Files
DECNET/decnet/env.py
anti 82ec7f3117 fix: gate embedded profiler behind DECNET_EMBED_PROFILER to prevent dual-instance cursor conflict
decnet deploy spawns a standalone profiler daemon AND api.py was also starting
attacker_profile_worker as an asyncio task inside the web server. Both instances
shared the same attacker_worker_cursor key in the state table, causing a race
where one instance could skip events already claimed by the other or overwrite
the cursor mid-batch.

Default is now OFF (embedded profiler disabled). The standalone daemon started
by decnet deploy is the single authoritative instance. Set DECNET_EMBED_PROFILER=true
only when running decnet api in isolation without a full deploy.
2026-04-15 17:49:18 -04:00

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import os
from pathlib import Path
from typing import Optional
from dotenv import load_dotenv
# Calculate absolute path to the project root
_ROOT: Path = Path(__file__).parent.parent.absolute()
# Load .env.local first, then fallback to .env
load_dotenv(_ROOT / ".env.local")
load_dotenv(_ROOT / ".env")
def _port(name: str, default: int) -> int:
raw = os.environ.get(name, str(default))
try:
value = int(raw)
except ValueError:
raise ValueError(f"Environment variable '{name}' must be an integer, got '{raw}'.")
if not (1 <= value <= 65535):
raise ValueError(f"Environment variable '{name}' must be 165535, got {value}.")
return value
def _require_env(name: str) -> str:
"""Return the env var value or raise at startup if it is unset or a known-bad default."""
_KNOWN_BAD = {"fallback-secret-key-change-me", "admin", "secret", "password", "changeme"}
value = os.environ.get(name)
if not value:
raise ValueError(
f"Required environment variable '{name}' is not set. "
f"Set it in .env.local or export it before starting DECNET."
)
if any(k.startswith("PYTEST") for k in os.environ):
return value
if value.lower() in _KNOWN_BAD:
raise ValueError(
f"Environment variable '{name}' is set to an insecure default ('{value}'). "
f"Choose a strong, unique value before starting DECNET."
)
if name == "DECNET_JWT_SECRET" and len(value) < 32:
_developer = os.environ.get("DECNET_DEVELOPER", "False").lower() == "true"
if not _developer:
raise ValueError(
f"DECNET_JWT_SECRET is too short ({len(value)} bytes). "
f"Use at least 32 characters to satisfy HS256 requirements (RFC 7518 §3.2)."
)
return value
# System logging — all microservice daemons append here.
DECNET_SYSTEM_LOGS: str = os.environ.get("DECNET_SYSTEM_LOGS", "decnet.system.log")
# Set to "true" to embed the profiler inside the API process.
# Leave unset (default) when the standalone `decnet profiler --daemon` is
# running — embedding both produces two workers sharing the same DB cursor,
# which causes events to be skipped or processed twice.
DECNET_EMBED_PROFILER: bool = os.environ.get("DECNET_EMBED_PROFILER", "").lower() == "true"
# API Options
DECNET_API_HOST: str = os.environ.get("DECNET_API_HOST", "0.0.0.0") # nosec B104
DECNET_API_PORT: int = _port("DECNET_API_PORT", 8000)
DECNET_JWT_SECRET: str = _require_env("DECNET_JWT_SECRET")
DECNET_INGEST_LOG_FILE: str | None = os.environ.get("DECNET_INGEST_LOG_FILE", "/var/log/decnet/decnet.log")
# Web Dashboard Options
DECNET_WEB_HOST: str = os.environ.get("DECNET_WEB_HOST", "0.0.0.0") # nosec B104
DECNET_WEB_PORT: int = _port("DECNET_WEB_PORT", 8080)
DECNET_ADMIN_USER: str = os.environ.get("DECNET_ADMIN_USER", "admin")
DECNET_ADMIN_PASSWORD: str = os.environ.get("DECNET_ADMIN_PASSWORD", "admin")
DECNET_DEVELOPER: bool = os.environ.get("DECNET_DEVELOPER", "False").lower() == "true"
# Database Options
DECNET_DB_TYPE: str = os.environ.get("DECNET_DB_TYPE", "sqlite").lower()
DECNET_DB_URL: Optional[str] = os.environ.get("DECNET_DB_URL")
# MySQL component vars (used only when DECNET_DB_URL is not set)
DECNET_DB_HOST: str = os.environ.get("DECNET_DB_HOST", "localhost")
DECNET_DB_PORT: int = _port("DECNET_DB_PORT", 3306) if os.environ.get("DECNET_DB_PORT") else 3306
DECNET_DB_NAME: str = os.environ.get("DECNET_DB_NAME", "decnet")
DECNET_DB_USER: str = os.environ.get("DECNET_DB_USER", "decnet")
DECNET_DB_PASSWORD: Optional[str] = os.environ.get("DECNET_DB_PASSWORD")
# CORS — comma-separated list of allowed origins for the web dashboard API.
# Defaults to the configured web host/port. Override with DECNET_CORS_ORIGINS if needed.
# Example: DECNET_CORS_ORIGINS=http://192.168.1.50:9090,https://dashboard.example.com
_web_hostname: str = "localhost" if DECNET_WEB_HOST in ("0.0.0.0", "127.0.0.1", "::") else DECNET_WEB_HOST # nosec B104
_cors_default: str = f"http://{_web_hostname}:{DECNET_WEB_PORT}"
_cors_raw: str = os.environ.get("DECNET_CORS_ORIGINS", _cors_default)
DECNET_CORS_ORIGINS: list[str] = [o.strip() for o in _cors_raw.split(",") if o.strip()]