One of my primary aims when building a resillient cloud architecture, is being able to spawn instances quickly. Many cloud providers give you tools to create images or snapshots of existing cloud instances and launch them. This is great, but not particularly portable. If I have one instance on Linode and I want to clone it to Rackspace, I can’t easily do that.
That’s one of the reasons I am creating bootstrap scripts that completely automate a server (re)build process. Given an IP address and root password, the script should connect to the instance, install all necessary packages, pull the code from the repository, initialize the database, configure the web server and get the server ready for restore of user-data.
I’m primarily using fabric for automating this process, and use a standard operating system across different cloud providers. This allows a fairly consistent deployments across different providers. This also means the architecture is not dependent on a single provider, which in my opinion gives a huge benefit. Not only can my architecture run on different data centres or geographic locations, but I can also be flxeible in the choice of hosting providers.
All that aside however, building and refining this bootstrapping process allowed me to run it across different cloud providers, namely: Rackspace, Linode, and EC2. Whilst running the bootrstrapping process many times, I thought it might be a great opportunity to compare performance of those providers side-by-side. My bootstrap process runs the same commands in order, and covers quite a variety of operations. This should give an interesting indication on how each of the cloud providers performs.
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