How It works

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

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Albert Mendoza
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Albert Mendoza
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Top KB Articles for October 2022

Below are the top knowledge base articles for the month of October 2022.KB 1540 - [AOS Only] What to do when /home partition or /home/nutani...
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Albert Mendoza
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Albert Mendoza
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New KB Articles Published on Week Ending October 29, 2022

Below are new knowledge base articles published on the week of October 23-29, 2022.KB 13136 - NCC Health Check: microservice_infrastructure_...
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Alona
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Alona
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Help us help you! Assign Support Contact to your Nutanix assets.

We know you care about your infrastructure. Every time and auto support ticket is created for one of Nutanix clusters a Support Engineer con...
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1222 Topics

S
sysvialinkExplorer
asked in How It works

REST API PE Clone customization

Hi everyone, I’m trying to clone a vm with a cloud-init customization but i don’t know how to put the cloud-init in the userdata string. Thanks for you help

4
AnishWalia20
Nutanix Employee
2 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works

New KB Articles Published on Week Ending May 16, 2020

Below are new knowledge base articles published on the week of May 10-16, 2020. KB 9304 - Object Store Deployment Failure: type[CREATE]:code: 400, message: Primary MSP deployment in failed state status_code: 400 KB 9329 - ESXi | 1 click upgrade failing with 'Could not find a trusted signer' KB 9333 - Prism Central - Adding same email address under both "report settings" as well as "schedule settings" causes duplicate emails to be sent to recipient KB 9349 - [Nutanix Objects][Common Deployment Failure Scenario] Failed to create Envoy VM | Prism Central is not able to reach MSP and Envoy VMs or slow image download KB 9354 - Error: Node XXX cannot be removed: Cluster needs at least 5 usable nodes KB 9368 - Karbon UI stuck at loading in case of old browser version KB 9377 - [Karbon] Darksite Deployment fails in Proxy Environment in ETCD Deployment Stage KB 9383 - AHV | manage_ovs tool shows error "Failed to send RPC request. Retrying." when trying to change bridge configuration KB 9389 - D

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Albert Mendoza
Nutanix Employee
3 years ago
P
PeWuAdventurer
asked in How It works

API vms stats history

Hello, I am trying to collect some VM performance data from Prism element. I have noticed that some stats do not keep history for more than 5 minutes.   Example: controller_io_bandwidth_kBps vs. controller_read/write_io_bandwidth_kBps   GET 'https://{IP}:9440/PrismGateway/services/rest/v1/vms/{vmid}/stats/?metrics=controller_io_bandwidth_kBps&startTimeInUsecs=1589462400000000&intervalInSecs=300'   "statsSpecificResponses": [     {       "successful": true,       "message": null,       "startTimeInUsecs": 1589462400000000,       "intervalInSecs": 300,       "metric": "controller_io_bandwidth_kBps",      "values": [         8106,         5500,         8404,         5618,         12793       ]     }   ] } GET 'https://{IP}:9440/PrismGateway/services/rest/v1/vms/{vmid}/stats/?metrics=controller_read_io_bandwidth_kBps&startTimeInUsecs=1589462400000000&intervalInSecs=300' {   "statsSpecificResponses": [     {       "successful": true,       "message": null,       "startTimeIn

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C
Nutanix Employee
2 years ago
H
HervePathfinder
asked in How It works

2 nodes cluster in 2 rooms

Hi team, it’s a question about architecture : ROBO Site customer has two rooms (another one for the witness is possible) customers would like a node in each room  hypervisor : ESXi According to the docs, there's no reason not to do it ? is this architecture supported or not, and better is there somewhere a documentation about this design ? Many thank for your help.

3
N
Nutanix Employee
2 years ago
Y
yshabirVoyager
asked in How It works

Types of Foundations

Can any one list out how many types of Foundation are there eg Foundation Pro, bare metal ..etc. 

3
Alona
Nutanix Employee
3 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works

New KB Articles Published on Week Ending May 9, 2020

Below are new knowledge base articles published on the week of May 3-9, 2020. KB 9220 - Changing ownership of applications, blueprints and users to other projects in CALM not supported. KB 9326 - "Open in Prism" button on the Insights Portal is deactivated KB 9340 - [Objects][MSP] Troubleshooting Deployment Failures due to docker pull issues KB 9341 - Calm: Cloning ESXi Template fails with "The resource 'xxx' is in use. com.vmware.vim.vpxd.dvs.portinuse.label" KB 9342 - Genesis crash-looping due to missing entries in iso_whitelist.json file Note: You may need to log in to the Support Portal to view some of these articles.

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Albert Mendoza
Nutanix Employee
3 years ago
M
micmaher001Adventurer
asked in How It works

REST API to Convert IDE Disks to SCSI

Hi Folks,   I have a few machines I would like to convert from IDE to SCSI.   I understand this can be done with acli. The procedure is to clone the ide disk and replace it for the VM.   nutanix@cvm$ acli vm.disk_create <vm_name> clone_from_vmdisk=<vmdisk_UUID> bus=scsi   However, I’d like to do this in PowerShell given I’ve already started developing down that track. I have PowerShell cmdlets to snapshot and shutdown the VM which are recommended steps before performing this task.   I didn’t see a cmdlet to perform the clone and replacement, so I turned to the REST API. I am fairly new to Nutanix to I wanted to get some feedback on whether this is the right approach or at least that its not going to break anything other than my test VM. $uri = "https://$ntxCluster/api/nutanix/v2.0/vms/$($vm.vmid)/disks/attach"$body = '{"uuid":"abcdefg-08h3-4i44-95j0-kl44m82no758","vm_disks":[{"vm_disk_clone":{"disk_address":{"device_bus":"SCSI","device_index":123}}}]}'$headers=@{}$headers.A

9
M
3 years ago
P
petepAdventurer
posted in How It works

Automating Protection Domain Failover

Hi All, Wondering if anyone has scripted the addition and configuration of nic’s for VM’s that have failed over in a PD? Noticed a few posts from a few years ago but seeing if approach has changed at all. My approach (no script yet): Check which PD’s have become active at remote site to get list of vm’s grab mac and ip info from a mainted csv (plan to use dhcp reservations on dhcp server) Add nic’s with info grabbed from csv Perform some DNS updates Power on Interested to know what others are doing and any feedback on my approach would be appreciated. Thanks! -PeteP

1
R
Nutanix Employee
2 years ago
M
moatasemAdventurer
asked in How It works

Cluster can not tolerate 1 node failure(s) and guarantee available rebuild capacity

Hi all I have a 3 nodes cluster with RF2. I keep getting the following critical alert: Cluster can not tolerate 1 node failure(s) and guarantee available rebuild capacity Cluster cannot tolerate 1 node failure. Current usage of 6552243087527 bytes exceeds max limit of 9010877278002 bytes. I’m not sure which storage this error is about, the numbers in the error is way to big to what the cluster actually has. I’ve attached screenshot of the storage of the cluster. Any help will be much appreciated.  

1
Alona
Nutanix Employee
3 years ago
B
bbrk364Adventurer
posted in How It works

Cover changing the default passwords on the Nutanix CVM (Controller VM), hypervisor, Prism Element and IPMI.

Find the best way to change all of the administrators password on Nutanix. This what I have done: #Changing the admin acct of PE ncli user reset-password user-name=admin password='$NewPassWD$@pe' #Changing the root acct of AHV for i in `hostips`;do echo "--$i--";ssh root@$i 'echo -e "$NewPassWD$@ahv" | passwd --stdin root';done #Changing the nutanix acct of CVM echo "$NewPassWD$@cvm" | sudo passwd --stdin nutanix #Change the ADMIN acct of the IPMI for i in `hostips`; do                 ssh root@$i 'for id in `/ipmitool user list |grep 'ADMIN '|cut -d" " -f1`; do                 echo $id;                 /ipmitool user set password $id "ADMINXXXXXXX";                 done' ; done  ncc health_checks system_checks default_password_check   https://portal.nutanix.com/kb/6153

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B
3 years ago
M
marco A.Voyager
asked in How It works

Long times for disc removal

Hello, removal of the disk on a node has started automatically, and more than a day has passed and the percentage is stopped at 97%, what can I do ??

3
M
3 years ago
P
pso9968Voyager
asked in How It works

Unmount ISO CD-ROM via PC V3 API

I am struggling to get my VM to unmount the ISO via the PC v3 API.  I’m performing a GET, to get the VM Info, I’ve attempted to update the vm with data_source_reference removed, PC updates, but the iso is still attached.  I see different references with V1 on PE, but can’t seem to do it via v3.  anyone had any luck?

4
P
3 years ago
Y
YPPVoyager
asked in How It works

Nutanix cluster upgrade

In the Nutanix Cluster upgrade there are five options Upgrade Software AOS File Server Hypervisor NCC Foundation so what is the correct sequence to upgrade whole stack of nutanix software?  

3
SankarArumugam
3 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works

New KB Articles Published on Week Ending May 2, 2020

Below are new knowledge base articles published on the week of April 26-May 2, 2020. KB 8482 - Prism shows a spinning icon preventing AHV upgrades on mixed (ESXi+AHV) clusters KB 8874 - Nutanix Files - Alert - A160053 - File Server Share Backup diff path translation failed KB 9111 - LCM update is disabled since there is an emergency update available KB 9215 - NCC Health Check: dimm_hppr_check KB 9240 - ESXi Host may not enumerate all NICs due to outdated drivers KB 9289 - Licensing Conversion - LOD (Life of Device) to CBL (Capacity Based) License KB 9298 - Using tcpdump tool on AHV host KB 9301 - Windows: How to Reset Local Administrator Password KB 9310 - How to Disable the Windows 10 First Sign-in Animation KB 9323 - Upgrade or imaging of Windows 2019 might fail due to vmms registration problems Note: You may need to log in to the Support Portal to view some of these articles.

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Albert Mendoza
Nutanix Employee
3 years ago
I
Ivars StrazdinsVoyager
asked in How It works

Cannot create and attach a vdisk to VM via REST API

Hi, I am trying to attach a vdisk to a VM. So far I have found that the only way to create and attach a new vdisk to VM is via this API  POST /vms/{uuid}/disks/attach I am trying using this curl expression: curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{  "uuid": "IDEMPOTENT_UUID",  "vm_disks": [    {      "is_cdrom": false,      "is_empty": false,      "is_scsi_pass_through": false,      "is_thin_provisioned": false,      "vm_disk_create": {        "size": 1,        "storage_container_uuid": "CONTAINER_UUID"      }    }  ]}' 'https://10.10.10.10:9440/api/nutanix/v2.0/vms/VM_UUID/disks/attach' \--insecure --basic --user obfuscated_username:obfuscated_password The task fails and error is: “InvalidArgument: Invalid disk size 0”. What am I missing here? Thanks for your time, Ivars

2
aluciani
3 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

How to modify the hostname of the Controller VM?

This article describes how to rename the CVM entity in Prism within the AHV environment. This does not change the hostname of the CVM displayed in a console/SSH session as the hostname is a value configured within the CMV OS and is independent of the Controller VM name entity recorded in the Prism entity DB (Insights Data Fabric). It is the same name as in CVM’s XML definition on the AHV host. It can be checked by listing VMs on the host. The name displayed is the name that is shown in the Prism Wen console. Starting from AOS 5.10.10, 5.15 and 5.16, change_cvm_display_name script is available on CVM that can be used to change the display name.   Following is the overview of the rename procedure: Complete the pre-checks:  Name must start with NTNX- and end with -CVM. Only letters, numbers and "-" are supported in the name. CVM should be able to receive a shutdown token. Once CVM has shutdown token it will be turned off.  The script does not put the CVM or the host into mainten

0
Shaurya
Nutanix Employee
3 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works

Top KB Articles for April 2020

Below are the top knowledge base articles for the month of April 2020. KB 7604 - Disk space usage for root on Controller VM has exceeded 80% KB 4116 - Alert - A1187, A1188 - ECCErrorsLast1Day, ECCErrorsLast10Days KB 7503 - 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 KB 4409 - LCM: (LifeCycle Manager) Troubleshooting Guide KB 1113 - HDD/SSD Troubleshooting KB 8792 - NCC checks: same_hypervisor_version_check, duplicate_cvm_ip_check, same_timezone_check, esx_sioc_status_check, power_supply_check, orphan_vm_snapshot_check giving ERR KB 2090 - AHV | Host and Guest Networking KB 1523 - NCC Health Check: disk_usage_check KB 2473 - NCC Health Check: cvm_memory_usage_check KB 2486 - NCC Health Check: cvm_mtu_check KB 4519 - NCC Health Check: check_ntp KB 4541 - Alert - A101055 - MetadataDiskMountedCheck KB 3357 - NCC H

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Albert Mendoza
Nutanix Employee
3 years ago
C
CharuTrailblazer
asked in How It works

Not able to Delete Snapshot of a Deleted VM(AHV)

I have exported list of all snapshots running on AHV in our environment. On a few snapshots, VM name is empty. I suspect, this is because VM has been deleted without deleting snapshot. Now how to delete such snapshots? Below is example: Snapshot name is “removing ngt” VM-Name Snapshot-Name Creation-Time   servername Test Snapshot 3/19/2019 11:00     removing ngt 2/6/2020 1:00    

2
C
3 years ago
Drshoe28
Drshoe28Voyager
posted in How It works

VMware 6.0 to 6.7 Upgrade Process

Hey all,   At the suggestion of some people, sharing this video that I’ve created that goes through the VMware upgrade process using Nutanix 1-click functionality. Check it out if you’d like. Apologies in advance for the poor quality - it was the best way for me to hide any confidential info on screen. Cheers!

0
Drshoe28
3 years ago
HITESH0801
Nutanix Employee
HITESH0801Nutanix Employee
posted in How It works

Understanding alert node "marked to be detached" state

There may be instances where you'll receive the following alert in your environment      "Cassandra on CVM x.x.x.31 is now detached from the ring due to Node was down for a long time. Node detach procedure done by x.x.x.41."   Before understanding the alert, let's first understand what is Cassandra and the ring-structure?    Cassandra stores and manages all of the cluster metadata in a distributed ring-like manner based upon a heavily modified Apache Cassandra. The Paxos algorithm is utilized to enforce strict consistency. This service runs on every node in the cluster. The Cassandra is accessed via an interface called Medusa   To know more about Cassandra and the ring-structure, try going through Nutanix Bible which explains the architecture. .      Cassandra has a feature called auto-ring repair which helps to prevent taking the cluster down due to multiple node failures at different intervals.   The following article lists more information about the alert, auto-repair feature and ho

0
HITESH0801
Nutanix Employee
3 years ago
AntonioG
Nutanix Employee
AntonioGNutanix Employee
posted in How It works

How to Reset password for Nutanix Prism Local User

Here is a tip on how to reset the password for Nutanix Prism local user. The guide applies to Nutanix Prism Central as well. There are two ways. 1. Using Prism interface Log in to Prism Element with domain user and  go to User Management Prism user management   From the user's window choose user and click update. On the bottom of the applet there is a Reset password button.     2. Command line Log in to CVM over SSH and get into ncli command line. Follow the step by step instructions by reading Reset Web Console or nCLI Password Also if you want to know how to modify the Prism user password expire days for security reasons, you can follow this article: Modify Prism admin and console user password expire days.

0
AntonioG
Nutanix Employee
3 years ago
J
JasonStenack
asked in How It works

Get Dell iSM & PTAgent Versions with PowerShell?

I need to get the iSM and PTAgent versions from AHV clusters running on the Dell XC platform using PowerShell cmdlets. Does anyone know if this is possible? I can’t figure it out and do not think it is possible at this point.

6
J
2 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

NCC Series | secure_boot_check

Secure Boot is specifically designed to prevent a malicious boot loader attack and has been the most widely accepted approach for both Windows and Linux. Secure Boot is supported by major hardware and hypervisor vendors.    Windows introduced a new specification called Unified Extensible Firmware Interface (UEFI) that connects the computer’s firmware to its operating system (OS). UEFI is now part of an open-source forum UEFI and is expected to eventually replace BIOS.   In order for Nutanix to fully support secure boot, Nutanix binaries are now signed with keys that the hardware trusts.   The Nutanix public keys will either be available by default in the hardware or a customer would need to manually obtain Nutanix Public Keys and import them into the hardware UEFI administration interface. With Nutanix public keys made available in the hardware, UEFI will allow Nutanix binaries to boot securely.   The NCC check returns a PASS if the following is true: All Hosts is running with Secure

0
Shaurya
Nutanix Employee
3 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

What are the Nutanix compute nodes?

There are 3 types of Nutanix nodes:    An HCI Node is the most common kind of node. It is heavily equipped with all three components: processing capacity (CPU), memory (RAM), and data storage capacity. An HCI node can run any kind of supported hypervisor. A Storage Node only runs the Nutanix AHV hypervisor. These nodes have a bare minimum of processing and memory capacity however, as the name suggests, have plenty of storage onboard. A Compute Node only runs the Nutanix AHV hypervisor. Logically, these are nodes that have minimum storage onboard but are powerful compute and memory devices.   We are going to take a look at compute nodes in this post.   A compute-only (CO) node allows you to seamlessly and efficiently expand the computing capacity (CPU and memory) of your AHV cluster. The Nutanix cluster uses the resources (CPUs and memory) of a CO node exclusively for computing purposes.   CO nodes enable you to achieve more control and value from restrictive licenses such as Ora

0
Shaurya
Nutanix Employee
3 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

What are the Nutanix Storage nodes?

There are 3 types of Nutanix nodes:    An HCI Node is the most common kind of node. It is heavily equipped with all three components: processing capacity (CPU), memory (RAM), and data storage capacity. An HCI node can run any kind of supported hypervisor. A Storage Node only runs the Nutanix AHV hypervisor. These nodes have a bare minimum of processing and memory capacity however, as the name suggests, have plenty of storage onboard. A Compute Node only runs the Nutanix AHV hypervisor. Logically, these are nodes that have minimum storage onboard but are powerful compute and memory devices.   We are going to take a look at storage nodes in this post.   Storage Nodes (sometimes referred to as “Light Compute” Nodes) are nodes that only use AHV as their hypervisor. Due to their nature no user VMs should be run on these nodes. You will still see a CVM. CVMs are integral to Nutanix architecture as they process all storage input-output requests. Simply put you must have a CMV on each no

0
Shaurya
Nutanix Employee
3 years ago

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