# Host ai workflow runner with ASP.NET Core: Postgres-backed state

Deploy a ai workflow runner built with ASP.NET Core on Ample using the durable job state 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 ASP.NET Core: a jobs table with a state and attempts counter, processing inside a row-locked transaction, and a second run that is a no-op (job=done attempts=1 idempotent=true). Not separately tested: your job types, payload schema and retry policy; treat the ai workflow runner-specific behavior as your application code.

## Representative Queries
- Host ai workflow runner with ASP.NET Core: Postgres-backed state
- Where can I host AI workflow runner built with ASP.NET Core?
- I need a durable state schema and retry/recovery semantics implemented by application code.

## Resource Requirements
- **Compute**: primitive:compute
- **Postgres**: primitive:postgres

## Infrastructure Requirements
1. **Compute**: 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**: 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
**ASP.NET Core**

## Workload
**AI workflow runner**

## Execution Status
**Ready**

## Prerequisites
- A ASP.NET Core project that builds and starts with the documented commands (dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT)
- 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**: dotnet-10
- **Runtime**: dotnet
- **Size**: s-1vcpu-1gb
- **Build**: dotnet publish -c Release -o out
- **Start**: ASPNETCORE_URLS=http://0.0.0.0:$PORT dotnet out/$(basename $(ls out/*.runtimeconfig.json | head -n 1) .runtimeconfig.json).dll

## Input Schema
```json
{
  "type": "object",
  "properties": {
    "env": {
      "type": "array",
      "maxItems": 50,
      "items": {
        "type": "string",
        "pattern": "^[A-Z][A-Z0-9_]*=.*$"
      }
    },
    "name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 63,
      "pattern": "^[a-z0-9-]+$"
    },
    "path": {
      "type": "string",
      "minLength": 1,
      "maxLength": 512
    },
    "release_command": {
      "type": "string",
      "maxLength": 512
    }
  },
  "required": ["name", "path"],
  "additionalProperties": false
}
```

## Workflow Steps
1. **Build and start**: dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**: The fixture's module implements durable job state: a jobs table with a state and attempts counter, processing inside a row-locked transaction, and a second run that is a no-op (job=done attempts=1 idempotent=true). 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`
4. **Verify**: Fetch the live URL and the pattern self-test route(s) (/p/durable-job-state) from the example; then run your own checks. On failure read `ample logs  --kind build` then `--kind runtime`.
   - Command: `ample logs  --kind build`

## Limitations
- Verified on the dotnet-10 template at s-1vcpu-1gb with the example fixture; other sizes, templates and ASP.NET Core major versions are not verified.
- The ai workflow runner itself (your job types, payload schema and retry policy) is application code and was not separately tested; the pattern checks are what was verified.

## Cost Estimate
- **Monthly Amount**: $10.00 USD
- **Components**:
  - App server (s-1vcpu-1gb): $5.00
  - Managed PostgreSQL database (s-1vcpu-1gb): $5.00
- Note: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.

## Next Actions
1. **Browse the catalog index**: 
   - Endpoint: /v1/catalog
2. **Search published recipes by intent, stack and constraints**: 
   - Endpoint: /v1/catalog/search
   - Method: POST
   - Body: {"limit": 5, "query": "Host ai workflow runner with ASP.NET Core: Postgres-backed state"}
3. **Prepare a side-effect-free deployment plan for an authorized project**: 
   - Endpoint: /v1/catalog/plan
   - Method: POST
4. **Read the existing agent authentication setup**: 
   - Endpoint: /mcp/setup
5. **Browse AI workflow runner**: 
   - Endpoint: /v1/catalog/nodes/workload%3Aai-workflow-runner