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2980 Topics
R
Nutanix Employee
raajiNutanix Employee
posted in How It works
Conditions for single node cluster

 A single-node cluster is configured like a regular (three-node or more) cluster in many ways, but here are some of the conditions. Nutanix offers the option of a single-node cluster for ROBO implementations and other situations that require a lower cost option and accept lowered resiliency protections. Single-node clusters are supported only on a selected set of hardware models. Refer the following article for details single-node-supported-hardwares Do not exceed a maximum of 1000 IOPS Do not exceed a maximum of 5 guest VMs . To protect the guest VMs from a scenario of node failure, nutanix recommends to configure backups. These are unlike single-node replication targets which are for replication and backup purposes. LCM is supported for software updates, but not firmware updates.  There is no built-in resiliency for Prism Central on a single-node cluster. Do not create a Prism Central instance (VM) in the single node cluster. Async DR is supported for 6 hour RPO only Use

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R
Nutanix Employee
3 years ago
B
balma01Adventurer
asked in How It works
Erasure Coding post process

From the Nutanix Bible: “when a Curator full scan runs, it will find eligible extent groups which are available to become encoded. Eligible extent groups must be "write-cold" meaning they haven't been written to for awhile”.I have 2 questions:if I have some data just written in the oplog, how long takes to copy those datas in the extent store, assuming that there is not any read of it?Once the data are in the extent store, how long it takes before the erasure coding is applied to the datas? 

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Alona
Nutanix Employee
3 years ago
C
Costel-ValentinPathfinder
asked in Installation & Configuration
Dark site upgrade

Hello all,I am trying to do some updates in a dark site. I have configured the webserver and downloaded all the updates on the local server(like in the documentation). But from my understanding of the documentation, you need to do the following steps:Put the necessary files in the web server Replace the compatibility checks for the specific upgrade module Run inventory checks. Upgrade moduleI find it quite hard and time-consuming to do this for each component. Are there any better/faster ways to upgrade a dark site?For example, download all the upgrades and perform only one inventory check?

20441
Alona
Nutanix Employee
3 years ago
M
Michael HoenemannVoyager
asked in Sizer Configuration Estimator
Collector 3.1 for Hyper-V Gets Error

I want to collect informations from a single hyper-V host in a cluster.But i get an error:HTTPSConnectionPool(host='192.168.10.141', port=5986): Max retries exceeded with url: /wsman (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x000001AD0B88C808>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it'))Powershell 5.1 is installed, IP is correct. Has someone an idea?

4175
A
Nutanix Employee
3 years ago
G
GOKAdventurer
asked in Sizer Configuration Estimator
ntnxcollector_precheck.ps1 is not working with german active directory

I tried to use the precheck script on one of our Hyper-V servers.Everything works fine, but I get the error message ".... not a Domain Admin." even though my user is a domain admin. I think this might be related to the fact that the Domain Admins group is called "Domänen-Admins".Has anyone seen something like this before?

1476
A
Nutanix Employee
3 years ago
A
adnilAdventurer
asked in How It works
acli - how to update VM's custom script/user data?

Is there a command to update a vm’s custom script/user data?I tried the following and it doesn’t work:<acropolis> vm.update  my-vm cloudinit_userdata_path=file:///tmp/user-data.txt

7372
A
3 years ago
ashwin.ramaswamy
Nutanix Employee
ashwin.ramaswamyNutanix Employee
posted in How It works
Nutanix Volumes - Recommendations And Best Practices

Use the Data Services IP method for external host connectivity to VGs. For backward compatibility, you can upgrade existing environments non disruptively and continue to use MPIO for load balancing and path resiliency. For security, use at least one-way CHAP. Leave ADS enabled. (Enabled is the default setting.) Use multiple disks rather than a single large disk for an application. Consider using a minimum of one disk per Nutanix node to distribute the workload across all nodes in a cluster. Multiple disks per Nutanix node may also improve an application’s performance. For performance-intensive environments, we recommend using between four and eight disks per CVM for a given workload. Use dedicated network interfaces for iSCSI traffic in your hosts. Place hosts that use Nutanix Volumes on the same subnet as the iSCSI data services IP. Use a single subnet (broadcast domain) for iSCSI traffic. Avoid routing between the client initiators and CVM targets. Receive-side sca

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N
3 years ago
J
JasonStenack
asked in How It works
PowerShell Cmdlets Update?

Are there ANY plans to expand on the PowerShell cmdlets at all, specifically for getting host info? They’re pretty bare bones. I don’t even know the last time the cmdlets were updated/expanded. It seems to me Nutanix regrets making them and hopes they will quietly die. I have relied heavily on PowerShell to keep tabs on a very large Nutanix environment running Nutanix on both AHV and ESXi. I’m talking 700+ nodes. The ESXi clusters are no problem getting the info from because I use VMware’s PowerCLI to supplement the lack of data I can get with Nutanix Cmdlets, but the AHV clusters are another story since I don’t have PowerCLI to fall back on. Can we at least get a cmdlet that will allow us to use PowerShell to initiate ncli or acli commands, like VMware does with the “Get-EsxCLI” cmdlet. That would be very helpful.

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T
Nutanix Employee
3 years ago
Alona
Nutanix Employee
AlonaNutanix Employee
posted in How It works
Warning: Remote Host Identification Has Changed!

I’m sure you have seen that one before. In most cases you expect it or at least understand what caused it. In some instances you probably ignore it (we all do, no shame). What if this happens when you log into the CVM or the host? Has cluster security been compromised?During the upgrade or rescue of the AOS new keys are created for each node in the cluster. When you open SSH session, these keys are compared to those that were noted on the client previously and since there is a mismatch a warning is triggered.KB-2388 Upgrade/Re-install of AOS changes the ssh key for remote host identification explains how to clean up the keys to get rid of the warnings.

4880
Alona
Nutanix Employee
3 years ago
K
Kuldeep@Trailblazer
asked in Installation & Configuration
Need Document for Configuring new AHV Host and AHV Clusters

I want to configure a new AHV cluster with 10 Nodes, this would be the first time for me. I have little experience to install AHV on Bare metal, AOS, AHV installation, Network configuration etc. etc.Please share me some document so that i can able to install this. Right now i have only Nutanix Field Installation Guide.

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Alona
Nutanix Employee
3 years ago
S
Sammy777Adventurer
asked in How It works
How to remove DIMM from node

Hi Community,Version and model - NX-1065-G6I have a faulty DIMM in one node.  Memory | Uncorrectable ECC (@DIMMC1(CPU2)) | AssertedI would like to remove it from the node and restart it. i.e. Not to replace it with a new memory module.Is this possible? Risks? How should I configure the node with the missing DIMM, or is it something that Nutanix takes care of automatically? Any other advice? Recommendations?I found this document. Is this the correct one to follow?Cheers!

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S
3 years ago
Muhammed Ashraf
Muhammed Ashraf
asked in Installation & Configuration
AOS Installation failed with error

Hello All,I tried to install AOS 5.19.2 with foundation 4.6.0 and nutanix but I faced from some issues. please find the below logs for referensce 2021-03-08 11:37:42,286Z DEBUG Setting state of <ImagingStepValidation(<NodeConfig(172.21.10.65) @8170>) @8450> from PENDING to RUNNING2021-03-08 11:37:42,292Z INFO Running <ImagingStepValidation(<NodeConfig(172.21.10.65) @8170>) @8450>2021-03-08 11:37:42,296Z DEBUG Cache MISS: key(<function common_validations at 0x03A09FB0>_()_{'global_config': <foundation.config_manager.GlobalConfig object at 0x04CB1070>})2021-03-08 11:37:42,298Z INFO Validating parameters. This may take few minutes2021-03-08 11:37:42,299Z INFO Validating parameters. This may take few minutes2021-03-08 11:37:42,299Z INFO Validating parameters. This may take few minutes2021-03-08 11:39:02,743Z DEBUG Validating hyperv: C:\Program Files (x86)\Nutanix\Portable Foundation\isos\hypervisor\hyperv\SW_DVD9_Win_Server_STD_CORE_2019_1809.1_64Bit_Eng

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Sudhir9
Nutanix Employee
3 years ago
R
RamiS
asked in How It works
Splunk on Nutanix

Hi,We are planning to move to Nutanix in our organization. One of the application that is in the scope of this project is Splunk. We are a small environment and our Splunk data intake is around 30GB/day and the setup is mainly used as a SIEM.We have received a few recommendation to isolate Splunk to a separate cluster. Is this necessary, or can we have it on the same cluster if we could guarantee the availability of resources for it? The cluster will host a few application and some infrastructure component like AD and DNS.Are there any major benefits if we isolate Splunk in a different cluster?

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Sudhir9
Nutanix Employee
3 years ago
M
mandgTrailblazer
asked in Move Application Migration
vmStatsProvider errors after VM migration

After converting a VM running Windows 2012 r2 from VMware to Nutanix using Move version 3.4.1, we are receiving event IDs 257 and 259 regularly as shown below.Log Name:      ApplicationSource:        vmStatsProviderDate:          3/15/2021 8:35:34 AMEvent ID:      257Task Category: GeneralLevel:         ErrorKeywords:      ClassicUser:          N/AComputer:      ServerADescription:The "vmStatsProvider" can not be initialized. "vmGuestLib" returns error "VMware Guest API is not running in a Virtual Machine" (2). Log Name:      ApplicationSource:        vmStatsProviderDate:          3/15/2021 8:35:34 AMEvent ID:      259Task Category: Guest Library APILevel:         ErrorKeywords:      ClassicUser:          N/AComputer:      ServerADescription:Unable to start "vmGuestLibrary". Error: "VMware Guest API is not running in a Virtual Machine" (2).VMware Tools is still installed on the server however it won’t uninstall cleanly after the migration so I’ve disabled all of the ‘VMware’ services i

138251
Sudhir9
Nutanix Employee
3 years ago
N
Nutanix Employee
NutonianNutanix Employee
posted in How It works
Nutanix SRA | What I need to know

A Storage Replication Adapters (SRA) allows VMware Site Recovery Manager (SRM) to integrate with 3rd party storage array technology. Nutanix SRA is one such software module construct that allows SRM to interact with Nutanix clusters. This allows SRM to perform “Array Based Replication” using Nutanix replication, Data Protection and disaster recovery.SRM is an orchestration tool that allows us to perform recovery plans and runbook functionality.  You can set up, test and perform pre and post recovery steps in case of a failover, Set the order in which the VMs come up and decide to change IP address if needed. SRM depends on vCenter and is licensed separately. Before you start, ensure the following. SRM and vCenter versions are compatible. Please visit the VMWare website to confirm compatibility.  AOS SRA and SRM versions are compatible. Please refer to the Nutanix portal Nutanix SRA for SRM compatibility matrix to confirm compatibility. You will need 2 clusters managed by 2 vCenter

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N
Nutanix Employee
3 years ago
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
New KB Articles Published on Week Ending March 13, 2021

Below are new knowledge base articles published on the week of March 7-13, 2021.KB 9484 - Alert - A802003 - VpcRerouteRoutingPolicyInactive KB 10545 - Alert - A110457 - StaleVMPresent KB 10898 - Objects - Unable to register s3 endpoints that are self signed | Peer certificate cannot be authenticated with given CA Certificates KB 10909 - Move fails with SCSI VirtIO device driver not found if RedHat includes kernel version 2.6.32-220 or prior in /boot.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
W
wmussiPathfinder
asked in Move Application Migration
Progress Database

Today we have an Openedge Progress Database running in a VMware cluster.Is it homologated to Nutanix AHV if we migrate?

1761
AnishWalia20
Nutanix Employee
3 years ago
M
mandgTrailblazer
asked in How It works
Syslog operations

I wanted to better understand syslog events for a given AOS cluster. It appears that a single node is designated as the ‘syslog leader’ and forwards all events to the destination collector. Thus, the remaining nodes send little to no events to the collector. Is this correct?My clusters run AOS version 5.15.4 LTS for what it’s worth.

1582
M
3 years ago
maaz
Nutanix Employee
maazNutanix Employee
posted in How It works
Nutanix Insights

Nutanix Insights is a new software-as-a-service (SaaS) offering that aims to redefine the Support experience for our customers, and significantly improve the health of their clusters, by leveraging the telemetry we receive from clusters where a customer has activated Pulse. Nutanix includes a set of features known collectively as Insights that provides a predictive health and support automation platform. Insights dynamically analyzes the extent to which you are following best practices in configuring your clusters for long-term reliability, availability, and performance.Insights works as follows: Pulse collects cluster data and sends it to Nutanix customer support. The Pulse data goes to the Insights engine, a SaaS-like service in the cloud, that does deep analytical processing of the Pulse telemetry and identifies potential issues based on findings or patterns in the data. Insights employs analytics built on historical data and best practices to identify cluster configuration gaps t

10580
maaz
Nutanix Employee
3 years ago
R
Nutanix Employee
raajiNutanix Employee
posted in How It works
Acropolis Dynamic Scheduling in AHV

Acropolis Dynamic Scheduling proactively monitors the nutanix cluster for any compute and storage I/O contentions or hotspots over a period of time. If ADS detects a problem, ADS creates a migration plan that eliminates hotspots in the cluster and migrates VMs from one host to another. We can monitor VM migration tasks from the Task dashboard of the Prism Element web console Following are the advantages of ADS ADS improves the initial placement of the VMs depending on the VM configuration Nutanix volumes uses ADS for balancing sessions of the externally available iSCSI targets  By default, ADS is enabled and Nutanix recommends to keep this feature enabled. ADS monitors the following features:  VM CPU Utilization: Total CPU usage of each guest VM. Storage CPU Utilization: Storage Controller (Stargate) CPU usage per VM or iSCSI target.  ADS does not monitor memory and networking usage Lazan is the ADS service in an AHV cluster. AOS selects a Lazan manager and Lazan solver among the h

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R
Nutanix Employee
3 years ago
A
AlgonAdventurer
asked in How It works
Sequential I/O and the OPLOG versus the Extent Store

Just a few questions re sequential I/O and the OPLOG versus the Extent Store. If the I/O is deemed sequential in nature, will this always bypass the OPLOG or only when the write operation is larger then 1MB?  Does bypassing the oplog mean that the write will be a lot slower in comparison?  It still hits the SSD so my assumption is that it’s going to be the same. Why does the process of coalescing the writes before sequentially draining them help with performance? I’m interested in why this step is necessary as opposed to just writing directly to the SSD and then replicating out.

20187
Alona
Nutanix Employee
3 years ago
SteveCoops
SteveCoopsTrendsetter
asked in How It works
LCM Framework Stuck Updating

Hi,I can’t access LCM in my CE cluster. It just says “LCM Framework Update is in progress. Please check back when the update process is completed.” It’s been like this for days. Updating Foundation and NCC worked fine the old way.I can’t see any active tasks in Prism or using ecli task.listAny ideas?

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Alona
Nutanix Employee
3 years ago
B
B.Nel.
asked in How It works
Implement packet tracing on vSwitch with vTap

I am interested on visualizing east west traffic as well as egress within my NTX environment. With Open vSwitch it seems to be supported through the default vTap interface on the bridges created on my interfaces.  My question is, has anyone successfully set up a Nutanix vTap interface to capture packet flow on an external appliance and are there any negative side effects of such a design (overhead, congestion, latency… etc)?  I do have an upstream appliance that can handle the analysis similar to Gigamon, CloudLens and ExtraHop.   https://docs.openvswitch.org/en/latest/topics/tracing/

2790
B
3 years ago
H
hailAdventurer
asked in Installation & Configuration
LCM Operaion failed. Reason : The filter 'MinFoundationVersionFilter' failed

LCM - Inventory - Perform Inventory operation encountered the following error  The Foundation version is up to date.The LCM version is up to date.Only other clusters operate normally.

4154
H
3 years ago
G
gajhScout
asked in Installation & Configuration
Disk selection when installing from ISO

Hi All,I have a HP GL380p G8 and I have 1x30GB SSD 1 x 400GB SSD 2 x 600 SASWhen i start the install it asks for the location to install the hypervisor, CVM and what are data disks.  Can I use the 30GB SSD for the hypervisor and the CVM. This will leave the 400GB SSD for performance tier and the 2 x 600GB for normal tier.

7441
Alona
Nutanix Employee
3 years ago

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