I want to talk about something new we’re working on at Eucalyptus, but first let me start with a little background. Quite simply, it is a hassle to get an image installed. The current process for Eucalyptus (as we document it) is to download a tarball, untar it, bundle/upload/register the kernel/ramdisk and image itself. That’s about 11 steps. We thought there must be a simpler way to do this.
What we came up with is eustore. In the spirit of euca2ools (euca- and euare- commands), eustore commands give you access to a Eucalyptus image store. That’s store, as in storehouse, not a shop. We have some updated “base” images available on our servers. We have a catalog file that contains metadata about those images. The eustore tools simply give you access to those, and let you issue a single command to download an install an image on your local cloud (or any Eucalyptus cloud you have access to).
The code has been checked in with the euca2ools. To install and use the commands, you’ll need to install from source. Let’s go over that now.
A python package call “boto” is required and you’ll get that from github.com
git clone https://github.com/boto/boto.git
To install boto, simply run the following within the boto directory
python setup.py install
If you don’t have bzr, you’ll need to download it and grab the code with
bzr branch lp:euca2ools
Installing euca2ools (+eustore) is as simple as running (as root) within the euca2ools directory
python setup.py install
Once you do this, you’ll have access to 2 new commands; eustore-describe-images and eustore-install-image. Here are the command summaries;
Usage: eustore-describe-images [options] Options: -h, --help show this help message and exit -v, --verbose display more information about images
Usage: eustore-install-image [options] Options: -h, --help show this help message and exit -i IMAGE_NAME, --image_name=IMAGE_NAME name of image to install -t TARBALL, --tarball=TARBALL name local image tarball to install from -s DESCRIPTION, --description=DESCRIPTION description of image, mostly used with -t option -a ARCHITECTURE, --architecture=ARCHITECTURE i386 or x86_64, mostly used with -t option -p PREFIX, --prefix=PREFIX prefix to use when naming the image, mostly used with -t option -b BUCKET, --bucket=BUCKET specify the bucket to store the images in -k KERNEL_TYPE, --kernel_type=KERNEL_TYPE specify the type you're using [xen|kvm] -d DIR, --dir=DIR specify a temporary directory for large files --kernel=KERNEL Override bundled kernel with one already installed --ramdisk=RAMDISK Override bundled ramdisk with one already installed
eustore-describe-images list the images available at emis.eucalyptus.com. You have the ability to change the url (using the EUSTORE_URL environment variable which is helpful sometimes). The output looks like this;
4150406313 centos i386 2011.07.02 CentOS 5 1.3GB root, Hypervisor-Specific Kernels 1643448352 centos x86_64 2011.07.02 CentOS 5 1.3GB root, Hypervisor-Specific Kernels 3235725435 centos x86_64 2012.1.14 CentOS 5 1.3GB root, Single Kernel 0155946749 centos i386 2011.07.02 CentOS 5 4.5GB root, Hypervisor-Specific Kernels 2606989864 centos x86_64 2011.07.02 CentOS 5 4.5GB root, Hypervisor-Specific Kernels 0598061105 centos x86_64 2012.1.14 CentOS 5 4.5GB root, Single Kernel 0308481541 debian i386 2011.07.02 Debian 6 1.3GB root, Hypervisor-Specific Kernels 3402295892 debian x86_64 2011.07.02 Debian 6 1.3GB root, Hypervisor-Specific Kernels 1450309069 debian x86_64 2012.1.14 Debian 6 1.3GB root, Single Kernel 1258936568 debian i386 2011.07.04 Debian 6 4.5GB root, Hypervisor-Specific Kernels 3056211774 debian x86_64 2011.07.02 Debian 6 4.5GB root, Hypervisor-Specific Kernels 4084351385 debian x86_64 2012.1.14 Debian 6 4.5GB root, Single Kernel 0061180839 ubuntu i386 2011.07.02 Ubuntu 10.04 1.3GB root, Hypervisor-Specific Kernels 3192747366 ubuntu x86_64 2011.07.02 Ubuntu 10.04 1.3GB root, Hypervisor-Specific Kernels 2378540351 ubuntu x86_64 2012.1.14 Ubuntu 10.04 1.3GB root, Single Kernel 1497058306 ubuntu i386 2011.07.02 Ubuntu 10.04 4.5GB root, Hypervisor-Specific Kernels 1463636971 ubuntu x86_64 2011.07.02 Ubuntu 10.04 4.5GB root, Hypervisor-Specific Kernels 0962847746 ubuntu x86_64 2012.1.14 Ubuntu 10.04 4.5GB root, Single Kernel
To install one of these images on your local cloud, you’d use eustore-install-image like this;
eustore-install-image -i 3235725435 -b myimages
This command installs the image named into the myimages bucket on the cloud you are setup to talk to. As with all euca2ools, you’d first source the eucarc file that came with your cloud credentials. I should point out something about uploading kernel and ramdisk to your cloud. Only the admin can install these. If you have admin credentials, the above command will work fine. If you don’t and want to install an image anyway, you would use the –kernel and –ramdisk options to refer to a kernel id and ramdisk id already installed on the cloud. That way, this command will ignore the kernel and ramdisk bundled with the image and refer to the previously uploaded ones.
The project management is happening here: https://projects.eucalyptus.com/redmine/projects/eustore/
It is discussed during the images meetings on IRC (calendar here)