## Diagnose Deployment Failures for Symfony

Deployment diagnostics for a Symfony app on Ample. Verified on Symfony: the same app deployed with a deliberate boot failure (CANARY_FAIL=boot): `ample deploy` exited 1 with a coded failure (health_check_failed when the process dies at boot, public_ingress_failed when the framework boots but every request answers 500) and the app's own error line was readable with `ample logs  --kind runtime`, so the cause is read from the framework's output rather than guessed. Build and start: composer install --no-dev from composer.lock with Symfony Runtime's dotenv disabled (extra.runtime.disable_dotenv; .env never ships, its values arrive as encrypted env, and compile-time parameters such as DEFAULT_URI need a default), then FrankenPHP serving public/ (php-server with the index.php fallback) reading PORT on the php-8.5 template with APP_ENV=prod.

### Prerequisites
- A Symfony project (composer install --no-dev from composer.lock with Symfony Runtime's dotenv disabled (extra.runtime.disable_dotenv; .env never ships, its values arrive as encrypted env, and compile-time parameters such as DEFAULT_URI need a default), then FrankenPHP serving public/ (php-server with the index.php fallback) reading PORT on the php-8.5 template with APP_ENV=prod)
- An Ample account token with servers:write

### Workflow Steps
1. **Read the failure code**  
   Deploy is synchronous. Exit 1 with build_failed means the isolated build failed; health_check_failed means the app built but never answered on PORT (it crashed at boot or bound the wrong port); public_ingress_failed means it answered on PORT but the public URL returned an error status (a request handler or bootstrap failed); exit 2 means a required preflight action is blocking.

2. **Read the build log**  
   The last lines name the failing command and its output.  
   Command: `ample logs  --kind build`

3. **Read the runtime log**  
   For health_check_failed the runtime log carries the Symfony process output: in the verified run the deliberate boot failure's own error line was there, followed by the platform's health-check verdict and the start command it ran.  
   Command: `ample logs  --kind runtime`

4. **Fix and redeploy once**  
   Change the source, the environment or the command override, then run ample deploy again. Do not loop deploys to poll status; an unchanged redeploy is a no-op.

5. **Verify**  
   Fetch the live URL on the example; on failure read the build and runtime logs.  
   Command: `ample logs  --kind build`

### Success Checks
- **Failed deploy reports health_check_failed synchronously**  
   Expect: `ample deploy` exits 1 with error.code health_check_failed
- **Runtime log carries the app's own error line**  
   Expect: `ample logs  --kind runtime` shows the framework's error output before the health-check verdict

### Limitations
- Verified on the php-8.5 template at s-1vcpu-1gb; other sizes and Symfony 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, size: s-1vcpu-1gb, quantity: 1.0, monthly amount: 5.0.

### Evidence Summary
- **Kind:** canary_run  
  **Summary:** Symfony pattern fixture deployed on Ample with CANARY_FAIL=boot...(abbreviated for brevity)  
  **Observed At:** 2026-09-21T02:23:07Z  
  **Expires At:** 2027-03-20T02:23:07Z  
  **Scope:** checks...

### Examples
- **Title:** Symfony pattern fixture  
  **Description:** Verified deployment diagnostics on Symfony.  
  **Source Reference:** tests/deploy-canaries/symfony-patterns

### Next Actions
- [Browse the catalog index](/v1/catalog)  
- [Search published recipes by intent, stack and constraints](/v1/catalog/search)  
- [Prepare a side-effect-free deployment plan for an authorized project](/v1/catalog/plan)  
- [Read the existing agent authentication setup](/mcp/setup)  
- [Browse Symfony](/v1/catalog/nodes/stack%3Aframework-symfony)  
- [Browse Troubleshoot deployment](/v1/catalog/nodes/intent%3Atroubleshoot-deployment)  
- [Browse Public web service](/v1/catalog/nodes/pattern%3Apublic-web-service)