chef-deregistration-manager
Queue Based Chef Client Deregistration for the Cloud
Building Debian Packages
sudo aptitude install build-essential git python-stdeb
git clone https://github.com/bmhatfield/chef-deregistration-manager.git
cd chef-deregistration-manager
python setup.py --command-packages=stdeb.command bdist_deb
chef-deregistration-manager
Dependencies: python-setuptools python-configobj python-boto (2+) python-pychef (https://github.com/coderanger/pychef)
Polls SQS
If the queue does not exist:
Create queue - The name is a combination of queue_name and id, both configurable
If there are events:
Grab event.
If the event is a 'delete':
Dump Chef node JSON to disk
Remove Chef Node via Chef API
Remove Chef Client via Chef API
If there are no more events:
Trigger chef-client run
If the event is an 'ensure':
Fire Alert
Recreate Node in Chef
chef-registration-init (clients)
stop():
if runlevel == 0:
Issue SNS message to delete node
FAQ
Q: It won't start.
A: Make sure that the dependencies are installed, and that you've created server.cfg and client.cfg (the install creates example.cfg)
Q: Why would I put my AWS credentials on every host?! That's insecure!
A: We use IAM to create credentials that only have permission to publish to the relevant queue. The server's credentials will need the ability to create and manage SNS endpoints as well as SQS queues, as well.
More information
This code based upon:
http://www.nuvolesystems.com/2012/07/02/chef-node-de-registration-for-autoscaling-groups/