Create Ubuntu Xen image for Eucalyptus

(perform steps 1-6 on node controller; 7- on client machine)

1. create a folder and download ISO file.

sudo mkdir ubuntu-xen-manual
cd ubuntu-xen-manual
wget ***.iso

2. Create a 4GB virtual disk

sudo dd if=/dev/zero of=ubuntu-12.04D.img bs=1M count=4096

3. Create Xen configuration file (xen.cfg) with followings:

 name = "ubuntubox"  
 #make sure kernel is in right place  
 kernel = "/usr/lib/xen-default/boot/hvmloader"  
 memory = 1024  
 builder = "hvm"  
 #make sure device_model is in right place  
 device_model = "/usr/lib/xen-default/bin/qemu-dm"  
 boot = "d"  
 disk = ['file:~/ubuntu-xen-manual/***.iso,hdc:cdrom,r',  
 'file:~/ubuntu-xen-manual/ubuntu-12.04D.img,hda,w']  
 vif = ['']  
 #dhcp="on"  
 vnc = 1  
 vncdisplay = 7  
 pae = 1  

 

4. Start domU

sudo xen create xen.cfg  

5. Connect with a VNC viewer (if desktop version)

sudo apt-get install xvnc4viewer

xvncviewer localhost:7

6. Find out the starting block and the block size of the root file system.

sudo parted ubuntu-12.04D.img

(parted) U
Unit? [compact]? b

(parted) p

You'll see an "unrecognized disk label" message because it is a new drive.

(parted) mklabel msdos

(parted) print free

 Number  Start   End          Size         Type  File system  Flags
        16384B  4294967295B  4294950912B        Free Space

(parted) q

sudo dd if=ubuntu-12.04D.img of=rootfs.img bs=1 skip=16384 count=4294950912

(*the extraction takes quite a while; to test change the image size to smaller 512*)

the root image is created as rootfs.img.

7. Bundle, upload and register root image to Eucalyptus

scp rootfs.img to client machine

open a terminal on client machine:

sudo scp server01@10.1.62.172:~/ubuntu-xen-manual/rootfs.img ~/

source eucarc

cd ~/.euca

source eucarc

euca-bundle-image -i ~/rootfs.img (execute in ~/.euca; otherwise EC2_CERT not found error)

 Checking image  
 Compressing image  
 Encrypting image  
 Splitting image...  
 Part: rootfs.img.part.00  
 Generating manifest /tmp/rootfs.img.manifest.xml  

euca-upload-bundle -b ubuntu -m /tmp/rootfs.img.manifest.xml

 Checking bucket: ubuntu  
 Creating bucket: ubuntu  
 Uploading manifest file  
 Uploading part: rootfs.img.part.00  
 Uploaded image as ubuntu/rootfs.img.manifest.xml  

 euca-register ubuntu/rootfs.img.manifest.xml

 IMAGE     emi-48AE3FD9  

euca-describe-images

 IMAGE     emi-48AE3FD9     ubuntu/rootfs.img.manifest.xml 

292622667431     available public          i386     machine 

eki-855C3923     eri-05BE397E          instance-store