Kubernetes secrets management is an operating model, not only a storage decision. Strong programs control how sensitive values enter the platform, which workloads and people can use them, how environments remain separated, and how exposure is detected and contained.

Map every secret to a workload and owner

Create an inventory that records the secret type, issuing system, owner, consuming workload, namespace or environment, privilege level, rotation expectation, and revocation method. Unowned secrets tend to become long-lived and broadly accessible.

Separate environments and minimize access

Development, staging, and production should not share the same credentials. Combine the secret manager’s roles and vault boundaries with Kubernetes namespaces, service accounts, RBAC, admission controls, and network controls.

  • Use workload-specific identities where possible
  • Avoid broad human access to production values
  • Keep CI/CD permissions distinct from runtime permissions
  • Remove default or inherited access that is not required

Control delivery and avoid durable copies

Choose a documented delivery pattern and understand where the plaintext value exists: in memory, files, environment variables, volumes, logs, backups, or generated manifests. Prevent values from entering container images, source control, build logs, tickets, and chat.

Rotate, revoke, and investigate

Rotation must include the issuing system and every consumer, not just the stored copy. Define triggers for personnel changes, workload retirement, suspected exposure, provider advisories, and regular policy intervals. Preserve audit evidence across the secret manager, cluster, CI/CD system, and issuing service.