Imaging Hot Sauce
Modular image builder for imaging awesomeness!
- Make it easy to create EC2 style images (root, kernel, ramdisk like)
- Make it easy to add in custom logic on-top of those images via a modular set of python code that you can easily extend
- Improve on #1 and #2
- Needs love and tender care (it is mostly a prototype)
- add_user (adds a given set of sudo users)
- install_rpms (installs a list of rpm packages) ...
- Your imagination...
$ sudo python ./build.py -s 4G
To add users make a yaml like the following:
$ cat build.yaml --- # Which modules should be ran (in order) modules: - install-rpms - add_user # Enable this if you wish to install # any users info into the image (ie for testing). add_users: - harlowja ...
$ sudo python ./build.py -s 4G -o blah.tar.gz -x
Adding your own module
To add your own module create a file in the
modules folder with a function
of the following format:
def modify(name, root, cfg): # DO SOMETHING HERE
name that is passed in will be the module name (from configuration) with
root variable being the root directory of the mounted image (useful for
or other file alterations and the
cfg variable will be the build configuration
dictionary (useful for extracting any module configuration specifics)
Then save this file with a given name, ie
xyz.py, and then to get this module
to be activated add it to the modules list in the
build.yaml file with the name
xyz and then go ahead and build your image.
Note: If this module errors out (or other modules do the same) the image will not be successfully built so use this method to stop image building (ie by throwing exceptions).
Using your image
To upload this image, take the
image-upload tool in anvil (or use the glance-client
itself, either or) and provide it the url of your file, for example given a
/homes/harlowja/blah.tar.gz you would upload this via the following command.
$ python tools/img-uploader.py -i file://///homes/harlowja/blah.tar.gz -g $GLANCE_URI -k $KEYSTONE_URI -u $YOUR_USER -t $YOUR_TENANT
image-upload tool will go through the nitty gritty of extracting that
image and connecting the pieces together to form a useable image in openstack. You
can of course do the same with the glance-client
(although you will have to know the special invocations to achieve the same effect as the
image-upload tool performs).
Note: The image produced should also be easily useable in amazon (if someone ever gets around to trying that...).