Step By Step Guide To Install CentOS Linux Virtual Machine in Windows Hyper-V Server


How to load CentOS 5.x or other Linux Operating System in Windows Hyper-V server?


1. Create a Hyper-V server.

First, create a virtual machine within Hyper-V manager. If yo don't know, please refer to Step by Step Guide to Create Windows Hyper-V Virtual Machine.

2. Add a Legacy Network Adapter: CentOS5 doesn't support synthetic devices. We created an emulated network adapter to access Internet in order to make installation convenient.

a. Select the new VM

b. In Actions panel, select Settings...

c. In the new VM's setings window, on the left pane under Hardware, click Add Hardware.

d. On the right pane under Add Hardware select Legacy Network Adapter and click Add.

Figure 1

e. The right panel's content will change to Legacy Network Adapter.

f.  Under Network, select External Virtual Network.

g. Click Apply. Now you have an emulated network adapter to be used to access internet before enable synthetic network adapter.

Figure 2


3) Install CentOS 5

a. On the left panel under Hardware, select IDE Control 1 -> DVD Drive.

b. On the right panel under Media, select proper installation media. We used CentOS DVD image to install, so select Image file : and Browse to the image file and open.

c. Click OK.

Firgure 3

d. Double click the VM in Hyper-V manager. Virutal Machine Connection Window will pop-up.

e. On the new VM window menu, select Action -> Start.

f. Now CentOS installation will start.

Figure 4

*The installation process is much the same like the installation process on a physical server. The emulated network adapter  should be recognized and should show up as Figure 5. Configure it to make installation more convenient.*

Figure 5


4) Install Linux Service Integration Component

a. Now we'll go through the most exciting part of the installation, the Linux IC installation.

b. Download Linux Integration Components for Windows Server 2008 Hyper-V to your host server. (The URL for the time that this article is writen is here).

Figure 6

After extract the ISO file, mount it to the new VM's DVD drive (shows in Figure3). To install the drivers we need the development tools. The easiest way to install those is via Yum.

    sudo yum groupinstall "Development Tools" 

Next we will copy the contents of the cdrom to the server

    mkdir -p /mnt/cdrom
    mount /dev/cdrom /mnt/cdrom
    cp -rp /mnt/cdrom /opt/linux_ic
    umount /mnt/cdrom 


Then let's install it.

Please note that if you want to shift to root user before execute this command by running 'su', it may not work. You need to run 'su -'. It will load root user's context completely(Thank you José! for providing your experience.).
    cd /opt/linux_ic
    sudo ./ drivers 
But you may fail and get the following information:
    Checking if required components are installed...
    No kernel-devel or kernel-source package installed. 
    You must install this package before installing the drivers.

It requires "kernel-devel". So let's install via Yum
    sudo yum install kernel-devel
Let's try again.But you may fail again and get the following:
    Checking if required components are installed...done.
    Installing Linux integration components (vmbus, enlightened ide, enlightened scsi 
    and network drivers) for Hyper-V...
    Building vmbus driver...An error has occured during the setup! 
    Please view the drvinstall.err for more details.
And detailed info shows in drvinstall.err as
    [[email protected] linux_ic]# cat drvinstall.err
    make: *** /lib/modules/2.6.18-128.el5/build: No such file or directory.  Stop.
    make[1]: *** [default] Error 2
    make: *** [public] Error 2
We need to update whole system by running
    sudo yum update
Then reboot the VM.
After reboot let's try again:
    [[email protected] linux_ic]#./ drivers
    Checking if required components are installed...done.
    Installing Linux integration components (vmbus, enlightened ide, enlightened scsi 
    and network drivers) for Hyper-V...
    Building vmbus driver...done.
    Building blkvsc driver...done.
    Building storvsc driver...done.
    Building netvsc driver...done.
    Installing vmbus driver...done.
    Installing blkvsc driver...done.
    Installing storvsc driver...done.
    Installing netvsc driver...done.
    Updating module dependencies. This may take a while...done.
    Installing various udev rules and scripts...done.
    Updating initrd image...
            Backing up /boot/initrd-2.6.18-164.el5.img to /boot/initrd-2.6.18-164.el5.img.backup0
            Done. Updated /boot/initrd-2.6.18-164.el5.img
    Updating grub conf file...
    Installing vmbus startup script...
    *** The drivers have been installed successfully.***       [  OK  ]
You can verify it by running "lsmod | grep vsc". If you get the following, you succeeded. Congratulations!
    [[email protected] linux_ic]# lsmod | grep vsc
    storvsc                67208  0
    netvsc                 74088  0
    vmbus                  86504  2 storvsc,netvsc
    scsi_mod              196697  4 storvsc,scsi_dh,libata,sd_mod
    [[email protected] linux_ic]#   

5. Post install configuration

Note: When rebooting VM you may get error message like "kernel panic". It is because another kernel was installed during update. You can check it out by clicking any key at the very beginning of startup.

Figure 7

You can select one of them manually each time reboot, but it's annoying. To solve the issue, you could modify Grub configuration file, /boot/grub/grub.conf, changing the default to the proper one.
Now everything is OK. You can reboot the server now. During reboot there would be a new network interface named seth0. It's the new recognized synthetic network adapter. You can configure it and remove the emulated one.

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