# Redis Exporter Dockerfile
FROM python:3.11-slim

WORKDIR /app

# 安装依赖
COPY requirements.txt .
RUN pip install --no-cache-dir redis prometheus-client

# 复制 exporter 代码
COPY src/functional_scaffold/core/metrics_redis_exporter.py .

# 暴露端口
EXPOSE 8001

# 启动 HTTP 服务器提供指标
CMD ["python", "-c", "\
from http.server import HTTPServer, BaseHTTPRequestHandler; \
from metrics_redis_exporter import get_metrics; \
class MetricsHandler(BaseHTTPRequestHandler): \
    def do_GET(self): \
        if self.path == '/metrics': \
            self.send_response(200); \
            self.send_header('Content-Type', 'text/plain; version=0.0.4'); \
            self.end_headers(); \
            self.wfile.write(get_metrics()); \
        else: \
            self.send_response(404); \
            self.end_headers(); \
    def log_message(self, format, *args): pass; \
server = HTTPServer(('0.0.0.0', 8001), MetricsHandler); \
print('Redis Exporter 启动在端口 8001'); \
server.serve_forever()"]