If you get the following message booting a VMware guest machine : Your CPU does not support long mode. Use 32bit distribution. This mean Virtualization Technology is disabled in the BIOS. Simply enable VT and boot your VM again.
NTFS filesystem store a lot of information that might not be required all the time and can significantly improve the I/O performance when disabled, especially under a virtualized environment. To disable Last Access Time Stamp on Windows, you need to manually edit the registry. 1. Open the registry editor : Start > Run > regedit.exe 2.… Read More »
Running large and high demanding hypervisor connected to SAN storage require jumbo (large MTU) frames to enhance I/O performance to the guests virtual machines. To achieve that, you need to use the command line since vSphere console do not allow to do such thing. 1. Stop all guest virtual machine and put the hypervisor in… Read More »
Migrating Parallels Virtuozzo virtualization software containers from two remote master hardware nodes can’t be done using the hot migrate function included in the control panel. The migration must be done manually for each containers or virtual machines you want to move. Here is a simple procedure how to proceed : 1. You MUST first completely… Read More »
You may encounter this error on VMware ESX / ESXi server on a guest event console (on vSphere Client) : Error message from host.domain.tld: Failed to connect ethernet0 Of course, the guest system have no functional network. This probably happen if you actually rename a Virtual Network that was previously used by the guest. Changes… Read More »
To install VMware Tools from the ESX repository on RedHat/CentOS Linux guests using YUM, you need first to install the public key : rpm –import http://packages.vmware.com/tools/keys/VMWARE-PACKAGING-GPG-RSA-KEY.pub [Updated 06/03/12 : key URL has changed. Old location : http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub)] Now, you need to create the repository file located in /etc/yum.repos.d : vi /etc/yum.repos.d/vmware-tools.repo And then, paste the… Read More »
Got this error trying to adjust time on a VPS from the host node? [root@server ~]# vzctl set 111 –capability sys_timen –save Unable to set capability on running container WARNING: Some of the parameters could not be applied to a running container. Please consider using –setmode option There is two possible solutions : 1. Stop… Read More »
This error occur when the virtual floppy auto install did not unmounted properly. Simply do the following : 1. Shutdown the virtual machine 2. Disconnect the virtual floppy drive or set the drive to use the system floppy instead of image 3. Then, boot you’re guest and try again to install VMware Tools If theses… Read More »
Using VMware Server on RedHat Enterprise Linux, you may expect this error in log file /var/log/secure : PAM unable to dlopen(/lib/security/pam_unix2.so PAM [error: /lib/security/pam_unix2.so: cannot open shared object file: No such file or directory] PAM adding faulty module: /lib/security/pam_unix2.so Actually, this error does not seem to affect the functionality of VMware Server. To work around… Read More »
VMware Server performance can be improved in so many ways… there are some recomendation that I’ve discovered when I was using this product at large before moving them to ESXi : Use preallocated virtual disk Use as less virtual hardware as possible – do not add unneeded hardware Use ext4 or XFS filesystem (if host… Read More »