Deployment Success

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

Below are new knowledge base articles published on the week of February 2-8, 2020. KB 8259 - Prism Central Backup and Restore Using Metro Availability on ESXi KB 8728 - Nuclei or REST API does not sort entities in a human friendly way KB 8775 - False positive Alert A103088 : "CVM {} is unreachable" generated due to out of memory condition for cluster_health cgroup KB 8836 - Nutanix Files - Linux UID and GID not mapping correctly to Active Directory configurations KB 8862 - Only 500 Recovery Points are displayed in Prism Central KB 8894 - Genesis crashes with "TypeError: must be string without null bytes, not str" error after node expansion or cluster create KB 8898 - [Karbon] Deployments failure with error ETCD: rejected connection from " <PC>:<port> " (error "remote error: tls: bad certificate", ServerName "" KB 8899 - [ CSI ] Plugin fails to mount a volume on Ubuntu with error "while loading shared libraries: libisns-nocrypto.so.0" KB 8901 - Flow | Number of required Flow

In certain scenarios, after upgrading to LCM 2.2.9225 by performing inventory, the inventory objects, software/firmware updates are not displayed in the LCM page on PE (Prism Element) when logged in as an AD user.   This issue is generally observed if the AD Domain does not have a service account associated with it in Prism. Service account configuration in Prism was not mandatory in AOS versions older than 5.5. If authentication with the AD Domain was configured when the cluster was running the older versions, you are likely to hit this problem.   You can identify the issue either from the Prism UI or from the ncli, for the UI identification: log in to Prism > Settings (gear icon) > Authentication > Check if a service account is configured.   For the ncli identification and the solution check out: https://portal.nutanix.com/kb/7598   This is fixed in AOS 5.11, 5.10.6 or later.

Hello, I’m trying to configure two AHV clusters (3 nodes) for replication. Both environments are running AOS 5.11.2 on HPE DX360 Gen10.   The network environment is spread between two stacks: one stack dedicated to the storage with 10Gb interfaces and one stack for the LAN with 1Gb interfaces. There is no connection between these two networks. After the deployment of the nodes and the configuration of the clusters, I start to configure the Backplane Network with the following parameter: Subnet: 172.16.250.0 Netmask: 255.255.255.0 VLAN: 202 Host node: br1 The backplane network of the first cluster works without any problem. When I do the same (with the same) for the second cluster, it fails. It says that the IPs addresses are already in use.  I would like to specify a VLAN/subnet where both clusters have their backplane IPs so I can use the backplane network for the replication between both clusters.   I hope this is clear.   Kind regards,   Fred 

I’m trying to reconfig my ip addresses for the cvm but i cannot find the external_ip_reconfig script anywhere.  Do I have to download this from the site?

Hello, I want to share a development in python to collect information from the Nutanix cluster with AHV, very similar to an RVTOOLS. I have it published in Github. I hope you find it useful. Any questions or queries can write to dlira96@gmail.com https://github.com/dlira2/Nutanix-tools-for-AHV Example running : Example INFO: Summary VMINFO : And lot more info SUMMARY VM INFO with Prism Central info ( Project ) VM DISK INFO VM NETWORK STORAGE CONTAINER HOST AHV VOLUME GROUP VDISK INFO IMAGE The name of the file for the output of the script is something like this: NTNX_VM_INFO_PE_(ST-NTNX-01)_DATE_(11_04_2019_17_12HRS).xlsx

I have a cluster running on an NX-3060-G5 with XenServer hypervisor that I want to completely rebuild on Acropolis. I’m looking for documentation on how to do this. Our original cluster was built by a Nutanix engineer onsite and I recall he had to install the foundation software on another machine, but I don’t recall all of the steps he took. Can someone point me in the right direction?