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https://github.com/meta-llama/llama-stack.git
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2c43285e22
**This PR changes configurations in a backward incompatible way.**
Run configs today repeat full SQLite/Postgres snippets everywhere a
store is needed, which means duplicated credentials, extra connection
pools, and lots of drift between files. This PR introduces named storage
backends so the stack and providers can share a single catalog and
reference those backends by name.
## Key Changes
- Add `storage.backends` to `StackRunConfig`, register each KV/SQL
backend once at startup, and validate that references point to the right
family.
- Move server stores under `storage.stores` with lightweight references
(backend + namespace/table) instead of full configs.
- Update every provider/config/doc to use the new reference style;
docs/codegen now surface the simplified YAML.
## Migration
Before:
```yaml
metadata_store:
type: sqlite
db_path: ~/.llama/distributions/foo/registry.db
inference_store:
type: postgres
host: ${env.POSTGRES_HOST}
port: ${env.POSTGRES_PORT}
db: ${env.POSTGRES_DB}
user: ${env.POSTGRES_USER}
password: ${env.POSTGRES_PASSWORD}
conversations_store:
type: postgres
host: ${env.POSTGRES_HOST}
port: ${env.POSTGRES_PORT}
db: ${env.POSTGRES_DB}
user: ${env.POSTGRES_USER}
password: ${env.POSTGRES_PASSWORD}
```
After:
```yaml
storage:
backends:
kv_default:
type: kv_sqlite
db_path: ~/.llama/distributions/foo/kvstore.db
sql_default:
type: sql_postgres
host: ${env.POSTGRES_HOST}
port: ${env.POSTGRES_PORT}
db: ${env.POSTGRES_DB}
user: ${env.POSTGRES_USER}
password: ${env.POSTGRES_PASSWORD}
stores:
metadata:
backend: kv_default
namespace: registry
inference:
backend: sql_default
table_name: inference_store
max_write_queue_size: 10000
num_writers: 4
conversations:
backend: sql_default
table_name: openai_conversations
```
Provider configs follow the same pattern—for example, a Chroma vector
adapter switches from:
```yaml
providers:
vector_io:
- provider_id: chromadb
provider_type: remote::chromadb
config:
url: ${env.CHROMADB_URL}
kvstore:
type: sqlite
db_path: ~/.llama/distributions/foo/chroma.db
```
to:
```yaml
providers:
vector_io:
- provider_id: chromadb
provider_type: remote::chromadb
config:
url: ${env.CHROMADB_URL}
persistence:
backend: kv_default
namespace: vector_io::chroma_remote
```
Once the backends are declared, everything else just points at them, so
rotating credentials or swapping to Postgres happens in one place and
the stack reuses a single connection pool.
97 lines
3.2 KiB
Python
97 lines
3.2 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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# Copyright (c) Meta Platforms, Inc. and affiliates.
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# All rights reserved.
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# This source code is licensed under the terms described in the LICENSE file in
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# the root directory of this source tree.
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from __future__ import annotations
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from llama_stack.core.storage.datatypes import KVStoreReference, StorageBackendConfig, StorageBackendType
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from .api import KVStore
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from .config import KVStoreConfig
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def kvstore_dependencies():
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"""
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Returns all possible kvstore dependencies for registry/provider specifications.
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NOTE: For specific kvstore implementations, use config.pip_packages instead.
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This function returns the union of all dependencies for cases where the specific
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kvstore type is not known at declaration time (e.g., provider registries).
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"""
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return ["aiosqlite", "psycopg2-binary", "redis", "pymongo"]
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class InmemoryKVStoreImpl(KVStore):
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def __init__(self):
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self._store = {}
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async def initialize(self) -> None:
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pass
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async def get(self, key: str) -> str | None:
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return self._store.get(key)
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async def set(self, key: str, value: str) -> None:
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self._store[key] = value
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async def values_in_range(self, start_key: str, end_key: str) -> list[str]:
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return [self._store[key] for key in self._store.keys() if key >= start_key and key < end_key]
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async def keys_in_range(self, start_key: str, end_key: str) -> list[str]:
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"""Get all keys in the given range."""
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return [key for key in self._store.keys() if key >= start_key and key < end_key]
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async def delete(self, key: str) -> None:
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del self._store[key]
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_KVSTORE_BACKENDS: dict[str, KVStoreConfig] = {}
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def register_kvstore_backends(backends: dict[str, StorageBackendConfig]) -> None:
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"""Register the set of available KV store backends for reference resolution."""
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global _KVSTORE_BACKENDS
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_KVSTORE_BACKENDS.clear()
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for name, cfg in backends.items():
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_KVSTORE_BACKENDS[name] = cfg
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async def kvstore_impl(reference: KVStoreReference) -> KVStore:
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backend_name = reference.backend
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backend_config = _KVSTORE_BACKENDS.get(backend_name)
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if backend_config is None:
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raise ValueError(f"Unknown KVStore backend '{backend_name}'. Registered backends: {sorted(_KVSTORE_BACKENDS)}")
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config = backend_config.model_copy()
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config.namespace = reference.namespace
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if config.type == StorageBackendType.KV_REDIS.value:
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from .redis import RedisKVStoreImpl
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impl = RedisKVStoreImpl(config)
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elif config.type == StorageBackendType.KV_SQLITE.value:
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from .sqlite import SqliteKVStoreImpl
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impl = SqliteKVStoreImpl(config)
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elif config.type == StorageBackendType.KV_POSTGRES.value:
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from .postgres import PostgresKVStoreImpl
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impl = PostgresKVStoreImpl(config)
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elif config.type == StorageBackendType.KV_MONGODB.value:
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from .mongodb import MongoDBKVStoreImpl
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impl = MongoDBKVStoreImpl(config)
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else:
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raise ValueError(f"Unknown kvstore type {config.type}")
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await impl.initialize()
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return impl
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