How to automatically deploy your public ssh key to Openstack cloud server

Keeping secure all your  passwords when creating new cloud servers is very unpractical and it is a big management burden.

Problem

How to create a new cloud server and automatically deploy ssh authorized_keys file with our public ssh key.

Solution description with demonstration

• Generate a new pub and private key pair that your are going to be using with key authentication for all new cloud servers
• Rename and save your keys so you don't override them (keep the private key secure of course!)
• Create a  new cloud server (cs) with your public key saved automatically in authorized_keys file
• Login to cs using your private key

	$ ssh-keygen
	Generating public/private rsa key pair.
	Enter file in which to save the key (/root/.ssh/id_rsa):
	$ cd .ssh
	mv id_rsa.pub id_rsa_auxiliary.pub
	mv id_rsa id_rsa_auxiliary
	# http://rtomaszewski.blogspot.co.uk/2013/10/home-directory-and-dotfiles-management.html
	# https://github.com/rtomaszewski/dotfiles/blob/master/.bashrc_rado_aux
	$ ls -la $MY_AUX_SSH_KEY_PRIV $MY_AUX_SSH_KEY_PUB
	$ auxnova --image 80fbcb55-b206-41f9-9bc2-2dd7aac6c061 --flavor 2 test-cs
	+------------------------+--------------------------------------+
	| Property | Value |
	+------------------------+--------------------------------------+
	| status | BUILD |
	| updated | 2013-12-09T00:18:59Z |
	| OS-EXT-STS:task_state | scheduling |
	| key_name | None |
	| image | Ubuntu 12.04 LTS (Precise Pangolin) |
	| hostId | |
	| OS-EXT-STS:vm_state | building |
	| flavor | 512MB Standard Instance |
	| id | b51663b5-eaa0-4e66-9161-48b28d133d63 |
	| user_id | 10016865 |
	| name | test-cs |
	| adminPass | XXX |
	| tenant_id | 10016214 |
	| created | 2013-12-09T00:18:59Z |
	| OS-DCF:diskConfig | AUTO |
	| accessIPv4 | |
	| accessIPv6 | |
	| progress | 0 |
	| OS-EXT-STS:power_state | 0 |
	| config_drive | |
	| metadata | {} |
	+------------------------+--------------------------------------+
	$ nova show test-cs | grep network
	$ auxssh IP

view raw openstack_ssh_key_automation hosted with ❤ by GitHub

References

http://developer.rackspace.com/blog/step-by-step-walkthrough-to-using-chef-to-bootstrap-windows-nodes-on-the-rackspace-cloud.html