Deliver public assets through CDN for Echo

Summary

Cdn assets for a Echo app on Ample. Verified on Echo: 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).

Representative Queries

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

Resource Requirements

• primitive:compute
• primitive: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.

Framework

Echo

Workload

Deliver public assets through CDN

Release Status

Published

Support Status

Verified

Execution Status

Ready

Prerequisites

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

Tested Configuration

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

Examples

• Title: Echo pattern fixture
  Description: Verified CDN assets on Echo.
  Source Reference: tests/deploy-canaries/echo-patterns

Success Checks

• Description: App responds on its public URL
  Kind: http_get
  Path: /
  Expect: ample canary echo 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 Echo 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.

Evidence Summary

• Kind: canary_run
• Summary: Echo 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: 2026-09-21T02:34:39Z
• Implementation Revision: 1d28ae0-dirty (CLI 0.1.21)
• Expires At: 2027-03-20T02:34:39Z

Next Actions

• Action Id: browse-catalog
  Label: Browse the catalog index
  Operation Id: catalog_index
  Method: GET
  Relative Path: /v1/catalog
  Origin: api
• Action Id: search-recipes
  Label: Search published recipes by intent, stack and constraints
  Operation Id: search_recipes
  Method: POST
  Relative Path: /v1/catalog/search
• Action Id: plan:page:guides:echo:cdn-assets
  Label: Prepare a side-effect-free deployment plan for an authorized project
  Operation Id: plan_deployment
  Method: POST
  Relative Path: /v1/catalog/plan
• Action Id: auth-setup
  Label: Read the existing agent authentication setup
  Operation Id: existing_auth_setup
  Method: GET
  Relative Path: /mcp/setup
• Action Id: browse:stack:framework-echo
  Label: Browse Echo
  Operation Id: browse_node
  Method: GET
  Relative Path: /v1/catalog/nodes/stack%3Aframework-echo
• Action Id: browse:intent:add-cdn
  Label: Browse Add CDN
  Operation Id: browse_node
  Method: GET
  Relative Path: /v1/catalog/nodes/intent%3Aadd-cdn
• Action Id: browse:pattern:versioned-static-assets
  Label: Browse Versioned static assets
  Operation Id: browse_node
  Method: GET
  Relative Path: /v1/catalog/nodes/pattern%3Aversioned-static-assets