creating CentOS based VM Template

Mainly you will need to create Centos VM manually and then do the following steps to the template before converting it to Template

1. create new CentOS vm and while installing it make sure you do the following steps(actually default centos install will be having those 2 properties)
   • make the boot partition is separate from other partitions (you can choose any file system for it)
   • remaining partitions should be lvm based storage be on lvm based storage

         so that after you are done installing the following when you do lvdisplay
     lvdisplay
       --- Logical volume ---
       LV Path                /dev/VolGroup/lv_root
       LV Name                lv_root
       VG Name                VolGroup
       LV UUID                aaVIJ1-EmVY-vjCG-Y6bH-1FaC-nUYk-IPrF6V
       LV Write Access        read/write
       LV Creation host, time localhost.localdomain, 2014-05-13 22:28:44 -0400
       LV Status              available
       # open                 1
       LV Size                6.71 GiB
       Current LE             1718
       Segments               1
       Allocation             inherit
       Read ahead sectors     auto
       - currently set to     256
       Block device           253:0
        
       --- Logical volume ---
       LV Path                /dev/VolGroup/lv_swap
       LV Name                lv_swap
       VG Name                VolGroup
       LV UUID                rAQkcv-dqye-gFPb-9QCx-bJFP-fGez-kOwJSH
       LV Write Access        read/write
       LV Creation host, time localhost.localdomain, 2014-05-13 22:28:48 -0400
       LV Status              available
       # open                 1
       LV Size                816.00 MiB
       Current LE             204
       Segments               1
       Allocation             inherit
       Read ahead sectors     auto
       - currently set to     256
       Block device           253:1

     and df output is

     df -h
     Filesystem                    Size  Used Avail Use% Mounted on
     /dev/mapper/VolGroup-lv_root  6.7G  732M  5.6G  12% /
     tmpfs                         497M     0  497M   0% /dev/shm
     /dev/xvda1                    485M   33M  427M   8% /boot
     
     

     Note: the sizes are not important

• now we need to make scripts run automatically on system startup ,

get the script file: xenicastart.sh from your xenica package (or you can get it from here) , and put inside /etc/ so that you will have the file locations as follows

/etc/xenicastart.sh

1. assign the executable mode to the file by the command

   chmod +x /etc/xenicastart.sh

2. To make the script run at the start of the VM:
3. Open the file /etc/rc.local in edit mode
4. put the line

   source /etc/xenicastart.sh

   inside /etc/rc.local

5. run this script as /etc/rc.local on the command line to make sure it executes our script
6. make sure xentools installed
7. install in the vm parted package

   yum install parted

8. convert to template