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Showing posts from September, 2018

Oracle Linux VM unable to boot after P2V conversion.

Recently, I was having issue where I had decided to migrate one of my Oracle Linux machine which was running in HP Blade server to visualize and migrated through VMware converter. Migration went successful and VM migrated successfully without any error but while powering on the Oracle Linux VM its failed with below error. To resolve this issue I tried to boot the VM with Linix iso and run into rescue mode. Please find below steps which I followed to boot the VM successfully. 1)      Mount the linux iso to the VM and boot it from CD 2)      At the first prompt, type linux rescue and press Enter. 3)      Change root to the mounted installation. Type chroot /mnt/sysimage and press Enter 4)      Type   ls /boot 5)      There you will see lots of initrd-xxxxx.EL.img files with different name. 6)      To verify the correct initrd-file used to /boot. Type cat /etc/grub.conf, and press Enter. 7)      From the location /etc/grub.conf I found there are t

Total Logon Time metric display "No Data" in vRops for Horizon dashboard

Last week I was working with one of my customer who has recently upgraded their vRops environment to 6.7 version.  Their environment consist of  VDI environment running on VMware Horizon. Here in vRops environment they have default Horizon dashboard as they have configured Horizon adapter for their VDI environment. From some time we are getting issue into Horizon dashboard where they were not able to see Total Logon Time metric display where its display "No Data" as seen below To resolve the issue of " No Data" there is a solution which works for me and recommended by VMware. This issue identified when we not enable the time profiler. The logon time is calculated by 'First_idletime - logon_starttime' The 'logon_starttime' is retrieved from DB and 'first_idletime' is retrieved from DA (Desktop agent). Its because the DB is not consistent with DA. This will cause the "logon_startime" be sm

Issue with VMware Tools 10.3.0

There is an issue identified with VMware Tools 10.3.0 release that can cause the ESXi host to PSOD. Multiple issues, including the PSOD,  have been brought in attention with the VMXNET3 driver that shipped with the VMware Tools 10.3.0 release. In response to this, VMware is puling this release from availability through myVMware. In order to be exposed to these issues, all of the following must be true: ·        Windows 8/Windows Server 2012 or higher ·        VMXNET3 network adapters in the VM hardware configuration ·        VM Hardware version 13 ·        ESXi 6.5 hosts ·        VMware Tools 10.3.0 installed ·        VMware Tools 10.3.0 includes the applicable VMXNET3 driver version. ·        The problematic VMXNET3 driver is version 1.8.3.0 VMware been made aware of issues with the VMXNET3 driver released in VMware Tools 10.3.0, and that we recommend downgrading to VMware Tools 10.2.5 for the configurations outlined above. You may also refere

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Changing the FQDN of the vCenter appliance (VCSA)

This article states how to change the system name or the FQDN of the vCenter appliance 6.x You may not find any way to change the FQDN from the vCenter GUI either from VAMI page of from webclient as the option to change the hostname always be greyed out. Now the option left is from the command line of VCSA appliance. Below steps will make it possible to change the FQDN of the VCSA from the command line. Access the VCSA from console or from Putty session. Login with root permission Use above command in the command prompt of VCSA : /opt/vmware/share/vami/vami_config_net Opt for option 3 (Hostname) Change the hostname to new name Reboot the VCSA appliance.   After reboot you will be successfully manage to change the FQDN of the VCSA . Note: Above step is unsupported by VMware and may impact your SSL certificate and face problem while logging to vSphere Web Client. If you are using self-signed certificate, you can regenerate the certificate with the

VM Creation Date & Time from Powercli

Most of the times we have several requirement when we talk about IT environment like designing , deployment , compliance check or for Security auditing the environment. Somewhere during security auditing we require to provide several information to security team to get successful audit. One of them is the compliance of Virtual machine auditing of creation date and time. Here into this post we will explore how to get the creation date and time of virtual machine hosted into the vCenter or ESXi. To get the details we will use VMware Powercli to extract the details. By default there is no function added into Powercli to get such details, so here we will add a function of vm creation date. Below is the function which needed to be copy and paste into the Powercli. ======================================================================= function  Get-VMCreationTime  {     $vms  =  get-vm     $vmevts  = @()     $vmevt  =  new-object  PSObject     for

Unable to poweron the VM. (Failed to lock the file)

I have encountered may issues like where after some upgrade or migration we were unable to power on the VM. Figure 1 An error was received from the ESX host while powering on VM HSSVSQL01. Failed to start the virtual machine. Cannot open the disk '/vmfs/volumes/578d835c-18b2c97a-9b0d-0025b5f13920/SAMPLE1_cloud/000000.vmdk' or one of the snapshot disks it depends on. Failed to lock the file In above Figure:1, where while powering on the VM, its prompt for an error. Well, there are several reason for where the VM unable to poweron and you can find many article on this. Here in this article we will discuss to resolve this issue. Please use below step to resolve the disk lock issue  C hecked that VM is running on snapshot if its getting error " VM Consolidation required". Checked the snapshot manager if its showing any snapshot. If yes, try to delete the  snapshot. Verified the same from Esxi cl