OpenBao

Centralized Secret Management: Comparing Eight Tools for DevOps and Spring Boot Applications

The article examines the challenges of managing secrets such as passwords, API tokens, and SSH keys across development, CI/CD pipelines, and production environments. It explains how centralized secret registries solve issues like scattered .env files, outdated credentials, and lack of audit trails while emphasizing that delivery mechanisms to applications must be chosen separately. Key concepts including static versus dynamic credentials, leases, rotation, and machine identities are defined to help teams implement least-privilege access. The review compares Infisical, HashiCorp Vault, OpenBao, Doppler, 1Password CLI, Bitwarden Secrets Manager, Passbolt, and Yandex Lockbox across deployment models, offline support, and integration options. Special attention is given to CLI run commands that avoid plaintext files, Spring Cloud Vault integration, and the trade-offs between SaaS convenience and self-hosted control. Practical recommendations focus on separating developer and machine access as well as development and production environments.

Building Secure MLOps Platforms in Air-Gapped Environments for DevOps Engineers

The article explains how DevOps engineers can construct a minimal yet complete MLOps platform inside a closed, air-gapped network without relying on any cloud services. It highlights the cultural gap between data scientists and DevOps teams and shows how MLOps practices such as data versioning, experiment tracking, and model registries bridge that gap. The architecture separates GPU training nodes from a Kubernetes serving cluster and uses open-source components including ArgoCD for GitOps, MLflow with PostgreSQL, MinIO, DVC, OpenBao, and External Secrets Operator. Special attention is given to secrets management with SOPS and age keys, image scanning with Trivy and Bandit, and secure Docker access via socket proxy on the training server. The setup avoids Kubeflow and HashiCorp Vault due to complexity and licensing concerns, favoring lighter, license-friendly alternatives suitable for isolated perimeters.