Using Saltstack to update all hosts, but not at the same time

Configuration management and automation tools like SaltStack are great, they allow us to deploy a configuration change to thousands of servers with out much effort. However, while these tools are powerful and give us greater control of our environment they can also be dangerous. Since you can roll out a configuration change to all of your servers at once, it is easy for that change to break all of your servers at once....

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