🔸 TLDR
You can go from mvn package to a secure, signed, production-grade container image without writing a Dockerfile.
Paketo Buildpacks will:
▪️ Detect your Spring Boot app
▪️ Build an optimized OCI image
▪️ Generate an SBOM (Software Bill of Materials) for dependency visibility
▪️ Let you sign the image with cosign so your platform can verify it's really you
→ This is how you ship Spring Boot to prod with less friction and more trust. 🔐
🔸 WHY PAKETO BUILDPACKS?
▪️ No Dockerfile needed 🧼
→ pack build your-org/your-app --builder paketobuildpacks/builder-jammy-base
→ It handles JRE, layers, environment, process types.
▪️ Slimmer image 📦
→ Reusable layers = faster deploys and less to scan.
▪️ Consistency in CI/CD 🤖
→ Same command locally and in pipeline. No “it works on my machine” drama.
🔸 SBOM INCLUDED (SUPPLY-CHAIN VISIBILITY) 🧾
Security teams ask: “What’s inside this image?”
Paketo answers automatically.
▪️ SBOM = full ingredient list of libs, deps, versions
▪️ Helps with CVE scans 🔍
▪️ Helps with audits / compliance (hello, platform teams 👋)
You don’t have to manually extract dependencies from the JAR — it’s already exported in standard formats (CycloneDX, SPDX).
🔸 COSIGN: SIGN YOUR IMAGE 🖊️🔐
Building is not enough. You also prove integrity.
Cosign (Sigstore) lets you sign the image digest:
▪️ cosign sign --key cosign.key your-org/your-app:1.0.0
▪️ Your cluster / registry can verify before pulling
This blocks “mystery images” from running in prod. 🛑
Trust becomes enforceable, not just assumed.
🔸 END-TO-END FLOW 🛠️
▪️ mvn clean package (or Gradle build)
▪️ pack build your-org/your-app:1.0.0 --builder paketobuildpacks/builder-jammy-base
▪️ Inspect SBOM (exported by the buildpack)
▪️ cosign sign ... to attest authenticity
Ship it. 🚢
🔸 TAKEAWAYS
▪️ You don’t need Dockerfiles to ship Spring Boot anymore. 🐳
▪️ Paketo gives you optimized images + reproducible builds.
▪️ SBOM gives you transparency for security reviews. 🧾
▪️ Cosign gives you integrity + provenance you can prove. 🔐
Modern Spring delivery is not just about “it runs”, it’s about “it’s trusted”.
#SpringBoot #Java #DevSecOps #SupplyChainSecurity #Paketo #Containers #SBOM #Cosign #CloudNative #Kubernetes #Security #ProdReady
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🗣️ Purushotham said:
Suggest reading about other advantages that come with Packeto BuildPack (with Java 8 limitations) from "Cloud Native SpringBoot in Action" from Thomas Vitale Manning Publications Co.