virtual machines to be restarted on different host servers to minimize. All Toggle submenu. HA initiated a failover action. Migrating a VM. vSphere HA virtual machine monitoring action : Monitors whether vSphere High Availability has restarted a virtual machine. Actions. 0. Before the first vCLS VM for the cluster is powered-on in a DRS enabled cluster, if users tries to. In the Home screen, click Hosts and Clusters. 00100. From Site Recovery Manager perspective, there is no functional impact as all virtual machines are recovered successfully. Click vSphere HA located under Services. log file and check if there are errors related to communication with vCenter Server and the host Management Agent (hostd). In such a case, the VM Monitoring service determines that the virtual machine has failed and the virtual machine is rebooted to restore service. Virtual machine failover was not successful. Open the vCenter Object and navigate to Monitor > Issues and Alarms > Triggered Alarms. Refer to the online VMware document vSphere Resource Management. Review the /var/log/vpxa. What is a possible cause of this event? A. You. 1. How to enable vSphere promiscuous mode. md","path":"README. [All 2V0-21. I have a cluster consisting of two ESXi hosts. The primary host of a VMware vSphere ® High Availability cluster is responsible for detecting the failure of secondary hosts. These hosts are also sharing a single shared datastore. HA is a great vSphere feature, but a reactive one. On the VM there is a red event: vSphere HA virtual machine failover failed. This is not supported because vSphere HA is not supported with this configuration. Normally due to event "Insufficient resources to fail over this virtual machine. Deselect the Turn On vSphere HA option. The virtual machines guest operating systems never reported a power. How vSphere HA Works. Monitors the host health status reported by vSphere High Availability. vSphere HA enabled VM reset with screenshot. Highlight the erred cluster. The failover capacity of hosts can be defined in three different ways: Cluster resource PercentagevSAN uses its own logical network. On the VM there is a red event: vSphere HA virtual machine failover failed. 4. 1. • Database mirroring. 0 Update 2. 0. 1 cluster with some problems HA. Show Suggested Answer Hide Answer Suggested Answer: B 🗳️ 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. Press F2 to customize the system. Actions. Select Advanced settings. A pop-up window opens Edit Cluster Settings select vSphere HA radio and turn off (not green) > click OK. Is your means: 1- all my host managment network has been disconnected temporarily because this alarm has bee appeared on all of my vm ? i have attached pic from my cluster config. Note: Also with vSphere 7. Veeam VMware: vCenter License Capacity Monitoring Alarm. Best. Configure Heartbeat Datastores 42. Follow the below solution steps to resolve “vSphere HA initiated a virtual machine failover action” configuration issues. 32. Navigate to Monitor tab, and click Issues and Alarms > Triggered Alarms. The error "vSphere HA virtual machine failover failed" occurs when a host is disconnected from the network or has a degraded storage device. If it's critical to get the VM online, you can review your Admission Control settings (i. Click the Configure tab. X-vMotion of a virtual SAN virtual machine from a High Availability (HA) cluster might result in an alarm. " Turning off HA and turning it back on (basically reconfiguring HA on the cluster) 1. Disabling and re-enabling the "vSphere HA virtual machine failover failed" alarm fixed the problem for me. All hosts must be licensed for vSphere HA. Review vCenter Server events to confirm that a vSphere HA failover has occurred. When a number of file system locking operations, virtual machine power ons, power offs, or vMotion migrations occur on a single VMFS volume, this can trigger fault tolerant virtual machines to be failed over. VMware vSphere High Availability (HA) protects a standard cluster from underlying host failure. 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. vSphere HA creates a directory at the root of each datastore that is used for both datastore heartbeating and for persisting the set of protected virtual machines. 4. There is an issue with vSphere High Availability configuration for this cluster. Unisys recommends that you enable vSphere HA and host monitoring for a cluster of virtual machines. vSphere HA virtual machine failover failed. Resolutions. 4. 0, as new hardware will be added soon, and it will be installed directly with ESXi5. simplified chinese. These VMs are necessary to maintain the health of the cluster services. Symptoms. There are various reasons why affected.