How It works

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..

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. 

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

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,

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!

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 ar

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?

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

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

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

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.

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 requireme

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 f

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

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

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

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"

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 ??

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"

Here is my Code Snip [System.Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}$body = "{`"kind`":`"vm`", `"filter`":`"vm_name==.*VMName*`"}"$username = "Admin";$password = ConvertTo-SecureString –String "AdminPassword" –AsPlainText -Force$credential = New-Object –TypeName "System.Management.Automation.PSCredential" –ArgumentList $username, $password$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $username,$password)))$response = Invoke-RestMethod 'https://PRISMIP:9440/api/nutanix/v3/vms/list' -Method 'POST' -Headers @{Authorization=("Basic {0}" -f $base64AuthInfo)} -Body $body -Credential $credential$response | ConvertTo-Json And my Response is  Invoke-RestMethod : {"state": "ERROR", "code": 401, "message_list": [{"reason": "AUTHENTICATION_REQUIRED", "message": "Authentication required.", "details": "Basic realm=\"Intent Gateway Logi

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?

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.  

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    

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  

I share my software to collect information associated with a Nutanix cluster with AHV hypervisor. Link to download NIACtool v2.1