# Host client portal with Flask: tenant-scoped workspaces

Deploy a client portal built with Flask on Ample using the multi-tenant relational data pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL. Verified on Flask: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok). Not separately tested: your tenant model, membership and per-tenant authorization; treat the client portal-specific behavior as your application code.

## Representative Queries
- Host client portal with Flask: tenant-scoped workspaces
- Where can I host Client portal built with Flask?
- I need an explicit tenant model and application-enforced tenant isolation tests.

## Resource Requirements
- **Compute**
- **Postgres**

## 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.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

## Prerequisites
- A Flask project that builds and starts with the documented commands (pip install into .ample/python from requirements.txt, then waitress from app.py reading PORT on the python-3.12 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- An Ample account token with servers:write, databases:read

## Tested Configuration
- **Template**: python-3.12
- **Runtime**: python
- **Size**: s-1vcpu-1gb
- **Install**: `python3 -m pip install --target .ample/python -r requirements.txt`
- **Start**: `PYTHONPATH=.ample/python:${PYTHONPATH:-} python3 app.py`

## Workflow Steps
1. **Build and start**: `pip install into .ample/python from requirements.txt, then waitress from app.py reading PORT on the python-3.12 template. The server must bind 0.0.0.0 on PORT.`
2. **Implement the pattern on PostgreSQL**: The fixture's module implements multi-tenant relational data: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.
3. **Deploy**: Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op. Command: `ample deploy . --name  --public --start "python3 app.py"`  
4. **Verify**: Fetch the live URL and the pattern self-test route(s) (/p/multi-tenant-relational-data) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`. Command: `ample logs  --kind build`

## Examples
### Flask pattern fixture
**Description**: Multi-pattern Flask app whose multi-tenant relational data module was checked live; the module is under tests/deploy-canaries/_pattern-modules.
**Source Reference**: tests/deploy-canaries/flask-patterns

## Success Checks
- App responds on its public URL: **Path**: `/`, **Expect**: `ample canary flask patterns`
- Multi-tenant-relational-data self-test: **Path**: `/p/multi-tenant-relational-data`, **Expect**: `tenant_isolation=ok`

## Limitations
- Verified on the python-3.12 template at s-1vcpu-1gb with the example fixture; other sizes, templates and Flask major versions are not verified.
- The client portal itself (your tenant model, membership and per-tenant authorization) is application code and was not separately tested; the pattern checks are what was verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Apps auto-pause when idle and wake on the next request; always-on is an operator setting, not a plan feature.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified; apps and their databases are placed together.

## Cost Estimate
- **Currency**: USD
- **Monthly Amount**: 10.0
- **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
  - Managed PostgreSQL database
    - **Size**: s-1vcpu-1gb
    - **Quantity**: 1.0
    - **Monthly Amount**: 5.0
- **Note**: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.

## Evidence Summary
1. **Kind**: canary_run  
   **Summary**: Flask pattern fixture deployed on Ample (pip install into .ample/python from requirements.txt, then waitress from app.py reading PORT on the python-3.12 template); checks passed for multi-tenant-relational-data and configuration-secrets. Pattern proof: a tenant column on every row and query, with a cross-tenant read returning nothing (tenant_isolation=ok).  
   **Observed At**: 2026-09-21T01:14:18Z  
   **Implementation Revision**: 50dbac567d2c5cc8e55e6c748a646be0025d9cfb-dirty (CLI 0.1.21)
   **Expires At**: 2027-03-20T01:14:18Z

2. **Kind**: canary_run  
   **Summary**: The same Flask app deployed with a --release-command migration; the marker it created was readable after activation.  
   **Observed At**: 2026-09-20T01:54:51Z  
   **Implementation Revision**: 199ff1dfd52683832ae75d3f98b53a7a4bff7f96-dirty (CLI e3181f5)
   **Expires At**: 2027-03-19T01:54:51Z

## Last Verified At
2026-09-21T01:14:18Z

## 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 Client portal**: [GET /v1/catalog/nodes/workload%3Aclient-portal]  
- **Browse Flask**: [GET /v1/catalog/nodes/stack%3Aframework-flask]  
- **Browse Multi-tenant relational data**: [GET /v1/catalog/nodes/pattern%3Amulti-tenant-relational-data]  
- **Browse Deploy web app**: [GET /v1/catalog/nodes/intent%3Adeploy-web-app]

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