UbuntuHelp:UEC/BundlingImages

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https://help.ubuntu.com/community/UEC/BundlingImages

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Using UEC consists of creating and registering images with the Cloud Controller. There is more than one way to obtain a virtual image:

• Download an image from the network, bundle and upload it
• Create a custom image using VMBuilder
• Use the Image store to download and install and image

Here we will describe the process of downloading one of the Official Ubuntu UEC Images that we publish and maintain on a regular basis.

Note: the shell variables that are set in the below code snippets are very useful for scripts or to reuse them when typing commands.

1. Download the UEC image for the architecture you want. You can do it from your browser or from the command line:

TIMESTAMP=$(date +%Y%m%d%H%M%S)
RELEASE=karmic
ARCH=amd64    # Or this might be i386
[ $ARCH = "amd64" ] && IARCH=x86_64 || IARCH=i386
UEC_IMG=$RELEASE-uec-$ARCH
URL=http://uec-images.ubuntu.com/$RELEASE/current/
[ ! -e $UEC_IMG.tar.gz ] &&  wget $URL/$UEC_IMG.tar.gz # This may take a bit, depending on your connectivity

1. Next, you will need to bundle, upload and register a kernel, ramdisk and finally your image:
   1. Unpack the UEC image tarball

   [ ! -e $UEC_IMG.img ] && tar -S -xzf $UEC_IMG.tar.gz
   

   1. Bundle the kernel

   BUCKET_KERNEL="k-$TIMESTAMP"
   UEC_KERNEL=$UEC_IMG-vmlinuz-virtual
   euca-bundle-image -i $UEC_KERNEL -r $IARCH --kernel true
   euca-upload-bundle -b $BUCKET_KERNEL -m /tmp/$UEC_KERNEL.manifest.xml
   EKI=$(euca-register $BUCKET_KERNEL/$UEC_KERNEL.manifest.xml | grep "^IMAGE" | awk '{print $2}') && echo $EKI
   

   1. Bundle the initrd

   BUCKET_INITRD="r-$TIMESTAMP"
   UEC_INITRD=$UEC_IMG-initrd-virtual
   euca-bundle-image -i $UEC_INITRD -r $IARCH --ramdisk true
   euca-upload-bundle -b $BUCKET_INITRD -m /tmp/$UEC_INITRD.manifest.xml
   ERI=$(euca-register $BUCKET_INITRD/$UEC_INITRD.manifest.xml | grep "^IMAGE" | awk '{print $2}') && echo $ERI
   

   1. Bundle the image itself (this can take some time)

   BUCKET_IMAGE="i-$TIMESTAMP"
   UEC_IMG=$RELEASE-uec-$ARCH
   euca-bundle-image -i $UEC_IMG.img -r $IARCH --kernel $EKI --ramdisk $ERI # This will take a long time (~10m)
   euca-upload-bundle -b $BUCKET_IMAGE -m /tmp/$UEC_IMG.img.manifest.xml
   EMI=$(euca-register $BUCKET_IMAGE/$UEC_IMG.img.manifest.xml | grep "^IMAGE" | awk '{print $2}') && echo $EMI
   

   Alternate: The uec-tools branch has a script named 'register-uec-tarball' that combines the steps above.

   # invoke as ./register-uec-tarball <tarball> <bucket> [<arch>]
   ./register-uec-tarball ubuntu-9.10-uec-amd64.tar.gz ubuntu-9.10-uec-release-amd64
    

   1. Now, your kernel, ramdisk and image will have been uploaded into Eucalyptus and should be ready to run. To confirm, run the following command:

   euca-describe-images
   

   You should see a registered kernel, ramdisk and image and they should be marked as 'available'.