page:guides:gin:cdn assets

Deliver public assets through CDN for Gin

Summary

Cdn assets for a Gin app on Ample. Verified on Gin: a versioned, immutable-cached asset uploaded to a published bucket and served from the CDN URL. Build and start: CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build).

Workload

Deliver public assets through CDN

Framework

Gin

Resource Requirements

• Compute
• CDN

Infrastructure Requirements

• Compute: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
• CDN: The CDN host serves objects from published buckets. It does not front app compute and is not a cache or key-value store.

Prerequisites

• A Gin project (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build))
• A bucket from ample bucket create with credentials passed as encrypted S3_* environment variables
• An Ample account token with servers:write, buckets:read

Tested Configuration

• Template: ubuntu-24.04
• Runtime: go
• Size: s-1vcpu-1gb
• Build: CGO_ENABLED=0 go build -o app ./...
• Start: ./app

Workflow Steps

1. Build and start: CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build); 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

Examples

• Title: Gin pattern fixture
  • Description: Verified CDN assets on Gin.
  • Source Ref: tests/deploy-canaries/gin-patterns

Success Checks

• Description: App responds on its public URL
  • Kind: http_get
  • Path: /
  • Expect: ample canary gin patterns
• Description: 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 ubuntu-24.04 template at s-1vcpu-1gb; other sizes and Gin 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
• Note: Always-on monthly price of the tested sizes; apps auto-pause when idle. Buckets are allocation-priced per quota and not included.

Evidence Summary

• Kind: canary_run
  • Summary: Gin pattern fixture deployed on Ample (CGO_ENABLED=0 go build -o app ./... then ./app on the ubuntu-24.04 template (go.sum committed for a reproducible build)); for this guide: a versioned, immutable-cached asset uploaded to a published bucket and served from the CDN URL.
  • Observed At: 2026-09-21T01:15:54Z
  • Implementation Revision: 50dbac567d2c5cc8e55e6c748a646be0025d9cfb-dirty (CLI 0.1.21)
  • Expires At: 2027-03-20T01:15:54Z

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