These VMs are migrated by DRS to the next host until the last host needs to go into maintenance mode and then they are automatically powered off by EAM. Note: Please ensure to take a fresh backup or snapshot of the vCenter Server Appliance, before going through the steps below. Mark as New; Bookmark; Subscribe; Mute;Why are vCLS VMs visible? Hi, with vSphere 7. Change the value for config. clusters. Select the location for the virtual machine and click Next. It is recommended to use the following event in the pcnsconfig. Announcing End of General Support for vSphere 6. On the Select storage page, select the sfo-m01-cl01-ds-vsan01 datastore and. You can have a 1 host cluster. vmx) may be corrupt. The vCLS agent VMs are lightweight, meaning that resource consumption is kept to a minimum. Unmount the remote storage. These VMs are identified by a different icon than. To override the default vCLS VM datastore placement for a cluster, you can specify a set of allowed datastores by browsing to the cluster and clicking ADD under Configure > vSphere Cluster Service > Datastores. Reply. Successfully stopped service eam. In case the affected vCenter Server Appliance is a member of an Enhanced Linked Mode replication group, please be aware that fresh. Need an help to setup VM storage policy of RAID5 with FTT=1 with dedup and compression enabled vSAN Datastore. Both from which the EAM recovers the agent VM automatically. mwait. vCenter thinks it is clever and decides what storage to place them on. The vCLS vm is then powered off, reconfigured and then powered back on. vCLS decouples both DRS and HA from vCenter to ensure the availability of these critical services when vCenter Server is affected. I click "Configure" in section 3 and it takes the second host out of maintenance mode and turns on the vCLS VM. These services are used for DRS and HA in case vCenter which manages the cluster goes down. DRS will be disabled until vCLS is re-enabled on this cluster. If this tag is assigned to SAP HANA VMs, the vCLS VM anti-affinity policy discourages placement of vCLS VMs and SAP HANA VMs on the same host. vCLS VMs will automatically be powered on or recreated by vCLS service. This issue is expected to occur in customer environments after 60 (or more) days from the time they have upgraded their vCenter Server to Update 1 or 60 days (or more) after a fresh deployment of. Question #61 Topic 1. Note: In some cases, vCLS may have old VMs that did not successfully cleanup. vSphere Cluster Service VMs are required to maintain the health of vSphere DRS" When im looking in to my VM and Templates folers there is an folder called vCLS but its empty. They 100% exist, you can see the files in the datastore when browsing and when you login directly to the ESXi host. Make sure you migrate them to the vCLS storage containers. then: 1. I recently had an issue where some vCLS vm's got deployed to snapshot volumes that were mounted as datastores and then those datastores were subsequently deleted - causing orphaned vCLS objects in vCenter which I removed from inventory. Reply reply Aliasu3 Replies. This can be checked by selecting the vSAN Cluster > VMs Tab, there should be no vCLS VM listed. 1 Solution. This person is a verified professional. The location of vCLS VMs cannot be configured using DRS rules. Failed migrating vCLS VM vCLS (85) during host evacuation. VMware introduced the new vSphere Cluster Services (vCLS) in VMware vSphere 7. Solved: Hi, I've a vsphere 7 environment with 2 clusters in the same vCenter. Log in to the vCenter Server Appliance using SSH. vCLS VMs are always powered-on because vSphere DRS depends on the availability of these VMs. Got SRM in your environment? If so, ensure that the shared datastores are not SRM protected as this prevents vCLS VM deployment. vcls. The vSphere Clustering Service (vCLS) is a new capability that is introduced in the vSphere 7 Update 1 release. Checking this by us, having Esxi 6. Spice (2) flag Report. 300 seconds. Give the cluster a few minutes after the enablement to deploy the vCLS VMs. If running vSphere 7. When you do this vcenter will disable vCLS for the cluster and delete all vcls vms except for the stuck one. The general guidance from VMware is that we should not touch, move, delete, etc. Select the vCenter Server containing the cluster and click Configure > Advanced Settings. n. Why are vCLS VMs visible? Hi, with vSphere 7. ESX cluster with vCLS VMs NCC alert: Detailed information for host_boot_disk_uvm_check: Node 172. But yes vCLS is doing some r/w data on the partitions. For this, Monitor/MWAIT needs to be enabled in. Rod-IT. However, what seems strange is that these VMs have been recreated a whole bunch of times, as indicated by the numbers in the VM names: vCLS (19), vCLS (20), vCLS (21), vCLS (22), vCLS (23), vCLS (24), vCLS (25), vCLS (26), vCLS (27) I've noticed this behavior once before: I was attempting to. Unable to create vCLs VM on vCenter Server. 0 U3. vcls. terminateVMOnPDL is set on the hosts. vMotion both, Storage and Compute, should migrate the vCLS VMs to different Datastores. Click the Configure tab and click Services. See vSphere Cluster Services (vCLS) in vSphere 7. If vCenter Server is hosted in the vSAN cluster, do not power off the vCenter Server VM or service VMs (such as DNS, Active Directory). Per this VMware document, this is normal. The API does not support adding a host to a cluster with dead hosts or removing dead hosts from a cluster. Follow VMware KB 80472 "Retreat Mode steps" to enable Retreat Mode, and make sure vCLS VMs are deleted successfully. The agent VMs are manged by vCenter and normally you should not need to look after them. Check the vSAN health service to confirm that the cluster is healthy. If vCenter Server is hosted in the vSAN cluster, do not power off the vCenter Server VM. chivo243. Article Properties. The problem is when I set the value to false, I get entries in the 'Recent Tasks' for each of the. Once you set it back to true, vCenter will recreate them and boot them up. 0 Kudos 9 Replies admin. clusters. The answer to this is a big YES. Cluster was placed in "retreat" mode, all vCLS remains deleted from the VSAN storage. Admins can also define compute policies to specify how the vSphere Distributed Resource Scheduler (DRS) should place vCLS agent virtual machines (vCLS VMs) and other groups of workload VMs. But the real question now is why did VMware make these. Note: vSphere DRS is a critical feature of vSphere which is required to maintain the health of the workloads running inside vSphere Cluster. However, there are times when we need to migrate or delete these VMs. Deactivate vCLS on the cluster. config. Be default, vCLS property set to true: config. If that host is also put into Maintenance mode the vCLS VMs will be automatically powered off. We have 6 hosts (7. But when you have an Essentials or Essentials Plus license, there appears to be. If a user tries to perform any unsupported operation on vCLS VMs including configuring FT, DRS rules or HA overrides on these vCLS VMs, cloning these VMs or moving these VMs under a resource pool or vApp could impact the health of vCLS for that cluster resulting in DRS becoming non-functional. Reply. Click Edit Settings, set the flag to 'true', and click. 23. Right-click the moved ESXi host and select 'Connection', then 'Connect'. Topic #: 1. vSphere Cluster Service VMs are required to maintain the health of vSphere DRS. It is a mandatory service that is required for DRS to function normally. We would like to show you a description here but the site won’t allow us. . This folder is created by default when new hosts are added into vCenter and used to hold VMs that have been found to be pre-existing on the VMware ESXi host. The questions for 2V0-21. Custom View Settings. You can disable vCLS VMs by change status of retreat mode. flag Report. Enter maintance mode f. . Click Edit Settings, set the flag to 'false', and click Save. Type shell and press Enter. Power-on failure due to changes to the configuration of the VMs - If user changes the configuration of vCLS VMs, power-on of such a VM could fail. Locate the cluster. In total, two tags should be assigned to each VM: a node identifier to map to an AZ and a cluster identifier to be used for a VM anti-affinity policy (to separate VMs between hosts within one AZ). On smaller clusters with less than 3 hosts, the number of agent VMs is equal to the numbers of ESXi hosts. When there are 2 or more hosts - In a vSphere cluster where there is more than 1 host, and the host being considered for maintenance has running vCLS VMs, then vCLS VMs will. Virtual machines appear with (orphaned) appended to their names. Right-click the cluster and click Settings. The vCLS VM is created but fails to power on with this task error: " Feature 'MWAIT' was absent, but must be present". To avoid failure of cluster services, avoid performing any configuration or operations on the vCLS VMs. Viewing questions 61-64 out of 112 questions. First, ensure you are in the lsdoctor-master directory from a command line. To override the default vCLS VM datastore placement for a cluster, you can specify a set of allowed datastores by browsing to the cluster and clicking ADD under Configure > vSphere Cluster Service > Datastores. When changing the value for " config. vCLS. vSphere Cluster Service VMs are required to maintain the health of vSphere DRS. This workflow was failing due to EAM Service unable to validate the STS Certificate in the token. 0 U2a all cluster VMs (vCLS) are hidden from site using either the web client or PowerCLI, like the vCenter API is obfuscating them on purpose. 0. Functionality also persisted after SvMotioning all vCLS VMs to another Datastore and after a complete shutdown/startup of the cluster. 7. ; Use vSphere Lifecycle Manager to perform an orchestrated. A vCLS VM anti-affinity policy describes a relationship between VMs that have been assigned a special anti-affinity tag (e. The datastore for vCLS VMs is automatically selected based on ranking all the datastores connected to the hosts inside the cluster. VCLS VMs were deleted and or previously misconfigured and then vCenter was rebooted; As a result for previous action, vpxd. There are only the two vCLS VMs on the old storage left. #service-control --stop --all. vcls. 5 and then re-upgraded it. Cluster Services health. Click Edit Settings. These services are used for DRS and HA in case vCenter which manages the cluster goes down. VCSA 70U3e, all hosts 7. VMware vCLS VMs are run in vSphere for this reason (to take some services previously provided by vCenter only and enable these services on a cluster level). tests were done, and the LUNS were deleted on the storage side before i could unmount and remove the datastores in vcenter. host updated with 7. Question #: 63. @slooky, Yes they would - this counts per VM regardless of OS, application or usage. Regarding vCLS, I don't have data to answer that this is the root cause, or is just another process that is also triggering the issue. 07-19-2021 01:00 AM. vCLS VMs from all clusters within a data center are placed inside a separate VMs and templates folder named vCLS. Resource Guarantees: Production VMs may have specific resource guarantees or quality of service (QoS) requirements. These VMs should be treated as system VMs. Hey! We're going through the same thing (RHV to VMware). Those VMs are also called Agent VMs and form a cluster quorum. Go to the UI of the host and log in Select the stuck vcls vm and choose unregister. A vCLS VM anti-affinity policy describes a relationship between VMs that have been assigned a special anti-affinity tag (e. The vSphere Clustering Service (vCLS) is a new capability that is introduced in the vSphere 7 Update 1 release. The vSphere Cluster Service (vCLS) was introduced with vSphere 7 Update 1. MSP supports various containerized services like IAMv2, ANC and Objects and more services will be on. Datastore enter-maintenance mode tasks might be stuck for long duration as there might be powered on vCLS VMs residing on these datastores. In case the affected vCenter Server Appliance is a member of an Enhanced Linked Mode replication group, please be aware that fresh. vSphere DRS depends on the health of the vSphere Cluster Services starting with vSphere 7. Note: In some cases, vCLS may have old VMs that did not successfully cleanup. Run this command to retrieve the vpxd-extension solution user certificate and key: mkdir /certificate. 3. Enable vCLS on the cluster. Click on Enable and it will open a pop-up window. The vSphere Clustering Service (vCLS) is a new capability that is introduced in the vSphere 7 Update 1 release. Normally…yesterday we've had the case were some of the vCLS VMs were shown as disconnected; like in this screenshot: Checking the datastore we have noticed that those agents VM had been deployed to the Veeam vPower NFS datastore. 11-14-2022 06:26 PM. Note: Please ensure to take a fresh backup or snapshot of the vCenter Server Appliance, before going through the steps below. So with vSphere 7, there are now these "vCLS" VMs which help manage the cluster when vcenter is down/unavailable. This can be checked by selecting the vSAN Cluster > VMs Tab, there should be no vCLS VM listed. VMware acknowledges the absolute rubbish of 7. Follow VxRail plugin UI to perform cluster shutdown. 0 Update 1. clusters. These VMs should be treated as system VMs. 5 also), if updating VC from 7. The vCLS agent virtual machines (vCLS VMs) are created when you add hosts to clusters. It was related to when you click on a host/cluster where the vCLS VMs reside on. New vCLS VMs will not be created in the other hosts of the cluster as it is not clear how long the host is disconnected. <moref id>. SSH the vCenter appliance with Putty and login as root and then cut and paste these commands down to the first "--stop--". 0. 2. 1. 0U1 install and I am getting the following errors/warnings logged everyday at the exact same time. Die Lebenszyklusvorgänge der vCLS-VMs werden von vCenter Server-Diensten wie ESX Agent Manager und der Steuerungsebene für Arbeitslasten verwaltet. In the Migrate dialog box, clickYes. Unable to create vCLs VM on vCenter Server. " You may notice that cluster (s) in vCenter 7 display a message stating the health has degraded due to the unavailability of vSphere Cluster Service (vCLS) VMs. It has enhanced security for SMB/NFS. 4 the script files must be placed in theMigration of vCLS VMs. See vSphere Cluster Services for more information. Shared Storage Requirements . Existing DRS settings and resource pools survive across a lost vCLS VMs quorum. View solution in original post. Once I disabled it the license was accepted, with the multiple. New vCLs VM names are now vCLS (1), vCLS (2), vCLS (3). 0 U3 it is now possible to configure the following for vCLS VMs: Preferred Datastores for vCLS VMs; Anti-Affinity for vCLS VMs with specific other VMs; I created a quick demo for those who prefer to watch videos to learn these things if you don’t skip to the text below. 2. vCenter Server does not Automatically Provision VCLs Virtual Machines(VMs) (93731) Symptoms. Now I have all green checkmarks. No luck so far. Fresh and upgraded vCenter Server installations will no longer encounter an interoperability issue with HyperFlex Data Platform controller VMs when running vCenter Server 7. 0 VMware introduced vSphere Cluster Services (vCLS). Note: vCLS VMs are not supported for Storage DRS. 3. 2. 0 Update 1, it is necessary, because of above guidelines, to check if vCLS VMs got co-deployed on vSphere ESXi hosts that run SAP HANA production level VMs. clusters. [All 2V0-21. •Module 4 - Retreat Mode - Maintenance Mode for the Entire Cluster (15 minutes) (Intermediate) The vCLS monitoring service runs every 30 seconds during maintenance operations, this means these VMs must be shut down. The vCLS agent virtual machines (vCLS VMs) are created when you add hosts to clusters. See full list on kb. #python lsdoctor. Repeat for the other ESXi hosts in the cluster. For clusters with fewer than three hosts, the number of agent VMs is equal to the number of ESXi hosts. 0U1 install and I am getting the following errors/warnings logged everyday at the exact same time. AndréProcedure. Under Advanced Settings, click the Edit Settings button. vcls. 00200, I have noticed that the vast majority of the vCLS VMs are not visable in vCenter at all. Sometimes you might see an issue with your vSphere DRS where the DRS functionality stopped working for a cluster. Welcome to Werfen Single Sign-On Please enter your Windows/Intranet credentials: Username: PasswordNew MOU between VMS & ILN Memorandum of Understanding (MOU) between VMS & Interfaith Liaison Network (ILN): • Agreement to: –Consult, advise, and collaborate on. vCLS is also activated on clusters which contain only one or two hosts. You cannot find them listed in Host, VM and Templates or the datastore view. enabled" from "False" to "True", I'm seeing the spawing of a new vCLS VM in the VCLS folder but the start of this single VM fails with: 'Feature ‘bad. Yes, you are allowed to SvMotion the vCLS VMs to a datastore of choice, this should preferably be a datastore which is presented to all hosts in the cluster! Jason. Run lsdoctor with the "-t, --trustfix" option to fix any trust issues. ; If this is an HCI. View GPU Statistics60. Wait a couple of minutes for the vCLS agent VMs to be deployed and. 0 Kudos Ian2498. Enter the full path to the enable. Fresh and upgraded vCenter Server installations will no longer encounter an interoperability issue with HyperFlex Data Platform controller VMs when running vCenter Server 7. We have "compute policies" in VMware Cloud on AWS which provide more flexibility, on prem there's also compute policies but only for vCLS VMs so that is not very helpful. If you create a new cluster, then the vcsl vm will be created by moving the first esx host into it. Disconnect Host - On the disconnect of Host, vCLS VMs are not cleaned from these hosts as they are disconnected are not reachable. This folder and the vCLS VMs are visible only in the VMs and Templates tab of the vSphere Client. Up to three vCLS VMs must run in each vSphere cluster, distributed within a cluster. Bug fix: The default name for new vCLS VMs deployed in vSphere 7. At the end of the day keep em in the folder and ignore them. The VMs are not visible in the "hosts and clusters" view, but should be visible in the "VM and templates" view of vCenter Server When you do this vcenter will disable vCLS for the cluster and delete all vcls vms except for the stuck one. The vCLS VMs are probably orphaned / duped somehow in vCenter and the EAM service. g. Re: Maintenance mode - VMware Technology Network VMTN. Then apply each command / fix as required for your environment. vCenter thinks it is clever and decides what storage to place them on. vCLS VM placement is taken care of by the vCenter Server, so user is not provided an option to select the target datastore where vCLS VM should be placed. 0 U2 (Dedup and compression enabled vSAN) . Select the host on which to run the virtual machine and click Next. zip. 0 U3 (18700403) (88924) | VMware KB Click the vCLS folder and click the VMs tab. 0. I know that you can migrate the VMs off of the. Yeah I was reading a bit about retreat mode, and that may well turn out to be the answer. What I want is all VMs that are in a specific cluster AND a specific folder, but attempting any combination of the above throws errors. After the release of vSphere 7. Unlike your workload/application VMs, vCLS VMs should be treated like system VMs. Greetings Duncan! Big fan! Is there a way to programmatically grab the cluster number needed to be able to automate this with powercli. 1. vCLS is also activated on clusters which contain only one or two hosts. Please reach out to me on this - and update your documetation to support this please!. The Datastore move of vCLS is done. 06-29-2021 03:34 AM. vSphere DRS depends on the health of the vSphere Cluster Services starting with vSphere 7. 0. Click Edit Settings. Click Edit Settings, set the flag to 'false', and click Save. <moref id>. As operações de ciclo de vida das VMs do vCLS são gerenciadas por serviços do vCenter, como ESX Agent Manager e Workload Control Plane. Cluster1 is a 3-tier environment and cluster2 is nutanix hyperconverge. Browse to the . I will raise it again with product management as it is annoying indeed. Click Edit Settings, set the flag to 'false', and click Save. My Recent tasks pane is littered with Deploy OVF Target, Reconfigure virtual machine, Initialize powering On, and Delete file tasks scrolling continuously. VM tools are up to date on the VM and the issue only occurs for this VM other VMs on the Host and in the cluster are able to take snapshots and have hardware modified. vcls. To resolve the anomaly you must proceed as follows: vCenter Snapshots and Backup. Create Anti-Affinity for vCLS VMs rule. Be default, vCLS property set to true: "config. Affected Product. I am also filtering out the special vCLS VMs which are controlled automatically from the vSphere side. Follow VMware KB 80472 "Retreat Mode steps" to enable Retreat Mode, and make sure vCLS VMs are deleted successfully. Some datastores cannot be selected for vCLS because they are blocked by solutions like SRM or vSAN maintenance mode. Configuring Host Graphics61. Resolution. Run lsdoctor with the "-r, --rebuild" option to rebuild service registrations. In the vSphere 7 Update 3 release, Compute Policies can only be used for vCLS agent VMs. We tested to use different orders to create the cluster and enable HA and DRS. vcls. py -t. enabled. 0 Update 1 or newer, you will need to put vSphere Cluster Services (vCLS) in Retreat Mode to be able to power off the vCLS VMs. Select the vCenter Server containing the cluster and click Configure > Advanced Settings. I'm trying to delete the vCLS VMs that start automatically in my cluster. 09-25-2021 06:16 AM. vSphere DRS remains deactivated until vCLS is. The old virtual server network that is being decommissioned. 0 U1 and later, to enable vCLS retreat mode. Improved interoperability between vCenter Server and ESXi versions: Starting with vSphere 7. enabled to true and click Save. Click Invoke Method. When you do full cluster-wide maintenance (all hosts simultaneously) the vCLS VMs will be deleted, and new VMs will be created indeed, which means the counter will go up“Compute policies let you set DRS’s behavior for vCLS VMs” Note also that the vCLS virtual machines are no longer named with parenthesis, they now include the UUID instead. ini file for this: event_MonitoringStarted_enableCommandFile = true . 0 U1) in cluster with All Flash VSAN with vCenter 7. 6 ESXi 6. This can be checked by selecting the vSAN Cluster > VMs Tab, there should be no vCLS VM listed. Of course, I can't manually start the vCLSs because they are system managed vms. For example: EAM will auto-cleanup only the vSphere Cluster Services (vCLS) VMs and other VMs are not cleaned up. In the value field " <cluster type="ClusterComputeResource" serverGuid="Server GUID">MOID</cluster> " replace MOID with the domain-c#### value you collected in step 1. 2. I posted about “retreat mode” and how to delete the vCLS VMs when needed a while back, including a quick demo. Enable vCLS on the cluster. Is there a way to force startup of these vms or is there anywhere I can look to find out what is preventing the vCLS vms from starting?. If this is the case, then these VMs must get migrated to hosts that do not run SAP HANA. The new timeouts will allow EAM a longer threshold should network connections between vCenter Server and the ESXi cluster not allow the transport of the vCLS OVF to deploy properly. vcls. Enable vCLS for the cluster to place the vCLS agent VMs on shared storage. Enable vCLS on the cluster. Again, I do not want to encourage you to do this. The cluster has the following configuration:•Recover replicated VMs 3 vSphere Cluster Operations •Create and manage resource pools in a cluster •Describe how scalable shares work •Describe the function of the vCLS •Recognize operations that might disrupt the healthy functioning of vCLS VMs 4 Network Operations •Configure and manage vSphere distributed switchesvSphere DRS and vCLS VMs; Datastore selection for vCLS VMs; vCLS Datastore Placement; Monitoring vSphere Cluster Services; Maintaining Health of vSphere Cluster Services; Putting a Cluster in Retreat Mode; Retrieving Password for vCLS VMs; vCLS VM Anti-Affinity Policies; Create or Delete a vCLS VM Anti-Affinity Policy; Create a vSphere. Unfortunately it was not possible to us to find the root cause. •Recover replicated VMs 3 vSphere Cluster Operations •Create and manage resource pools in a cluster •Describe how scalable shares work •Describe the function of the vCLS •Recognize operations that might disrupt the healthy functioning of vCLS VMs 4 Network Operations •Configure and manage vSphere distributed switchesVMware has enhanced the default EAM behavior in vCenter Server 7. 5. vCLS VMs will need to be migrated to another datastore or Retreat Mode enabled to safely remove the vCLS VM. 2. 0 U1c and later. Enthusiast 07-11-2023 12:03 AM. I've followed the instructions to create an entry in the advanced settings for my vcenter of config. clusters. vcls. log shows warning and error: WARN c. we are shutting. These VMs are created in the cluster based on the number of hosts present. Since the use of parenthesis () is not supported by many solutions that interoperate with vSphere, you might see compatibility issues. I have a 4node self managed vsan cluster, and once upgrading to 7U1+ my shutdown and startup scripts need tweaking (bc the vCLS VMs do not behave well for this use case workflow). Disable EVC for the vCLS vm (this is temporary as EVC will actually then re-enable as Intel "Cascade Lake" Generation. vCLS health turns Unhealthy only in a DRS activated cluster when vCLS VMs are not running and the first instance of DRS is skipped because of this. 0(2d). 1 (December 4, 2021) Bug fix: On vHealth tab page, vSphere Cluster Services (vCLS) vmx and vmdk files or no longer marked as. User is not supposed to change any configuration of these VMs. You shut down the vSphere Cluster Services (vCLS) virtual. The VMs just won't start. The vCLS agent virtual machines (vCLS VMs) are created when you add hosts to clusters. Reply. Deactivate vCLS on the cluster. [05804] [Originator@6876 sub=MoCluster] vCS VM [vim. 03-30-2023 05:18 AM. Enable vCLS for the cluster to place the vCLS agent VMs on shared storage. As a result, all VM(s) located in Fault Domain "AZ1" are failed over to Fault Domain "AZ2". Please wait for it to finish…. #service-control --stop --all. Our maintenance schedule went well. Once you bring the host out of maintenance mode the stuck vcls vm will disappear. Since upgrading to 7. Resource. As VMs do vCLS não. 3, 20842708. If the agent VMs are missing or not running, the cluster shows a warning. Then ESXi hosts reach 100% of the CPU, and all VMs have a huge impact on performance. Madisetti’s infringement opinions concerning U. The article provides steps to disable Retreat Mode using the vSphere Client, APIs/CLIs, and the vSphere Managed Object Browser. keep host into maintenance mode and rebooted. Create and manage resource pools in a cluster; Describe how scalable shares work; Describe the function of the vCLS; Recognize operations that might disrupt the healthy functioning of vCLS VMs; Network Operations. Explanation of scripts from top to bottom: This returns all powered on VMs with just the names only sorted alphabetically;The basic architecture for the vCLS control plane consists of maximum 3 virtual machines (VM), also referred to as system or agent VMs which are placed on separate hosts in a cluster. Each cluster is exhibiting the same behavior. An unhandled exception when posting a vCLS health event might cause the. VMware vCLS VMs are run in vSphere for this reason (to take some services previously provided by vCenter only and enable these services on a cluster level). Enable vCLS for the cluster to place the vCLS agent VMs on shared storage. 4. Unfortunately, one of those VMs was the vCenter.