CentOS 5 Server :: Update Kernel In Xen Virtual Machine
Jun 20, 2010
I installed the Centos 5.5 with XEN and put 03 virtual machines (Centos 5.5 too). I did this correctly, but I have a problem. In the virtual machine, I need update the kernel. I used "yum update kernel" and this is downloaded correctly and the menu.lst file is updated too, but the kernel not ran. I ran "grub-install /dev/sda" or "grub-install /dev/xvda" and received a error return. I read the device.map file and i ran "grub-install /dev/sde" and received a error return too.
The errors:
[root@vm01 ~]# grub-install /dev/sda
/dev/sda: Not found or not a block device.
[root@vm01 ~]# grub-install /dev/sde
/dev/sda1 does not have any corresponding BIOS drive.
[root@vm01 ~]# grub-install /dev/xvda
/dev/xvda: Not found or not a block device.
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May 27, 2010
I have installed CentOS on a VMwareWorktation and that CentOS, i also install VMware Server (suscess) and setup a guest OS that, but i start this Guest OS, an error show "You may not power virtual machine in virtual machine"...
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Apr 7, 2011
I need start a virtual machine (Virtual Box) when when my server centos is turned on or start.
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Aug 25, 2010
I'm running CentOS 5.5 x64 and have just installed VMWare Server 1. I am able to create a new Virtual Machine, but when I go to power on the VM in order to install the OS (windows server 2003), either the host crashes/reboots (with "Run in Debugging Mode" turned on) or the VM simply does not start (with that Debugging box unchecked) and in the log there is an error along the lines of VMware Server unrecoverable error (vmx)
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May 18, 2010
I'm trying to set up a virtual machine environment in Centos5.5. My hardware fully supports virtualization, and I'm running qemu as the hypervisor with Virtual Machine Manager as the GUI to manage and create VMs. Host hardware is a Dell PowerEdge T710, with a quad core Xenon processor and four 1TB disks in a raid 6 array.
Within the Virtual Machine Manager when trying to create a new VM, there is the option to not "allocate entire virtual disk now". What format is created when you "allocate entire virtual disk now" and when you don't?
I want to create a qcow2 image format, but it doesn't look like it is supported. Does anybody know how to create a VM with a qcow2 image format?
When you create a blank disk with "qemu-img create -f qcow2 disk.qcow2 3700G", it indeed does create a qcow2 image. However, Virtual Machine Manager is unable to read these images, claiming that it is 15 megs or so in size (which is what it actually occupies in host disk space until you try and put a VM into it).
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Nov 14, 2009
I have Linux server with VMware Server 1.0.8. When I creating a virtual machine, I can not "send" a PING to the virtual machine. In the virtual machine, I have installed CentOS 5.3 (32bit). In the virtual machine I have defined the addresses IP. So, whey I can't "sent" a ping to the virtual machie? I have to set something on the Linux server?
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May 21, 2009
I have centos 5.3 workin on mini itx atom 330. i have some problem with the network when i use Samba. when i move big files the network goes down. i wanna to install the new kernel on my centos to try to fix the network problem with the new drivers includes on the new kernel.
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May 31, 2011
I'm just trying to know if is there is a way to run the first version of linux in a virtual machine. Since I am very new to this, my aim is to learn something basic on how the first version of linux kernel was built and worked.
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Mar 31, 2011
how to make virtual machine using xen kernel and nfs.
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Jun 9, 2011
I'm Redhat 5 user, and I want to implement Kernel-based Virtual Machine. I tried too much search in google but I cant find the perfect instruction regarding it.
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Aug 28, 2009
I'm using Cpanel on my server, before upgrade to new kernel, i could see 8 cores on my i7 server, now i only see 4 cores, is there anything that i need to do to have another time the 8 cores?
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Jun 16, 2009
I want to add more than one Virtual IP to my CentOS machine. I was able to add one ver easily by creating a file ifcfg-eth0:1 and editing the IPADDR field. But I cannot create more by creating a ifcfg:eth0:2, for example.
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Nov 11, 2010
Which virtual machine in Red Hat now pushing (championing)? And is it supported on CentOS yet? Does it support multiple cores in the guest and does it take advantage of hardware visualization?
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Jan 21, 2011
Where can i download an image file of centos for running it in wmware ?
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May 23, 2011
we are going to implement a virtual environment and I would like to install freenx on a virtual machine.
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Apr 29, 2009
I am newbie to centos. I am trying to install virtual server in my machine. I have installed the Xen virtual machine monitor which comes with CentOS through add/remove software. Here is the problem, I am unable to open connection with Xen hypervisor. Here is the error i am facing:
Unable to open a connection to the Xen hypervisor/daemon. code...
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Jan 3, 2011
I had set up 4 virtual machines on centos 5.5 system where I directed the image locations to an external storage. I have lost the image files in the storage, but I have the image files that were copied from the virtual machine image location. I want to put up the same system on the same computer by copying these backup images. However, when I copy the image file to the same exact location and start the corresponding virtual machine I get "no bootable disk" error. When I increase the size of the image using "qemu-img" commands, I can get rid of this error, but get "error reading disk" error. Is there a way to overcome these problems, or is it not possible to restore a virtual machine by copying the machine image file under ..../xen/images?
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May 12, 2011
I am encountering some problems regarding CentOS 5 and I am going to kindly ask your help in debugging further what is happening. I will give as much information as possible about the setup. Here we go. We use on one server of our servers, GOautodial, an inbound/outbound call center application, that it's installed on a CentOS 5.5 (Final).
# cat /etc/*release*
cat: /etc/lsb-release.d: Is a directory
CentOS release 5.5 (Final)
GoAutoDial CE 2.0
# uname -a
Linux xxxxx.com 2.6.18-194.8.1.el5.goPAE #1 SMP Fri Jul 30 05:30:57 EDT 2010 i686 i686 i386 GNU/Linux
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Nov 22, 2010
I want to create a virtual host and virtual ip in proftpd linux centos. can anyone please help me on this,I'm new in linux.
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Mar 10, 2009
Running Fedora 10, I installed CentOS 5 in Virtualbox, but I can't ping the Virtual Machine...
From within CentOS, I can ping my laptop [known as the host?] but from the laptop I can't ping the CentOS Virtual Machine. I tried turning off the firewall on both too... CentOS was able to access the internet through my laptop right away without any configurations too.
Unless someone has an idea to resolve the above, I am also wondering about something else VirtualBox-related:
To see if it was possible to get around the above issue, I was going to install another CentOS virtual machine to see if I can get them to communicate both ways [if at all], but to do so, I think I have to install CentOS AGAIN on another allocated amount of hard disk space. This will take some time, so I was wondering if anyone knew if it was possible to just create a quick duplicate of the previous installation, if you wanted 2 different virtual installations of the same OS.
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Oct 25, 2010
I have checked the known issues and the sticky post, it does not seem to be related. I have Ubuntu as my host OS and I want to run Windows as a guest.
Now, Here is the error:
Quote:
Kernel driver not installed (rc=-190
The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall the kernel module by executing
'/etc/init.d/vboxdrv setup'
as root. Users of Ubuntu, Fedora or Mandriva should install the DKMS package first. This package keeps track of Linux kernel changes and recompiles the vboxdrv kernel module if necessary. I have done the obvious:
Quote:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install dkms
sudo /etc/init.d/vboxdrv setup
I still have the same error. I just updated from Ubuntu 10.04 to 10.10, then I was prompted by virtual box to update to the newest version, then this happened.
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Jan 24, 2011
I'm Rebuilding all the servers in the company I work for. I read anything I found about best practices in virtualizing, but I didn't find anything about virtualizing Apache. As MySQl is not considered to be virtualized as a best practice but to be on a separate machine - my question is "Do I virtualize an Apache server or put it on another real machine?". And also I'm going to put the server on Ubuntu!
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Jul 22, 2010
I have CentOS 5.5 and try to create KVM virtual machine with CentOS 5.5 as a guest. But when I exec command:
virt-install --connect qemu:///system --name test --ram 1024 --file=/var/lib/libvirt/images/test.img --file-size=10 --vnc --cdrom=/var/lib/libvirt/images/CentOS-5.5-x86_64-bin-DVD-1of2.iso --vncport=10000 --accelerate --os-type=linux --nonsparse --livecd --hvm
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May 28, 2009
I keep getting things like code...
but i already do
yum groupinstall "Development Tools"
yum install kernel-devel
commands.
I just reinstall my centos, and in the previous installation I used the virtual box without problems. that is giving wrong this time?
(i had tried the .run installer and the rpm installer but all lead the same.)
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Sep 27, 2009
after update to kernel-2.6.18-164.el5 one of the 2 NIC's of my machine are only found at 1 of 4 reboots. Using the old one kernel-2.6.18-128.7.1.el5 all is fine. This are the to NIC's:
00:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
00:0b.0 Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0c)
And the Intel one, makes the problems with the new kernel.
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May 29, 2010
The server runs# uname -r2.6.18-128.4.1.el5However, today I executed yum update kernel*due to security advisory. I was just about to reboot the system when I realized that it runs VMWare Server Instance that will most likely fail to restart after kernel upgrade (I had a hard time fixing it after previous kernel update). Now I want to keep 2.6.18-128.4.1.el5 after reboot.I see that new kernel is scheduled for booting:
# cat /etc/grub.conf
default=0
timeout=20
[code]....
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Sep 25, 2010
I was doing a kernel update and can no longer boot into 11.3. I am dual booting with XP. I get Grub screen but no longer see Suse as a boot option, only Windows. I have tried to reinstall, but for some reason I can't get it to boot with DVD. So, is there a way that I can repair my computer without doing a reinstall?
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Aug 15, 2010
Today when I logged into my fileserver it told me there were 20 updates available. I went ahead and installed them, one was a new kernel. After reboot, I cannot see that machine when I browse the network. It still has the same static IP and I can still map to the shared drives, so Samba is working. When I browse the network from Windows or my WDTV Live media play it no longer shows the server by name. The smb.conf file is still intact and I restarted Samba. Not really sure where to start troubleshooting why I can't browse to it.
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Jan 29, 2010
Since a few weeks I cannot open a console in vmware server 2.0.2 anymore. I don't know exactly when this started because I use vmware only occasionally (I have only 1 program (an old Ashlar DrawingBoard) which does not run properly in wine). VMware server and the console have been working before without problems, but now I get the message "Cannot connect virtual machine console." and it times out. This is on Opensuse 11.1 with VMware Server on the same pc, Firefox and the guest is Windows2000.
I have tried to disable all extensions in firefox 3.6, disabled the firewall, even created a new user (on the same pc) with a clean firefox, all without any result. However when I connect from a different computer which runs Internet Explorer under windowsXP, then I can get the console without problem.
So, somewhere there is something wrong between Firefox and VMware server.
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Jun 2, 2010
I setup a private network from virtual machines and one of the machines is the DHCP server for the group. I want to specify a next-server for the DHCP server but I'm having trouble connecting to any of the machines that I lease IPs to. I'm just trying to do a simple ping/ssh to 10.0.0.252 (a machine with a lease) but it doesn't seem to respond. I'm assuming I need to be able to connect to my next-server but maybe I'm wrong.
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