ollamazure

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Overview • Usage • Azure OpenAI compatibility • Sample code

Overview

ollamazure is a local server that emulates Azure OpenAI API on your local machine using Ollama and open-source models.

Using this tool, you can run your own local server that emulates the Azure OpenAI API, allowing you to test your code locally without incurring costs or being rate-limited. This is especially useful for development and testing purposes, or when you need to work offline.

By default, phi3 is used as the model for completions, and all-minilm:l6-v2 for embeddings. You can change these models using the configuration options.

Note

This tool use different models than Azure OpenAI, so you should expect differences in results accuracy and performance. However, the API is compatible so you can use the same code to interact with it.

Usage

You need Node.js v20+ and Ollama installed on your machine to use this tool.

You can start the emulator directly using npx without installing it:

npx ollamazure

Once the server is started, leave it open in a terminal window and you can use the Azure OpenAI API to interact with it. You can find sample code for different languages and frameworks in the sample code section.

For example, if you have an existing project that uses the Azure OpenAI SDK, you can point it to your local server by setting the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 without changing the rest of your code.

Installation

npm install -g ollamazure

Once the installation is completed, start the emulator by running the following command in a terminal:

ollamazure
# or use the shorter alias `oaz`

Configuration options

ollamazure --help
Usage: ollamazure [options]

Emulates Azure OpenAI API on your local machine using Ollama and open-source models.

Options:
  --verbose                  show detailed logs
  -y, --yes                  do not ask for confirmation (default: false)
  -m, --model <name>         model to use for chat and text completions (default: "phi3")
  -e, --embeddings <name>    model to use for embeddings (default: "all-minilm:l6-v2")
  -d, --use-deployment       use deployment name as model name (default: false)
  -h, --host <ip>            host to bind to (default: "localhost")
  -p, --port <number>        port to use (default: 4041)
  -o, --ollama-url <number>  ollama base url (default: "http://localhost:11434")
  -v, --version              show the current version
  --help                     display help for command

Azure OpenAI compatibility

Feature	Supported / with streaming
Completions	✅ / ✅
Chat completions	✅ / ✅
Embeddings	✅ / -
JSON mode	✅ / ✅
Function calling	⛔ / ⛔
Reproducible outputs	✅ / ✅
Vision	⛔ / ⛔
Assistants	⛔ / ⛔

Unimplemented features are currently not supported by Ollama, but are being worked on and may be added in the future.

Sample code

See all code examples in the samples folder.

JavaScript

Azure OpenAI SDK

import { AzureOpenAI } from 'openai';

const openai = new AzureOpenAI({
  // This is where you point to your local server
  endpoint: 'http://localhost:4041',

  // Parameters below must be provided but are not used by the local server
  apiKey: '123456',
  apiVersion: '2024-02-01',
  deployment: 'gpt-4',
});

const chatCompletion = await openai.chat.completions.create({
  messages: [{ role: 'user', content: 'Say hello!' }],
});

console.log('Chat completion: ' + chatCompletion.choices[0]!.message?.content);

Alternatively, you can set the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity, this will work as well unless you're in a local container. In that case, you can use a dummy function () => '1' for the the azureADTokenProvider parameter in the constructor.

LangChain.js

import { AzureChatOpenAI } from '@langchain/openai';

// Chat completion
const model = new AzureChatOpenAI({
  // This is where you point to your local server
  azureOpenAIBasePath: 'http://localhost:4041/openai/deployments',

  // Parameters below must be provided but are not used by the local server
  azureOpenAIApiKey: '123456',
  azureOpenAIApiVersion: '2024-02-01',
  azureOpenAIApiDeploymentName: 'gpt-4'
});

const completion = await model.invoke([{ type: 'human', content: 'Say hello!' }]);
console.log(completion.content);

Alternatively, you can set the AZURE_OPENAI_BASE_PATH environment variable to http://localhost:4041/openai/deployments instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity this will work the same unless you're in a local container. In that case, you can use a dummy function () => '1' for the the azureADTokenProvider parameter in the constructor.

LlamaIndex.TS

import { OpenAI } from "llamaindex";

// Chat completion
const llm = new OpenAI({
  azure: {
    // This is where you point to your local server
    endpoint: 'http://localhost:4041',

    // Parameters below must be provided but are not used by the local server
    apiKey: '123456',
    apiVersion: '2024-02-01',
    deployment: 'gpt-4'
  }
});

const chatCompletion = await llm.chat({
  messages: [{ role: 'user', content: 'Say hello!' }]
});

console.log(chatCompletion.message.content);

Alternatively, you can set the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity, this will work as well unless you're in a local container. In that case, you can use a dummy function () => '1' for the the azureADTokenProvider parameter in the constructor.

Python

Azure OpenAI SDK

from openai import AzureOpenAI

openai = AzureOpenAI(
    # This is where you point to your local server
    azure_endpoint="http://localhost:4041",

    # Parameters below must be provided but are not used by the local server
    # api_key="123456",
    api_version="2024-02-01"
)

# Chat completion
chat_completion = openai.chat.completions.create(
    # Model must be provided but is not used by the local server
    model="gpt-4",
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user", "content": "Say hello!"}
    ]
)

print(chat_completion.choices[0].message.content)

Alternatively, you can set the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity, this will work as well unless you're in a local container. In that case, you can use a dummy function lambda:"1" for the the azure_ad_token_provider parameter in the constructor.

LangChain

from langchain_openai import AzureChatOpenAI

# Chat completion
model = AzureChatOpenAI(
    # This is where you point to your local server
    azure_endpoint="http://localhost:4041",

    # Parameters below must be provided but are not used by the local server
    api_key="123456",
    api_version="2024-02-01",
    azure_deployment="gpt-4"
)

chat_completion = model.invoke([{"type": "human", "content": "Say hello!"}])
print(chat_completion.content)

Alternatively, you can set the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity, this will work as well unless you're in a local container. In that case, you can use a dummy function lambda:"1" for the the azure_ad_token_provider parameter in the constructor.

LlamaIndex

from llama_index.core.llms import ChatMessage
from llama_index.llms.azure_openai import AzureOpenAI

# Chat completion
llm = AzureOpenAI(
    # This is where you point to your local server
    azure_endpoint="http://localhost:4041",

    # Parameters below must be provided but are not used by the local server
    api_key="123456",
    api_version="2024-02-01",
    engine="gpt-4"
)

chat_completion = llm.chat([ChatMessage(role="user", content="Say hello!")])
print(chat_completion.message.content)

Alternatively, you can set the AZURE_OPENAI_ENDPOINT environment variable to http://localhost:4041 instead of passing it to the constructor. Everything else will work the same.

If you're using managed identity, this will work as well unless you're in a local container. In that case, you can use a dummy function lambda:"1" for the the azure_ad_token_provider parameter in the constructor.

C#

Azure OpenAI SDK

using Azure;
using Azure.AI.OpenAI;
using OpenAI.Chat;

// Chat completion
AzureOpenAIClient azureClient = new(
    new Uri("http://localhost:4041"),
    // Must be provided but are not used by the local server
    new AzureKeyCredential("123456"));

ChatClient chatClient = azureClient.GetChatClient("gpt-4");

ChatCompletion completion = chatClient.CompleteChat([new UserChatMessage("Say hello!")]);

Console.WriteLine(completion.Content[0].Text);

Semantic Kernel

using Microsoft.SemanticKernel;
using Microsoft.SemanticKernel.Connectors.OpenAI;

var builder = Kernel.CreateBuilder();

// Chat completion
builder.AddAzureOpenAIChatCompletion(
    "gpt-4",                   // Deployment Name (not used by the local server)
    "http://localhost:4041",   // Azure OpenAI Endpoint 
    "123456");                 // Azure OpenAI Key (not used by the local server)

var kernel = builder.Build();
var chatFunction = kernel.CreateFunctionFromPrompt(@"{{$input}}");

var chatCompletion = await kernel.InvokeAsync(chatFunction, new() { ["input"] = "Say hello!" });

Console.WriteLine(chatCompletion);