Last updated: April 29, 2026
Secrets management is the discipline of generating, storing, distributing, rotating, and auditing access to credentials — API keys, database passwords, encryption keys, OAuth tokens. At scale (hundreds of services, dozens of secrets each, rotation requirements), getting this right requires infrastructure, not Git-committed YAML. This module covers the patterns, tools, and operational practices.
Why “just put them in env vars” doesn’t scale
- Where do they come from? Manually entered in CI? Stored in encrypted git? Both have problems
- Rotation is manual — secrets stay the same for years; one leak compromises permanently
- No audit — who read what secret when? Unknowable
- No revocation — leaked secret stays valid until manually rotated
- Dev/staging/prod sprawl — same secret reused across environments
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