Five thousand hosts across two clouds and a datacentre: what does your Ansible inventory look like?

Static INI files die somewhere near two hundred hosts. Point inventory plugins at the systems that already know the truth, derive groups from tags with constructed inventory, and plan for stale hosts before they page you.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

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Next in this trackNew engineers cannot decrypt the Vault-encrypted group_vars. How did key handling rot, and what is the fix?Next in this trackYour playbooks are idempotent today. How do you prove five hundred servers stayed converged over a month?Next in this trackA team wants to ditch HCL for Pulumi because they prefer TypeScript. Where do you agree, and where do you refuse?

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