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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

started this topic

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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Riddhima.singhNutanix Employee

posted in How It works

Handling AWS Health Notifications

Nutanix Clusters Console receives the results of the status checks performed by AWS to see the status of the instances.Status checks on AWS are performed every minute, returning a pass or a fail status. If all checks pass, the overall status of the instance is OK. If one or more checks fail, the overall status is impaired. There are two types of status checks, system status checks, and instance status checks. System status checks monitor the AWS systems on which instance runs. Instance status checks monitor the software and network configuration of individual instances.If Nutanix Orchestrator detects that AWS has marked system status or instance status of an instance impaired, following WARNING message will be seen in the Notification Center of the Nutanix Clusters Console: More information on - http://portal.nutanix.com/9704 What does Nutanix Cluster On AWS mean :- Nutanix Clusters provides a single platform that can span private and public clouds but operates as a single c

3 years ago

Albert MendozaNutanix Employee

posted in How It works

New KB Articles Published on Week Ending October 3, 2020

Below are new knowledge base articles published on the week of September 27-October 3, 2020.KB 8607 - NCC Health Check: inconsistent_file_groups_check KB 9072 - NCC Health Check: file_server_task_stuck_check KB 9491 - NCC Health Check: container_on_removed_storage_pool KB 9728 - NCC Health Check: nearsync_stale_staging_area_check KB 9902 - NCC Health Check: vm_updates_disabled_check KB 10050 - Prism Central throwing "ErrorCode: 4" on VM update operations KB 10067 - Karbon - Private Registry Addition Troubleshooting KB 10071 - Move - Service start timed out error on Hyper-V KB 10077 - Alert ID 130096 - Failed to Recover NGT Information for VM KB 10079 - Alert ID 130095 - Failed To Recover NGT Information KB 10081 - Alert - A21014 - CassandraWaitingForDiskReplacement KB 10091 - Ubuntu 20.04 Server installation failes in guest VM running on AHVNote: You may need to log in to the Support Portal to view some of these articles.

3 years ago

frsbeckumTrailblazer

posted in How It works

MONITORING Part 2/4 CheckMK / Dynamic Inventory

The dynamic Inventory of a Hosts and the creation of Service Checks is one of the benefits of the checkmk opensource tool CheckMK. This Tool could be installed as a single Installation but it is also part OMD or Openitcockpit, which are using checkmk as an extension In my Homelab i will give a short overview of the use of checkmk with Openitcockpit with a nutanix 3 node cluser.Requirements: Enable SNMP in Prsim Centrala) Port 161/UDPb) Ein Username und Kennwörter fuer SHA und AESIf the Requirements are finished just create a new Host in Openitcockpit with Default Values. Ping is the standard Check first then. AFTER the Creation and Export of the Config we chood CHECKMK_DiscoveryWe choose SNMP V3 as Discovery Method and type in the Credentials which we prepared a step above in Prism Central.The FIRST Discovery tooks some time! If no result is shown, the credentials may we wrong or MD5 is set instead of SHA in the Auth section! If its working we get a bunch of discoverd services now:We g

3 years ago

frsbeckumTrailblazer

posted in How It works

MONITORING Part 4/4 The Windows way with Paessler PRTG

In the first 3 Sections we saw solutions with classical snmp monitoring, dynamic monitoring with checkmk and metrics with prometheus and grafana.No we try the windows way. A Windows Application from the german vendor “Paessler” which could be tried for free for 100 sensors (not Nodes or VMs!).We download the Package here and install.After successfull Installation we get a Browser Page on Port :8080 and a LoginPrompt with default prtgadmin / prtgadmin.We login and create a new Host over the Menue Geräte/Geräte hinzufügen for our Nutanix Cluster:Zum Einsortieren hab ich hier “Virtuelle Systeme” gewählt und keinen eigenen neuen Knoten angelegtType in Name and IP from our Cluster (Nutanix Cluster IP) ATTENTION: Scroll DOWN and type in the Values from your SNMP Secrets!: After Click on OK the Host is created and a basic check is made via PING.. The System tries an autodisovery now but this is not needed for a nutanix cluster here! We klick on NOT “Automatic Discovery” (takes very long ag

3 years ago

maazNutanix Employee

posted in How It works

How to verify and keep record of replacement performed on node

To verify if we have replaced DIMM on correct slot and CPU we can use the following method We can look at hardware.history file which records any replacement for example DIMM,SSD,HDD,NIC being made to that node. This file remains local to each CVM After we replace DIMM we will boot the host up Power on CVM and run following command ncc hardware_info update_hardware_info This will update the hardware.history file present in ~/config directory and it will recognize any new replacement Open hardware.history using less less ~/config/hardware.history Go to last line by pressing shift+g Check out the most recent replacement it should look something like this Mon, 05 Oct 2020 15:37:01 CDT|Component changed: Memory module{locator:P1-DIMMC1} Old values: |{serial_number: 423D07AF}|(Last Detected Mon, 05 Oct 2020 10:13:25 CDT) New values: |{serial_number: 152057A5} It mentions DIMM P1-DIMMC1 was replaced and its serial number is changed from 423D07AF to 152057A5 This is a quick and

3 years ago

AarthiKamNutanix Employee

posted in How It works

Name it right!

If you have a storage container on the cluster and the name starts with a “#”, you may see this error while trying to upload an image:"Could not access the URL nfs://127.0.0.1/%23ISO_Images/.acropolis/image/106ac31b-6236-4534-a2ae-808c08bb912f: Failed to parse the file size" That happens because the URL cannot have the # in the name and it gets automatically replaced with %23. Therefore, this creates the inconsistency between the container name and the URL.To resolve the issue, rename the container and remove the # from the container name and retry the image upload.Take a look at KB-10117 for more information.Check this guide on storage containers.

3 years ago

AlonaNutanix Employee

posted in How It works

Everything you wanted to know about Nutanix Era 2.0

Are you new to Era and want to learn more about it? Are you an experienced engineer working with the product looking for answers?Era is a database as a service (DBaaS) that automates and simplifies database administration, bringing one-click simplicity and invisible operations to database provisioning and life-cycle management. Nutanix has an article with over 50 questions answered about Nutanix Era 2.0. The article covers questions on the variety of topics, such as:Time Machines Profiles Provisioning and Cloning Across Multiple CLusters SAP HANA on Era Copy Data Management for Multiple Databases SQL Server Patching SQL Server Database Group PostgreSQL Patching Oracle Restore PostgreSQL RestoreSome of the questions answered are:Can a single Era management plane handle multiple Nutanix clusters?What type of networks are supported for Era Agents?Can two or more pre-2.0 Era instances be converged into one?What version of Oracle is supported for Oracle Restore?Can we clone a few databases

3 years ago

ashwin.ramaswamyNutanix Employee

posted in How It works

VM to VM Networking Troubleshooting in AHV

Synopsis: The goal of this workflow is to walk-through troubleshooting VM to VM communication issues in a Nutanix Cluster. Most customers are very vague when they state they have a networking issue. We will go through painting a complete picture of the network topology by asking the right questions and running commands on the Hypervisors. Initial Triage:Questions to Ask: What hypervisor is running on the cluster? What guestOS is running on the VMs? Are the VMs on the same node or different nodes? Are the VMs configured to use the same VLAN? What method is the customer using to test connectivity? Is there any Firewalls or ACLs that would stop this VM traffic? Information to gather: NIC teaming/bond configuration on node. Switch vendor and model from upstream switch. Interface configurations for the interfaces connecting to the nodes. If ESXi is the customer running on a Standard vSwitch or Distributed vSwitch? VLAN information for each VM. IP and Subnet Mas

3 years ago

GaretNutanix Employee

posted in How It works

Exporting Flow Security Policies

Do you already have many security policies defined within one instance of Flow and, have another instance where you need the same set of policies but do not wish to recreate them? Or, do you wish to simply have a backup of your existing security policies just in case you should ever need to restore them sometime in the future?Flow has the native ability to export (and subsequently import) security policies that have already been defined previously. Policies are exported into a single binary file, which can then be transferred to a different instance of Flow or stored-away for backup purposes.Please also note that, when importing a previously exported binary file, any existing policies which are already defined within a given Flow instance are automatically removed in-favor of the newly imported policies.You can find more information regarding this within the Exporting and Importing Security Policies section of the Flow Microsegmentation Guide.

3 years ago

Riddhima.singhNutanix Employee

posted in How It works

How to Migrate Linux VMs to AHV

Note - Nutanix highly recommends using Nutanix Move to migrate VMs to AHV. See the Nutanix Move documentation at the Nutanix Support portal. This KB should only be used if Nutanix Move cannot be used or for reference only. For large scale migrations of business critical systems, Nutanix Global Services organization provides resources to assist with streamlining migration scenarios. For information on available services, see: http://www.nutanix.com/services/consulting-services/.The following high-level steps are required when migrating Linux VMs from another hypervisor to AHV. Determining what VirtIO drivers are available in the Guest OS kernel and deciding which BUS ((IDE, SCSI, etc.) type to use when creating AHV disks for the VM. Determining what VirtIO drivers are built into the Guest OS initial boot image (initrd or initramfs) to allow booting the VM in AHV. Rebuilding the GuestOS initrd or initramfs with VirtIO drivers (If needed). Updating Guest OS boot configuration files

3 years ago

Albert MendozaNutanix Employee

posted in How It works

New KB Articles Published on Week Ending October 10, 2020

Below are new knowledge base articles published on the week of October 4-10, 2020.KB 9646 - Pre-check: test_is_nos_upgrade_supported_on_esx KB 9782 - LCM pre-check : is_cvm_in_maintenance_mode KB 9876 - 1-click Hypervisor Upgrade from ESXi 6.x to ESXi 7.0 fails with "Upgrade bundle is not compatible with current VIBs installed" on Dell platforms KB 9879 - LCM Pre-check: test_nx_ipmi_health_check KB 9892 - NCC check marvell_boss_card_status_check fails on ESXi 7.0 on Dell platforms. KB 10018 - VirtIO 1.1.6 installation on Windows 7, Windows Server 2008 R2 KB 10068 - Era 2.0 FAQs KB 10070 - Calm: VM image upload fails with error "Unexpected error: the following NVRAM files cannot be imported: calm-vm-pc-x.x.x-calm-x.1-file1.nvram." KB 10073 - LCM 2.3.4 NIC Firmware Upgrade limitations KB 10094 - Move - Ability to NOT Retain static IP and set it to DHCP on destination cluster KB 10097 - Cassandra Crashing with: "None of the SVM's IPs on interfaces match the service vm external IPs in Zeus

3 years ago

rohan.saksena-55595Nutanix Employee

posted in How It works

How to Troubleshoot Remote Support Tunnel Error

In some scenarios, when you enable the remote support tunnel, it’ll tell you that it has been temporarily enabled but the status will show “disabled”.To troubleshoot, you can start by checking Basic IP connectivity to nsc01.nutanix.net or nsc02.nutanix.net. If that times out, then it is either a DNS resolution problem or a firewall issue.Check the firewall rules of your system to allow outbound connections to nsc.nutanix.com on port 80 or 8443.For more details on troubleshooting, check KB-1044

3 years ago

ashwin.ramaswamyNutanix Employee

posted in How It works

Customers can observe cluster issues when they use more than 90 percent of the total available storage on the cluster. This article provides general guidelines on the maximum storage utilization on a cluster. The total available storage capacity on a Nutanix cluster is the sum of all the available storage space across the nodes.Customers should not try to use all the available space in the cluster. Sufficient space should always be available in the cluster in case a failure occurs. For example, when a disk fails in the cluster, the extent groups that were present on that disk have to be copied to other disks to ensure that all the data is at the configured replication factor. If the disk space is unavailable for this activity, then there is a risk of data loss if more failures occur with the data in an under-replicated state. The formula for calculating the maximum recommended usage for clusters is one of the following. Recommended maximum utilization of a cluster with containers using

3 years ago

AlonaNutanix Employee

posted in How It works

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 contacts the person who is assigned as Support Contact for the asset. You can spread the load within your team, assign the contact based on the time zone the asset is within or use any other method you like. The choice is yours!Help us to choose the right person to work with, shorten the resolution time and avoid the avoidable – configure Support Contact for your Nutanix clusters.Log in to my.nutanix.com. Click Support Portal. Under Products, click Installed Base. Click Assets tab. Select all assets by clicking on the checkbox located at the top left of the table. Click Edit Assets. Update the details and click on the green tick box located at the bottom right of the dialogue box. Click Clusters tab. Select all clusters by clicking on the checkbox located at the top left of the table. Click Edit Clusters. Update the details and click on the green tick

3 years ago

maazNutanix Employee

posted in How It works

Identifying xi leap vs leap

It's very simple to identify Xi leap from leapFrom the CLI of the PC, run the command "nuclei availability_zone.list" to list the Availability Zones connected to the local AZFor Xi leap availability zone name shows name as US-WEST-1Bnutanix@cvm$ nuclei availability_zone.list "Total Entities : 2""Length : 2""Offset : 0""Entities :"Name UUID State Local AZ e007dd9a-1910-4a82-a4a5-9a9c7110d0f5 COMPLETE US-WEST-1B cce71719-d160-47b0-874a-171a61f8e6ee COMPLETE For leap it should start something likePC_xxx.xx.xx.xxXi leap can be found in PC by clicking on gear icon-->Xi cloud serviceFor details please refer leap administration guideleap guide

3 years ago

GaretNutanix Employee

posted in How It works

Nutanix Collector and Hyper-V

As of Nutanix Collector release version 3.0 and later, it is now possible to collect statistics for Hyper-V clusters along with AHV and ESX clusters.From the initial home screen, simply select the “Hyper-V” option from the “Run on” drop-down, then enter the IP address or fully-qualified domain name (FQDN) of a Hyper-V host, followed by the username and password of an Windows administrator from the administrator group. Thereafter, simply select the entities from which you would like to collect statistics and click the “Collect” button.Please note that any Hyper-V hosts being connected to should be running PowerShell version 5 or later. Also, as Collector currently only collects configuration data from Hyper-V clusters, the Collector performance graphs may appear as blank following a successful collection.You can find more information regarding Nutanix Collector from the Nutanix Collector User Guide.

3 years ago

AarthiKamNutanix Employee

posted in How It works

Alert ID - A130100 - iSCSI Configuration Failed

This article’s motive is to provide you the information required for troubleshooting the alert “iSCSI Configuration Failed” for your Nutanix cluster.What is iSCSI Configuration? To provide access to cluster storage, Nutanix Volumes utilizes an iSCSI data services IP address to clients for target discovery which simplifies external iSCSI configuration on clients. This iSCSI data services IP address acts as an iSCSI target discovery portal and initial connection point. This IP address is also used as a cluster-wide address by clients configured as part of Nutanix Files and other products.The iSCSI Configuration Failed alert can be generated if Nutanix Guest Tools failed to execute some iSCSI commands on the guest VM.For more troubleshooting, check KB-10118.For information on the iSCSI Configuration, check the iSCSI guide.

3 years ago

Riddhima.singhNutanix Employee

posted in How It works

Asynchronous Replication with Azure

AWS or Azure can be configured as a remote site for backup and restore operations, this feature is known as cloud connect. The cloud connect feature enables you to back up and restore copies of virtual machines and files to and from an on-premise cluster and a Nutanix Controller VM located on the Amazon Web Service (AWS) or Microsoft Azure cloud. The Nutanix Controller VM is created on an AWS or Azure cloud in a geographical region of your choice. It is a single-node cluster with a 30 terabyte (TB) disk attached to the node, with a usable disk capacity of 20 TB. Amazon or Azure customers are charged only for capacity that is used (not charged for the full capacity). Once configured through the web console, the remote site cluster is managed and monitored through the Data Protection dashboard like any other remote site you have created and configuredCloud configuration guide at : Cloud Connect (AWS AND AZURE)Step-By-Step Azure Remote Site Configuration for Azure Cloud Backuphttps://port

3 years ago

Kiran SuryaNutanix Employee

posted in How It works

Memory allocation and distribution on the AHV Hypervisor

Memory allocation and distribution on the AHV Hypervisor is always a tricky equation and not very easy or straight forward to calculate. I decided to dig deep into this aspect, and the findings were quite intricate.I ran the following command from the Acropolis Master and gathered information for Host 10.21.46.243:$ links http:0:2030 Let us refer to the data obtained for this Host on this listing:Host IP: 10.21.46.243CPUs: 88CPUs used: 37.58CPU free: 50.42Memory: 515822 MB say 512 GBMemory used: 261104 MB say 261 GBMemory Reserved: 0 MBMemory free: 254718 MB say 255 GBPlease note that the output we obtain by running # cat /proc/meminfo on the Host hypervisor will show small numbers for MemFree and MemAvailable fields (less than 0.2%of the Total RAM on the Host): [root@NTNX-16SM76360147-A ~]# cat /proc/meminfo | head -3MemTotal: 528210648 kBMemFree: 1891960 kBMemAvailable: 2619508 kB[root@NTNX-16SM76360147-A ~]#This is because Memory allocations are made in advance by

3 years ago

Albert MendozaNutanix Employee

posted in How It works

New KB Articles Published on Week Ending October 17, 2020

Below are new knowledge base articles published on the week of October 11-17, 2020.KB 9073 - Two-Node Cluster: Unauthorized request to witness after password changed for witness KB 9795 - Advanced NUMA Configuration Options Under AHV KB 9951 - Pre-Upgrade Check: test_spdk_managed_disks_present KB 10003 - Install dot net Framework 3.5 on Windows 10 KB 10052 - VM console access fails with "Connection Error" if the VM name has "#" special character KB 10131 - vGPU VMs may not power on after AHV 20190916.x upgrade KB 10151 - Unable to enable pulse as it is failing with error "not able to communicate to https://insights.nutanix.com:443" KB 10154 - PE and PC custom login UI settings are not Persistent KB 10157 - install_host_package on AHV skips NVIDIA Volta (V100) and Turing (T4) model GPUNote: You may need to log in to the Support Portal to view some of these articles.

3 years ago

Kiran SuryaNutanix Employee

posted in How It works

Disk space taken up by every VM, and all VMs in total, in the Nutanix AHV cluster

Nutanix customers using AHV as their Hypervisor often run into disk space issues on their cluster and need to evaluate how much disk space is being consumed by each entity. And one of the more important factors that needs to be considered is how much space is being taken up by each VM. There needs to be an easy way of running one single command and get a listing of the space consumed by each VM, so that at one glance you can figure out which are the VMs that can be removed from the cluster right away in order to get some space reclamation. As a bonus I have also included the command string that will add up all these numbers and give you the grand total of how much disk space has been consumed by all these VMs put together.I have come up with the following string manipulation to be able to get those numbers:nutanix@CVM:$ for Q in `acli vm.list | awk '{print $1}'`;do echo -n "$Q "; acli vm.get "$Q" | grep vmdisk_size | awk '{sum+=$2} END {print sum}' | awk '{ byte =$1 /1024/1024/10

3 years ago

Manjula123Nutanix Employee

posted in How It works

License a cluster after adding node

Here are simple steps in order to license the newly added node/nodes to the existing cluster:1. Generate a new cluster summary file from Prism element (cluster)2. Upload this file in the support portal under “manage licenses”.{Menu-->Licenses-->manage licenses}3. Next click on “manually manage licenses” option in blue.4. You will see your previously used up licenses , now you need to select licenses for the new node (click on dropdowns and put a check mark)5. Once you have selected all licenses you will get an option “save” and then “Next” on the bottom right.6. Next page will show you list of licenses which would be consumed, click on “confirm”.7. License file is generated , apply this file to the cluster. All nodes should be licensed now.

3 years ago

AarthiKamNutanix Employee

posted in How It works

Enabling vNUMA on your AHV cluster

What is vNUMA?vNUMA (virtual non-uniform memory access) is a memory-access optimization method for VMware virtual machines (VMs) that helps prevent memory-bandwidth bottlenecks.The primary purpose of vNUMA is to give large virtual machines (or wide VMs) the best possible performance. vNUMA helps the wide VMs create multiple vNUMA nodes. Each vNUMA node has virtual CPUs and virtual RAM. Pinning a vNUMA node to a physical NUMA node ensures that virtual CPUs accessing virtual memory can get the expected NUMA behaviorBefore enabling vNUMA on Virtual Machines, see AHV Best Practices Guide.To enable vNUMA on your Virtual Machines, check this guide.

3 years ago

NutonianNutanix Employee

posted in How It works

Nutanix Command Line Interface

Nutanix presents us with many management interfaces like HTML5(Prism), REST API, acli and ncli for managing and troubleshooting and maintaining work infrastructure. We will look into how to access the Nutanix Command line Interface and what the capabilities and purpose of acli and ncli command-lets areaCLI: Acropolis Command Line Interface Utility to create, modify and manage VMs in AHV. Provides extra abilities(commands) to manage AHV host networking, manual snapshot etc Cannot manage Nutanix Cluster and so we have ncli nCLI: Nutanix Command Line Interface Utility to manage the entire Nutanix cluster operations. Ncli is more extensive and complex command set To access the CLI, You can install it on your local machine Check out how to install ncli on your local machine here. From any Controller VM SSH to any CVM as a nutanix user and type ncli and hit return to enter the ncli command shell and will be the same process for acli.Once inside the shell, you can view the list o

3 years ago

Riddhima.singhNutanix Employee

posted in How It works

Enabling HA on vSphere 7.0 cluster fails to enable VMCP

In VMware vCenter, when a new cluster created, the default HA configuration is disabled: When opening the HA configuration for this cluster (Select cluster in inventory -> "Configure" tab -> vSphere Availability section -> "Edit" button for vSphere HA) we can see that HA is disabled and the response for "Datastore with PDL" and "Datastore with APD" is pre-defined as "Power off and restart VMs". While this new cluster is still empty, if vShere HA is turned on from this configuration window, it unlocksconfiguration sections for PDL/APD response: If the response under "Datastore with APD" was not changed to "Disabled" before adding host(s) to the cluster then, later when freshly imaged ESXi host(s) (with Misc.APDhandlingEnable = 0 set by foundation process) are added to cluster, the APD response configuration section is locked and cannot be changed to "Disabled" according our recommendations for standalone clusters. As a result, attempting to enable HA on this cluster fails wit

3 years ago

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