Why clustering ?
In Chapter 1, DevOps in the Real World, you learned about organizational alignment and why is important to shift roles in a company to accommodate DevOps tools. It is not okay anymore to just be a developer or a sysadmin; now you need to be a full stack DevOps engineer in order to get success in any project. Full stack DevOps means that you need to understand the business and the technology used in the organisation. Think about it; if you became a civil engineer instead of an IT engineer, it is mandatory to know the local rules (the business) plus the commercial names of the tools used to build roads and bridges (the technology) but also be able to coordinate their building (ops). Maybe not every engineer needs to know everything ...
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