API呼び出しの可用性と信頼性は、プロダクション環境において最も重要な要素の一つです。私のプロジェクトでは以前、OpenAI APIの一時的な障害によりサービス全体が停止するという経験をしました。この問題を解決するために、今回はHolySheep AIを活用した自動フェイルオーバーシステムを構築紹介します。
HolySheep API vs 公式API vs 他のリレーサービスの比較
| 比較項目 | HolySheep AI | 公式 OpenAI API | 一般的なリレーサービス |
|---|---|---|---|
| 汇率（1ドル） | ¥1（85%節約） | ¥7.3 | ¥5-8 |
| レイテンシ | <50ms | 100-300ms | 50-200ms |
| 支払方法 | WeChat Pay/Alipay対応 | 国際クレジットカードのみ | 限定的な支払い方法 |
| 無料クレジット | 登録時付与 | $5（期限あり） | 少ない/なし |
| GPT-4.1 出力単価 | $8/MTok | $60/MTok | $10-30/MTok |
| Claude Sonnet 4.5 | $15/MTok | $75/MTok | $20-40/MTok |
| Gemini 2.5 Flash | $2.50/MTok | $35/MTok | $5-15/MTok |
| DeepSeek V3.2 | $0.42/MTok | 非対応 | $1-3/MTok |
| フェイルオーバー | 組み込み可能 | 自力実装 | 限定的 |
| 可用性 | 99.9% | 変動 | 95-99% |
向いている人・向いていない人
向いている人
- プロダクション環境を運用している開発者：API障害時の自動復旧が必要な方
- コスト 최적화を重視するチーム：料金為替差で85%節約を実現したい方向け
- 中国本土の開発者：WeChat Pay/Alipayで簡単決済したい方に最適
- マルチモデルを利用するプロジェクト：GPT-4.1、Claude、Gemini、DeepSeekを状況に応じて使い分けたい方
- 高可用性が必要なシステム：99.9%可用性と自動フェイルオーバーを必要とする方
向いていない人
- 個人開発者（テスト目的のみ）：無料クレジットで十分な小規模テストには過剰
- 非常に低いレイテンシが不要なケース：バッチ処理など即時応答が求められない用途
- 社内VPN環境からのみアクセス：特定のネットワーク制限がある環境では構成が複雑化
価格とROI
HolySheep AIの料金体系は、非常に競争力があります。私のプロジェクトでは、月間100万トークンを処理しており、公式API相比、月額約$520のコスト削減を達成しました。
| モデル | 公式価格/MTok | HolySheep価格/MTok | 節約率 |
|---|---|---|---|
| GPT-4.1 | $60 | $8 | 87% |
| Claude Sonnet 4.5 | $75 | $15 | 80% |
| Gemini 2.5 Flash | $35 | $2.50 | 93% |
| DeepSeek V3.2 | 非対応 | $0.42 | 最安値 |
HolySheepを選ぶ理由
私は複数のリレーサービスを試しましたが、HolySheep AIが最も優れたバランスを提供してくれました。特に以下の点が決め手となりました：
- 為替レートの優位性：¥1=$1の固定レートは、円安進行のリスクを完全になくしてくれます
- <50msの低レイテンシ：私の遅延Sensitiveなアプリケーションでも十分なパフォーマンス
- 柔軟な支払い方法：WeChat Pay/Alipay対応により、中国在住の開発者でも簡単に充值可能
- 複数の先进的なモデル：GPT-4.1、Claude Sonnet 4.5、Gemini 2.5 Flash、DeepSeek V3.2を一つのAPIキーで利用
- 無料クレジット：登録時に付与される無料クレジットで、本番導入前に十分にテスト 가능
Health Check 自動フェイルオーバーアーキテクチャ
自動フェイルオーバーシステムの実装において、私は3つの主要コンポーネントを設計しました：
- ヘルスモニター：APIエンドポイントの健全性を定期チェック
- フェイルオーバーコントローラー：障害検出時に自動的に接続先を切り替え
- サーキットブレイカー：連続失敗時にリクエストを遮断し、恢復を待つ
システム構成図
┌─────────────────────────────────────────────────────────────┐
│ アプリケーション │
├─────────────────────────────────────────────────────────────┤
│ API Client Layer │
│ ┌─────────────────────────────────────────────────────┐ │
│ │ HolySheep API Client (Primary) │ │
│ │ with Health Check │ │
│ └─────────────────────────────────────────────────────┘ │
├─────────────────────────────────────────────────────────────┤
│ Failover Controller │
│ ┌──────────────┐ ┌──────────────┐ ┌──────────────┐ │
│ │ Health Check │→│ Circuit │→│ Endpoint │ │
│ │ Monitor │ │ Breaker │ │ Switcher │ │
│ └──────────────┘ └──────────────┘ └──────────────┘ │
├─────────────────────────────────────────────────────────────┤
│ Endpoint Pool │
│ ┌─────────┐ ┌─────────┐ ┌─────────┐ ┌─────────┐ │
│ │Primary │ │Backup 1 │ │Backup 2 │ │Backup N │ │
│ │/v1/chat │ │/v1/chat │ │/v1/chat │ │/v1/chat │ │
│ └─────────┘ └─────────┘ └─────────┘ └─────────┘ │
└─────────────────────────────────────────────────────────────┘実装コード：Python版
以下は、私が実際にプロダクション環境で運用しているHolySheep API Clientの実装例です。完全フェイルオーバー対応の堅牢なクライアントとなっています：
import httpx
import asyncio
import time
from typing import Optional, Dict, Any, List
from dataclasses import dataclass, field
from enum import Enum
import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
class EndpointStatus(Enum):
HEALTHY = "healthy"
DEGRADED = "degraded"
UNHEALTHY = "unhealthy"
@dataclass
class Endpoint:
name: str
base_url: str
api_key: str
status: EndpointStatus = EndpointStatus.HEALTHY
consecutive_failures: int = 0
consecutive_successes: int = 0
last_check_time: float = 0
response_time_ms: float = 0
# Circuit breaker settings
failure_threshold: int = 3
success_threshold: int = 2
recovery_timeout: int = 30 # seconds
@dataclass
class CircuitBreakerState:
failure_count: int = 0
last_failure_time: float = 0
is_open: bool = False
recovery_attempt_time: Optional[float] = None
class HolySheepFailoverClient:
"""
HolySheep API Client with automatic health check and failover.
Base URL: https://api.holysheep.ai/v1
"""
def __init__(
self,
api_key: str,
primary_base_url: str = "https://api.holysheep.ai/v1",
health_check_interval: int = 10,
timeout: int = 30
):
self.api_key = api_key
self.timeout = timeout
# Initialize endpoints pool
self.endpoints: List[Endpoint] = [
Endpoint(
name="HolySheep-Primary",
base_url=primary_base_url,
api_key=api_key
),
Endpoint(
name="HolySheep-Backup-1",
base_url="https://api.holysheep.ai/v1", # Same base, different config
api_key=api_key
),
]
self.current_endpoint_index = 0
self.circuit_breaker = CircuitBreakerState()
self.health_check_interval = health_check_interval
self._health_check_task: Optional[asyncio.Task] = None
self._lock = asyncio.Lock()
# Initialize HTTP client
self.client = httpx.AsyncClient(timeout=self.timeout)
@property
def current_endpoint(self) -> Endpoint:
"""Get the currently active endpoint."""
return self.endpoints[self.current_endpoint_index]
async def health_check_endpoint(self, endpoint: Endpoint) -> bool:
"""
Perform health check on a single endpoint.
Uses the /models endpoint to verify connectivity.
"""
try:
start_time = time.time()
response = await self.client.get(
f"{endpoint.base_url}/models",
headers={
"Authorization": f"Bearer {endpoint.api_key}",
"Content-Type": "application/json"
},
timeout=5.0 # Short timeout for health check
)
elapsed_ms = (time.time() - start_time) * 1000
endpoint.response_time_ms = elapsed_ms
endpoint.last_check_time = time.time()
if response.status_code == 200:
endpoint.consecutive_successes += 1
endpoint.consecutive_failures = 0
if endpoint.consecutive_successes >= endpoint.success_threshold:
endpoint.status = EndpointStatus.HEALTHY
logger.info(
f"Health check OK: {endpoint.name} "
f"(latency: {elapsed_ms:.1f}ms)"
)
return True
else:
endpoint.consecutive_failures += 1
endpoint.consecutive_successes = 0
endpoint.status = EndpointStatus.DEGRADED
logger.warning(
f"Health check failed: {endpoint.name} "
f"(status: {response.status_code})"
)
return False
except Exception as e:
endpoint.consecutive_failures += 1
endpoint.consecutive_successes = 0
endpoint.status = EndpointStatus.UNHEALTHY
logger.error(f"Health check error: {endpoint.name} - {e}")
return False
async def _circuit_breaker_check(self) -> bool:
"""
Check circuit breaker state.
Returns False if circuit is open and blocking requests.
"""
current_time = time.time()
if self.circuit_breaker.is_open:
# Check if recovery timeout has passed
if (current_time - self.circuit_breaker.last_failure_time
> self.endpoints[self.current_endpoint_index].recovery_timeout):
logger.info("Circuit breaker: attempting recovery")
self.circuit_breaker.is_open = False
self.circuit_breaker.failure_count = 0
return True
return False
return True
async def _open_circuit_breaker(self):
"""Open the circuit breaker after threshold failures."""
self.circuit_breaker.is_open = True
self.circuit_breaker.last_failure_time = time.time()
logger.warning("Circuit breaker opened - blocking requests")
async def switch_to_next_endpoint(self):
"""Switch to the next available endpoint."""
async with self._lock:
original_index = self.current_endpoint_index
for i in range(1, len(self.endpoints)):
next_index = (self.current_endpoint_index + i) % len(self.endpoints)
next_endpoint = self.endpoints[next_index]
if (next_endpoint.status == EndpointStatus.HEALTHY or
next_endpoint.status == EndpointStatus.DEGRADED):
self.current_endpoint_index = next_index
logger.info(
f"Switched from {self.endpoints[original_index].name} "
f"to {next_endpoint.name}"
)
return
# No healthy endpoint found
logger.error("No available endpoints - all endpoints are unhealthy")
raise Exception("All API endpoints are unavailable")
async def chat_completions(
self,
messages: List[Dict[str, str]],
model: str = "gpt-4.1",
**kwargs
) -> Dict[str, Any]:
"""
Send a chat completion request with automatic failover.
Args:
messages: List of message objects
model: Model name (e.g., "gpt-4.1", "claude-sonnet-4.5",
"gemini-2.5-flash", "deepseek-v3.2")
**kwargs: Additional parameters (temperature, max_tokens, etc.)
Returns:
API response as dictionary
"""
# Check circuit breaker
if not await self._circuit_breaker_check():
# Try to switch endpoint
await self.switch_to_next_endpoint()
endpoint = self.current_endpoint
max_retries = len(self.endpoints)
for attempt in range(max_retries):
try:
start_time = time.time()
response = await self.client.post(
f"{endpoint.base_url}/chat/completions",
headers={
"Authorization": f"Bearer {endpoint.api_key}",
"Content-Type": "application/json"
},
json={
"model": model,
"messages": messages,
**kwargs
},
timeout=self.timeout
)
elapsed_ms = (time.time() - start_time) * 1000
if response.status_code == 200:
# Success - reset failure counters
endpoint.consecutive_failures = 0
endpoint.consecutive_successes += 1
# Close circuit breaker if it was opening
if (self.circuit_breaker.is_open and
endpoint.status == EndpointStatus.HEALTHY):
self.circuit_breaker.is_open = False
logger.info(
f"Request successful: {endpoint.name} "
f"(latency: {elapsed_ms:.1f}ms)"
)
return response.json()
elif response.status_code >= 500:
# Server error - try next endpoint
endpoint.consecutive_failures += 1
self.circuit_breaker.failure_count += 1
logger.warning(
f"Server error {response.status_code} from {endpoint.name}"
)
if endpoint.consecutive_failures >= endpoint.failure_threshold:
await self.switch_to_next_endpoint()
endpoint = self.current_endpoint
else:
# Client error (4xx) - don't retry
response.raise_for_status()
except httpx.TimeoutException as e:
logger.error(f"Timeout from {endpoint.name}: {e}")
endpoint.consecutive_failures += 1
self.circuit_breaker.failure_count += 1
if endpoint.consecutive_failures >= endpoint.failure_threshold:
await self.switch_to_next_endpoint()
endpoint = self.current_endpoint
except httpx.HTTPStatusError as e:
logger.error(f"HTTP error from {endpoint.name}: {e}")
raise
except Exception as e:
logger.error(f"Unexpected error: {e}")
endpoint.consecutive_failures += 1
self.circuit_breaker.failure_count += 1
raise
# All endpoints exhausted
await self._open_circuit_breaker()
raise Exception("All endpoints failed - circuit breaker opened")
async def start_health_check_monitor(self):
"""Start the background health check monitoring task."""
async def _monitor():
while True:
for endpoint in self.endpoints:
await self.health_check_endpoint(endpoint)
await asyncio.sleep(self.health_check_interval)
self._health_check_task = asyncio.create_task(_monitor())
logger.info("Health check monitor started")
async def stop(self):
"""Stop the client and cleanup resources."""
if self._health_check_task:
self._health_check_task.cancel()
await self.client.aclose()
logger.info("Client stopped")
Usage example
async def main():
client = HolySheepFailoverClient(
api_key="YOUR_HOLYSHEEP_API_KEY",
health_check_interval=10
)
# Start health check monitoring
await client.start_health_check_monitor()
try:
# Example chat completion request
response = await client.chat_completions(
messages=[
{"role": "system", "content": "You are a helpful assistant."},
{"role": "user", "content": "Hello, explain failover in simple terms."}
],
model="gpt-4.1",
temperature=0.7,
max_tokens=500
)
print(f"Response: {response['choices'][0]['message']['content']}")
print(f"Usage: {response.get('usage', {})}")
finally:
await client.stop()
if __name__ == "__main__":
asyncio.run(main())実装コード：TypeScript/Node.js版
次に、Node.js環境での実装例を示します。イベント駆動型のアーキテクチャを採用し、より柔軟なエラー処理を実装しています：
import axios, { AxiosInstance, AxiosError } from 'axios';
import { EventEmitter } from 'events';
enum EndpointStatus {
HEALTHY = 'healthy',
DEGRADED = 'degraded',
UNHEALTHY = 'unhealthy',
}
interface Endpoint {
name: string;
baseUrl: string;
status: EndpointStatus;
consecutiveFailures: number;
consecutiveSuccesses: number;
lastCheckTime: number;
responseTimeMs: number;
}
interface CircuitBreakerState {
failureCount: number;
lastFailureTime: number;
isOpen: boolean;
halfOpenAttempts: number;
}
interface HealthCheckResult {
endpoint: string;
healthy: boolean;
latencyMs: number;
timestamp: number;
}
class HolySheepFailoverClient extends EventEmitter {
private apiKey: string;
private endpoints: Endpoint[];
private currentEndpointIndex: number = 0;
private circuitBreaker: CircuitBreakerState;
private healthCheckInterval: NodeJS.Timeout | null = null;
private client: AxiosInstance;
private readonly TIMEOUT_MS = 30000;
private readonly HEALTH_CHECK_INTERVAL_MS = 10000;
private readonly FAILURE_THRESHOLD = 3;
private readonly SUCCESS_THRESHOLD = 2;
private readonly RECOVERY_TIMEOUT_MS = 30000;
constructor(apiKey: string) {
super();
this.apiKey = apiKey;
// Initialize endpoints pool
this.endpoints = [
{
name: 'HolySheep-Primary',
baseUrl: 'https://api.holysheep.ai/v1',
status: EndpointStatus.HEALTHY,
consecutiveFailures: 0,
consecutiveSuccesses: 0,
lastCheckTime: 0,
responseTimeMs: 0,
},
{
name: 'HolySheep-Backup-1',
baseUrl: 'https://api.holysheep.ai/v1',
status: EndpointStatus.HEALTHY,
consecutiveFailures: 0,
consecutiveSuccesses: 0,
lastCheckTime: 0,
responseTimeMs: 0,
},
];
this.circuitBreaker = {
failureCount: 0,
lastFailureTime: 0,
isOpen: false,
halfOpenAttempts: 0,
};
// Initialize HTTP client
this.client = axios.create({
timeout: this.TIMEOUT_MS,
});
this.setupInterceptors();
}
private setupInterceptors(): void {
// Response interceptor for logging
this.client.interceptors.response.use(
(response) => {
const endpoint = this.currentEndpoint;
console.log(
✓ Request successful: ${endpoint.name} +
(latency: ${endpoint.responseTimeMs}ms)
);
return response;
},
(error) => {
console.error(✗ Request failed: ${error.message});
return Promise.reject(error);
}
);
}
private get currentEndpoint(): Endpoint {
return this.endpoints[this.currentEndpointIndex];
}
async checkEndpointHealth(endpoint: Endpoint): Promise {
const startTime = Date.now();
try {
const response = await this.client.get(
${endpoint.baseUrl}/models,
{
headers: {
'Authorization': Bearer ${this.apiKey},
'Content-Type': 'application/json',
},
timeout: 5000, // 5 second timeout for health check
}
);
const latencyMs = Date.now() - startTime;
endpoint.responseTimeMs = latencyMs;
endpoint.lastCheckTime = Date.now();
if (response.status === 200) {
endpoint.consecutiveSuccesses++;
endpoint.consecutiveFailures = 0;
if (endpoint.consecutiveSuccesses >= this.SUCCESS_THRESHOLD) {
endpoint.status = EndpointStatus.HEALTHY;
}
this.emit('healthCheck', {
endpoint: endpoint.name,
healthy: true,
latencyMs,
timestamp: Date.now(),
} as HealthCheckResult);
return { endpoint: endpoint.name, healthy: true, latencyMs, timestamp: Date.now() };
}
endpoint.consecutiveFailures++;
endpoint.status = EndpointStatus.DEGRADED;
return { endpoint: endpoint.name, healthy: false, latencyMs, timestamp: Date.now() };
} catch (error) {
const latencyMs = Date.now() - startTime;
endpoint.consecutiveFailures++;
endpoint.consecutiveSuccesses = 0;
endpoint.status = EndpointStatus.UNHEALTHY;
this.emit('healthCheck', {
endpoint: endpoint.name,
healthy: false,
latencyMs,
timestamp: Date.now(),
} as HealthCheckResult);
return { endpoint: endpoint.name, healthy: false, latencyMs, timestamp: Date.now() };
}
}
async performHealthCheck(): Promise {
const results = await Promise.all(
this.endpoints.map((ep) => this.checkEndpointHealth(ep))
);
// Emit combined result
this.emit('healthCheckComplete', results);
// Auto-switch if current endpoint is unhealthy
if (this.currentEndpoint.status === EndpointStatus.UNHEALTHY) {
await this.switchToNextEndpoint();
}
}
async switchToNextEndpoint(): Promise {
const originalIndex = this.currentEndpointIndex;
for (let i = 1; i < this.endpoints.length; i++) {
const nextIndex = (this.currentEndpointIndex + i) % this.endpoints.length;
const nextEndpoint = this.endpoints[nextIndex];
if (nextEndpoint.status === EndpointStatus.HEALTHY ||
nextEndpoint.status === EndpointStatus.DEGRADED) {
this.currentEndpointIndex = nextIndex;
console.log(🔄 Switched from ${this.endpoints[originalIndex].name} to ${nextEndpoint.name});
this.emit('endpointSwitch', {
from: this.endpoints[originalIndex].name,
to: nextEndpoint.name,
});
return;
}
}
console.error('❌ No available endpoints - all endpoints are unhealthy');
this.emit('allEndpointsFailed');
throw new Error('All API endpoints are unavailable');
}
isCircuitBreakerOpen(): boolean {
if (!this.circuitBreaker.isOpen) {
return false;
}
const timeSinceLastFailure = Date.now() - this.circuitBreaker.lastFailureTime;
if (timeSinceLastFailure >= this.RECOVERY_TIMEOUT_MS) {
console.log('🔧 Circuit breaker: attempting recovery');
this.circuitBreaker.isOpen = false;
this.circuitBreaker.failureCount = 0;
return false;
}
return true;
}
openCircuitBreaker(): void {
this.circuitBreaker.isOpen = true;
this.circuitBreaker.lastFailureTime = Date.now();
console.warn('⚡ Circuit breaker opened - blocking requests');
this.emit('circuitBreakerOpened');
}
async chatCompletions(
messages: Array<{ role: string; content: string }>,
model: string = 'gpt-4.1',
options: {
temperature?: number;
max_tokens?: number;
top_p?: number;
} = {}
): Promise {
// Check circuit breaker
if (this.isCircuitBreakerOpen()) {
await this.switchToNextEndpoint();
}
const endpoint = this.currentEndpoint;
const maxRetries = this.endpoints.length;
for (let attempt = 0; attempt < maxRetries; attempt++) {
try {
const startTime = Date.now();
const response = await this.client.post(
${endpoint.baseUrl}/chat/completions,
{
model,
messages,
...options,
},
{
headers: {
'Authorization': Bearer ${this.apiKey},
'Content-Type': 'application/json',
},
}
);
const latencyMs = Date.now() - startTime;
endpoint.responseTimeMs = latencyMs;
// Success handling
endpoint.consecutiveFailures = 0;
endpoint.consecutiveSuccesses++;
if (this.circuitBreaker.isOpen && endpoint.status === EndpointStatus.HEALTHY) {
this.circuitBreaker.isOpen = false;
console.log('✅ Circuit breaker closed');
}
this.emit('requestSuccess', {
endpoint: endpoint.name,
latencyMs,
model,
});
return response.data;
} catch (error) {
const axiosError = error as AxiosError;
if (axiosError.response) {
const status = axiosError.response.status;
if (status >= 500) {
// Server error - retry with next endpoint
endpoint.consecutiveFailures++;
this.circuitBreaker.failureCount++;
console.warn(⚠ Server error ${status} from ${endpoint.name});
if (endpoint.consecutiveFailures >= this.FAILURE_THRESHOLD) {
await this.switchToNextEndpoint();
endpoint = this.currentEndpoint;
}
} else if (status >= 400) {
// Client error - don't retry
throw error;
}
} else if (axiosError.code === 'ECONNABORTED' || axiosError.code === 'ETIMEDOUT') {
// Timeout error
endpoint.consecutiveFailures++;
this.circuitBreaker.failureCount++;
console.error(⏱ Timeout from ${endpoint.name});
if (endpoint.consecutiveFailures >= this.FAILURE_THRESHOLD) {
await this.switchToNextEndpoint();
endpoint = this.currentEndpoint;
}
} else {
// Network error
endpoint.consecutiveFailures++;
this.circuitBreaker.failureCount++;
throw error;
}
}
}
// All endpoints exhausted
this.openCircuitBreaker();
throw new Error('All endpoints failed - circuit breaker opened');
}
startHealthCheckMonitor(intervalMs: number = this.HEALTH_CHECK_INTERVAL_MS): void {
if (this.healthCheckInterval) {
console.warn('Health check monitor already running');
return;
}
console.log('🚀 Starting health check monitor');
// Initial check
this.performHealthCheck();
// Periodic checks
this.healthCheckInterval = setInterval(() => {
this.performHealthCheck();
}, intervalMs);
}
stopHealthCheckMonitor(): void {
if (this.healthCheckInterval) {
clearInterval(this.healthCheckInterval);
this.healthCheckInterval = null;
console.log('🛑 Health check monitor stopped');
}
}
getStatus(): {
currentEndpoint: string;
allEndpoints: Endpoint[];
circuitBreaker: CircuitBreakerState;
} {
return {
currentEndpoint: this.currentEndpoint.name,
allEndpoints: [...this.endpoints],
circuitBreaker: { ...this.circuitBreaker },
};
}
destroy(): void {
this.stopHealthCheckMonitor();
this.removeAllListeners();
console.log('🧹 Client destroyed');
}
}
// Usage example
async function main() {
const client = new HolySheepFailoverClient('YOUR_HOLYSHEEP_API_KEY');
// Event listeners
client.on('healthCheck', (result: HealthCheckResult) => {
console.log(Health check: ${result.endpoint} - ${result.healthy ? '✓' : '✗'} (${result.latencyMs}ms));
});
client.on('endpointSwitch', ({ from, to }) => {
console.log(Endpoint switched: ${from} → ${to});
});
client.on('circuitBreakerOpened', () => {
console.error('ALERT: Circuit breaker opened!');
});
// Start monitoring
client.startHealthCheckMonitor();
try {
// Chat completion example
const response = await client.chatCompletions(
[
{ role: 'system', content: 'あなたは役立つアシスタントです。' },
{ role: 'user', content: 'フェイルオーバーについて説明してください。' },
],
'gpt-4.1',
{
temperature: 0.7,
max_tokens: 500,
}
);
console.log('Response:', response.choices[0].message.content);
console.log('Usage:', response.usage);
// Check status
console.log('Status:', client.getStatus());
} catch (error) {
console.error('Error:', error);
} finally {
client.destroy();
}
}
main().catch(console.error);
// Export for module usage
export { HolySheepFailoverClient, EndpointStatus };
export type { Endpoint, CircuitBreakerState, HealthCheckResult }; 設定ファイル例（Docker/Kubernetes対応）
# HolySheep API Failover Configuration
設定ファイル: holy-sheep-failover.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: holysheep-config
namespace: production
data:
HOLYSHEEP_API_KEY: "${HOLYSHEEP_API_KEY}"
HOLYSHEEP_BASE_URL: "https://api.holysheep.ai/v1"
# Health Check Settings
HEALTH_CHECK_INTERVAL: "10"
HEALTH_CHECK_TIMEOUT: "5"
FAILURE_THRESHOLD: "3"
SUCCESS_THRESHOLD: "2"
# Circuit Breaker Settings
CIRCUIT_BREAKER_TIMEOUT: "30"
CIRCUIT_BREAKER_MAX_FAILURES: "5"
# Retry Settings
MAX_RETRIES: "3"
RETRY_DELAY: "1000"
# Model Configuration
DEFAULT_MODEL: "gpt-4.1"
FALLBACK_MODEL: "gemini-2.5-flash"
COST_OPTIMIZED_MODEL: "deepseek-v3.2"
---