Deployment Success

So you are planning to configure VM-VM anti-affinity policy in your AHV environment to ensure critical VMs run on different hosts. That’s thoughtful thinking right there and it makes sense.   Now if you create this policy when the VMs are off... when you power them on, you’ll see the policy kick in and the VMs will be running on different hosts.   But… what if the VMs were powered on when you applied the policy? Do you have to restart the VMs?   The answer is No.   After the policy is created, Acropolis Dynamic Scheduling  (ADS) will migrate the VMs running on the same hosts to different ones.  This will not happen immediately though. It takes a while for ADS to start migrating these VMs.   So sit relaxed, you created the policy… ADS will take care of it.   Want to know how to configure VM-VM anti-affinity policy or how to delete it. Check it out here   Have any questions? Drop a comment and let's start a discussion.

Below are new knowledge base articles published on the week of February 9-15, 2020. KB 5512 - REST API: Alerts data placeholders are not populated KB 8803 - How to change ESXi Host TLS version running on Nutanix cluster KB 8812 - Moving Nutanix nodes to chassis of different generation KB 8855 - How to change Virtual Machine video card memory in AHV KB 8897 - Nutanix Collector "We couldn't find this IP address or host name" KB 8916 - LCM operation may timeout when performing upgrades in ESXi environments KB 8924 - How to map Nutanix Volumes disk from Linux VM to vdisk KB 8942 - karbonctl commands with --pc-username and --pc-password flags fail with 'no consumer: "text/html; charset=iso-8859-1"' error KB 8951 - Alert - A160068 - AFSDuplicateIPDetected KB 8955 - RMA: Return Instructions (APAC) KB 8962 - Unable to browse containers using WinSCP when it contains files name with non-English characters KB 8963 - PRISM displays the wrong speed for the NICs faster than 10G Note: You may need to

Working using CLI is easy, simple, elegant and fast. Every administrator loves scripting and automating tasks using the command line. Nutanix makes Management tasks related to virtual disks easy, simple and efficient using CLI. So, what are the situations in which you might need to perform VM Disk management actions if you’re an administrator? You created a VM with a disk of 250GiB and now you need to increase it to 500GiB What if you need to increase the size of a VM Disk? Created a Disk but now need to clone it to different VMs! Need to create an image from a VM disk? Created a VM with the wrong BUS Type! Do we need to change the index of IDE disk? We all have faced a situation in which we might need to insert an ISO to a CD ROM or eject a CD ROM We have created a Volume Group and now need to manage the disks in the VG Most of these actions can be performed using the Prism GUI but what if we are more interested in CLI approach and want to automate these day-to-day admin tasks Do we

Every modern architecture solution requires data saving and optimization techniques to manage their workload efficiently and optimally. Nutanix HCI provides various techniques for storage optimization based on your workloads. Let us take a look around regarding the techniques to understand the working and best practices.      1. Compression  There are two types of compression available   Post-process compression Inline compression Want to know how compression works and how to enable it in your cluster?  Compression Guide   2. Deduplication   Deduplication reduces space usage by consolidating duplicate data blocks on Nutanix storage.  Want to know more about different types of Deduplication and the best practices of using Deduplication? Deduplication    3. Erasure Coding Erasure coding increases the usable capacity on a cluster. Instead of replicating data, erasure coding uses parity information to rebuild data in the event of a disk failure. The capacity savings of erasure codin

Hi Guys,   i have some questions, first, can we enable flow on ESX hypervisor on nutanix? i have same question with calm on esxi and i get the answer we can enable calm on esx based on nutanix KB, but how about flow? can we enable/using flow on top esx hypervisor?  and just courious, anyone have table comparation about feature nutanix running on ahv, esx, hyperv?

Hi, NCC is reporting that I’m missing the cpupower command. Seems strange. I’m using a i7-2600k processor in each node. Should I install the package using yum repositories?  Where does it run, host or CVM?   Detailed information for host_cpu_frequency_check: Node 192.168.0.127: ERR : Error while getting host CPU frequency range. bash: cpupower: command not found   Node 192.168.0.121: ERR : Error while getting host CPU frequency range. bash: cpupower: command not found   Node 192.168.0.125: ERR : Error while getting host CPU frequency range. bash: cpupower: command not found   Node 192.168.0.123: ERR : Error while getting host CPU frequency range. bash: cpupower: command not found

Let's say that you upgraded your cluster and noticed that the timezone of your AHV has changed, why and what is the recommended practice?  When running a health check, you will see a warning stating that "The AHV host's time zone was changed/set to something other than UTC." Nutanix recommends against making any configuration changes on the AHV hosts which includes changing timezone, from AHV version 20170830.58, the default timezone on AHV hosts is set to UTC upon upgrade or installation, for more information check out KB-6834 In this case, no further action is required from your side. To edit the timezone of a user VM, check out KB-3134 To edit the timezone of a CVM, check out KB-1050

Ever thought a lot about advantages of UEFI over legacy BIOS? No? Who does that anyway?   To start with, UEFI firmware is a successor to legacy BIOS firmware that supports larger hard drives, faster boot time and provides more security features. Creating and starting VMs with UEFI firmware provides the following advantages. Faster boot time Avoid legacy option ROM address constraints Include robust reliability and fault management Use UEFI drivers   AOS 5.11 onwards we have a functionality to see the Boot Configuration from Prism UI by following the steps below:-   Navigate to the VM page -> select your VM. Click on Update. Under boot configuration, you can see if its Legacy BIOS or UEFI.   Want to know more about UEFI Support for VM in Nutanix, click here   Have any questions? Drop a comment and let us start discussing.

Howdy,   I’ve searched through all corners of the web, but still didn’t find a clear answer to this question: can Nutanix prioritize packets and/or traffic in OVS? And, if yes, is there some online how-to that I can refer to to learn how to do that?   Thanks in advance,

Howdy, I already know that Debian is an unsupported Linux distribution for using NGT on. But I still *must* try NGT on it... how can I force the instalation of NGT on Debian?

 Hyper-V Network Cheat sheet.

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

Can someone help me with a power shell script which can help us to build multiple VMs by using a Win10 template we have. The environment that I am trying to build the VDIs have Nutanix as the Hardware and ESX 6.5 as the Hypervisor. The script should able to build the machines with sequential number and put them under a specif folder in Hypervisor. I can get the different templates for different containers and with proper Vlan.

If you are trying to install any third party software, specially Antivirus packages on Nutanix AHV hosts or Nutanix CVMs please consider the following: As for running antivirus (or any third-party software) on the CVMs and AHV hosts, this is not something that we support or can allow. The CVM should be treated as a network appliance, with access controls put in place to ensure that only authorized access is allowed, and kept up-to-date with the latest CVE patches. Installing any packages on the Nutanix CVMs is unsupported. Moreover, installing packages on the CVMs will void the support. In general, an antivirus being installed on the Nutanix CVM is not recommended as it can have ill effects on performance and cause negative impact on the stability of the system. However you can install antivirus on HYPER-V and VMware hosts, just follow these articles: KB 2360 Antivirus on Nutanix on vmware. KB 5153  Antivirus on Nutanix Hyper-V Nodes. If you like this content, consider clicking the -

Let's say you had an issue in your cluster and you have worked with a Nutanix engineer.  If the issue needs deep investigation, we usually create a log bundle locally on the CVM and then we ask you to upload it to the portal, then we drop the remote session so the customer doesn’t have to wait online while we investigate. After generating the bundle, it will be saved locally on your CVM and it's not automatically removed.  You can delete the bundles if you don't need it anymore to free more space on the CVM, as the CVM is a very critical component in the Nutanix eco-system and it's very important to have enough space and memory for it to perform it's tasks.  Make sure that you do not remove a directory under "logbay" but simply a file or files inside a sub-directory.  Usually the two directories that gets populated the most are "/data/logbay/bundles" and "/data/logbay/taskdata", deleting the files inside these directory will free up some space.  Check out how to create a log bundle at 

There can be instances where one might forget the CVM password and is not able to access the command line.    Is there a way we can recover/reset the CVM password?   Well, there is a way to recover/reset your CVM nutanix password using the prism console. Of course for that, one needs to have the prism password in hand.   We can set up passwordless ssh by generating ssh keys from your pc/desktop and then adding your public key to the cluster through the prism. So when you try to login to the CVM from the same pc/desktop, it will not prompt you to enter the password and will directly log you in.   The article detailing the steps on how to do the above is KB-1895    Now once you’re in, you can change the password by simply following KB-2233   Have any questions? Drop a comment and let’s start a discussion.

We all have encountered file system corruption in our environment and sometimes it can bring down the entire production architecture.  Do we have a mechanism to proactively check for File System corruption in a Controller VM irrespective of the hypervisor? Nutanix Cluster Check has a specific check “fs_inconsistency_check ” to look for EXT4-fs error/warning in system logs periodically and inform the end-user.  Need more information regarding the Check? Try giving the following KB article a read. KB-8514 So, what should we do in case NCC Health check reports the error? The article mentions steps to identify if it is a false positive or we need to reach out to Nutanix Support with a particular log bundle. KB-8514 Need more help regarding an NCC Health check or confused regarding the same? Drop a comment and let’s start a conversation.  

3 Identical pc's P300 Lenovo running I-9900 Cpu's error back saying non intel CPU

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

Hello all, I just realize that it is available IBM HCI servers with Power9 processor together with Nutanix. As far as I can understand from the documentation it is only for AIX and Linux workloads? My question is: is it posible to run workloads with OS400-AS400 instead of AIX?   Thanks Best Regards Javier de Mingo AGROSEGURO

Hello All, Sami here, the 3rd party developer responsible for the current official Nutanix Visio stencils. I’ve been playing with few ideas how to make them better and came up with Dynamic Nutanix Visio stencils.    Why DPTPB Dynamic Nutanix Visio shapes?   Let's be frank: Documenting can be boring, all the exciting and fun stuff has been done and now you have to document what you've done or plan to do. The harder the tools used for documenting are to use, the less likely you are to produce quality documentation. My aim with the Nutanix Dynamic Visio shapes is to have ability to produce more detailed and accurate drawings of Nutanix environments in less time. This is accomplished by using intent based workflow and to have built-in automation to populate the drawing with desired elements based on your intent.   What are DPTPB Dynamic Nutanix Front and Rear View Shapes?   DTPPB Nutanix Dynamic Front & Rear View Shapes are Nutanix NX appliance product images / shapes in Microsoft Visi

AOS upgrade appears to go well, but my CE three node cluster didn’t complete the first AHV upgrade. Now CVM is off line.  I’m looking a logs but not sure what to look for.  /var/log [root@NTNX-04524900-A log]# cat ahv-host-agent.log 2020-01-30 19:02:44,734 host_agent_.py:34 INFO Starting host agent 2020-01-30 19:02:44,734 host_agent_.py:67 INFO Generating /var/lib/ahv-host-agent/schema//api.json 2020-01-30 19:02:44,818 host_agent_.py:92 INFO Connecting to libvirt 2020-01-30 19:02:44,819 task_store.py:354 INFO Started task garbage collector 2020-01-30 19:02:44,821 host_agent_.py:98 INFO Connected to libvirt 2020-01-30 19:02:44,821 manager.py:50 INFO Starting CollectorManager 2020-01-30 19:02:44,825 manager.py:50 INFO Starting pid monitor OvsVSwitchdMonitor 2020-01-30 19:02:44,825 manager.py:110 INFO EventManager thread is listening on 127.0.0.1:2031 2020-01-30 19:02:44,825 process_monitor.py:99 INFO Starting ovs-vswitchd process monitoring ... 2020-01-30 19:02:44,872 server.py:56 INFO S

Hi AllAfter upgrading the NCC version, I get this message CVM was renamed after installation - I haven't changed it!  The recommendation is bizarre - Rename CVM back to its original name.  CVM name is noncofigurable by the end user.So if it is non configurable , what changed it and how do I get it changed back ?  Or is it just having an identity crisis?Is there a fix?

If your company hardening policies require to show the welcome banner on each CVM each time a user logs in, you can disable it, make the necessary changes per our Security Guide (https://portal.nutanix.com/#/page/docs/details?targetId=Nutanix-Security-Guide-v5_16:Nutanix-Security-Guide-v5_16) and then reenable it. The following KB 8534 has the complete procedure and the commands needed to apply the banner changes in your environment.

Let's say that you performed a vulnerability scan on one of the CVMs and you see that some unused ports are open, what are these ports and why are they opened? For example, some of the ambiguous ports that are open are ports 445 and 2071, but you won't find documentation for this. Port 445 used by CVMs are used by stargate service, a critical service used by hypervisor/UVMs to access our storage Port 2071 is for the NGT regardless of your hypervisor type. Some use cases for NGT for non-AHV hypervisors are application consistent snapshot, file level restore, etc.  Closing the wrong port might affect your cluster performance, you should be careful when editing any port. If you are unsure of what a specific port is, contact Nutanix support for information and assist. Here are some commands to modify the ports on your nodes: https://portal.nutanix.com/#/page/docs/details?targetId=Nutanix-Security-Guide-v510:wc-cvm-firewall-block-unblock-ports-cli-t.html   Example of firewall ports that mus