rghosh8/supportGPT_data huggingface dataset:
### Human: Can you tell about NKE cluster scrubbing failed. ### Assistant: NKE clusters PreUpgradeChecks fail with message "NKE cluster scrubbing failed".. Trying to upgrade Kubernetes or node OS-image might fail during the PreUpgradeChecks phase with the error message:
PreUpgradeChecks: preupgrade checks failed: unable to accept the request. NKE cluster scrubbing failed, check error logs and rectify.
The failing precheck prevents the upgrade from starting. 

 
. Prism Central hosts the Karbon_core service. This service manages NKE clusters and does a scrub operation on all registered NKE clusters when the service starts and/or is restarted. The scrub operations are performed to ensure all NKE cluster nodes are configured properly; for instance, if there are any proxy-related changes on the PE cluster hosting the NKE nodes, the Karbon_core service pushes the new proxy configuration to NKE nodes and services.Scrub operations for a specific NKE cluster might not complete properly or fail for various reasons. For example, if the NKE cluster is not healthy, the error message is logged to karbon_core.log file on PCVM. This log file should be inspected to understand why scrubbing has failed:
nutanix@PCVM:~$ less /home/nutanix/data/logs/karbon_core.out
Note: On a scale-out PC, the "karbon_core.out" log file should be inspected on the Karbon_core leader service.Execute below command to find the NKE/karbon_core service leader on a scaled-out PC deployment:
nutanix@PCVM:~$ less /home/nutanix/data/logs/karbon_core.out
For example, karbon_core service on PCVM "x.x.x.103" is the service leader:

nutanix@PCVM:~$ less /home/nutanix/data/logs/karbon_core.out
Check karbon_core.out log file to see why the scrub operation has failed for the affected NKE cluster.Most of the time, this issue is not noticed until a K8s or OS-Image upgrade is done. This could be a long time since the karbon_core service was last restarted, and the logs would have been rotated already.To resolve this issue and after inspecting karbon_core.out log file for possible causes:

Ensure the NKE cluster is reported as healthy, either in PC WebUI or using karbonctl command from PCVM:	https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Kubernetes-Engine-v2_8:top-clusters-tab-r.html	Or via karbonctl:	https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Kubernetes-Engine-v2_8:top-logon-karbonctl-t.html

	nutanix@PCVM:~$ less /home/nutanix/data/logs/karbon_core.out
	Restart karbon_core service on all PCVMs; wait for 10 minutes till a new scrubbing operation is completed, then retry the upgrade task:	https://portal.nutanix.com/page/documents/details?targetId=Nutanix-Kubernetes-Engine-v2_8:top-service-restart-t.html
If the above does not resolve the issue, contact Nutanix Support, collect Karbon_core logs from Prism Central and attach them to the case for further analysis. See KB-12133 for instructions on how to collect karbon/NKE logs. . ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Changing the IPMI password via ipmitool fails with the "event not found" error. ### Assistant: Changing the IPMI password via ipmitool may fail with the "event not found" error if the password contains special characters like "!".. Changing the IPMI password via ipmitool may fail with the "event not found" error if the password contains special characters like "!".

nutanix@cvm:~$ hostssh ipmitool user set password 2 abcdef!xyz. Special characters like "!" are interpreted by bash resulting in command failures.Use one of the following approaches to resolve this issue:
If using a command with hostssh, enquote the complete command:
	nutanix@cvm:~$: hostssh 'ipmitool user set password 2 <password>'
	When running the command directly on the AHV host, enquote the password:
	nutanix@cvm:~$: hostssh 'ipmitool user set password 2 <password>'
	Changing it using IPMI GUI. Example for Nutanix hardware: Configuration tab -> Users -> Choose User -> Modify.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Connecting the network adapter using ESX command line. ### Assistant: Fixing Virtual Machine network issue from command line.. If a UVM or CVM is powered on but not available on the network via ping or SSH, the network adapter might not be connected.. Use the following commands on the Node to determine if the network adapter is not connected and re-connect if needed.

List all VMs on the Node. Note the VMID of the VM you are trying to reach (in this example VMID 8):
	root@esx# vim-cmd vmsvc/getallvms

	root@esx# vim-cmd vmsvc/getallvms
	Identify the device information. Verify that the network is connected. In this case, it is not.
	root@esx# vim-cmd vmsvc/getallvms
	Find the DEVICEID for the NIC card that is connected to the local Network. In this case the DEVICEID is 4000
	root@esx# vim-cmd vmsvc/getallvms
	From the above command, we can verify that the vNIC is connected = false.  This needs to be fixed, as follows.
	root@esx# vim-cmd vmsvc/getallvms
	where Z is true (1; enable) or false (0; disable

	For example:	Enable the network:

	root@esx# vim-cmd vmsvc/getallvms

	Disable the network:

	root@esx# vim-cmd vmsvc/getallvms
	. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about VM operations may fail with "Invalid timezone: US/Pacific-New" error on AHV clusters after upgrading AOS to 5.15.5, 5.19.0.5, or newer. ### Assistant: VM operations may fail with "Invalid timezone: US/Pacific-New" error on AHV clusters after upgrading AOS to 5.15.5, 5.19.0.5, or newer. The following operations may fail with the "Invalid timezone: US/Pacific-New" error on AHV clusters after upgrading AOS to 5.15.5, 5.19.0.5, or newer.
VM cloning.Changing VM settings (except changing timezone).Restore from the protection domain.Restore from VM snapshot.Creation of new VMs with Pacific-New timezone.
Sample events from /home/nutanix/data/logs/uhura.out:

2021-12-08 14:08:01,434Z ERROR vm_register.py:535 Failed to register VM. Error code: kUnknownError
To confirm that VM is affected, check "Timezone" in the VM properties in Prism UI.Alternatively, you can run the following command on any CVM in the cluster:
2021-12-08 14:08:01,434Z ERROR vm_register.py:535 Failed to register VM. Error code: kUnknownError
Sample output:

2021-12-08 14:08:01,434Z ERROR vm_register.py:535 Failed to register VM. Error code: kUnknownError. The Linux community has deprecated the "US/Pacific-New" timezone, and hence it was removed from CVM starting from 5.15.5, 5.19.0.5. As a result, if any VMs were using this timezone and VM snapshots or protection domain snapshots were created before an AOS upgrade, then post-upgrade symptoms described above may be experienced.Perform the following actions to fully resolve this issue.VMs that are currently using the "US/Pacific-New" timezoneChange the timezone to a different one. This action can be done via Prism UI or acli. After that, all VM operations should continue to work.Sample acli command:
nutanix@cvm:~$ acli vm.update <vm_name> hwclock_timezone=<timezone>
VMs that fail to be restored from VM or protection domain snapshotsStarting from AOS 5.20.4, and AOS 6.1.1 DR workflows are not validating timezone configuration and as a result, VM restore from the protection domain is allowed. No changes are done to restore from the VM snapshot workflow.Perform the following steps on all CVMs in the cluster:
Copy Pacific to Pacific-New timezone file:
	nutanix@cvm:~$ acli vm.update <vm_name> hwclock_timezone=<timezone>
	Update permissions:
	nutanix@cvm:~$ acli vm.update <vm_name> hwclock_timezone=<timezone>
	Once restore is completed, update the timezone of restored VMs and remove created files:
	nutanix@cvm:~$ acli vm.update <vm_name> hwclock_timezone=<timezone>
	. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about VMs do not automatically restart if an AHV host crashed while entering maintenance mode. ### Assistant: If an HA event happens during the process of entering maintenance mode, the VMs that should be restarted on other hosts will remain turned off. If an HA event happens on the host during the process of entering the same host into maintenance mode, the VMs that should be restarted on other hosts will remain turned off. To confirm the issue the acropolis.out log can be checked on the node that was the acropolis leader at that time of the crash. 
Compare the output from the time (edit the correct year-month-day) before the crash with the UUID from ncli host ls.  

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'

NOTE: Dependent on the AOS version the time is in UTC (AOS 5.20 and above) while older versions are in a local cluster time zone
The issue happens because the segment timestamp value is getting increased first as part of the migration process during entering the maintenance mode, but because the migration fails the HA process increases this value again. That results in incrementing the value twice and creating a mismatch leading the VM start task to fail. Such VMs will remain in the shutdown state.
Below the sequence of events can be found:

The VM migration starts for a VM as part of the maintenance mode request:

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'

But because the host crashed, the migration task fails:

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'

The VMForcePowerOff task is initiated as part of the HA process:

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'

Later as part of the HA process, the VM is attempted to be started on another host:

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'

But the VM start process fails because the segment timestamp value does not match the requested value:

nutanix@CVM:~$ allssh "zgrep 'Current master is'  /home/nutanix/data/logs/acropolis.out*" | grep 'YYYY-MM-DD'. This issue is resolved in:

AOS 6.x family (STS): AOS 6.1.1

Please upgrade AOS to versions specified above or newer.Workaround
The affected VMs should be started manually either via PRISM or acli.

 . ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Intel X710 10G embedded LLDP agent dropping LLDP packets before they reach Linux kernel. ### Assistant: Intel X710 10G embedded LLDP agent dropping LLDP packets before they reach Linux kernel. Some Intel cards, including Intel X710 have an embedded LLDP agent that blocks LLDP packets before they can reach the kernel. This implies that the tcpdump will not show any in or out packets. Also, the stats will remain at 0 in AHV lldpcli although we send LLDP frames to the switch, nothing is received as these frames are dropped at the NIC driver level. 
Check NIC type:

[root@ahv ~]#  lspci -nn | grep -i 'Ethernet Controller'
 

Use lldpcli to check statistics:

[root@ahv ~]#  lspci -nn | grep -i 'Ethernet Controller'. AHVThis issue is resolved in AHV 20170830.265, which is bundled with AOS 5.10.3.2. Please consider upgrading AHV to the latest version to resolve this issue.ESXiThe latest native driver (i40en 1.5.6) and the latest firmware (6.0.1) provide a method to disable it on ESXi only by passing a parameter to the driver module.To view the Intel system module parameters currently in place, run either of the following commands from the host:
esxcli system module parameters list -m i40en

To change the Intel system module parameter for LLDP, run the following command

esxcli system module parameters list -m i40en

Reboot the ESX/ESXi host for the configuration change to take effect.For Intel card type XXV710 specifically, the firmware needs to be upgraded to version 8.50See KB-13085 for additional references for XXV710 NICs.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Prism stats not shown when ESXi SR-IOV NIC is used on VMs. ### Assistant: CPU and Memory stats not shown on Prism for ESXi hosts when VMs on them use SR-IOV NIC. Single Root I/O Virtualization (SR-IOV) NIC adapter is supported from VMware vSphere 5.X onward. In General, the SR-IOV adapter is used for VMs that are latency sensitive or require more CPU resources, but AOS doesn't support the NIC adapter type. Due to this, the Prism will not show CPU and Memory usage statistics for VMs with SR-IOV NIC adapter(s) running on ESXi hosts.Prism will not show CPU and Memory usage statistics for ESXi hosts when one or more VMs on these hosts are using SR-IOV NIC(s).One or more VM stats are not shown on Prism . This issue is resolved in:
AOS 5.20.X family (LTS): AOS 5.20.3AOS 6.0.X family (STS): AOS 6.1.1
Please upgrade AOS to versions specified above or newer.Apart from the Prism stats not being available (as shown above), no other issues are seen with functionality.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Windows installation fails with "No signed device drivers were found" error. ### Assistant: Windows installation fails with "No signed device drivers were found" error if incompatible drivers are selected.. While trying to load storage controller drivers during the installation of Windows on AHV following error message might be displayed:
No signed device drivers were found. Make sure that the installation media contains the correct drivers, and then click OK.

 
. This issue may happen if the wrong folder with drivers was selected. For example:
Folder with OS name was selected (Windows Server 2016 for example). Please make sure to select one of the folders inside the directory with OS name, that represent OS architecture (amd64 in case of Windows Server 2016).x86 folder was selected while you are installing a 64-bit operating system. Or vice-versa.
Note: x86 folder is no longer included in VirtIO ISO package from Nutanix VirtIO 1.1.6 and above.Sample folder structure with amd64 folder highlighted:Only drivers from amd64 folder should be used starting from Windows Server 2008 R2 as only 64-bit editions of server operating systems are released by Microsoft. . ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about VirtIO drivers may be removed after OS generalization (sysprep). ### Assistant: Sysprep tool may remove Nutanix VirtIO drivers from OS during generalization/customization process. After generalizing Windows Server 2012 R2 VM by using sysprep tool for creating VM template, latest VirtIO drivers may be removed from the VM and an older version is used. The behavior was noticed with NetKVM driver but can occur with any VirtIO driver.

Check the version of device driver version inside the guest OS from the property information. And verify the driver version included in Nutanix VirtIO Driver.Installed device driver version (driver date) might be older than expected version installed with Nutanix VirtIO Driver.See KB 5491 for the matrix of Nutanix VirtIO package versions and the driver version of each component.Sample screenshot of driver properties

. Workaround 

Install the latest Nutanix VirtIO driver again on each deployed VM, orCreate a template VM image by generalization without removing installed device driver.

Generalizing VM image without removing the device driver

Sysprep may generalize VM image with maintaining driver configuration by adding Microsoft-Windows-PnpSysprep/PersistAllDeviceInstalls setting in Sysprep Answer File (XML).The following article explains the instructions in detail:

Maintain Driver Configurations when Capturing a Windows ImageOther References:

Windows ADK (Windows Assessment and Deployment Kit) (Download page)Windows System Image Manager tool is required for authoring Sysprep Answer File which is packaged in Windows ADK.See Installing the Windows ADK (Instruction).. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about AOS upgrade - Failed to run the update SVM vmx script - CVM boot ISO not Mounted. ### Assistant: AOS upgrade failed with error Failed to run the update SVM vmx script because CVM boot ISO is not mounted.. AOS upgrade failed with error Failed to run the update SVM vmx script because CVM boot ISO is not mounted.Symptoms

The following errors are observed in the log file /home/nutanix/data/logs/finish.out on the CVM being upgraded:

	2015-05-25 21:37:04 INFO genesis_utils.py:655 Running auto-backup script on esx host
	Identify the CVM being upgraded:
	2015-05-25 21:37:04 INFO genesis_utils.py:655 Running auto-backup script on esx host
	NCC check cvm_startup_dependency_check fails with the following error:
	2015-05-25 21:37:04 INFO genesis_utils.py:655 Running auto-backup script on esx host
	
​. The script cannot fetch the attribute "fileName" because the CVM boot image ISO is detached from CVM on the ESXi host. You have the following options to verify:

Login to vSphere client > Hosts and Clusters > Select the cluster > Select CVM being upgraded > Edit settings.	Login to the respective ESXi host over SSH and run the following command.
	[root@ESXi-node-1:~] cat /vmfs/volumes/NTNX*/ServiceVM_Centos/ServiceVM_Centos.vmx | grep ide
		Example output:
	[root@ESXi-node-1:~] cat /vmfs/volumes/NTNX*/ServiceVM_Centos/ServiceVM_Centos.vmx | grep ide
	Manually connect ServiceVM_Centos.iso from vSphere client (compare the VM settings with another CVM in the cluster):	The upgrade will continue as soon as the ISO file is mounted to the CVM.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about Physical-to-Virtual (P2V) migration to AHV. ### Assistant: Nutanix does not offer tools to perform Physical-to-Virtual (P2V) migration to AHV.. Nutanix does not offer tools to perform Physical-to-Virtual (P2V) migration to AHV.. Please use partner solutions to perform Physical-to-Virtual (P2V) migrations. A list of Nutanix Ready Solutions can be found here.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about ESXi - How to recreate Standard Switch configuration via ESXi command line. ### Assistant: This article describes how to recreate the vSwitch0 and vSwitchNutanix configuration from the ESXi command line.. There have been a few instances when migrating to and from Distributed vSwitch can cause the Nutanix vSwitch to be deleted or have the wrong configuration. This will cause the Genesis service on the cluster to crash and not start.Follow the steps mentioned in this article to create a standard Nutanix vSwitch from the ESXi command line. . Recreating the ESXi Nutanix Switch from scratchPerform the following steps to recreate the ESXi Nutanix Switch from scratch:

Create standard vSwitches vSwitch0 and vSwitchNutanix.

	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Create Port Groups Management Network and VM Network on vSwitch0.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Change the VLAN ID on a portgroup.
	~# esxcfg-vswitch -p "portgroup_name" -v VLAN_ID virtual_switch_name
	Create Port Groups vmk-svm-iscsi-pg and svm-iscsi-pg on vSwitchNutanix.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Create VMkernel Port vmk0 for vSwitch0 and assign to VMkernel Port Group Management Network.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Create VMkernel Port vmk1 for vSwitchNutanix and assign to VMkernel Port Group vmk-svm-iscsi-pg.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Assign default gateway to ESXi.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Check that the vmknics are created.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Check to which vmnics the two 10GbE ethernet ports are assigned.
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	Assign the two 10GbE uplinks to vSwitch0 (In this example, vmnic0 and vmnic1).
	~# esxcli network vswitch standard add --vswitch-name=vSwitch0
	

An example of the correct configuration of vSwitchNutanix:

~# esxcli network vswitch standard add --vswitch-name=vSwitch0

Note that the changed port group naming with Foundation 5.0 and newer:The old naming for the portgroups attached to the internal switch can be seen below:

~# esxcli network vswitch standard add --vswitch-name=vSwitch0
With Foundation 5.0 and newer, a new naming has been introduced (ref KB-11895):

~# esxcli network vswitch standard add --vswitch-name=vSwitch0
Ensure that the following information matches:

No uplink interfacesThree used ports Port groups and # of used portsName of the vSwitch

Checking the CVM network configuration in vCenter

Verify that eth0 (Network Adaptor 1) is part of the VM Network Port Group.Verify that eth1 (Network Adaptor 2) is part of svm-iscsi-pg.. ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.
### Human: Can you tell about NCC Health Check: ergon_checks. ### Assistant: NCC 4.0.1. The NCC health check ergon_checks verifies a number of pending tasks and fails if a high number of tasks detected in the cluster.. The NCC health check ergon_checks verifies a number of pending tasks and fails if a high number of tasks detected in the cluster.Running NCC Check
You can run this check as a part of the complete NCC health checks 
	nutanix@cvm:~$ ncc health_checks run_all
	Or you can run this check individually 
	nutanix@cvm:~$ ncc health_checks run_all
	
Sample Output

Check Status: PASS

nutanix@cvm:~$ ncc health_checks run_all
Check Status: FAIL

nutanix@cvm:~$ ncc health_checks run_all
Check fails if more than 50000 tasks are found on the Prism Element cluster or if more than 400000 tasks are found on the Prism Central cluster.This check runs on all hypervisors.This check is not scheduled.This check runs on Prism Element and Prism Central.This check does not generate an alert.Output messaging

Check ID111082DescriptionHigh number of tasks in the cluster.Causes of failureHigh number of tasks in the cluster.ResolutionsContact Nutanix support for help.ImpactOperation on entities in the cluster might not progress..  Please collect the log bundle using Logbay and engage Nutanix Support at https://portal.nutanix.com/. For more information on how to use Logbay, see KB 6691. . ### Human: Now explain this as a Nutanix support agent summarizing the answer step by step. In case, you don't know the answer say - I don't know.