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3160 Topics
maaz
Nutanix Employee
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

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maaz
Nutanix Employee
Pablo Alejandro
Pablo AlejandroVoyager
asked in Installation & Configuration
Stacked switches with AHV?

Hello,i have some questions regarding “Switch stacking”1-) Is it possible to use " 2 stacked switches " as TOR with AHV? there will be a problem if we use this configuration?2-) The best practice is to use 2 Stacked switches or 2 individual switches?We plan to use Active-Backup configuration and conect SFP to Switch1 and the other SFP to Switch2I am not a network specialist so i am not sure if both switches are stacked, and we plug 1 SFP to SW1 and the other SFP to SW2, the active passive configuration will work

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Neel Kotak
Nutanix Employee
cfrancke
cfranckeAdventurer
asked in How It works
Citrix Cloud integration to Nutanix - Where to get the connection data?

Hi, I am working on an integration between Nutanix and Citrix but stuck at the moment at this point: Where in the Citrix Cloud can I find these values?Kind regardsChristian

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Diego Oliveira
J
Jose A. HernandezAdventurer
asked in Installation & Configuration
vCenter Server Appliance upgrade (6.7 to 7.0)

The upgrade process for the VCSA from a major release to another is as follows:A new VCSA with a temp IP is created in the vSphere host/cluster by the upgrade process. The upgrade process migrates the config/data from the old VCSA to the new one. The Old VCSA is shutdown and the new VCSA is renamed/re-ip with the values of the old VCSA. New VCSA is then rebooted.At this point the new VCSA should have the old VCSA name and IP address.  My question for those that have done this already is, how does the Nutanix cluster Prism element reacts to this in regards to its vcenter registration? Will all this be transparent to it or will it see the new VCSA as a new device and create a duplicate entry? I assume the migration process will copy SSH keys and certs from the old VCSA to the new one so Prism won’t bat an eye, but I just wanted to confirm. 

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frsbeckum
SteveNutter
SteveNutterVoyager
asked in Installation & Configuration
Network Visualization with Cisco Nexus 9K Switches

Hello ... can anyone provide feedback on getting Network Visualization working with Cisco Nexus 9K Switches. The Nexus Series is on the Supported Switch list, but I've had a ticket open with Support for weeks and we can't get it working. https://portal.nutanix.com/#/page/docs/details?targetId=Web-Console-Guide-Prism-v510:wc-network-visualizer-supported-switches-r.html LLDP is enabled globally on the 9K, and I can populate the 9K switch info into Prism just fine. The issue is I can't get any port data. Nutanix Support is saying the issue is by default the "port-id-subtype" is set "locally-assigned", and it needs to be changed to "interface-name". The 9Ks are in ACI-Mode, not NX-OS, and no one seems to know how or where the change is made. Has anyone gotten this setup to work? Here are some pics from my environment. Thanks!

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A
AntonioMVoyager
asked in How It works
File localhost_access_log in CVM

Hi, I have one CVM out of space in /home, I have seen that I have the file localhost_access_host.txt with almost 20GB.Could I rotate or delete this file?In another CVM I don’t see this file.Regards,Antonio Maeso

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Alona
Nutanix Employee
frsbeckum
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

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frsbeckum
frsbeckum
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

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frsbeckum
Albert Mendoza
Nutanix Employee
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.

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Albert Mendoza
Nutanix Employee
Riddhima.singh
Nutanix Employee
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

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Riddhima.singh
Nutanix Employee
G
Nutanix Employee
GaretNutanix Employee
posted in How It works
Upgrading Nutanix Move

Nutanix Move is a very versatile tool which is used to migrate existing VMs, from various storage sources and hypervisors, into a Nutanix infrastructure. Many users have already enjoyed its functionality and ease-of-use.Often, users will migrate multitudes of VMs into their new Nutanix infrastructure using Move, and then either delete or forget about the Move VM itself thereafter. Later, when more VMs are sought to be migrated, users will either reinstall Move again or attempt to leverage the Move VM that remained from the previous migration.For those users leveraging an existing Move VM within their infrastructure and, as it is generally a good idea to use the latest version of Move when possible, it is possible to upgrade the Move VM to the latest available version right from its own dashboard (and, even by CLI if desired).You can find more information regarding upgrading Move from within the Online Upgrade section of the Move User Guide.

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G
Nutanix Employee
rohan.saksena-55595
Nutanix Employee
rohan.saksena-55595Nutanix Employee
posted in How It works
Hardening Instructions for AHV and CVM (NCLI)

Hardening is the process of securing a system by reducing its surface of vulnerability, which is larger when a system performs more functions; in principle a single-function system is more secure than a multipurpose one. Reducing available ways of attack typically includes changing default passwords, the removal of unnecessary software, unnecessary usernames or logins, and the disabling or removal of unnecessary services. There are various methods of hardening Unix and Linux systems. This may involve, among other measures, applying a patch to the kernel such as Exec Shield or PaX; closing open network ports; and setting up intrusion-detection systems, firewalls and intrusion-prevention systems. There are also hardening scripts and tools like Lynis, Bastille Linux, JASS for Solaris systems and Apache/PHP Hardener that can, for example, deactivate unneeded features in configuration files or perform various other protective measures. We can implement Security Hardening features for Nutani

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rohan.saksena-55595
Nutanix Employee
AarthiKam
Nutanix Employee
AarthiKamNutanix Employee
posted in How It works
What is Application Monitoring?

Application monitoring provides visibility into integrated applications by collecting application metrics using Nutanix and third-party collectors, providing a single pane of glass for both application and infrastructure data, correlating application instances with virtual infrastructure, and providing deep insights into applications performance metrics. The monitoring integrations dashboard allows you to view information about select applications, such as SQL Server instances, running in the cluster. Before you decide to enable this, there are some pre-requisites that you need to follow.  To learn more about the prerequisites, click here and for more information about Application Monitoring, check the Application Monitoring Guide. 

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AarthiKam
Nutanix Employee
R
Nutanix Employee
raajiNutanix Employee
posted in How It works
Troubleshooting Drive fail on the nodes

When a drive on a host (SSD or HDD) experiencing a recoverable errors, warnings or a complete hardware failure, the stargate service will mark the disk as bad. The following can be observed when a disk fail occurs. Disk is shown as a red  or a plain grey in prism A critical error in Prism stating the disk went bad.  Troubleshooting steps  Identify the problematic disk in Prism. Check the Prism web console for the failed disk. In the Diagram view, you can see red or grey for the missing disk. Check the alerts in the Prism web console for the disk alerts, or use the following command from any of the working CVMs in the cluster to check for disks that have generated the failure messages. ncli alert ls Check to see if the disk is being recognized by the black plane. Execute the following command from the cm of the node that shows disk fail list_diks Check to see if the disk is mounted on the node. df -h Check for offline disks using NCC check disk_online_check. ncc health_checks

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DavidN
M
MayurKAdventurer
asked in How It works
Rest API Question

Using the RestAPI, we are able to pull around 300 metrics from Nutanix. Do you have a document which explains what all these metrics are, similar to the page we have for the metrics available via SNMP (https://portal.nutanix.com/page/documents/details?targetId=Web-Console-Guide-Prism-v511:man-nutanix-mib-r.html)

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M
Sergei Ivanov
Nutanix Employee
Sergei IvanovNutanix Employee
posted in How It works
ESXi | Container size in vCenter doesn't correlate with the size in Prism

To start this topic, it is worth to mention the difference between the data size units. There are GBs (gigabytes) and GiBs (gibibytes). The difference is the following:GB = 1000 MBGiB = 1024 MiBSo, the difference is in binary vs decimal representation. It can be confusing, because a lot of people have never heard of gibibytes and always thought that GB is 1024 MB. In fact, it is not exactly true Why it may be confusing in Nutanix running on ESXi hypervisor?Nutanix is using MiB, GiB, TiB, etc as data size units. When you create a storage container, you get the size in binary units. For the example, i have created 2 containers with advertised capacity of 1000 GiB and 1024GiB:We can see, that the 1000 GiB container is 0.98 TiB is total size, because 1 TiB=1024 GiB.However, when we go to the vCenter, we can see a different picture:vCenter reports that the 1000 GiB container is 1000 GB in size and 1024 GiB container is 1TB. But 1 TB is 1000 GB! The problem here is that the vCenter shows teb

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Sergei Ivanov
Nutanix Employee
Albert Mendoza
Nutanix Employee
Albert MendozaNutanix Employee
posted in How It works
Top KB Articles for September 2020

Below are the top knowledge base articles for the month of September 2020.KB 4116 - NX Hardware [Memory] – Alert - A1187, A1188 - ECCErrorsLast1Day, ECCErrorsLast10Days KB 7503 - NX Hardware [Memory] – G6, G7 platforms - DIMM Error handling and replacement policy KB 4141 - Alert - A1046 - PowerSupplyDown KB 1540 - What to do when /home partition or /home/nutanix directory is full KB 4158 - Alert - A1104 - PhysicalDiskBad KB 6970 - PE-PC Connection Failure alerts KB 1113 - HDD/SSD Troubleshooting KB 4519 - NCC Health Check: check_ntp KB 4409 - LCM: (LifeCycle Manager) Troubleshooting Guide KB 2090 - AHV | Host Networking KB 2473 - NCC Health Check: cvm_memory_usage_check KB 4272 - Alert - A6516 - Average CPU load on Controller VM is critically high KB 1863 - NCC Health Check: sufficient_disk_space_check KB 3741 - NGT: Nutanix Guest Tools Troubleshooting Guide KB 3784 - Alert - A1030 - StargateTemporarilyDown KB 7386 - NCC Health Check: power_supply_check KB 6945 - How Upgrades Work at N

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Albert Mendoza
Nutanix Employee
A
A College StudentTrailblazer
asked in How It works
Proxy script

Hey guys,I’m new at scripting/coding with python, I am trying to make a script that will automate adding a proxy, proxy whitelist and remove whitelists. This is what I have so far, but whenever it runs I get an error of “Error: Argument 'http-proxy' is specified multiple times.” import subprocessimport sysadd_whitelists = "ncli http-proxy add-to-whitelist target-type=IPV4_ADDRESS target="whitelist_Ip = ["192.168.1.1", "200.200.1.1"]login = "nutanix@192.168.1.50"add_pxy = "ncli http-proxy add name=NPX5-proxy address=proxy.npx5.local port=8080 proxy-types=HTTPS"list_proxy = "ncli http-proxy get-whitelist"#ssh connectionssh = subprocess.Popen(["ssh", "-i .ssh/id_rsa", login], stdin =subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True, bufsize=0)# Send ssh commands to stdinssh.stdin.write(add_pxy)for ip in whitelist_Ip: ssh.stdin.write(a

3320
A
C
CanAlmaScout
asked in How It works
Possible values of group_member_attributes in /v3/groups

Hi, I’m looking to understand the possible values for group_member_attributes in the POST /v3/groups request. I’ve gotten some examples from debugging the Prism UI requests (e.g. “project_name”, “vm_name”), but is there a full list published somewhere? I’d looked in the API docs and had a search of the forum but couldn’t see group_member_attributes detailed - apologies if I’ve missed it. Thanks in advance.

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R
Nutanix Employee
MVerhaeghe
MVerhaegheVoyager
asked in How It works
Karbon, Kubeconfig and API

Hi all, I tried to get the kubeconfig renewal made by Ansible with the use of the Karbon API. All is fine except for the format of the kubeconfig file. I have a lot of \n characters and some additionnal information. Is there a way of getting a correct kubeconfig file without all these or we have to clean the file in order to get it work ?For example, this is the content of the file : {"kube_config":"# -*- mode: yaml; -*-\n# vim: syntax=yaml\n#\napiVersion: v1\nkind: Config\nclusters:\n- name: xxxx-xxxx-xxxx-\n  cluster:\n    server: https://xx.xx.xx.xx:443\n    certificate-authority-data: LS0tLS1CRUdS0tCk1JSURyVENDQXBXZ0F3SUJBZ0lVWkJuMkxpWG13aURvbWVxQU5wWmY3emxoaEpjd0RRWUpLb1pJaHZjTkFRRUwKQlFBd2JURUxNQWtHQTFVRUJoTUNQ2tOaGJHbG1iM0p1YVdFeEVUQVBCZ05WQkFjVApDRk5oYmlCS2IzTmxNUkF3RGdZRFZRUUtFd2RPZFhSaGJtbDRNUlV3RXdZRFZRUUxFd3hKYm1aeVlTQkxZWEppCmIyNHhEVEFMQmdOVkJBTVRCSEp2YjNRd0hoY05NakF3TmpJeU1Ea3dNVEF3V2hjTk16QXdOakl3TURrd01UQXcKV2pCdE1Rc3dDUVlEVlFRR0V3SlZVekVUTUJFR0ExVUVDQk1LUTJGc2FXWnZjbTV

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R
Nutanix Employee
Riddhima.singh
Nutanix Employee
Riddhima.singhNutanix Employee
posted in Installation & Configuration
Guidelines of AOS for TWO-NODE CLUSTER

A traditional Nutanix cluster requires a minimum of three nodes, but Nutanix also offers the option of a one-node or two-node cluster for ROBO implementation. Both of these have a minimum requirement for the CVM to be allocated with 6 vCPUs and 20 GB memory.Specifically for two-node, there have been several improvements in 5.10 to ensure optimal health of the cluster.Customers should upgrade to a minimum version of AOS 5.10.7 to avoid encountering any of the potential service impacting issues present in earlier releases of AOS.The table provides a summary of improvements in the document here-https://portal.nutanix.com/page/documents/kbs/details?targetId=kA00e0000009DaXCAUMore information about two node cluster can be found out -https://portal.nutanix.com/page/documents/details?targetId=Web-Console-Guide-Prism-v5_18:wc-cluster-two-node-c.htmlROBO implementation meaning - Short for remote office, branch office ROBO is a term used to refer to any off-site office that connects to the organ

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R
Nutanix Employee
M
Nutanix Employee
Mohammed111Nutanix Employee
posted in How It works
What is Nutanix Era?

Era is a database as a service (DBaaS) that automates and simplifies database administration, brings one-click simplicity and invisible operations to database provisioning and life-cycle management. Era enables database administrators to provision, clone, and refresh the database clones to any point in time. Era allows administrators to define standards for their database provisioning needs with end-state driven functionality that includes High Availability (HA) database deployments. Era automates and simplifies the operations such as provisioning of databases and copy data management.Era enables you to easily provision database environments (either production or otherwise) on your Nutanix clusters. Also, you can only provision the database server VM that hosts a database, so that you can later create or clone databases on that database server. Era provisioning service includes the following components: Database engines: Custom software images that are tailor-made to enterprise needs.

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M
Nutanix Employee
Sateesh
Nutanix Employee
SateeshNutanix Employee
posted in How It works
Network Segmentation Basics

Objective:Create a virtual/physical separation between different kinds of CVM traffic. Each type of traffic can be on different vLANs (virtual) or a completely different physical switch. Different type of CVM traffic are:Management: Prism, SSH, Rsyslog, SNMP, PE-PC etc. Any communication that requires the default gateway. Backplane: Mainly CVM  CVM communication that happens between cluster services. Host  Host and Host  CVM traffic also comes under this category. Service: This is a user defined traffic type where-in he can choose a particular AOS feature to be separated out of other traffic types. RDMA: This is a type of Service traffic but only limited to Stargate service.Solution Summary:The way to achieve these separations is by creating a new interface (vNIC) on CVMs for each traffic type. By default all the traffic types happen over management interface (eth0) and user can decide to segment other traffic types to new CVM interfaces one at a time. RDMA is a special segmentation ty

52410
Sateesh
Nutanix Employee
Pablo Alejandro
Pablo AlejandroVoyager
asked in Installation & Configuration
4 SFP+ on AHV

Hello,have you guys ever configure a 4 SFP + Nutanix cluster with AHV? i understand that the 4 SFP + will be configured as active-passive in a same bond... but only 1 SFP should be used. There is a better way to configure network on AHV to improve and use the other SFP+??? i mean, for example, separate the traffic between user VMs and CVM (storage traffic)

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Neel Kotak
Nutanix Employee
I
ivanmVoyager
asked in How It works
Can VM uuids be preserved when Leaping to Xi?

Can VMs keep uuid when migrated through Xi Leap and back to original cluster?

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I

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