Extending Chef to bootstrap distributed systems
Most configuration management systems such as Chef, Puppet, CFEngine, Ansible, and so on, operate at a node level, and any configuration change that is required to be made is applied only upon the convergence runs that happen at the scheduled intervals and aren't event-based. For example, say you've a setup comprising of a load balancer (say HAProxy) and web servers. Now, you are running a website and you want to ensure that as soon as the traffic spikes up, you should be able to provision a new web server.
You've written the HAProxy cookbook so that it searches for nodes of type webserver, populates its config, and reloads the HAProxy process. You've also written the Chef code to bring up the web ...
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