How It works

NTP i.e. Network Time Protocol is a critical component of the Nutanix cluster and is crucial in keeping up hardware, processes, services and applications running with time synchronization across one another.  Inconsistencies in time synchronization could lead to undesirable consequences, not to mention the potential disastrous impact it could have on databases and real time applications through operational failures.  The downside of a poor NTP scenario could be data loss, hard to detect security breaches, even leading to legal liabilities, and loss of credibility.  NTP alerts are generated when you run the NCC Health checks, and are typically shown as below:Detailed information for check_ntp:Node 172.24.0.143:FAIL: The hypervisor is not synchronizing with any NTP server. This might occur if none of

Witness VM in Metro Availability Configuration:A "Witness" is a special VM that monitors the Metro Availability configuration health. The Witness resides in a separate failure domain to provide an outside view that can distinguish a site failure from a network interruption between the Metro Availability sites. It can only be configured on AHV and ESXi hypervisors.The main functions of a Witness include:· Making a failover decision in the event of a site or inter-site network failure.· Avoiding a split-brain condition where the same storage container is active on both sites due to (for example) a WAN failure.· Handling situations where a single storage or network domain fails.To learn about the different scenarios you might encounter and the requirements of a witness VM,

Getting this error when I try to use putty/plink for any ACLI-related command:bash: ACLI: command not foundDoesn't seem to matter what acli “command” i run, even just running “acli” by its self gives the same error. I am able to run commands like “hostname” etc using plink/putty on the CVM. Feel like im missing something very simple here.Example command:putty $cvmIP -l $username -pw $password “acli vm.disk_get $vmname disk_addr=scsi.0”

Below are new knowledge base articles published on the week of September 6-12, 2020.KB 9960 - AD user cannot manage PC and NCC upgrades after upgrading to PC 2020.8 version KB 9980 - Cluster outage may occur during an LCM upgrade when restoring block fault-tolerance KB 9981 - SSP | VM nic update task performed by SSP user may fail on Prism Central 5.17 and above versions KB 9985 - Intermittent Network Disconnects Due to MAC Learning Disabled When Using AHV Bond Mode Balance-SLB

Do you know Support Cases can be Scheduled on Support Portal?Support Portal users that are working with Nutanix Support can elect to schedule a follow-up for a case. The instructions within the case page are designed to be self-explanatory on how to schedule. However, you may want to understand how a case is handled when scheduled prior to using the feature. Portal Scheduling Overview The scheduling feature is only presented under the following conditions: Support contract allows for 24x7 coverage

While doing LifeCycle Manager (LCM) upgrades, Nutanix infrastructure customers could encounter failures on the SATADOM upgrade on a ESXi Host, with the message:"Operation failed. Reason: Lcm prechecks detected 2 issues that would cause upgrade failures.Check 'test_hypervisor_config' failed with 'Failure reason: APD/VMCP feature is enabled on cluster, Please disable, Please refer KB 6470'Check 'test_min_phoenix_version' failed with 'Failure reason: APD/VMCP feature is enabled on cluster, Please disable, Please refer KB 6470' You can try disabling the APD using the following command on the Host:

The CVMs that comprise a Nutanix cluster get their time by syncing to a single member which is known as the NTP Leader (aka Genesis Master). This node will be responsible for syncing with whatever NTP servers the customer added to Prism. When NTP is properly configured, the Leader CVM will set its own clock to the time provided by the server and then all other CVMs will sync with the Leader's time.  For AHV clusters, the same list of servers used by the NTP Leader will be configured on each host to sync with independently. All other hypervisors need to have NTP configured separately using their unique management tools. By default User VMs sync their time with the local hypervisor where they are running, but users can configure their machines to sync with local or internet-based NTP servers as well. 

A Cluster can be licensed following these simple stepsStep 1 is to download a Cluster Summary File(CSF)On your Prism home screen, click on the Gear Wheel (top right of the screen) --> Licensing --> Update License -->Download.The CSF will be generatedStep 2 is to generate a License Summary File(LSF)Login to your support portal account and continue with the steps belowClick on the Menu Icon ---> Licenses --> Licenses--> Manage Licenses --> Upload the CSF. Based on the product for which you are applying the license(AOS, Files, Prism Pro, Flow, Buckets etc), select the License type from the cards visible and click on Next, then download which will generate the LSF.Step 3 is uploading LSF to the Prism Access the Prism Console, under the Licensing page, Upload t

Helloafter reinstalling Prism Central (PC) from v.5.16.1.3 to v5.17.1.1, using the procedure for unregistering PCUnregistering cluster from PChttps://portal.nutanix.com/page/documents/details?targetId=Prism-Central-Guide-Prism-v5_5:mul-vcenter-server-unregister-pc-t.htmlwe have some strange issues:- A PC REST API query return 2 available cluster (one for PE and one for PC, with different uuid on metadata)It is normal for API 3.1? - On Nutaniy API Explorer a simle query of vms "POST /vms/list"With small payload for "get_entities_request"{ "kind": "vm", "length": 10, "offset": 0}returns { "api_version": "3.1", "code": 500, "message_list": [ { "message": "Internal Server Error. Failed to get schema for cluster 000597eb-aa13-1c72-0000-000000029cf0", "reason": "INTERNAL_ERR

I don’t see anywhere to acknowledge or remove this alert, it is no longer an issue and we resolved what was causing the issue but it keeps showing that we have a critical alert for the 28th.

Before you begin Before you decide to change the CVM, hypervisor host, and IPMI IP addresses, consider the possibility of incorporating the existing IP address schema into the new infrastructure by reconfiguring your routers and switches instead of Nutanix nodes and CVMs. If that is not possible and you must change the IP addresses of CVMs and hypervisor hosts, proceed with the procedure described in this document. Guest VM downtime is necessary for this change, because the Nutanix cluster must be in a stopped state. Therefore, plan the guest VM downtime accordingly. Verify if your cluster is using the network segmentation feature.nutanix@cvm$ network_segment_

Can anyone let me know the release date of the LCM Framework  version 2.3.3 ?

Below are new knowledge base articles published on the week of August 30-September 5, 2020.KB 9605 - Alert - A120094 - cluster_memory_running_out_alert_insights KB 9932 - Calm: NCC checks against the incorrect IP in dataservice_connectivity_check resulting in false positive. KB 9937 - Alert ID 111066 - Failed to send alert emails KB 9940 - Nutanix SMTP and Spamhaus KB 9954 - HPEDX: IPMI IP change during Expand Cluster is not taking effect due to

Can you imagine performing firmware upgrades manually?Checking compatibility matrix for each component, procuring ISOs and staging them, take days to perform firmware upgrade and one can only hope that the host/cluster is still functioning after everything is said and done.LCM simplifies Nutanix IT infrastructure life cycle operations by consolidating software and firmware component upgrades into a unified control plane. LCM does all the hard work of managing all the upgrade dependencies for the software and firmware components. You don't have to worry about a thing. 

Did you know that many of the health checks and alerts within Prism can be configured according to alert policies?Though it is usually a good idea to leave alert configurations at their default values, some alerts (or checks) can be adjusted to accommodate particular needs through an associated alert policy. For example, if there is a known condition within an environment in which an associated alert goes purposefully and perpetually ignored or overlooked, the associated health check can simply be turned off.Alerts can also be enabled/disabled based upon a particular severity level (i.e. Info, Warning or Critical). Also, even better than outright disabling an alert or check, some alert policies can be configured for auto-resolution if the condition has not recurred within the proceedi

Hello everyone. I want to allocate IP to the cloned VM using sysprep through the blog address below.https://www.nutanix.dev/2020/02/06/customizing-ahv-vms/ However, the IP is not changed through the script in the blog.In addition, it was confirmed that the host name and password were changed. The versions I am testing are windows 10, windows server 2016. Please, let me know. Thanks,Regards

In AOS 5.0, you can expand the disk online. In versions older than AOS 5.0, you needed to go offline to expand the disk and then online again. But before expanding the disk you will need to increase the size of the volume group. The size the disk in a volume group can be increased using the Prism GUI or the aCLI or nCLI. This article describes the increasing the size of the volume group disk using nCLI and aCLI and also shows how to expand the disk online in Windows guest OS. Expand disk size of Volume Group through aCLI and nCLIFrom aCLI:Starting from AOS 5.x, the disk can be expanded without taking it offline.Increase the size of the disk:nutanix@cvm$ acli vg.disk_up

Below are the top knowledge base articles for the month of August 2020.KB 4116 - NX Hardware [Memory] – Alert - A1187, A1188 - ECCErrorsLast1Day, ECCErrorsLast10Days KB 7503 - NX Hardware [Memory] – G6, G7 platforms - DIMM Error handling and replacement policy KB 1540 - What to do when /home partition or /home/nutanix directory is full KB 4141 - Alert - A1046 - PowerSupplyDown KB 4158 - Alert - A1104 - PhysicalDiskBad

how can we export nutanix snapshot to server that are not in the Nutanix?

I was writing a quick PowerShell script this morning and I wanted to get all of the VMs in Prism Central via the v3 API calls. I was struggling with the syntax until I found this post:v3 - vms/list - Host to get full list of VMs? The post lead me to this article:The Five Hundred (500+ VMs via v3 API) The article lead me to this code sample:list_vm_v3_large.py After reading those articles a few times I still didn’t understand what I needed to do...I finally figured it out. I could piece together the v3 API

Below are new knowledge base articles published on the week of August 23-29, 2020.KB 9683 - Move: User privileges required for migrating Resource Pool based VMs KB 9760 - When creating/updating a Recovery plan on Network settings' page, Production and Test failover subnets are not shown correctly and a message 'No options available' is displayed in the UI KB 9819 - VM power on failure on AWS. Error: Failed to PlugNic KB 9848 - SSP - Project creation failed error "user_capability mandatory field: username is missing"

Do you know you can run a individual log collector just for LCM logs if you are having any troubles running updates from LCM?LCM (Life Cycle Manager) Log Collection Utility provides an independent script designed to collect all the important log files necessary to debug any LCM issue.The utility is available in LCM version 2.2 or later by default. It could also be used on earlier versions of LCM.Functionality:Collects LCM log files. Detects if the node is stuck in Phoenix and collects kernel logs. Collects logs for the services with which LCM interacts (Example: Foundat

Nutanix customers using AHV as their Hypervisor often need to evaluate resources being used/consumed on their infrastructure.  One of those factors involved is in calculating how much space has been consumed by one or more Virtual Machines.  It is possible to get granular in this scenario and be able to calculate the amount of space taken up by a VM.  Depending on their environment, it should be possible or feasible for one to print out the space usage in terms of Bytes, KiloBytes, MegaBytes or GigaBytes.I have developed the following string manipulation to be able to get those numbers.  Here is a sample from one of the checks I performed:nutanix@NTNX-20FM6L56789-A-CVM:172.31.1.11:~$nutanix@NTNX-20FM6L56789-A-CVM:172.31.1.11:~$ acli vm.list | grep 120-Windows-Invent120-Windows-Invent

Hi ,We have Hyper-V running on UCS, Need to expand Storage piece of it , so Can I build Storage Only AHV cluster with 3 nodes and provide ABS volume as datastore ?Please guide other options.

Do you know you can expand Prism central VM from one to three instances to support moreworkloads?If Prism Central is running on a single VM currently, you can expand it to three VMs. This increases both capacity and resiliency of Prism Central (at the cost of maintaining two additional VMs).  To scale-out Prism Central instance across multiple VMs, we can follow steps below: Click Gear icon and then select Prism Central Management from Settings menu Manage Prism Central page appears which provides information about Prism Central Instance.  To expand Prism Central instance from one to three VMs, click the Scale Out PC button to display the Scale Out PC page and do the following: