Why it matters

Secret leaks common; managing well essential.

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The architecture

Env vars: injected from secret store.

K8s secrets: mounted into pods.

Secret handlingSecret managerVault / AWS SM / K8s SecretsInject at runtimeenv or fileRotate + auditregularNever in Spark configs / jars / logs
Secret pattern.
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How it works end to end

Options: HashiCorp Vault, cloud secret managers, K8s Secrets.

Databricks Secret Scopes: managed secrets.

Delegation: use instance profile / service account instead of key for cloud access.