Module haystack_integrations.components.generators.ollama.generator

OllamaGenerator

Provides an interface to generate text using an LLM running on Ollama.

Usage example:

from haystack_integrations.components.generators.ollama import OllamaGenerator

generator = OllamaGenerator(model="zephyr",
                            url = "http://localhost:11434",
                            generation_kwargs={
                            "num_predict": 100,
                            "temperature": 0.9,
                            })

print(generator.run("Who is the best American actor?"))

OllamaGenerator.__init__

def __init__(model: str = "orca-mini",
             url: str = "http://localhost:11434",
             generation_kwargs: Optional[Dict[str, Any]] = None,
             system_prompt: Optional[str] = None,
             template: Optional[str] = None,
             raw: bool = False,
             timeout: int = 120,
             keep_alive: Optional[Union[float, str]] = None,
             streaming_callback: Optional[Callable[[StreamingChunk],
                                                   None]] = None)

Arguments:

• model: The name of the model to use. The model should be available in the running Ollama instance.
• url: The URL of a running Ollama instance.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, and others. See the available arguments in Ollama docs.
• system_prompt: Optional system message (overrides what is defined in the Ollama Modelfile).
• template: The full prompt template (overrides what is defined in the Ollama Modelfile).
• raw: If True, no formatting will be applied to the prompt. You may choose to use the raw parameter if you are specifying a full templated prompt in your API request.
• timeout: The number of seconds before throwing a timeout error from the Ollama API.
• streaming_callback: A callback function that is called when a new token is received from the stream. The callback function accepts StreamingChunk as an argument.
• keep_alive: The option that controls how long the model will stay loaded into memory following the request. If not set, it will use the default value from the Ollama (5 minutes). The value can be set to:
• a duration string (such as "10m" or "24h")
• a number in seconds (such as 3600)
• any negative number which will keep the model loaded in memory (e.g. -1 or "-1m")
• '0' which will unload the model immediately after generating a response.

OllamaGenerator.to_dict

def to_dict() -> Dict[str, Any]

Serializes the component to a dictionary.

Returns:

Dictionary with serialized data.

OllamaGenerator.from_dict

@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "OllamaGenerator"

Deserializes the component from a dictionary.

Arguments:

• data: Dictionary to deserialize from.

Returns:

Deserialized component.

OllamaGenerator.run

@component.output_types(replies=List[str], meta=List[Dict[str, Any]])
def run(
    prompt: str,
    generation_kwargs: Optional[Dict[str, Any]] = None,
    *,
    streaming_callback: Optional[Callable[[StreamingChunk], None]] = None
) -> Dict[str, List[Any]]

Runs an Ollama Model on the given prompt.

Arguments:

• prompt: The prompt to generate a response for.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, and others. See the available arguments in Ollama docs.
• streaming_callback: A callback function that is called when a new token is received from the stream.

Returns:

A dictionary with the following keys:

• replies: The responses from the model
• meta: The metadata collected during the run

Module haystack_integrations.components.generators.ollama.chat.chat_generator

OllamaChatGenerator

Haystack generator for models served by Ollama (https://ollama.ai).

* Fully supports streaming.
* Correctly passes tool-calls to Haystack when `stream=True`.

Usage example:
```python
from haystack.components.generators.utils import print_streaming_chunk
from haystack.components.agents import Agent
from haystack_integrations.components.generators.ollama.chat import OllamaChatGenerator
from haystack.dataclasses import ChatMessage
from haystack.tools import Tool

def echo(query: str) -> str:
    print(f"Tool executed with QUERY: {query}")
    return query

echo_tool = Tool(
    name="echo_tool",
    description="Echoes the query (demo tool).",
    function=echo,
    parameters={"query": {"type": "string", "description": "Search query"}},
)
agent = Agent(
    chat_generator=OllamaChatGenerator(model="mistral-small3.1:24b"),
    tools=[echo_tool],
    system_prompt=(
        "Use tool to print the query to test tools. Do not answer the question, just send the query to the tool"
    ),
    max_agent_steps=5,
    raise_on_tool_invocation_failure=True,
    streaming_callback=print_streaming_chunk,
)
messages = [ChatMessage.from_user("This is stream test of tool usage")]
result = agent.run(messages=messages)
for message in result["messages"]:
    print("

======") if message.role == "system": continue elif message.role == "tool": print(f"{message.role}:") print(f"Tool Results: {[tool.result for tool in message.tool_call_results]}") print(f"Used Tools: {[tool.origin.tool_name for tool in message.tool_call_results]} ") else: print(f"{message.role}: {message.text}") print(f"Used Tools: {[tool.tool_name for tool in message.tool_calls]} ") ```

OllamaChatGenerator.__init__

def __init__(model: str = "orca-mini",
             url: str = "http://localhost:11434",
             generation_kwargs: Optional[Dict[str, Any]] = None,
             timeout: int = 120,
             keep_alive: Optional[Union[float, str]] = None,
             streaming_callback: Optional[Callable[[StreamingChunk],
                                                   None]] = None,
             tools: Optional[Union[List[Tool], Toolset]] = None,
             response_format: Optional[Union[None, Literal["json"],
                                             JsonSchemaValue]] = None)

Arguments:

• model: The name of the model to use. The model must already be present (pulled) in the running Ollama instance.
• url: The base URL of the Ollama server (default "http://localhost:11434").
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, and others. See the available arguments in Ollama docs.
• timeout: Socket timeout in seconds for HTTP calls to Ollama.
• keep_alive: The option that controls how long the model will stay loaded into memory following the request. If not set, it will use the default value from the Ollama (5 minutes). The value can be set to:
• a duration string (such as "10m" or "24h")
• a number in seconds (such as 3600)
• any negative number which will keep the model loaded in memory (e.g. -1 or "-1m")
• '0' which will unload the model immediately after generating a response.
• streaming_callback: A callback function that is called when a new token is received from the stream. The callback function accepts StreamingChunk as an argument.
• tools: A list of haystack.tools.Tool or a haystack.tools.Toolset. Duplicate tool names raise a ValueError. Not all models support tools. For a list of models compatible with tools, see the models page.
• response_format: The format for structured model outputs. The value can be:
• None: No specific structure or format is applied to the response. The response is returned as-is.
• "json": The response is formatted as a JSON object.
• JSON Schema: The response is formatted as a JSON object that adheres to the specified JSON Schema. (needs Ollama ≥ 0.1.34)

OllamaChatGenerator.to_dict

def to_dict() -> Dict[str, Any]

Serializes the component to a dictionary.

Returns:

Dictionary with serialized data.

OllamaChatGenerator.from_dict

@classmethod
def from_dict(cls, data: Dict[str, Any]) -> "OllamaChatGenerator"

Deserializes the component from a dictionary.

Arguments:

• data: Dictionary to deserialize from.

Returns:

Deserialized component.

OllamaChatGenerator.run

@component.output_types(replies=List[ChatMessage])
def run(
    messages: List[ChatMessage],
    generation_kwargs: Optional[Dict[str, Any]] = None,
    tools: Optional[Union[List[Tool], Toolset]] = None,
    *,
    streaming_callback: Optional[Callable[[StreamingChunk], None]] = None
) -> Dict[str, List[ChatMessage]]

Runs an Ollama Model on a given chat history.

Arguments:

• messages: A list of ChatMessage instances representing the input messages.
• generation_kwargs: Per-call overrides for Ollama inference options. These are merged on top of the instance-level generation_kwargs. Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, etc. See the Ollama docs.
• tools: A list of tools or a Toolset for which the model can prepare calls. This parameter can accept either a list of Tool objects or a Toolset instance. If set, it will override the tools parameter set during component initialization.
• streaming_callback: A callable to receive StreamingChunk objects as they arrive. Supplying a callback (here or in the constructor) switches the component into streaming mode.

Returns:

A dictionary with the following keys:

• replies: A list of ChatMessages containing the model's response

Module haystack_integrations.components.embedders.ollama.document_embedder

OllamaDocumentEmbedder

Computes the embeddings of a list of Documents and stores the obtained vectors in the embedding field of each Document. It uses embedding models compatible with the Ollama Library.

Usage example:

from haystack import Document
from haystack_integrations.components.embedders.ollama import OllamaDocumentEmbedder

doc = Document(content="What do llamas say once you have thanked them? No probllama!")
document_embedder = OllamaDocumentEmbedder()

result = document_embedder.run([doc])
print(result['documents'][0].embedding)

OllamaDocumentEmbedder.__init__

def __init__(model: str = "nomic-embed-text",
             url: str = "http://localhost:11434",
             generation_kwargs: Optional[Dict[str, Any]] = None,
             timeout: int = 120,
             prefix: str = "",
             suffix: str = "",
             progress_bar: bool = True,
             meta_fields_to_embed: Optional[List[str]] = None,
             embedding_separator: str = "\n",
             batch_size: int = 32)

Arguments:

• model: The name of the model to use. The model should be available in the running Ollama instance.
• url: The URL of a running Ollama instance.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, and others. See the available arguments in Ollama docs.
• timeout: The number of seconds before throwing a timeout error from the Ollama API.
• prefix: A string to add at the beginning of each text.
• suffix: A string to add at the end of each text.
• progress_bar: If True, shows a progress bar when running.
• meta_fields_to_embed: List of metadata fields to embed along with the document text.
• embedding_separator: Separator used to concatenate the metadata fields to the document text.
• batch_size: Number of documents to process at once.

OllamaDocumentEmbedder.run

@component.output_types(documents=List[Document], meta=Dict[str, Any])
def run(
    documents: List[Document],
    generation_kwargs: Optional[Dict[str, Any]] = None
) -> Dict[str, Union[List[Document], Dict[str, Any]]]

Runs an Ollama Model to compute embeddings of the provided documents.

Arguments:

• documents: Documents to be converted to an embedding.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, etc. See the Ollama docs.

Returns:

A dictionary with the following keys:

• documents: Documents with embedding information attached
• meta: The metadata collected during the embedding process

OllamaDocumentEmbedder.run_async

@component.output_types(documents=List[Document], meta=Dict[str, Any])
async def run_async(
    documents: List[Document],
    generation_kwargs: Optional[Dict[str, Any]] = None
) -> Dict[str, Union[List[Document], Dict[str, Any]]]

Asynchronously run an Ollama Model to compute embeddings of the provided documents.

Arguments:

• documents: Documents to be converted to an embedding.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, etc. See the Ollama docs.

Returns:

A dictionary with the following keys:

• documents: Documents with embedding information attached
• meta: The metadata collected during the embedding process

Module haystack_integrations.components.embedders.ollama.text_embedder

OllamaTextEmbedder

Computes the embeddings of a list of Documents and stores the obtained vectors in the embedding field of each Document. It uses embedding models compatible with the Ollama Library.

Usage example:

from haystack_integrations.components.embedders.ollama import OllamaTextEmbedder

embedder = OllamaTextEmbedder()
result = embedder.run(text="What do llamas say once you have thanked them? No probllama!")
print(result['embedding'])

OllamaTextEmbedder.__init__

def __init__(model: str = "nomic-embed-text",
             url: str = "http://localhost:11434",
             generation_kwargs: Optional[Dict[str, Any]] = None,
             timeout: int = 120)

Arguments:

• model: The name of the model to use. The model should be available in the running Ollama instance.
• url: The URL of a running Ollama instance.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, and others. See the available arguments in Ollama docs.
• timeout: The number of seconds before throwing a timeout error from the Ollama API.

OllamaTextEmbedder.run

@component.output_types(embedding=List[float], meta=Dict[str, Any])
def run(
    text: str,
    generation_kwargs: Optional[Dict[str, Any]] = None
) -> Dict[str, Union[List[float], Dict[str, Any]]]

Runs an Ollama Model to compute embeddings of the provided text.

Arguments:

• text: Text to be converted to an embedding.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, etc. See the Ollama docs.

Returns:

A dictionary with the following keys:

• embedding: The computed embeddings
• meta: The metadata collected during the embedding process

OllamaTextEmbedder.run_async

@component.output_types(embedding=List[float], meta=Dict[str, Any])
async def run_async(
    text: str,
    generation_kwargs: Optional[Dict[str, Any]] = None
) -> Dict[str, Union[List[float], Dict[str, Any]]]

Asynchronously run an Ollama Model to compute embeddings of the provided text.

Arguments:

• text: Text to be converted to an embedding.
• generation_kwargs: Optional arguments to pass to the Ollama generation endpoint, such as temperature, top_p, etc. See the Ollama docs.

Returns:

A dictionary with the following keys:

• embedding: The computed embeddings
• meta: The metadata collected during the embedding process