Configure environment and secrets for Sinatra

Configuration and secrets for a Sinatra app on Ample. Verified on Sinatra: an --env value delivered encrypted and reported as present without being echoed (secret=set). Build and start: bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via rackup (config.ru) reading PORT on the ruby-3.4 template.

Prerequisites

• A Sinatra project (bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via rackup (config.ru) reading PORT on the ruby-3.4 template)
• An Ample account token with servers:write

Workflow Steps

Build and start

Bundle install into vendor/bundle from Gemfile.lock (development and test groups skipped), then Puma via rackup (config.ru) reading PORT on the ruby-3.4 template; the server must bind 0.0.0.0 on PORT.

Pass values on deploy

Use --env KEY=value (repeatable) or --env-file; values are encrypted at rest and reused on redeploys. Declare names only in ample.toml.

Command: ample deploy . --name --public --env MY_SECRET=...

Verify

Fetch the live URL and /p/configuration-secrets on the example; on failure read the build and runtime logs.

Command: ample logs --kind build

Limitations

• Verified on the ruby-3.4 template at s-1vcpu-1gb; other sizes and Sinatra major versions are not verified.
• Region, compliance attestations and request-duration limits are unknown and not claimed.

Cost Estimate

• Currency: USD
• Monthly Amount: 5.0
• Basis: Size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty
• Components:
  • App server: s-1vcpu-1gb (Quantity: 1.0, Monthly Amount: 5.0)
• Note: Always-on monthly price of the tested sizes; apps auto-pause when idle.

Success Checks

• App responds on its public URL.
• Configuration-secrets check from the example.

Evidence Summary

• Kind: canary_run
• Summary: Sinatra pattern fixture deployed on Ample; for this guide: an --env value delivered encrypted and reported as present without being echoed (secret=set).
• Observed At: 2026-09-20T23:45:31Z
• Expires At: 2027-03-19T23:45:31Z

Examples

• Title: Sinatra pattern fixture
• Description: Verified configuration and secrets on Sinatra.
• Source Ref: tests/deploy-canaries/sinatra-patterns

Next Actions

• Browse the catalog index: GET /v1/catalog
• Search published recipes by intent, stack and constraints: POST /v1/catalog/search
• Prepare a side-effect-free deployment plan for an authorized project: POST /v1/catalog/plan
• Read the existing agent authentication setup: GET /mcp/setup
• Browse Sinatra: GET /v1/catalog/nodes/stack%3Aframework-sinatra
• Browse Configure deployment: GET /v1/catalog/nodes/intent%3Aconfigure-deployment
• Browse Public web service: GET /v1/catalog/nodes/pattern%3Apublic-web-service