fraisier 0.3.8

Fraisier - Deployment orchestrator for the FraiseQL ecosystem. Any language, any database, any deployment target.

Fraisier

Atomic deploy + migrate with automatic rollback.

Deploy your PostgreSQL application to bare metal or Docker, with database migrations that actually work. Preflight check, migrate up, restart, health check — and confiture migrate down if anything fails.

preflight → migrate up → restart → health check → done
                │                        │
                │ failure                 │ failure
                ▼                        ▼
         (no changes)            migrate down → git rollback

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Why Fraisier?

Every deployment tool treats database migrations as an afterthought:

Tool	Migration story
Kamal	Piggybacks on Rails entrypoint — no locking, no rollback
Dokku	Manual dokku run <app> rake db:migrate
CI scripts	Brittle ssh && migrate && restart — breaks at the worst moment
Migration tools	Run migrations with zero awareness of deployment state

Nobody coordinates preflight → migrate → deploy → health check → rollback as a single atomic workflow. Fraisier does.

Who is this for?

Teams running PostgreSQL applications using confiture for migrations on bare metal or Docker Compose. You've been burned by:

• A migration that locked a table during deploy
• A deploy that went live before the migration finished
• A failed migration with no way to roll back the schema
• A rollback that reverted the app but left the schema inconsistent

When NOT to use Fraisier

• Kubernetes: Use Helm, ArgoCD, or Flux. Fraisier manages systemd services and Docker Compose, not pods.
• Multiple databases: Fraisier is PostgreSQL-only via confiture. MySQL, MongoDB, etc. are not supported.
• Large fleets (10+ servers): Fraisier targets 1-3 servers. For larger fleets, use Ansible, Terraform, or a proper orchestrator.
• No database migrations: If your app doesn't have a database or doesn't use confiture, fraisier's main value proposition doesn't apply.

Compared to

Tool	Strength	Fraisier's difference
Kamal	Zero-config Docker deploy	No migration awareness, no atomic rollback
Dokku	Heroku-like git push	Migrations are manual, no preflight checks
Coolify	Web UI, broad language support	Fraisier is CLI-first, PostgreSQL-deep
Ansible	Infrastructure automation	Fraisier is deploy-only, not infra management

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Quickstart

1. Install

pip install fraisier
# or
uv add fraisier

2. Initialize

fraisier init

This creates a fraises.yaml with sensible defaults.

3. Preview

fraisier deploy my_api production --dry-run

╭──────── DRY RUN ────────╮
│  Target      my_api -> production
│  Strategy    migrate
│  Preflight   check reversibility + duplicates
│  Migration   confiture migrate up
│  Restart     gunicorn-myapi.service
│  Health      http://localhost:8000/health (timeout: 30s)
│  Rollback    confiture migrate down (if health check fails)
╰─────────────────────────╯

4. Deploy

fraisier deploy my_api production

5. Ship (bump + commit + push + deploy)

fraisier ship patch              # 1.0.0 -> 1.0.1, commit, push, deploy
fraisier ship patch --no-deploy  # Skip deploy after push

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How It Works

Deployment strategies

Three database-aware strategies, configured per environment:

Strategy	Environment	What it does
rebuild	development	Drop DB, rebuild schema from scratch via confiture migrate rebuild
restore_migrate	staging	Restore production backup, then confiture migrate up
migrate	production	Preflight → confiture migrate up → restart → health check. Rollback via confiture migrate down on failure

Rollback

When a health check fails after migration, Fraisier:

1. Calls confiture migrate down --steps=N to reverse exactly the migrations applied
2. Checks out the previous git commit
3. Restarts the service

Use --no-rollback to deploy irreversible migrations (those without down files).

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Configuration

Fraisier reads fraises.yaml. A fraise is a deployable service (API, worker, ETL, scheduled job).

fraises:
  my_api:
    type: api
    environments:
      production:
        branch: main
        app_path: /var/www/my-api
        systemd_service: gunicorn-myapi.service
        database:
          name: myapp_production
          strategy: migrate
          confiture_config: confiture.yaml
        health_check:
          url: http://localhost:8000/health
          timeout: 30

branch_mapping:
  main:
    fraise: my_api
    environment: production

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CLI Reference

Core

fraisier init                                    Scaffold fraises.yaml
fraisier deploy <fraise> <env> [--dry-run]       Deploy a fraise
fraisier deploy <fraise> <env> --no-rollback     Allow irreversible migrations
fraisier ship patch|minor|major [--dry-run]      Bump, commit, push, deploy
fraisier ship patch --no-deploy                  Ship without deploying
fraisier list [--flat]                           List all fraises
fraisier status <fraise> <env>                   Check fraise status
fraisier rollback <fraise> <env>                 Roll back to previous version
fraisier health [--json]                         Check all service health

Database

fraisier db migrate <fraise> -e <env>            Run database migrations
fraisier db reset <fraise> -e <env>              Reset from template (dev)
fraisier backup <fraise> -e <env>                Database backup

Infrastructure

fraisier scaffold [--dry-run]                    Generate systemd, nginx, CI files
fraisier providers                               List deployment providers
fraisier provider-test <type>                    Run provider pre-flight checks

Versioning

fraisier version show                            Show version.json
fraisier version bump patch|minor|major          Bump version atomically

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Deployment Providers

Provider	Description
bare_metal	SSH + systemd — the default for VPS deployments
docker_compose	Docker Compose stacks with container exec for migrations

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Git Providers

Auto-detected from webhook headers. Supports per-fraise overrides.

Provider	Self-hosted
GitHub / GitHub Enterprise	Yes
GitLab / self-hosted GitLab	Yes
Gitea / Forgejo	Yes
Bitbucket Cloud / Server	Yes

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Webhook Server

Event-driven deploys triggered by git push:

fraisier-webhook    # starts on port 8080

Configure your Git server to send push events to https://your-server/webhook. The webhook auto-detects the Git provider from request headers.

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Part of the FraiseQL Ecosystem

Tool	Purpose
confiture	PostgreSQL schema migrations
pgGit	Database version control
fraiseql	Compiled GraphQL engine (Rust runtime)
pg_tviews	Incremental materialized views

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License

MIT