page:recipes:partner portal:flask:activity history

Host Partner Portal with Flask: Application Activity History

Deploy a partner portal built with Flask on Ample using the transactional workflows 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: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Not separately tested: your domain records, validation rules and concurrency policy; treat the partner portal-specific behavior as your application code.

Representative Queries

Resource Requirements

Infrastructure Requirements

  1. Compute
    • Status: verified
    • Summary: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
  2. Postgres
    • Status: verified
    • Summary: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

Framework

Flask

Workload

Partner portal

Execution Status

Ready

Prerequisites

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 transactional workflows: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). 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/transactional-workflows) from the example; then run your own checks. On failure read ample logs --kind build then --kind runtime.
    • Command: ample logs --kind build

Examples

Success Checks

  1. App Responds on its Public URL
    • Kind: http_get
    • Path: /
    • Expect: ample canary flask patterns
  2. Transactional Workflows Self-Test
    • Kind: http_get
    • Path: /p/transactional-workflows
    • Expect: tx=ok history=2 conflict=rejected

Limitations

Cost Estimate

Last Verified At

2026-09-21T01:14:18Z

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