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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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...
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Albert Mendoza
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Albert Mendoza
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Top KB Articles for February 2024

Below are the top knowledge base articles for the month of February 2024.KB 6082 - inode_usage_check fails due to large amount of email file...
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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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1354 Topics

M
Marvin MitschulatScout
asked in How It works

Report for dedicated VM usage in cluster

Hello community, Maybe one of you can assist me for a report of cluster usage. I need a report which gives me the usage of all VMs in a cluster. But I need this information for every VM separated. In the analysis page I can only create a chart for on VM and with over 600 VM this take a long time... I need for a time span of the last 3 month the following information of the VMs IOPS (min,max, avg) RAM (min,max,avg) CPU (min,max,avg) Is it possible with the analysis page or with an cli command ?

2
Alona
Nutanix Employee
3 years ago
T
TarishahPathfinder
asked in How It works

Memory slots

I am trying to locate the memory slots “P2-DIMMD1” and “P2-DIMMD2”  in G4 but did not see any slot marked as P2-DIMMD1 or P2-DIMMD2. would you please let me know how to find these slots and replace memory. Thanks, Tairshah

5
JeremyJ
Nutanix Employee
3 years ago
M
Maxim GrishinTrailblazer
asked in How It works

Nutanix Cluster API v2 reports normal status when a node is "down"

Yesterday our Nutanix CE cluster suffered a node loss (onboard NIC went offline somehow, investigating), HA failover performed correctly, but I had Zabbix monitoring cluster API 2.0 which did not state there is a problem. The only difference was that the host stopped being visible in the discovery by its proper name and remained only by IP, every other reading were "normal" and "not degraded" and even cluster state was reported "normal" during host effective downtime. WTF?! Also, WTF is with re-posting a question to another forums when asked to? Do you maybe have crosslinks allowed to ask the same question in a different subset of forums?

8
M
5 years ago
srananavre
srananavreWayfarer
asked in How It works

Cannot create UUID from string. New-NTNXVirtualMachine

I'm trying to create a vm from our CentOS75 gold image. Pallavi Akella from Nutanix created the CentOS gold image using Disk and not an ISO. When I provision vms using powershell script. [list=1] [*]update the Clone.csv where I enter the following info name,VlanID,VMRam,Vcpu,cores,VMIP,clone,Image [/list]name,VlanID,8,2,2,VMIP,CentOS75, and save the file. [list=1] [*]Next I run cloneNTNX.ps1 script to provision the vm. This script also runs connect-Nutainx.ps1 and Create-NTNXVM.ps1 script. When I run the cloneNTNX.ps1 script I get below error. [/list]PS C:\Users\srananavre-a> cd C:\_Mis\NTNX\scripts PS C:\_Mis\NTNX\scripts> .\cloneNTNX.ps1 Not connected to any server. Please connect to a server and try again. Nutanix Cluster: Username for : Password for [Warning]: Cluster version[5.10.1.1] and Cmdlets version[5.5] do not match. This might cause some cmdlets to not functin correctly. Do you still want to continue [Y/N]?: y Connected to Checking if VM already exists

2
JeremyJ
Nutanix Employee
4 years ago
C
ChristopherRAdventurer
asked in How It works

Mount-NTNXGuestTool

Hi Does anyone know how to use this Powershell cmdlet properly mount-ntnxguesttoll -vmid 54312c2a-2b7e-4dbe-b7ac-0fa58b575ad2 nor mount-ntnxguesttool -vmid 00054abc-11c2-77b7-2a9b-246e963f27a8::54312c2a-2b7e-4dbe-b7ac-0fa58b575ad2 work Trying to pipe to the mount-ntnxguesttool doesn’t help either. Help!!! Christopher

2
C
4 years ago
Jubran
Nutanix Employee
JubranNutanix Employee
posted in How It works

High CPU on a CVM - Isolating and troubleshooting

Let's say that you are monitoring your cluster's performance or you received alerts regarding high CPU on a CVM.  Why high CPU utilisation on a CVM is a critical alert?  The CVMs are one of the most important components in a Nutanix cluster. It is crucial that CVMs are healthy and perform their tasks properly as they run Nutanix software and serve all of the I/O operations to the hypervisor and all VMs running on that host. To understand the reason behind the high utilization, begin by identifying patterns of the performance:  Is the high CPU constant or periodic?  How long has the high CPU been occurring?  Is there a similar behaviour on other CVMs?  Certain patterns may point towards a cause. For example, a periodic spike may be attributed to antivirus, backup or a similar scheduled task being run in the background. To view the live CPU utilization run top on a CVM. For historical "top" info, review the top logs based on each CVM under/home/nutanix/data/logs/sysstats/top.INFO

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Jubran
Nutanix Employee
4 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

Single or Two node cluster | Possible?

Whenever we hear the word cluster, the picture that comes in our mind is multiple nodes. So doesn’t a single or two-node cluster sound weird?   But, it’s possible!   Well… In a traditional Nutanix cluster at least 3 nodes are expected to form a cluster. There is an option however to form a single-node or a two-nodes cluster for ROBO (Remote Office/Branch Office) implementations or as a backup site.   Confused or have questions regarding the implementation or requirements/dependencies? Check out Guide for single-node and two-node clusters for any clarifications.   To know more on single-node clusters:  Data Protection and Recovery with Prism Element: Single-Node Replication Target Clusters Prism Web Console Guide: Single-Node Clusters   For more information on two-nodes cluster: Prism Web Console Guide v5.16: Two-Node Clusters

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Shaurya
Nutanix Employee
4 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
3 years ago
M
MrMikeTrailblazer
asked in How It works

Looking for get-ntnxvm -SearchAttributeList syntax

Looking for get-ntnxvm -SearchAttributeList syntax. Since the get-help doesn’t provide any information besides:  “Search attribute list, only searches on few attributes. For accurate search, provide field names” Can someone provide an example of how to use this parameter? Most examples seem to use -searchstring.  I would like to search for vmname.  I know I can use a where clause and filter that way but curious if -SearchAttributeList could also do it.

2
maaz
Nutanix Employee
3 years ago
frsbeckum
frsbeckumTrailblazer
asked in How It works

3node Cluster - 1 CVM is buggy - How to fix that?

2 of 3 nodes are fine and working. The 3nd CVM is up and i could ping it. Restart the Cluster with “allssh genesis stop cluster_health; cluster start” does not start these Cluster Partner. After Login in Prism i saw a “Disk degraded” for these 3rd node and now these disk is missing.    How to fix node Nr. 3 in a 3 Node Cluster?    

5
frsbeckum
4 years ago
B
blw1992Voyager
asked in How It works

Does Nutanix 5.15（LTS）support ESXi 7.0？

The new ESXi 7.0  has been released, does the latest version of nutanix 5.15 (LTS) support upgrades?

2
B
4 years ago
JeremyJ
Nutanix Employee
JeremyJNutanix Employee
posted in How It works

Scheduled power outage? Relocating cluster hardware? If you need to shut down all the nodes in your AHV cluster, here's how.

For most maintenance tasks and upgrades we can keep the cluster up and VMs running, but in some cases the whole cluster will need to be shut down. If you just need to power off a single node, a cluster of three or more nodes won’t need to stop.  To stop a single-node cluster please see the section “Shutting Down a Single-node Cluster” in the NX and SX series hardware administration guide. To stop a single node in a larger cluster see the section “Shutting Down a Node in a Cluster (AHV)”  If there's going to be a site power outage, a full network outage, or physical relocation of the whole cluster you're going to want to gracefully shut down the whole cluster. The full procedure is covered in the article Shutting Down an AHV Cluster for Maintenance or Relocation.   In summary the procedure will be as follows: Update NCC and perform a health check, then address any items of concern. Shut down all the user VMs. Stop any Nutanix Files cluster, if applicable. At this point no VMs other than

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JeremyJ
Nutanix Employee
4 years ago
M
Muhammad Usman Ayub
asked in How It works

Network connectivity failure scenario

Hi folks, I want to ask about the details regarding the network connectvity failure and cluster behaviour in such cases. I am mentioning two such scenarios but other scenarios may also be possible. Scenario 1. If one host in the cluster gets completely disconnected from other nodes at network level but host is up and running what will be the cluster behavior and what will happen to the vms running on that particuar host Scenario 2. If all hosts in the cluster get disconnected from each other at network level but hosts and cvms are up and running, what will happen to the vms running on each host.

1
E
5 years ago
M
Manuel80Explorer
asked in How It works

Mixed Hypervisor in same cluster ?

Hello, with latest AOS (5.10 or newer) it's possible to run multiple hypervisor in same cluster ? For example one cluster with 5 nodes with esxi and 3 nodes with AHV ? Thanks Manuel

1
RichardsonPorto
Nutanix Employee
5 years ago
Alona
Nutanix Employee
AlonaNutanix Employee
posted in How It works

Pulse - what's in it for you? Much more than a simple call home.

 Nutanix Pulse HD provides diagnostic system data to Nutanix support teams to deliver pro-active, context-aware support for Nutanix solutions. The Nutanix cluster automatically and unobtrusively collects this information with no effect on system performance. Pulse HD shares only basic system-level information necessary for monitoring the health and status of a Nutanix cluster.   OK, this is all great but let’s get to real benefits, shall we? Q 1. Why would you enable it? A. Well, for several reasons: So that if you have an issue that you raise with Nutanix support we would be able to start looking at the data about your cluster immediately without making you answer many questions that are often crucially important for a prompt issue resolution. In essence, to reduce the amount of time it takes to fix the problem. So that when Nutanix engineer requires logs they would be able to collect them themselves while you would focus on what you need to do. No frustration with logs collection,

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Alona
Nutanix Employee
4 years ago
T
theGmanTrailblazer
asked in How It works

Pulse: PE or PC?

Our CVMs are locked down tight, I have no intention of allowing any internet access to PE, all support actions must be done through a webex session where our admin grants control to the support tech. but I have PC set up for NAT so it can communicate outside our private network. my question is, will pulse work strictly through PC or does PE need to be set up for it? Everything i see documented is about PE talking to insights.nutanix.com.

5
T
4 years ago
AarthiKam
Nutanix Employee
AarthiKamNutanix Employee
posted in How It works

Nutanix SCMA Implementation

The Nutanix platform and all products leverage the Security Configuration Management Automation (SCMA) framework to ensure that services are constantly inspected for variance to the security policy. Nutanix has implemented security configuration management automation (SCMA) to check multiple security entities for both Nutanix storage and AHV.  It continuously assesses and heals Nutanix clusters to ensure that it meets or exceeds all regulatory requirements. In this process over 1,700 security entities are analyzed and self-corrected across storage and hypervisor (AHV only) layers. Nutanix automatically reports log inconsistencies and reverts them to the baseline.With SCMA, you can schedule the Security Technical Implementation Guides (STIG) to run hourly, daily, weekly, or monthly. STIG has the lowest system priority within the virtual storage controller, ensuring that security checks do not interfere with platform performance.To learn more about this feature, click here.

0
AarthiKam
Nutanix Employee
3 years ago
pjoy
pjoyAdventurer
asked in How It works

can we replace an existing node with a better hardware,

can we replace an existing node with a better hardware,  that is with the latest processor?

2
V
Nutanix Employee
4 years ago
M
MarekSWIVoyager
asked in How It works

How to get VM/Host/Cluster/etc. statistics from API in bulk?

Hi, is there a way how to get VM/Host/Cluster/etc. statistics from API in bulk? We know about the /stats endpoints, but those only allow to get stats for single entity, so in case there are hundreds of VMs in cluster that would mean hundreds of separate requests to API. We don't really want to put lot of strain on the cluster just by polling stats. Our default polling interval is several minutes, so using projection=stats doesn't really work for us (as I believe it provides current value) and we'd need to know the stats for the time interval between our polls. Thanks so much for your time. Best regards,Marek

4
HITESH0801
Nutanix Employee
4 years ago
C
cirventAdventurer
asked in How It works

v3 - Error 403 api/nutanix/v3/vms/list

Hello All, I can not list the VMs with the v3 version, I have the same error with the API explorer, I have an error 403, my cluster is in version 5.5.3.1 can you help me? Code: [code]$username = 'admin'; $password = "pass"; $url2 = "https://a01ntnx003:9440/api/nutanix/v3/vms/list"; $data_string2 = '{\"kind\":\"vm\"}'; $ch2 = curl_init($url2); curl_setopt($ch2, CURLOPT_CUSTOMREQUEST, "POST"); curl_setopt($ch2, CURLOPT_POSTFIELDS, $data_string2); curl_setopt($ch2, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); curl_setopt($ch2, CURLOPT_USERPWD, "$username:$password"); curl_setopt($ch2, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch2, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch2, CURLOPT_SSL_VERIFYHOST, false); $data3 = curl_exec($ch2); [/code] Error: [code]{ "state": "ERROR", "code": 403, "message_list": [ { "message": "Requested action is not supported.", "reason": "ACTION_NOT_SUPPORTED" } ], "api_version": "3.0" } [/code]

4
mgrubb
4 years ago
N
NandaAdventurer
asked in How It works

Boot Priority

While creating the VM, is there a way to change the boot sequence? If no, how does Nutanix boot up the loaded image iso?

2
RichardsonPorto
Nutanix Employee
4 years ago
ashwin.ramaswamy
Nutanix Employee
ashwin.ramaswamyNutanix Employee
posted in How It works

Manual Firmware Updates

Nutanix recommends that you use the Prism Life Cycle Manager to perform firmware updates. However, firmware must be updated manually if: The component is located in a single-node cluster, OR The component is located in a multi-node cluster, but the hypervisor the cluster is running does not support LCM firmware updates. Shutting Down a Node in a Single-Node Cluster Shutting Down a Node in a Multinode Cluster Manually Updating M.2 RAID Hypervisor Boot Drive FirmwareManually update the firmware on HW RAID M.2 boot drives on -G7 or newer platforms in cases when LCM cannot be used. Manually Updating Data Drive FirmwareManually update the firmware for a SAS or SATA data drive or update the hypervisor boot drive firmware on any -G6 platform M.2 drive (non-RAID). Manually Updating SATA DOM FirmwareUpdate firmware for a SATA DOM. Manually Updating the BMC and BIOSManually update BMC and BIOS versions. Manually Updating HBA Controller FirmwareUpdate the firmware for an HBA card.

0
ashwin.ramaswamy
Nutanix Employee
3 years ago
Jubran
Nutanix Employee
JubranNutanix Employee
posted in How It works

Re-claiming a cluster license

Let's say you have modified the license assignments, removed a node from the cluster and you got an alert in Prism stating that there is no current license for the cluster.  You can reclaim and optionally re-apply licenses for nodes in your clusters. This procedure describes how to reclaim licenses where the cluster is not configured with Portal Connection or the cluster is not connected to the internet (also known as dark-site clusters). After you remove a node, you can also move the node to another cluster. More info. You must un-license your cluster when you plan to destroy a cluster. More info Return licenses to your inventory when you remove one or more nodes from a cluster. You can reclaim licenses for nodes in your clusters in cases where you want to make modifications or downgrade licenses. More info You do not need to reclaim Starter licenses for Nutanix NX Series platforms. These licenses are automatically applied whenever you create a cluster. For more information about rec

0
Jubran
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works

Top KB Articles for September 2019

Below are the top knowledge base articles for the month of September 2019. [list] [*][url=portal.nutanix.com/kb/4141]KB 4141[/url] - Alert - PowerSupplyDown [*][url=portal.nutanix.com/kb/1540]KB 1540[/url] - What to do when /home partition or /home/nutanix directory is full [*][url=portal.nutanix.com/kb/4519]KB 4519[/url] - NCC Health Check: check_ntp [*][url=portal.nutanix.com/kb/4409]KB 4409[/url] - LCM: (LifeCycle Manager) Troubleshooting Guide [*][url=portal.nutanix.com/kb/4188]KB 4188[/url] - Alert - IPMIError [*][url=portal.nutanix.com/kb/2090]KB 2090[/url] - AHV | Host and Guest Networking [*][url=portal.nutanix.com/kb/4158]KB 4158[/url] - Alert - PhysicalDiskBad [*][url=portal.nutanix.com/kb/3523]KB 3523[/url] - How to create a Phoenix ISO or AHV ISO from a CVM or Foundation VM [*][url=portal.nutanix.com/kb/7077]KB 7077[/url] - Alert - CassandraSSTableHealth [*][url=portal.nutanix.com/kb/2608]KB 2608[/url] - Cluster Health Checks Incorrectly Show Warnings and Failures [*][url=p

0
Albert Mendoza
Nutanix Employee
4 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works

NTP | AHV vs ESXi

First, let us understand what NTP (Network time protocol) is. An NTP server is a time server that is used to keep/sync the time in your cluster. An NTP server can be public or private depending on the strictness of your environment.   To know how to configure NTP in your Nutanix cluster, take a look at- https://support-portal.nutanix.com/#/page/docs/details?targetId=Web-Console-Guide-Prism-v5_16:wc-system-ntp-servers-wc-t.html   After the NTP server is configured, the genesis leader becomes the NTP leader, which means that the genesis leader is syncing time to the NTP server and other CVMs are syncing time with the genesis leader.   How NTP works in AHV:- It’s as simple as it gets. The AHV hypervisor takes the same server configured on the cluster and syncs the time with it individually. There are no extra steps required to configure the NTP server on the AHV hosts.   How NTP works in ESXi:- The ESXi cluster does not take the server configured on the Nutanix cluster and it needs to be

2
MontyMoreland
3 years ago

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