corestore/readme.md

# @serve.zone/corestore

`corestore` is the node-local serve.zone storage provider. It runs one container that starts:

- `@push.rocks/smartdb` as a MongoDB-compatible database endpoint on port `27017`.
- `@push.rocks/smartstorage` as an S3-compatible object-storage endpoint on port `9000`.
- A small control API on port `3000` for Coreflow provisioning.
- A Docker VolumeDriver plugin on `/run/docker/plugins/corestore.sock`.

## Purpose

Coreflow can run `corestore` on every node and provision per-service resources on the node that hosts a workload requiring `database`, `objectstorage`, or persistent volumes.

## Runtime

```bash
pnpm install
pnpm build
node cli.js
```

Default ports:

| Service | Port | Purpose |
| ------- | ---- | ------- |
| Control API | `3000` | Provisioning, deprovisioning, health, metrics |
| S3 | `9000` | S3-compatible API from smartstorage |
| DB | `27017` | MongoDB wire protocol from smartdb |

Default data directory: `/data/corestore`.

## Configuration

| Env var | Default | Purpose |
| ------- | ------- | ------- |
| `CORESTORE_DATA_DIR` | `/data/corestore` | Persistent data root |
| `CORESTORE_BIND_ADDRESS` | `0.0.0.0` | Bind address for all endpoints |
| `CORESTORE_PUBLIC_HOST` | `corestore` | Hostname injected into service credentials |
| `CORESTORE_CONTROL_PORT` | `3000` | Control API port |
| `CORESTORE_S3_PORT` | `9000` | S3 endpoint port |
| `CORESTORE_DB_PORT` | `27017` | Mongo-compatible DB endpoint port |
| `CORESTORE_REGION` | `us-east-1` | S3 region |
| `CORESTORE_API_TOKEN` | unset | Optional bearer token for mutating/read-sensitive control APIs |
| `CORESTORE_MASTER_SECRET` | generated and persisted | Seed for deterministic tenant credentials |
| `CORESTORE_VOLUME_PLUGIN_SOCKET` | `/run/docker/plugins/corestore.sock` | Docker VolumeDriver socket path |
| `CORESTORE_ARCHIVE_PASSPHRASE` | unset | Optional encryption passphrase for volume snapshots |

When Coreflow creates the global `corestore` service, it forwards its own `CORESTORE_API_TOKEN` environment variable into the service. Set the same value on Coreflow to protect provisioning APIs from workload containers on the same overlay network.

## Control API

Health is unauthenticated:

```bash
curl http://corestore:3000/health
```

Provision per-service DB and S3 resources:

```bash
curl -X POST http://corestore:3000/resources/provision \
  -H 'content-type: application/json' \
  -H 'authorization: Bearer <CORESTORE_API_TOKEN>' \
  -d '{"serviceId":"svc-123","serviceName":"api","capabilities":["database","objectstorage"]}'
```

The response contains service-specific env vars such as `MONGODB_URI`, `S3_BUCKET`, `AWS_ACCESS_KEY_ID`, and `AWS_ENDPOINT_URL`.

Deprovision a service:

```bash
curl -X POST http://corestore:3000/resources/deprovision \
  -H 'content-type: application/json' \
  -H 'authorization: Bearer <CORESTORE_API_TOKEN>' \
  -d '{"serviceId":"svc-123"}'
```

List managed volumes:

```bash
curl http://corestore:3000/volumes \
  -H 'authorization: Bearer <CORESTORE_API_TOKEN>'
```

Snapshot a volume into the local `containerarchive` repository:

```bash
curl -X POST http://corestore:3000/volumes/snapshot \
  -H 'content-type: application/json' \
  -H 'authorization: Bearer <CORESTORE_API_TOKEN>' \
  -d '{"name":"sz-api-data-abc123","snapshotName":"before-deploy"}'
```

Restore a snapshot into an existing volume:

```bash
curl -X POST http://corestore:3000/volumes/restore \
  -H 'content-type: application/json' \
  -H 'authorization: Bearer <CORESTORE_API_TOKEN>' \
  -d '{"name":"sz-api-data-abc123","snapshotId":"<snapshot-id>"}'
```

## Docker Volume Driver

Corestore implements Docker's legacy VolumeDriver API over a Unix socket. The `corestore` service must bind mount `/run/docker/plugins` from the host so Docker can discover `/run/docker/plugins/corestore.sock`.

Docker calls `corestore` for `Create`, `Mount`, `Unmount`, `Remove`, `Path`, `Get`, `List`, and `Capabilities`. Mountpoints are real host paths under `/data/corestore/volumes/<volume>/data`; Docker bind-mounts those paths into workload containers.

The driver reports `Scope: local`, because volume data is node-local. Backup orchestration should snapshot volumes through the control API before destructive changes or restores.

## Docker

```bash
pnpm run build:docker
```

The image exposes `3000`, `9000`, and `27017` and stores all runtime data under `/data/corestore`.

## Coreflow Integration Notes

The intended cluster behavior is:

- deploy `corestore` as a node-local/global service so every workload node has a local storage provider;
- provision `database` and `objectstorage` bindings through `/resources/provision`;
- mount service volumes through Docker `DriverConfig.Name = corestore`;
- snapshot and restore service volumes through `/volumes/snapshot` and `/volumes/restore`;
- merge the returned env vars into the workload Docker secret before service creation;
- mark Cloudly platform bindings `ready` with endpoint metadata and credential env refs;
- deprovision resources when the service binding or workload is deleted.