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How It works

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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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1430 Topics
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending June 20, 2020

Below are new knowledge base articles published on the week of June 14-20, 2020. KB 8507 - Cosmetic high latency spikes may be observed in Prism at time of low IOPS on a cluster KB 8932 - NCC Health Check: pc_vm_resource_resize_check KB 9423 - Beam Cost Governance for Nutanix On-Prem stops reporting cost analytics post Cluster upgrade to AOS 5.15 KB 9488 - AHV | CentOS/RHEL 6.8 may hang durin the boot when tboot package is used KB 9496 - Prism Central UI showing license expired red banner even after disabling prism pro features KB 9503 - Genesis crashing on a ESXI Node | No services are up | pyVmomi issue | ParserError: 'xml document KB 9516 - Using Nutanix objects as static web server for LCM dark sites KB 9519 - Nutanix Move | How to Configure HTTP(s) Proxy on Move KB 9534 - Hyper-V: Hyper-V 2019 fails during Foundation with "InstallerVM timeout occurred, current retry 0" KB 9538 - Prism logins fail if service account AD permissions are default KB 9545 - Copier reports inc

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Albert Mendoza
Nutanix Employee
4 years ago
S
saleh saadVoyager
asked in How It works
Failed to reach a node where Genesis is up. Retrying

Hi, A customer moved his Nutanix Cluster (with Hyper-V) from a DC to another, after powering the Nodes up, the IPs of all Hyper-V host and CMs released, I logged it locally to Hyper-V hosts and configure the internal IP (192.168.5.1/28) and the external IP same like before shutting the cluster down. I repeated the previous step with CVMs, I went through cd/etc/sysconfigs/ and edit network-scripts file and added the the external IP in the eth0 and the internal one (192.168.5.2/28) in eth1. Now Hyper-V FC is working fine but cannot start VMs due to the Nutanix cluster issue, whenever I tried to start cluster from any CVM, I get this message “WARNING genesis_utils.py:1211 Failed to reach a node where Genesis is up. Retrying” Is there any way to fix this issue or to repair cluster configuration without disrupting existing data? Thanks in advance

194135
AnishWalia20
Nutanix Employee
4 years ago
SonuK
SonuKAdventurer
asked in How It works
Question regarding Erasor coding

Ques- There is 5 node cluster with 200 TB raw disk data, administrator want to enable eraser coding to obtain more space. What will we the usable space after enable eraser coding Options – 100, 125, 150, 175 TB ? Please share the calculation formula ?   Ques2 - Administrator want to perform DR test after 6 months, which snapshot he should use? Option – latest snapshot, oldest one  

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Alona
Nutanix Employee
4 years ago
J
JayakumarTrendsetter
asked in How It works
AHV networking

Is it possible for a single bridge can have multiple bonds? in which usecase it will be applicable? -Jai

22813
bbbburns
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending June 13, 2020

Below are new knowledge base articles published on the week of June 7-13, 2020. KB 9456 - Alert - A400114 - PolicyEngineServiceDown KB 9468 - Different Docker hosts can see volumes created with Nutanix DVP KB 9478 - How to clear stuck LCM inventory tasks ? KB 9480 - Windows 10, version 2004 or Windows Server, version 2004 VMs may fail to boot on AHV KB 9487 - AHV | VM update operations initiated from Prism Central may fail with "Entity CAS version mismatch" error due to missing machine_type attribute KB 9492 - Move VM IP address may change post deployment KB 9494 - Disks from ISCSI volumes change drive letters on Windows VMs after upgrade AHV 2016* to 2017* 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
4 years ago
R
roadstoneAdventurer
asked in How It works
Removal of AHV Crash dump file

Hi all, A newbie question. It seems I still have an old crash dump directory on one of my AHV hosts. A ls -lahtr /var/crash shows the single directory from back in April. At the time the issue was resolved, and the faulty DIMM that was causing the issue was replaced. That said, clearly the dump file was not removed. In terms of cleaning this up, is it OK to delete the dump directory within the /var/crash directory and then rerun the ncc health check. Or is there a better method for clearing crash dumps from Nutanix clusters. Many thanks, Rob

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R
4 years ago
SonuK
SonuKAdventurer
asked in How It works
Data rebuild when CVM is down and Oplog question

Please answer the below questions : When one cvm goes down(in a 10 node cluster with RF3) for 20 mints, then Guest VM’s new write and read IO would be served by anther's CVM and all these will be traveling across 10 g network. A : Will those new IOs served from local copy via another CVM or IOs will be served from the replica copy B: Will cluster starts to build a new replica to accommodate the missing copy or RF3   Ques 2 - When new Write IO request comes, first it will write the data on Oplog then synchronously send to other CVM’s Oplog. All host in clusters having 2 SSD and 6 HDDs. Will Write IO process by both SSD in every host or only one SSD is hsving Oplog partition active at the same time ?  I think there is only one oplog per CVM/host whether the host is aving all flash drive or 2 SSD and remaining HDD. But I am not sure about this statement, Please clarify..

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SonuK
4 years ago
L
Liam1388Voyager
asked in How It works
Recovery of data from overwritten VM?

Is it possible to recover data from an overwritten entity - does the overwritten VM or its storage still exist anywhere? I'm asking as I recovered a VM from a backup but realised in hindsight that the logs from the VM in its failed state would be useful for diagnosing the issue. Thanks in advance. 

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L
4 years ago
Neel Kotak
Nutanix Employee
Neel KotakNutanix Employee
posted in How It works
What to do when there is a DIMM failure alert?

What is the DIMM error?   A memory error is an event that leads to the logical state of one or multiple bits being read differently from how they were last written. For example, If 1 was written in a memory cell and while reading the same memory cell, it returns 0.    Memory errors can be classified into two types:   Soft errors, which randomly corrupt bits but do not leave physical damage. Soft errors are transient in nature and are not repeatable. Soft errors can be because of electrical or magnetic interference (e.g. due to cosmic rays, alpha particles, leakage, random noise).   Hard errors, which corrupt bits in a repeatable manner because of a physical/hardware defect or an environmental problem. Hard error can also occur if DIMM is not seated properly.    All memory systems in use in servers today are protected by error detection and   correction codes. These server machines employ error correcting codes (ECC), which allows the detection and correction of one or m

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Neel Kotak
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

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MontyMoreland
4 years ago
D
DanielePescialloVoyager
asked in How It works
Set Project Role through API V3

Hello, I’m working with Rest API, to “automate” some operations with Ansible, trought URI Module and Jinja2. I need to create a Project, and set permission to a specific user. How can i do this with API V3? I can add user to a Project, but i can’t set the Role.. When i check trought the Web Interface, i see the user without role. Thanks!

38584
AnishWalia20
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending June 6, 2020

Below are new knowledge base articles published on the week of May 31-June 6, 2020. KB 9442 - LCM BIOS/BMC Upgrade fails when node does not respond to IPMI power reset KB 9460 - Move: ESXi-AHV migration connection limits KB 9463 - Pre-upgrade check: Hypervisor Upgrade (test_host_upgrade_versions_compatible) KB 9467 - How to enable Karbonctl in Karbon darksite environment 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
4 years ago
Bender555
Bender555Adventurer
asked in How It works
v3 - vms/list - How to get full list of VMs?

Hello. I faced with limitation of number VMs in API reply. There is option “length” which can be added to request, but max value is 500 (I got it into experiments). We have around 1000 VMs in our environment. Is there solution?

59602
Bender555
4 years ago
S
SeanGAdventurer
asked in How It works
W2k19 Image and cloning it for sysprep - patch monthly

I have a W2k19 VM I created as a patched image. Idea is to patch it monthly. Shut it down and clone it. Then sysprep the clone and copy the disk to the Image Service. Then I can create VM’s off of it. I will repeat the colne after patching the ~master image monthly in order to keep a patched disk ready to spin up VM’s from. We are using AHV, version 5.10. Mt question is the “CLONE” a full, independant copy of the VM ? TIA -S

508511
E
4 years ago
D
davidkwasniak-68146Wayfarer
asked in How It works
Mounting Guest tools without admin account from script?

Hi community, I’m fairly new to interacting with Nutanix for automation and was hoping my VM build task would be a simple process but I’ve hit a wall with the guest tools install. I’m building a RDS environment where I need as little human interaction as I can get to make administration easier so I’m building my host VM using SCCM. I’ve multiple good reasons for approach but its mainly in support for application deployment via happening at build time. I’ve tried to install the guest tools manually but I believe they are failing due to the files being copied from a mounted ISO which has some dynamically created certificates involved so this isn’t going to work. I can see the ISO can be mounted using the API calls but every reference I’ve seen looks to need  a username/password passing in the script and I’m not overly keen in hard coding creds into script. Most of what i’ve seen is a few years old so I wondered if there has been any changes to the approach to mounting guest tools? It

15961
Alona
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
Top KB Articles for May 2020

Below are the top knowledge base articles for the month of May 2020. KB 7503 - G6, G7 platforms - DIMM Error handling and replacement policy KB 4116 - Alert - A1187, A1188 - ECCErrorsLast1Day, ECCErrorsLast10Days KB 1540 - What to do when /home partition or /home/nutanix directory is full KB 7604 - Disk space usage for root on Controller VM has exceeded 80% KB 4141 - Alert - A1046 - PowerSupplyDown KB 4409 - LCM: (LifeCycle Manager) Troubleshooting Guide KB 4158 - Alert - A1104 - PhysicalDiskBad KB 1113 - HDD/SSD Troubleshooting KB 2090 - AHV | Host and Guest Networking KB 2473 - NCC Health Check: cvm_memory_usage_check 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 4519 - NCC Health Check: check_ntp KB 2486 - NCC Health Check: cvm_mtu_check KB 4273 - NCC Health Check: aged_third_party_backup_snapshot_check KB 3357 - NCC Health Check: ipmi_

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Albert Mendoza
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending May 30, 2020

Below are new knowledge base articles published on the week of May 24-30, 2020. KB 9390 - Alert - A130338 - ServiceBadScore KB 9431 - LCM operation on ESXi hosts fails with "LAG is configured with X uplinks however there are Y NICs added in the teaming policy" 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
4 years ago
Shaurya
Nutanix Employee
ShauryaNutanix Employee
posted in How It works
RF2 -> RF3 | Requirements

Giving thought to change your replication factor from 2 to 3? What are the impacts and things to consider?   First, let’s take a look at what replication factor is. Redundancy factor is a configurable option that allows a Nutanix cluster to withstand the failure of nodes or drives in different blocks.   By default, Nutanix clusters have redundancy factor 2, which means they can tolerate the failure of a single node or drive.  So RF3 means cluster can tolerate the failure of 2 nodes or drive… Basic Maths isn’t it?   Redundancy factor 3 has the following requirements: Redundancy factor 3 can be enabled at the time of cluster creation or after creation too. A cluster must have at least five nodes for redundancy factor 3 to be enabled. For guest VMs to tolerate the simultaneous failure of two nodes or drives in different blocks, the data must be stored on containers with replication factor 3. Controller VMs must be configured with a minimum of 28 GB(20 GB default+8 GB for the featur

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JP_CSSR
Nutanix Employee
4 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending May 23, 2020

Below are new knowledge base articles published on the week of May 17-23, 2020. KB 4781 - A Windows 7 or Windows 10 User VM Fails to Power On with an NVIDIA vGPU Profile in ESXi 6.5b KB 9218 - Prism Element alternative UPN login fails KB 9357 - Oops - Server error when updating Container settings in Prism KB 9373 - AHV | 10Gbps NIC shows as 1Gbps despite auto negotiation enabled on Intel X550 NIC cards KB 9394 - Objects - Deployment might fail with Asymmetric routing / Policy Based routing configured in environment | Deployed cluster greyed out | IAM service is not healthy KB 9400 - AHV | Troubleshooting Virtual Machine boot failures KB 9403 - LEAP - Entity Sync tasks generated continously after PC upgrade to 5.16.1 KB 9407 - [Objects] Objects 2.1 Darksite Deployment failing at deploying metadata store KB 9420 - /tmp filled up by /tmp/paramiko_logs file KB 9422 - Error updating the current checks parameter. Health check schedule interval is invalid. KB 9425 - Official Guidan

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Albert Mendoza
Nutanix Employee
4 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
4 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. 

26913
Alona
Nutanix Employee
4 years ago
Jubran
Nutanix Employee
JubranNutanix Employee
posted in How It works
Aged third-party backup snapshots present

What are the 3rd party snapshots? Third-Party snapshots are generated by a third-party backup tool over API calls to our storage. The Nutanix system does not manage this type of snapshots and will keep the snapshots until it receives a deletion instruction from the third-party tool.   The NCC health check aged_third_party_backup_snapshot_check checks the cluster for dangling third-party backup snapshots that may be present for a protection domain. If a third-party backup snapshot has existed in the system for longer than the specified period, this check will raise an alert. These backup snapshots are snapshots that are generated from 3rd party backups (Veeam, Commvault, Rubrik, HYCU, etc.).    The check passes if third-party backup snapshots are not present in the cluster longer than the configured threshold. The default threshold is 7 days, but this threshold value can be modified. The threshold can range from 1 day to 365 days. For more information, examples and solution check out K

56482
C
4 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

48379
M
4 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 ??

28154
M
4 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
4 years ago

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