CentOS 5 :: Virtualization: Dual Boot Xen And Ordinary Kernel?
Sep 1, 2010
If you select "support virtualization" during install, you get the xen kernel installed.
Some things do not work with this kernel (e.g. nVidia drivers). So my question is whether it is possible to install both kernels (xen and ordinary) and select between them with grub at boot time?
I did try this a while ago, by first installing with xen and then manualy adding the ordinary kernel, but the ordinary kernel failed to boot (for reasons I don't now recall - sorry). Clearly, there must be differences in the "virtualization" build other than the kernel.
The alternative, if I want to play with virtualization, would be to have two entirely separate installations, but this seems like a waste of space when surely almost everything must be identical?
I can't find anything in the Centos Xen documentation about this.
Before I try again I would just like to check if anyone actually knows if this is possible, or if not why not?
One of the things holding me back from building a new system with nothing but Linux is the vague possibility that that I might need to use some proprietary program that only works on Wind'ohs in the future. So far it has been easy to keep dual boot systems around, but a new system will be > 4 Gb of RAM of course, so I can't just install one of my copies of Win XP on it. But buying a new 64-bit version of Wind'ohs for ~$200 seems a waste.Is it now possible to run XP in a "virtual" machine under Debian? More importantly, is it possible to install XP completely from within the virtual machine so it never sees the > 4 Gb or RAM and freaks out? What sort of hardware is required to do something like this? I presume a CPU with certain special capabilities is essential, but wouldn't those special instructions (whatever they are) be pretty standard now? Would the virtual XP install need its own partition?
i installed ubuntu using wubi and so far i have been impressed. I quickly filled up the small size i allocated for the ubuntu installation in wubi and now find myself in quite a predicament. I was thinking of performing a clean install of ubuntu and removing the existing windows installation. Rather than dual booting, i was using virtual box to run a windows xp machine so that i could use common windows applications. However, i was having some problems running some applications in the virtual box.
it was possible to install ubuntu and windows on the same hardrive with the ability to boot into either/or, but also be able to run the same windows installation inside a virtualization program in ubuntu? The majority of the windows programs worked fine in the virtual box, but some of the applications didnt. Is there any software out there that can do this?
I was wondering if anyone can assist me. I am looking to build a server with Debian as the host. When I installed Debian (Squeeze) the default kernel was "2.6.32-3-trunk-amd64". When I tried to install 'Virtualbox' application, I got a failure because I didn't have the 'kernel-headers' installed on my machine. I noticed there are no specific header package the 'trunk' kernel I was using. I have a few questions so I guess I should begin:
Is it safe to remove the 'trunk' kernel and boot my system on just the regular 2.6.32-3-amd64 kernel? Is this OK or not recommended? Please explain whatever is the correct answer. This is my 1st time using a 'Trunk' kernel so I don't know the in's and out's of it.
If I am using Debian 'Testing' for virtualization via 'Vbox', is there a specific kernel I "should" be using?
I installed the latest version of Centos 5.4.It came with Xen version 3.0.2 I think.I am running it on a Dell R510. It supports hardware virtualization.I was able to virtualize Windows XP and Windows 2003 server on it by selecting the install from DVD option.I was having problems trying to get a PCI DekTek card seen by the virtualized Windows domains so I tried to upgrade XEN to 3.4.2.I used the repos available from Gitmo and it went easy.
The only problem is now that when I try to create a "New virtual host" it only allows me to use HTTP, FTP option and not the iso or DVD option. They are greyed out. I was wondering if anyone has had this problem and might know a work around for the Xen 3.4.2 problem. Perhaps a better location for the kernel or something.
I compiled my kernel, compiled scsi support into kernel, used the new kernel and initrd, the boot failed.Then ,i unzip my initrd, found that sd_mod.ko can't be insert, i added it manual, and reboot OK.so, why! in the kernel configure , the sd_mod.ko is set to <M> , but why it can't be found in initrd?
3 partitions (in order): Windows 7, CentOS and shared data partition.
I need to increase the size of the Windows 7 partition (c:windowswinsxs seems to be something not easily remedied).
GParted didn't work in moving things around (bad sector) so I wiped out its partition (# 2 out of 3) and I was able to increase the size of the Windows 7 partition (I can reinstall CentOS easily and not much work lost).
Except ... no more grub menu (unsurprising). This incantation does allow me to boot into Windows 7.
Is there any way of rebuilding the grub menu short of reinstalling CentOS (5.5)?
I have a laptop that came with Windows Vista (64-bit) installed. I created a new partition and installed XP (also 64-bit) alongside it.Last night I shrunk my XP partition and created another new partition and installed Linux (CentOS 64-bit) on it. I made an error in judgment and didn't allocate enough space, so I need about 10 more gigs for the Linux partition. It boots up and runs, but I need about 10 more gigs of storage for the files I want to keep on the partition (and yes, they have to be on the partition, I definitely need to know how to do this, not a workaround)I went into Vista and shrunk the XP partition by 10 gigs, so now I have 10 gigs of free, non-partitioned space.
As it stands, when I start up the computer I get the GRUB boot loader. I can boot my Linux install or choose "Other" and be taken to the Vista boot loader. From there I can choose XP or Vista to boot.So, my question is... what is the best way to append the 10 gigs of free space to the Linux partition? Is this something I should do inside of Linux? I have the option to do it in Vista, but the partition shows up as "healthy" but without a file system type.I just don't want to screw up the boot loader, partitions or anything else.This isn't my area of expertise, so if anyone could give me a good suggestion or solid answer
i'm a familiar with Linux environement ( fedora 10 user ) and i got a project in a training where i have to create a cluster with two nodes where i have to set up a number of VMs that will run applications such as ( Samba, Ldap, Zimbra, ...) but i don't know how to virtualize on top of a cluster ! i would like to know how that can be done, and how is it possible to let the VMs get ressources ( RAM & CPU ) from the two nodes ??
I chose virtualization when installing Centos 5.3. The kernel I got is 2.6.18-128.el5xen My plan is to use KVM, I disable xend service. I don't need a xen enabled kernel. How do I update the kernel to a non xen one?
I have a customer who has (currently) three servers running Centos 5.5, one running Windoze 2003 and around thirty or so workstations running XP Pro.
I've just been reading about RedHat's product - RHEVD and was wondering of anyone knows if this product (or anything similar) is aavailable under CentOS.
Basically what we need to be able to do is to virtualize the XP workstations so that the staff can connect via a browser (inside the office or off-site - or for that matter anywhere) and be presented with a standard desktop.
I know I can achieve this using Citrix XenDesktop or VMWare View but I would prefer to use a FOSS solution if one exists. Having said that it has to be robust and well past Beta
I am trying to figure out how to get an almost bare metal virtualization running, and having a hard time getting it going I tryied the Virtual Machine manager, but it wont let me do full virtualization.
I have centos 5.3 with text console onl, not X server, now I try install solaris 10 at xen with full virtualization (hvm)
Now I have some like "zombie domain"
How I can to kill this? If I reboot the server it doesn't help.
No fonts found; this probably means that the fontconfig library is not correctly configured. You may need to edit the fonts.conf configuration file. More information about fontconfig can be found in the fontconfig(3) manual page and on [url] Domain installation does not appear to have been successful. If it was, you can restart your domain by running 'virsh start solhvm123'; otherwise, please restart your installation.
Do you know what this a problem?
If I chagne --vnc to --sdl and run below command on my desktop to appear windows and disappear for 1-3 seconds, virt-install -n solekhvm3 --ram 1024 --hvm --disk path=/dev/vol1/solek --sdl --cdrom /dev/cdrom --os-variant solaris10 --force
The word on all lips are "virtualization" so I decided to smell this flavor. I have a machine running CentOS 5.3 64bit and I have unlimited access to this machine, but I don't want to reach it physically. Is it possible to install and maintain a virtual medium using ssh or other remote connection? When I installed the OS I have selected the packets regarding the virtualization, but now from where can I start? Is somewhere a guide for doing this?
I have a dual boot laptop with OpenSUSE and Ubuntu. The boot loader used is Ubuntus Grub that came with the Ubuntu installation.
I have done a zypper dup and upgraded to OpenSUSE 11.4. When I reboot my system I can no longer boot into OpenSUSE, Grub says something about a missing kernel.
I think I understand whats wrong here; the OpenSUSE entry in Grubs table hasn't been updated with the changes brought in by the zypper dup (new kernel i guess).
I'm I correct to assume this? How do I fix the problem? Booting into Ubuntu I tried to find /boot/grub/menu.lst to examine it by I cannot find it. I know Ubuntu use a newer version of Grub, does it have a different file layout?
I want to install Centos 5.5 onto the supermicro server as a dual boot for 64 bit Centos 5.5 and 32 bit Centos 5.5. It has two hard disks at /dev/hda and /dev/hdc.
What is the best way to do this?
I have tried the following but it doesn't work:
1. Install the Centos 64 bit as a fresh installation onto /dev/hda. During the installation walkthrough, it says the grub loader will be installed on /dev/hda/ and there will only be one item on the GRUB menu: CentOS /dev/VolGroup00/LogVol00
2. After installing the Centos 64 bit, I tried to install the Centos 32 bit as a fresh installation onto /dev/hdc. During the installation, the GRUB loader cannot detect the Centos 64 bit installation.
How to make the GRUB to detect both Centos 64 bit and 32 bit? Is there any documentation for reference?
I applied the Kernel update that showed in the updater via the GUI.It now won't boot anymore.Memory for crash kernel (0x0 to 0x0) notwithin permissible range.WARNING calibrate_APIC_clock: the APIC timer calibration may be wrong.
I recently installed CentOS 5.5 final on my HP 18 X Notebook 64 bit processor, I have two physical hardrives each 320 GB, whilst installing CentOS I created LVM ,please find output of my fdisk -l fdisk -l
Disk /dev/sda: 320.0 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes
[Code]..
This installation of CentOS 5.5 will host Asterisk in future ,now for my day to day activities (playing movies, surfing the web etc) I would like to install Ubuntu 10.04 LTS (64 bit) as a dual operating system on my exisiting system.I download the .iso image and copied it on a disk, while booting from CD and through the installation process at the partition screen it does not show me my exisiting LVM or CentOS installation.I stopped the process fearing I may delete my existing CentOS,
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
I have Windows XP installed. And I also plan to install CentOS 5.4.I have two hard drives. Hitachi 500 GB and WD 500 GB.Windows XP is intalled on first drive And I plan to install Linux on Second drive. And since i find some contradicting and not understood by me posts. I have to be sure what to do. I can install Linux, then i can edit grub. and add there something like:
title Windows map (hd0) (hd1) map (hd1) (hd0) root (hd1,0) chainloader +1
When its on one drive as I understand it will definately work. But if its on 2 different drives. There is a problem that windows doesn't boot from secondary drive. So I find this article witch i cannot understand. Do i have to understand it? Or its wrong and bad decision.
[URL]
I have no RAID.After all what is step by step process of creating bootable CentOS and Windows situated on different hard drives drives?
At linux-kvm.org it is stated: "KVM ... consists of a loadable kernel module, kvm.ko that provides the core virtualization infrastructure" and yet there's no mention of Xen, which runs as the hypervisor with KVM. The site seems to be implying the module is the hypervisor. My question to you is: What is the relationship between KVM and Xen on a server that is "running KVM"?
I just did a fresh install of Fedora 14 and noticed that with the ordinary KDE boot the command "free" says it's utilizing 1.5GB of RAM. Is that usual? What is running in BG that uses so much memory?
have a problem with my latest install as follows:1) If I install Fedora 15 so its bootloader is in the MBR (/dev/sdc1) and Centos 6's bootloader into the first sector of the boot partition (/dev/sdc3) I have no problem chainloading from Fedora 15 into Centos6 with the following in Fedora's grub.conf. This has always been the way I have set up multiple OS's (I like the chainloader method).
linux and a good thing to start is to install centos in my pc together with windows xp. please help me on how to dual boot Centos 5.0 and Windows XP pro step by step.
i have windows xp with ntfs partitions on my laptop i want to install centos on it will i be able to dual boot centos with windows xp on the ntfs partition
I've been allocated a Dell Latitute 5400 laptop. Initially it was installed with Windows XP Service Pack 3. Next I repartition every thing using gpart.
Next I install Centos 5.3
during the installation process, I choose windows xp as my default system since my work place works in Windows XP.
but real problem is after installing Centos 5.3 I'm not able to choose which OS to boot.
I've refer to [URL]
but after I go into linux rescue
what I found is that lilo is not installed.
ls -lrth /sbin/lilo
neither is there any presence of /etc/lilo.conf
how am I going to resolve this issue so that I have a chance to choose which OS I can boot into?
I have a problem trying to install CentOS 5 as a dual-boot with my Windows 7. Using Windows tools, I shrunk my main partition and created about a 100GB of unallocated free space. Then, I restarted my computer, booting from the CentOS dvd, but when choosing "Use free space on selected drives and create default layout" option during installation, I get an error saying that partitions couldn't be allocated as primary partitions and that there is not enough space left to create partition for /boot.
after updating freshly installed CentOS 5.2 to 5.3, the new - updated kernel remains invisible to GRUB (at least in GRUB boot menu). I've tried reinstalling, adding the entry manually (although one entry for the new kernel already exists, and is default boot target), altering the old kernel entry to refer to the new kernel and initrd (since it is the only entry visible), and nothing worked. Also, the new boot entry added manually didn't show up on the boot menu either. After trying to edit the entry for the old kernel and initrd and boot it i got the following message:
Error 13: Invalid or unsupported executable format. I've searched and found: 13 : Invalid or unsupported executable format
This error is returned if the kernel image being loaded is not recognized as Multiboot or one of the supported native formats (Linux zImage or bzImage, FreeBSD, or NetBSD). The hardware I installed CentOS on is Dell Optiplex 755 with RAID 1 configured - using onboard controller (if this can be of any relevance).
I installed the PAE kernel package on a Compaq DL380 G3 with 6GB of RAM, CentOS 5.5, vanilla install.
Upon reboot, GRUB cannot boot any of the kernels. I get an invalid device string error. Poking around in GRUB, it detects root correctly at hd(0,0) Beyond that, it cannot even find /boot/grub/stage1. I got out of the bind by reinstalling the kernel that ships with the installer. I'd like to use the 6GB RAM if possible. I attempted to follow GRUB's documentation here: [URL] but there is no grub-mkimage in centos5.5.
Also, the 5.5 installer detects, but appears to have no way to mount usb flash drives. I used the installer disc 1 to get into rescue mode. From there, I inserted a usb flash drive. dmesg and lsusb show the device, but there's no device node and resultant messages when a flash drive is inserted. There is no usb-storage module when doing an lsmod from the installer. I don't have this issue in other distro installers.
