Adding Native OpenSearch support for Mem0 (#2211)

mem0/configs/vector_stores/opensearch.py

@@ -0,0 +1,42 @@
+from typing import Any, Dict, Optional
+
+from pydantic import BaseModel, Field, model_validator
+
+
+class OpenSearchConfig(BaseModel):
+    collection_name: str = Field("mem0", description="Name of the index")
+    host: str = Field("localhost", description="OpenSearch host")
+    port: int = Field(9200, description="OpenSearch port")
+    user: Optional[str] = Field(None, description="Username for authentication")
+    password: Optional[str] = Field(None, description="Password for authentication")
+    api_key: Optional[str] = Field(None, description="API key for authentication (if applicable)")
+    embedding_model_dims: int = Field(1536, description="Dimension of the embedding vector")
+    verify_certs: bool = Field(False, description="Verify SSL certificates (default False for OpenSearch)")
+    use_ssl: bool = Field(False, description="Use SSL for connection (default False for OpenSearch)")
+    auto_create_index: bool = Field(True, description="Automatically create index during initialization")
+
+    @model_validator(mode="before")
+    @classmethod
+    def validate_auth(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+        # Check if host is provided
+        if not values.get("host"):
+            raise ValueError("Host must be provided for OpenSearch")
+
+        # Authentication: Either API key or user/password must be provided
+        if not any([values.get("api_key"), (values.get("user") and values.get("password"))]):
+            raise ValueError("Either api_key or user/password must be provided for OpenSearch authentication")
+
+        return values
+
+    @model_validator(mode="before")
+    @classmethod
+    def validate_extra_fields(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+        allowed_fields = set(cls.model_fields.keys())
+        input_fields = set(values.keys())
+        extra_fields = input_fields - allowed_fields
+        if extra_fields:
+            raise ValueError(
+                f"Extra fields not allowed: {', '.join(extra_fields)}. "
+                f"Allowed fields: {', '.join(allowed_fields)}"
+            )
+        return values