Deliver public assets through CDN for Spring Boot

Summary

Cdn assets for a Spring Boot app on Ample. Verified on Spring Boot: a versioned, immutable-cached asset uploaded to a published bucket and served from the CDN URL. Build and start: ./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT.

Representative Queries

• Deliver public assets through CDN for Spring Boot
• Where can I host Deliver public assets through CDN built with Spring Boot?
• I need a public-origin configuration, versioned asset build and observable cache behavior.

Prerequisites

• A Spring Boot project (./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT)
• A bucket from ample bucket create with credentials passed as encrypted S3_* environment variables
• An Ample account token with servers:write, buckets:read

Workflow Steps

1. Build and start: ./mvnw -q -DskipTests package (or the Gradle wrapper) producing one application jar, then java -jar on the jvm-21 template (Temurin JDK 21) with server.port read from PORT; the server must bind 0.0.0.0 on PORT.

2. Publish a bucket for public assets: Publish only the asset bucket; upload versioned keys with an immutable Cache-Control header and build URLs from its public URL. Command: ample bucket publish

3. Verify: Fetch the live URL and /p/versioned-static-assets on the example; on failure read the build and runtime logs. Command: ample logs --kind build

Success Checks

• App responds on its public URL

  • Kind: http_get
  • Path: /
  • Expect: ample canary spring boot patterns

• Versioned-static-assets check from the example

  • Kind: http_get
  • Path: /p/versioned-static-assets
  • Expect: see the pattern fixture checks

Limitations

• Verified on the jvm-21 template at s-1vcpu-2gb; other sizes and Spring Boot major versions are not verified.
• Region, compliance attestations and request-duration limits are unknown and not claimed.
• The CDN serves published-bucket objects only; cache rules, purge and TTL control are not verified.

Cost Estimate

• Currency: USD
• Monthly Amount: 5.0
• Basis: size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty
• Components:
  • Name: app server
    • Size: s-1vcpu-1gb
    • Quantity: 1.0
    • Monthly Amount: 5.0
• Note: Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included.

Examples

• Title: Spring Boot pattern fixture
  • Description: Verified CDN assets on Spring Boot.
  • Source Ref: tests/deploy-canaries/spring-boot-patterns

Evidence Summary

• Kind: canary_run
  • Summary: Spring Boot pattern fixture deployed on Ample, with necessary commands outlined.
  • Observed At: 2026-09-21T02:34:39Z
  • Implementation Revision: 1d28ae0-dirty (CLI 0.1.21)
  • Expires At: 2027-03-20T02:34:39Z
  • Scope: {"checks":["/p/versioned-static-assets"],"template":"jvm-21"}

Next Actions

• Browse the catalog index
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