Why should I use HashiCorp Vault instead of Kubernetes Secrets?

HashiCorp Vault offers higher security as it not only encodes but also encrypts secrets. Additionally, it enables the generation of dynamic secrets and provides significant auditing capabilities, which are crucial for many companies.

How does the integration of HashiCorp Vault work in our existing Kubernetes environment?

Integration can be achieved through the Vault Agent Injector, which automatically injects secrets into pods without requiring code changes. Alternatively, the CSI Driver can be used to provide Vault secrets as native Kubernetes volumes.

What are dynamic secrets in HashiCorp Vault and what advantages do they offer?

Dynamic secrets are temporary credentials that are generated on-the-fly, allowing each pod to receive unique credentials. This enhances security as the secrets are time-limited and can be automatically rotated.

How can I ensure that access to my secrets in HashiCorp Vault is logged?

HashiCorp Vault provides extensive audit logging features that log every access to secrets. These logs are crucial for compliance requirements and allow for detailed tracking.

How does automatic secret rotation work in HashiCorp Vault?

Automatic secret rotation in HashiCorp Vault can be configured to occur at specified intervals, such as every 24 hours. This process happens without downtime and requires no manual intervention, enhancing security and efficiency.

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Security 8 min. read

Secrets Management: Integrating HashiCorp Vault into Kubernetes

Kubernetes Secrets are Base64-encoded, not encrypted. For real secret security, you need a dedicated solution like HashiCorp Vault.

devRocks Engineering · 12. February 2026 · Aktualisiert: 31. March 2026 ·

Vault Kubernetes Secrets Security

Secrets Management: Integrating HashiCorp Vault into Kubernetes

The Problem with Kubernetes Secrets

Kubernetes Secrets are merely Base64-encoded — anyone with access to the API server can read them in plain text. For sensitive data such as database passwords, API keys, and TLS certificates, you need more.

Why HashiCorp Vault?

Encryption: Secrets are encrypted at rest and in transit — not just encoded.
Dynamic Secrets: Vault can generate temporary database credentials on the fly — each pod receives its own credentials.
Audit Log: Every access to a secret is logged — essential for compliance.
Rotation: Automatic secret rotation without downtime or manual intervention.

Integration with Kubernetes

Vault Agent Injector: A sidecar container that automatically injects secrets into the pod — no changes to application code required.
CSI Driver: Mount Vault secrets as volumes — a native Kubernetes approach via the Secrets Store CSI Driver.
External Secrets Operator: Synchronizes Vault secrets as native Kubernetes secrets — ideal for legacy applications.

Our Architecture

At devRocks, we use Vault with the CSI Driver. Vault runs as an HA cluster with Raft storage, authenticates pods via Kubernetes service accounts, and rotates database credentials automatically every 24 hours.