basilica-sdk 0.19.0

Python SDK for deploying containerized applications on the Basilica GPU cloud

Basilica Python SDK

The official Python SDK for deploying containerized applications on the Basilica GPU cloud platform.

Installation

pip install basilica-sdk

Requirements: Python 3.10+

Quick Start

1. Get an API Token

# Install the Basilica CLI
pip install basilica-cli

# Create an API token
basilica tokens create

# Set the environment variable
export BASILICA_API_TOKEN="basilica_..."

2. Deploy Your First App

from basilica import BasilicaClient

client = BasilicaClient()

# Deploy inline Python code
deployment = client.deploy(
    name="hello",
    source="""
from http.server import HTTPServer, BaseHTTPRequestHandler

class Handler(BaseHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.end_headers()
        self.wfile.write(b'Hello from Basilica!')

HTTPServer(('', 8000), Handler).serve_forever()
""",
    port=8000,
    ttl_seconds=600,  # Auto-delete after 10 minutes
)

print(f"Live at: {deployment.url}")

3. Deploy a FastAPI Application

from basilica import BasilicaClient

client = BasilicaClient()

deployment = client.deploy(
    name="my-api",
    source="""
from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def root():
    return {"message": "Hello from FastAPI!"}

@app.get("/items/{item_id}")
def get_item(item_id: int):
    return {"item_id": item_id, "name": f"Item {item_id}"}

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8000)
""",
    port=8000,
    pip_packages=["fastapi", "uvicorn"],
    ttl_seconds=600,
)

print(f"API docs: {deployment.url}/docs")

Features

High-Level API

The SDK provides a simple deploy() method that handles:

• Source code packaging
• Container image selection
• Dependency installation
• Health checking and readiness waiting
• Public URL provisioning

deployment = client.deploy(
    name="my-app",           # Deployment name
    source="app.py",         # File path or inline code
    port=8000,               # Application port
    pip_packages=["flask"],  # Dependencies
    storage=True,            # Persistent storage at /data
    ttl_seconds=3600,        # Auto-cleanup (optional)
)

print(deployment.url)        # Public URL
print(deployment.logs())     # Application logs
deployment.delete()          # Manual cleanup

Decorator API

Define deployments as decorated functions:

import basilica

@basilica.deployment(
    name="my-service",
    port=8000,
    pip_packages=["fastapi", "uvicorn"],
    ttl_seconds=600,
)
def serve():
    from fastapi import FastAPI
    import uvicorn

    app = FastAPI()

    @app.get("/")
    def root():
        return {"status": "running"}

    uvicorn.run(app, host="0.0.0.0", port=8000)

# Deploy by calling the function
deployment = serve()
print(f"Live at: {deployment.url}")

GPU Deployments

Deploy applications with GPU access:

deployment = client.deploy(
    name="pytorch-inference",
    source="inference.py",
    image="pytorch/pytorch:2.1.0-cuda12.1-cudnn8-runtime",
    port=8000,
    gpu_count=1,
    gpu_models=["NVIDIA-RTX-A4000"],  # Optional: specific GPU models
    memory="8Gi",
    timeout=300,
)

Persistent Storage

Enable persistent storage mounted at /data:

# Simple: Enable storage at /data
deployment = client.deploy(
    name="stateful-app",
    source="app.py",
    port=8000,
    storage=True,
)

# Custom mount path
deployment = client.deploy(
    name="stateful-app",
    source="app.py",
    port=8000,
    storage="/custom/path",
)

Using volumes with the decorator API:

import basilica

cache = basilica.Volume.from_name("my-cache", create_if_missing=True)

@basilica.deployment(
    name="app-with-storage",
    port=8000,
    volumes={"/data": cache},
)
def serve():
    # Your app can read/write to /data
    pass

Health Checks

Large model deployments (vLLM, SGLang) can take minutes to download and load into GPU memory. Configure custom health check probes to prevent Kubernetes from killing pods before models are ready:

from basilica import BasilicaClient, HealthCheckConfig, ProbeConfig

client = BasilicaClient()

# Deploy SGLang with a 20-minute startup tolerance
deployment = client.deploy_sglang(
    model="Qwen/Qwen2.5-3B-Instruct",
    health_check=HealthCheckConfig(
        startup=ProbeConfig(
            path="/health",
            port=30000,
            initial_delay_seconds=0,
            period_seconds=10,
            timeout_seconds=5,
            failure_threshold=120,  # 120 * 10s = 20 minutes
        ),
        liveness=ProbeConfig(
            path="/health",
            port=30000,
            initial_delay_seconds=120,
            period_seconds=30,
            timeout_seconds=10,
            failure_threshold=5,
        ),
        readiness=ProbeConfig(
            path="/health",
            port=30000,
            initial_delay_seconds=60,
            period_seconds=15,
            timeout_seconds=10,
            failure_threshold=5,
        ),
    ),
    timeout=1200,
)

deploy_vllm() and deploy_sglang() include sensible defaults (10-minute startup tolerance) when no health_check is provided. For very large models, pass your own HealthCheckConfig to extend the startup window.

Health checks work with any deployment method:

# Generic deploy()
deployment = client.deploy(
    name="my-gpu-app",
    source="app.py",
    port=8000,
    gpu_count=1,
    health_check=HealthCheckConfig(
        startup=ProbeConfig(path="/ready", port=8000, failure_threshold=60),
    ),
)

# Decorator API
@basilica.deployment(
    name="my-service",
    port=8000,
    health_check=HealthCheckConfig(
        startup=ProbeConfig(path="/health", port=8000, failure_threshold=60),
    ),
)
def serve():
    ...

ProbeConfig fields:

• path: HTTP endpoint to probe (e.g. "/health")
• port: Port to probe (defaults to container port if None)
• initial_delay_seconds: Seconds before first probe (default: 30)
• period_seconds: Interval between probes (default: 10)
• timeout_seconds: Probe timeout (default: 5)
• failure_threshold: Consecutive failures before action (default: 3)

Pre-built Container Images

Deploy any Docker image:

deployment = client.deploy(
    name="nginx",
    image="nginxinc/nginx-unprivileged:alpine",
    port=8080,
    replicas=1,
    cpu="250m",
    memory="256Mi",
)

API Reference

BasilicaClient

class BasilicaClient:
    def __init__(
        self,
        base_url: str = None,  # Default: https://api.basilica.ai
        api_key: str = None,   # Default: BASILICA_API_TOKEN env var
    ): ...

deploy()

The primary method for deploying applications:

def deploy(
    name: str,                              # Deployment name (DNS-safe)
    source: Optional[str | Path] = None,    # File path or inline code
    image: str = "python:3.11-slim",        # Container image
    port: int = 8000,                       # Application port
    env: Optional[Dict[str, str]] = None,   # Environment variables
    cpu: str = "500m",                      # CPU allocation
    memory: str = "512Mi",                  # Memory allocation
    storage: Union[bool, str] = False,      # Persistent storage
    gpu_count: Optional[int] = None,        # Number of GPUs
    gpu_models: Optional[List[str]] = None, # GPU model requirements
    min_cuda_version: Optional[str] = None, # Minimum CUDA version
    min_gpu_memory_gb: Optional[int] = None,# Minimum GPU VRAM
    replicas: int = 1,                      # Number of instances
    ttl_seconds: Optional[int] = None,      # Auto-delete timeout
    public: bool = True,                    # Create public URL
    timeout: int = 300,                     # Deployment timeout
    pip_packages: Optional[List[str]] = None,  # pip dependencies
    health_check: Optional[HealthCheckConfig] = None,  # Custom health probes
) -> Deployment

Deployment Object

class Deployment:
    name: str                    # Deployment name
    url: str                     # Public URL
    namespace: str               # Kubernetes namespace
    user_id: str                 # Owner user ID
    state: str                   # Current state
    created_at: str              # Creation timestamp

    def status() -> DeploymentStatus     # Get detailed status
    def logs(tail=None) -> str           # Get application logs
    def wait_until_ready(timeout=300)    # Block until ready
    def delete() -> None                 # Delete deployment
    def refresh() -> Deployment          # Refresh state

DeploymentStatus

@dataclass
class DeploymentStatus:
    state: str                   # Pending, Active, Running, Failed, Terminating
    replicas_ready: int          # Ready replica count
    replicas_desired: int        # Desired replica count
    message: Optional[str]       # Status message
    phase: Optional[str]         # Detailed phase
    progress: Optional[ProgressInfo]  # Progress information

    @property
    def is_ready(self) -> bool   # Check if fully ready

    @property
    def is_failed(self) -> bool  # Check if failed

    @property
    def is_pending(self) -> bool # Check if still starting

Exception Handling

The SDK provides a comprehensive exception hierarchy:

from basilica import (
    BasilicaError,        # Base exception
    AuthenticationError,  # Invalid/missing token
    AuthorizationError,   # Permission denied
    ValidationError,      # Invalid parameters
    DeploymentError,      # Base deployment error
    DeploymentNotFound,   # Deployment doesn't exist
    DeploymentTimeout,    # Timeout waiting for ready
    DeploymentFailed,     # Deployment crashed
    ResourceError,        # Resource unavailable
    StorageError,         # Storage configuration error
    NetworkError,         # API communication error
    RateLimitError,       # Rate limit exceeded
    SourceError,          # Source file error
)

try:
    deployment = client.deploy(...)
except DeploymentTimeout:
    print("Deployment took too long to start")
except DeploymentFailed as e:
    print(f"Deployment failed: {e}")
except AuthenticationError:
    print("Invalid API token")

Low-Level API

For advanced use cases, access the low-level API methods:

# Create deployment with full control
response = client.create_deployment(
    instance_name="my-app",
    image="python:3.11-slim",
    command=["python", "-m", "http.server", "8000"],
    port=8000,
    cpu="1",
    memory="1Gi",
)

# Get deployment details
response = client.get_deployment("my-app")

# Delete deployment
client.delete_deployment("my-app")

# List all deployments
response = client.list_deployments()

# Get logs
logs = client.get_deployment_logs("my-app", tail=100)

GPU Rentals (Legacy API)

For direct GPU node access via SSH:

# List available nodes
nodes = client.list_nodes(gpu_type="A100", min_gpu_count=1)

# Start a rental
rental = client.start_rental(
    gpu_type="A100",
    container_image="pytorch/pytorch:latest",
)
print(f"Rental ID: {rental.rental_id}")

# Get SSH credentials
status = client.get_rental(rental.rental_id)
if status.ssh_credentials:
    print(f"SSH: {status.ssh_credentials.username}@{status.ssh_credentials.host}")

# Stop rental
client.stop_rental(rental.rental_id)

Environment Variables

Variable	Description	Default
BASILICA_API_TOKEN	API authentication token	Required
BASILICA_API_URL	API endpoint URL	https://api.basilica.ai

Examples

For complete working examples, see the examples directory:

Example	Description
01_hello_world.py	Simplest deployment with inline code
02_with_storage.py	Persistent storage example
03_fastapi.py	Production FastAPI deployment
04_gpu.py	GPU/CUDA deployment with PyTorch
05_decorator_*.py	Decorator API patterns
06_vllm_qwen.py	LLM inference with vLLM
07_sglang_model.py	SGLang model serving
08_external_file.py	Deploy from external Python file
09_container_image.py	Pre-built Docker image deployment
10_custom_docker/	Multi-file project with Dockerfile
11_agentgym.py	RL environment deployment
12_lobe_chat.py	Self-hosted chat UI
13_lobe_chat_vllm.py	Full AI stack (LobeChat + vLLM)
14_streamlit.py	Interactive Streamlit app
deploy_sglang_health_check.py	SGLang with custom health check probes

Development

Building from Source

git clone https://github.com/one-covenant/basilica.git
cd basilica/crates/basilica-sdk-python

# Create virtual environment
python -m venv .venv
source .venv/bin/activate

# Install maturin and build
pip install maturin
maturin develop

# Test import
python -c "from basilica import BasilicaClient; print('OK')"

Running Tests

pip install pytest
pytest tests/ -v

Architecture

The SDK is built with:

• PyO3: Rust bindings for high-performance HTTP operations
• Async runtime: Tokio-based async operations exposed as sync Python calls
• Type safety: Full type hints with IDE support

For detailed architecture documentation, see PYTHON-SDK-ARCHITECTURE.md.

License

MIT OR Apache-2.0

Links

• Documentation
• PyPI Package
• GitHub Repository
• Issue Tracker
• Changelog