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How It works

Have questions about how the Nutanix Platform works? Looking to get started - start here!

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Albert Mendoza

started this topic

New KB Articles Published on Week Ending March 9, 2024

Below are new knowledge base articles published on the week of March 3-9, 2024.KB 16144 - Nutanix Files - "Server has no Shares" error in PC...

Albert Mendoza

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NutonianNutanix Employee

posted in How It works

Nutanix Cluster Upgrade and What It means to you.

We often ask ourselves, what do these various Upgrades entail and what actually happens during an upgrade. Here is a high-level description of what happens during the various Nutanix core software upgrade processes. I have assumed it is a minimum 3-node cluster and you have already determined the Upgrade version. Note for all the Upgrade below, it is important to perform health checks before upgrading any component (check KB 2852). 1. NCC: When : If health checks show no issues, the NCC upgrade can proceed. It is recommended to upgrade to the latest NCC version shown. How : The upgrade process copies NCC software to each Controller VM or Prism Central VM. What Happens : The cluster_health service, which is responsible for health monitoring and the logic underlying cluster alerts, restarts on each node. Caution Level : No services involved in the data path restart hence it is non-intrusive. NCC version does not depend on any other Nutanix component and can be upgraded re

4 years ago

maazNutanix Employee

posted in How It works

AHV networking

AHV uses Open vSwitch (OVS) to connect the CVM, the hypervisor, and guest VMs to each other and to the physical network. Open vSwitch: OVS is an open source software switch implemented in the Linux kernel and designed to work in a multiserver virtualization environment. By default, OVS behaves like a layer-2 learning switch that maintains a MAC address table. Bridges Bridges act as virtual switches to manage network traffic between physical and virtual network interfaces. The default AHV configuration includes an OVS bridge called br0 and a native Linux bridge called virbr0 Ports Ports are logical constructs created in a bridge that represent connectivity to the virtual switch BondsBonded ports aggregate the physical interfaces on the AHV host. By default, a bond named br0-up is created in bridge br0 VLANs for AHV Hosts and CVMs The recommended VLAN configuration is to place the CVM and AHV in the default “untagged” (or native) VLAN, as shown belo

4 years ago

ShvetaDNutanix Employee

posted in How It works

PCVM not loading in any browser but can be successfully logged in through console

All services are Up and running. Other CVMs can ping PCVM. Firefox browser loads with Error Message "Secure Connection Failed" and the Code "PR_END_OF_FILE_ERROR". Solution Try one of the 2 methods to resolve this: 1)Try to make new profile via `about:profiles` and set it to default. If it is working, export your bookmarks from the old profile and import them to the new profile. 2) Simply restart the existing profile. Solution reference from community Mozilla support:https://support.mozilla.org/en-US/questions/1267074

4 years ago

Mohammed111Nutanix Employee

posted in How It works

Acropolis Dynamic Scheduling (ADS)

Acropolis Dynamic Scheduling (ADS) is responsible to examine the load on various components for hotspots and calculate what migrations can be done to balance the load without causing additional hotspots. Lazan is the dynamic scheduling service for AHV. Lazan monitors the following resources: Total CPU usage of each of the guest VMs. Storage controller (stargate) CPU usage per VM or iSCSI target. Lazan does NOT monitor the following: Memory. Apart from ensuring its migration tasks are within memory limits ( including HA), Lazan does not load balance based on memory usage. Networking. Overview of how Lazan works: The Lazan manager gathers stats from the components it monitors. The Lazan solver (runner) checks the stats for potential anomalies and determines how to resolve them, if possible. The Lazan manager invokes the tasks (e.g. VM migrations) to resolve the situation. When is a HOTSPOT detected by Lazan? Lazan runs every 1

4 years ago

Farqad AlAliVoyager

asked in How It works

ipmi vlan (disabled | enabled) | physical connectivity

if the ipmi vlan option is disabled and i configured the switch side ports to a specific vlan, Will i be able to reach the ipmi if i connect my workstation to an interface in the switch with same vlan or do i need to enable the vlan option in nutanix and put the vlan tag as well.?

4 years ago

Sergei IvanovNutanix Employee

posted in How It works

Alert: Fingerprinting is disabled by Stargate

You may get an alert from NCC stating that the deduplication fingerprinting has been disabled, but it is enabled on a container: WARN: Fingerprinting is disabled by stargate, but configured on Storage Container(s) As we know, Stargate is the service that is managing storage on a Nutanix cluster, so Stargate has some conditions on which it will automatically disable deduplication. If the metadata usage is higher than 250Gb on a node. If the metadata usage is higher than 50% of the total metadata space on a node. The second condition is common on small size clusters, for example NX-1000 series, with single-SSD nodes if the SSD size is small. The metadata is located on the SSDs and the total metadata size on the node is equal to the capacity of: One SSD in single-SSD nodes Two SSDs in double-SSD nodes Four SSDs in all-flash nodes So, for example, if you have a node with 1 SSD which is 480Gb in size, 50% of the metadata capacity will be 240Gb (in fact it will b

4 years ago

AScoyneTrailblazer

asked in How It works

How long does LCM inventory take?

How long does LVM inventory take? We have a 7 node cluster and it takes a very very long time to inventory. There are 202 tasks. It started an hour and 20 minutes ago and its only on task 63 out of 202. Is this normal? We are running LCM 2.3.1.3.18618.

4 years ago

AnishWalia20Nutanix Employee

posted in How It works

Manage multiple UVMs at once using custom aCLI scripts on a Nutanix cluster

There would be scenarios where in a system administrator or an engineer managing a Nutanix cluster would want to say: Perform some action like shutdown, power-on, delete, take a snapshot, clone etc ib bulk or on multiple VMs at once with some matching critearia such as say common Starting names, or common ending names, some pattern in names and all the powered-on UVMs etc. One way is to one-by-one go and perform that action from Prism for each of those VMs which is very tedious in scenarios where say we have 20 VMs etc on which we want to perform same actions say like shutting them down. What can we do ? In such scenarios we can use some basic shell scripting along with aCLI(Acropolis command line tool). So aCLI is a cmdline tool for managing hosts, networks snapshots, UVMs etc on a Nutanix cluster. Here is a document which explains how to use aCLI https://portal.nutanix.com/page/documents/details?targetId=Command-Ref-AOS-v5_17%3Aman-acli-c.html. So below are some

2 years ago

Sebastian AntunezWayfarer

asked in How It works

Manual upgrade AOS

Hello I have a cluster with 3 nodes and AOS 5.10.10 and need upgrade to 5.15 but the nodes not have access to Internet. I upload the AOS 5.15 and show me in the Prism Console the versionm but not permit run the upgrade to new version. Need to know if is possible run the upgrade directly through cli to update the cluster. Thanks for your comments

4 years ago

Albert MendozaNutanix Employee

posted in How It works

New KB Articles Published on Week Ending July 11, 2020

Below are new knowledge base articles published on the week of July 5-11, 2020. KB 8935 - NCC Health Check: recovery_point_limit_exceeding_check KB 9479 - Deprecation of manual multihoming CVM network configuration KB 9621 - Xi Leap - After failover on Xi, floating IP is not getting assigned to the VM KB 9626 - AHV | Common VM NIC management workflows KB 9628 - AHV | Windows VM running in UEFI mode with SATA disk may fail to boot after disk expansion KB 9632 - 3rd party backup restore jobs can fail having INTERNAL ERROR: ErrorCode: 4 in AOS 5.15.1 KB 9640 - AHV | Cluster memory usage graphs may show different numbers if "HA Reservation" option is enabled Note: You may need to log in to the Support Portal to view some of there articles.

4 years ago

NashmaNutanix Employee

posted in How It works

Quick Start Guide to PC Upgrade

Prism Central is a centralized management tool that runs as a separate instance comprised of either a single VM or a set of VMs. This multi-cluster view, allows you to monitor and manage multiple clusters through a single web console. If you would like to deploy a Prism Central instance, you can either follow the 1-Click method or the manual method. Do you have a Prism Central(PC) instance deployed in your environment and are planning to upgrade it? Here is the second installation of the Upgrade Series as promised to provide you quick tips and tricks to plan and execute your upgrade activities with ease. Prism Central Guide for the latest version (as of 10th of July, 2020) can be found here. To check for the release notes or Guide, navigate to Nutanix Support Portal > Menu> Documentation > Prism and filter out the PC version from the top right section of the dropdown. Note: PC upgrades is necessarily just a reboot activity on the Prism Central Virtual Machine(s)

4 years ago

Sergei IvanovNutanix Employee

posted in How It works

Nutanix services: Xtrim - what it is and why it is needed

Starting from AOS 5.10.2 and newer, if you run the ‘cluster status’ command, you may see that there is a new service running on the cluster called Xtrim. That service was not present before 5.10.2: Xtrim is the service that is going to improve the performance of the cluster. If we look a bit deeper, it improves the write performance by periodically trimming the SSDs. In Nutanix all the disks are passed-through from the host to the CVM and the CVM is managing the disks, so the Xtrim service running on CVMs is doing the trimming of the physical SSDs. So, what is trim? TRIM is a command with the help of which the operating system can tell the solid state drive (SSD) which data blocks are no longer needed and can be deleted, or are marked as free for rewriting. In other words, TRIM is a command that helps the operating system know precisely where the data that you want to move or delete is stored. That way, the solid state drive can access only the blocks holding the data. Further

4 years ago

hienleOutrider

asked in How It works

Upgrade firmware on HPE DX by using Darksite LCM

Hi, I have built up a Darksite LCM running in my own local network and have Internet access to download necessary Darksite bundles for upgrading. In my testing evironment, the server works flawlessly with Dell XC cluster and Nutanix cluster as well but with DX cluster, it cannot provide any firmware update at this time though currently at least 1 node in our cluster is running on an old SPP version (2019.03.01). For our DX environment: Node1: 2020.03.0 SPP Node2: unverified? (LCM cannot detect the SPP version) Node3: 2019.03.01 SPP Does anyone have any idea on this case?

4 years ago

AlonaNutanix Employee

posted in How It works

Quick fix for a 'broken' ipmitool - Can't access ipmitool from CVM

Quick tip for a hump day. Rushing in to check something quickly on the IMPI. Can’t be bothered with the Web interface. Jumping into a CVM CLI only to find out that the ipmitool isn’t working and the error isn’t helpful. Could not open device at /dev/ipmi0 or /dev/ipmi/0 or /dev/ipmidev/0: No such file or directoryGet Device ID command failedUnable to open SDR for reading Good news is the IPMI is most likely fine. Chances are all you need to do is to use a few extra keys as part of the ipmitool command. Remember that for all calls executed from a CMV the ipmitool has to authenticate with the IPMI and the calls are traversing the network technically even if it is only a virtual switch. KB-1345 Using ipmitool on the CVM gives full command syntaxis and is rich with examples. For Dell hardware refer to KB-6007 [ipmi] Could not open device at /dev/ipmi0 on Dell hardware. If you are a proud owner of AHV host there is an extra option available for you which is to check the ipmitool service

4 years ago

jzm2delapazTrailblazer

asked in How It works

Capacity planning tool

Hi Expert, I would like to seek your assistance with regards to the capacity planning for Nutanix. Our prism cluster is not license so we can’t use the built in capacity planning tool. Is there any other way where i can get the historical value of CPU, memory and disk per AHV cluster? I’m a little bit new in Nutnix so I’m still curving up my skills. TIA

4 years ago

jittrunnVoyager

asked in How It works

How to list operating system in all virtual machine in AHV environment ?

Hi all, I have almost 200 Virtual machine in my AHV environment . Is there anyway to summary operating system in each virtual machine, Does it have any tool like rvtool in vmware ?

4 years ago

NashmaNutanix Employee

posted in How It works

Quick Start Guide to NCC Upgrade

This article covers the first component in a Generic Nutanix Environment Upgrade cycle - NCC. This is the first installation of the component-wise Upgrade guides series. Check out this article for a quick walk-through of the overview for a cluster-wide upgrade cycle. Nutanix Cluster Check (NCC) is a framework of scripts that can help diagnose cluster health. NCC runs on clusters and on Prism central. The workings of NCC on PC and the cluster are pretty much the same except the checks involved in the respective modules are different. NCC also includes the Logbay plug-in. Logbay is the utility used to collect logs from Controller VMs and hosts that are useful for troubleshooting issues. NCC Guide for the latest version (as of 7th of July, 2020) can be found here. To check for the release notes or Guides, navigate to Nutanix Support Portal > Menu> Documentation > NCC and filter out the NCC version from the top right section of the dropdown. Note: NCC upgrades are do

4 years ago

Albert MendozaNutanix Employee

posted in How It works

New KB Articles Published on Week Ending July 4, 2020

Below are new knowledge base articles published on the week of June 28-July 4, 2020. KB 9466 - Pre-Upgrade Check: test_is_nos_upgrade_supported KB 9541 - SSR with error "Disk attached successfully but partition couldn't be mounted" KB 9564 - Cost Governance Memory Metrics KB 9575 - Prism Metro Availability error: Prechecks for starting metro availability failed for the protection domain to the remote site KB 9601 - [Karbon 2.1] How to create a Kubernetes cluster with Calico via API Note: You may need to log in to the Support Portal to view some of these articles.

4 years ago

randyramandaniTrailblazer

asked in How It works

Node failure

hi team, i want to ask something, in my understanding nutanix can tolerates 1 node failure if I use rf 2 where the data will be replicated into 2 pieces, what happens if I have 10 nodes, how much nutanix can tolerance of node failure at the same time? it still tolerates only 1 node failure or any other mechanism? I am confuse after read this kb https://portal.nutanix.com/page/documents/details/?targetId=Web-Console-Guide-Prism-v5_17%3Aarc-host-failure-c.html

4 years ago

NagarjunbAdventurer

asked in How It works

Fetch the Cluster Info from PE

Hi Team,I am trying to export cluster info with the below code which I got from the internet (do not remember where I got this). but the below script runs fine and able to export the data required except for Cluster name and its IP address.As per my understanding it is able to export only the content of “NTNXHost” but not the content of “NTNXClusterInfo” and “NTNXVM”$report = @()$NTNXHost = Get-NTNXHost | Select-Object name,hypervisorAddress,clusterUuid,serviceVMId,serviceVMExternalIP,ipmiAddress,serial,blockSerial,blockModel,blockModelName,cpuModel,numCpuCores,numCpuThreads,numCpuSockets,cpuFrequencyInHz,cpuCapacityInHz,memoryCapacityInBytes,hypervisorFullName,hypervisorType$report+=$NTNXHost$NTNXClusterInfo = Get-NTNXClusterInfo | Select-Object name,clusterExternalIPAddress$report+=$NTNXClusterInfo$report += "`r`n"$NTNXVM = Get-NTNXVM -SearchString "VM is a Nutanix CVM" | ft vmname,ipAddresses$report+=$NTNXVM$report | Export-Csv -Path C:\temp\ClusterInfo.csv -NoTypeInformation -UseC

4 years ago

JayakumarTrendsetter

asked in How It works

Bridges and Bonds

Is it mandatory to give the bond name parameter while updating the uplinks in bridges? -Jai

4 years ago

ZarakasVoyager

asked in How It works

Protection Domain Status Powershell

Hi I m working to automate the planned failover of protection domain. We are very familiar with powershell and so I m wondering what is the cmdlet to retrieve the status of protection domain (Enabled- in sync, disabled , pending ...) ? I searched on the documentation but i didn’t find it Thanks

4 years ago

Sergei IvanovNutanix Employee

posted in How It works

Are NGT and VMware tools compatible?

When you run ESXi hypervisor on Nutanix you may get a question: should I install VMware tools or Nutanix Guest Tools (NGT) or both? Are NGT and VMware tools compatible between each other? The answer is yes, they are compatible and can be both safely installed on the same virtual machine. If you install NGT in guest VMs, you can use the following advanced features (NGT applications): File Level Restore CLI Nutanix VM Mobility VSS requestor and hardware provider for Windows VMs Application-consistent snapshot for Linux VMs You can read in more details about the NGT here. VMware tools in turn has different features and a different purpose. Installing VMware Tools eliminates or improves these issues: Low video resolution Inadequate color depth Incorrect display of network speed Restricted movement of the mouse Inability to copy and paste and drag-and-drop files Missing sound Provides the ability to take quiesced snapshots of the guest OS Synchronizes the time in the guest o

4 years ago

jzm2delapazTrailblazer

asked in How It works

AHV cluster to AHV cluster VM guest os Migration

Hi Experts, Would it be possible to do a mass migration from AHV Cluster to another AHV cluster? My objective is to free up the resources of my current AHV cluster and move other VM’s to the newly build AHV cluster. Appreciate your advice and best approach.

4 years ago

SEdgeVoyager

asked in How It works

Change Cluster Name from Unnamed to Something Else

When I run the following <:~$ ncli multicluster get-cluster-state I get this output, Cluster Id : bff29593-35c0-4f5a-804f-257374c3e979 Cluster Name : Unnamed Is Multicluster : true Controller VM IP Addre... : [10.250.130.151] External or Masqueradi... : Controller VM NAT IP A... : Marked for Removal : false Remote Connection Exists : true Question is how can I change Cluster Name to something other than Unamed???

2 years ago

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