DNS at Stack Overflow is… complex. We have hundreds of DNS domains and thousands of DNS records. We have gone from running our own BIND server to hosting DNS with multiple cloud providers , and we change things fairly often. Keeping everything up to date and synced at multiple DNS providers is difficult. We built…
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In short a lot of stuff is too expensive, isn’t a good fit, or is simply bad software. This ends up leaving an ops team with two options. They can whine about it, or create their own tools. So at Stack Exchange we build our own DevOps tools.