3f9e4535d1
Assistant: codex Assistant-Model: gpt-5.6-sol Assistant-Session: 01a02669-87ee-7a31-b111-edc95a16e0fa
438 lines
18 KiB
Python
Executable file
438 lines
18 KiB
Python
Executable file
#!/usr/bin/env python3
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"""Attended audit-core database lease failure/recovery exercise.
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The script is fail-closed and value-safe. It selects only a single live lease
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under the exact audit-core runtime prefix, never emits its id, never reads a
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database password, never restarts audit-core, and requires a separately
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approved synthetic-load driver.
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"""
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from __future__ import annotations
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import argparse
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import hashlib
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import importlib.util
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import json
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import os
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import stat
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import subprocess
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import sys
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import time
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from datetime import UTC, datetime, timedelta
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from pathlib import Path
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from typing import Any, Callable
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ROOT = Path(__file__).resolve().parents[1]
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TASK_ID = "RAILIANCE-WP-0024-T02"
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PROCEDURE = "audit-core-database-lease-recovery"
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LEASE_PREFIX = "database/creds/audit-core-runtime"
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EXTERNAL_SECRET = "audit-core-database"
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CONFIRM = f"{TASK_ID}:attended"
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MAX_WINDOW_SECONDS = 15 * 60
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MIN_LEASE_TTL_SECONDS = 5 * 60
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EXPECTED_DRIVER_KEYS = {
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"baseline": {"contract_id", "fixture_id", "status", "secret_values_observed"},
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"expect-unavailable": {
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"contract_id", "fixture_id", "status", "http_status", "attempts",
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"secret_values_observed",
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},
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"expect-recovered": {
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"contract_id", "fixture_id", "status", "http_status", "attempts",
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"secret_values_observed",
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},
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"cleanup": {"contract_id", "fixture_id", "status", "secret_values_observed"},
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}
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class ProcedureError(RuntimeError):
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pass
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def load_preflight_module() -> Any:
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spec = importlib.util.spec_from_file_location(
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"audit_core_recovery_preflight",
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ROOT / "scripts" / "audit-core-recovery-preflight.py",
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)
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if not spec or not spec.loader:
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raise ProcedureError("cannot load recovery preflight module")
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module = importlib.util.module_from_spec(spec)
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spec.loader.exec_module(module)
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return module
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PREFLIGHT = load_preflight_module()
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def parse_time(value: str) -> datetime:
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parsed = datetime.fromisoformat(value.replace("Z", "+00:00"))
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if parsed.tzinfo is None:
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raise ProcedureError("approval timestamps must include a timezone")
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return parsed.astimezone(UTC)
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def load_approval(path: Path, now: datetime, *, require_open_window: bool) -> dict[str, Any]:
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try:
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document = json.loads(path.read_text(encoding="utf-8"))
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except (OSError, json.JSONDecodeError) as exc:
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raise ProcedureError("approval receipt is unavailable or invalid JSON") from exc
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if not isinstance(document, dict):
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raise ProcedureError("approval receipt must be an object")
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if document.get("procedure") != PROCEDURE or document.get("task_id") != TASK_ID:
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raise ProcedureError("approval receipt has the wrong procedure or task")
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if document.get("status") != "approved" or not document.get("approval_id"):
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raise ProcedureError("approval receipt is not approved")
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window = document.get("window") or {}
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if not window.get("start") or not window.get("end"):
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raise ProcedureError("approval receipt has no complete window")
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start, end = parse_time(window["start"]), parse_time(window["end"])
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if not start < end or (end - start).total_seconds() > MAX_WINDOW_SECONDS:
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raise ProcedureError("approval window must be positive and at most 15 minutes")
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if require_open_window and not start <= now <= end:
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raise ProcedureError("current time is outside the approved window")
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if not document.get("abort_operator"):
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raise ProcedureError("approval receipt has no abort operator")
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owners = document.get("owners") or {}
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for owner in ("audit-core", "rapp-postgres", "railiance-platform"):
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record = owners.get(owner) or {}
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if record.get("acknowledged") is not True or not record.get("message_id"):
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raise ProcedureError(f"approval receipt lacks {owner} acknowledgement")
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load = document.get("synthetic_load") or {}
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if not load.get("contract_id") or not load.get("driver_revision"):
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raise ProcedureError("approval receipt lacks the synthetic-load contract")
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return document
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def safe_run(
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command: list[str], *, label: str, env: dict[str, str] | None = None
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) -> subprocess.CompletedProcess[str]:
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completed = subprocess.run(
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command, text=True, capture_output=True, env=env, check=False
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)
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if completed.returncode != 0:
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# Never attach stdout/stderr: Bao and load-driver processes may hold
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# sensitive material even though their contract forbids emitting it.
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raise ProcedureError(f"{label} failed (exit {completed.returncode})")
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return completed
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class Authority:
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def __init__(self, token_file: Path) -> None:
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if not token_file.is_file() or stat.S_IMODE(token_file.stat().st_mode) != 0o600:
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raise ProcedureError("OpenBao token file must exist with mode 0600")
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token = token_file.read_text(encoding="utf-8").splitlines()[0].strip()
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if not token:
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raise ProcedureError("OpenBao token file is empty")
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self.env = dict(os.environ, BAO_ADDR="https://bao.coulomb.social", BAO_TOKEN=token)
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def bao(self, args: list[str], *, label: str) -> str:
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return safe_run(["bao", *args], label=label, env=self.env).stdout.strip()
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def single_runtime_lease(self) -> dict[str, Any]:
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raw = self.bao(
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["list", "-format=json", f"sys/leases/lookup/{LEASE_PREFIX}"],
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label="list exact runtime lease handles",
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)
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try:
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handles = json.loads(raw)
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except json.JSONDecodeError as exc:
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raise ProcedureError("runtime lease list is invalid JSON") from exc
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if not isinstance(handles, list) or len(handles) != 1:
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count = len(handles) if isinstance(handles, list) else "unknown"
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raise ProcedureError(
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f"exact runtime prefix must contain one live handle (observed {count})"
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)
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lease_id = f"{LEASE_PREFIX}/{handles[0]}"
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lookup_raw = self.bao(
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["write", "-format=json", "sys/leases/lookup", f"lease_id={lease_id}"],
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label="lookup exact runtime lease metadata",
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)
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try:
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lookup = json.loads(lookup_raw)["data"]
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issue = parse_time(lookup["issue_time"])
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expires = parse_time(lookup["expire_time"])
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ttl = int(lookup["ttl"])
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except (json.JSONDecodeError, KeyError, TypeError, ValueError) as exc:
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raise ProcedureError("runtime lease metadata is incomplete") from exc
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return {
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"id": lease_id,
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"fingerprint": hashlib.sha256(lease_id.encode()).hexdigest()[:12],
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"issue_time": issue,
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"expire_time": expires,
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"ttl": ttl,
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}
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def revoke(self, lease_id: str) -> None:
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self.bao(["lease", "revoke", lease_id], label="revoke exact runtime lease")
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class LoadDriver:
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def __init__(self, path: Path, contract_id: str, expected_revision: str) -> None:
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if not path.is_file() or not os.access(path, os.X_OK):
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raise ProcedureError("synthetic-load driver must be an executable file")
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revision = "sha256:" + hashlib.sha256(path.read_bytes()).hexdigest()
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if expected_revision != revision:
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raise ProcedureError("synthetic-load driver does not match the approved revision")
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self.path = path
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self.contract_id = contract_id
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self.revision = revision
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def run(self, phase: str) -> dict[str, Any]:
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result = safe_run(
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[str(self.path), phase, "--contract-id", self.contract_id],
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label=f"synthetic-load {phase}",
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)
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try:
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payload = json.loads(result.stdout)
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except json.JSONDecodeError as exc:
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raise ProcedureError(f"synthetic-load {phase} returned invalid JSON") from exc
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if not isinstance(payload, dict) or set(payload) != EXPECTED_DRIVER_KEYS[phase]:
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raise ProcedureError(f"synthetic-load {phase} returned an unsafe evidence shape")
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if payload.get("contract_id") != self.contract_id:
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raise ProcedureError(f"synthetic-load {phase} returned the wrong contract")
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if payload.get("secret_values_observed") is not False:
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raise ProcedureError(f"synthetic-load {phase} did not attest value safety")
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return payload
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def secret_state(remote: Any) -> dict[str, Any]:
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secret_rv = remote.kubectl(
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["-n", "audit-core", "get", "secret", EXTERNAL_SECRET, "-o", "jsonpath={.metadata.resourceVersion}"],
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label="read database Secret resource version",
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)
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external = remote.kubectl_json(
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["-n", "audit-core", "get", "externalsecret", EXTERNAL_SECRET],
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label="read database ExternalSecret state",
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)
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mount_generation = remote.kubectl(
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["-n", "audit-core", "exec", "deploy/audit-core", "--", "readlink", "/etc/audit-core/db/..data"],
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label="read mounted credential generation",
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)
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refresh = external.get("status", {}).get("refreshTime")
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ready = PREFLIGHT.resource_condition(external)["ready"]
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if not refresh:
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raise ProcedureError("database ExternalSecret has no refresh time")
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return {
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"resource_version": secret_rv,
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"mount_generation": mount_generation,
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"refresh_time": parse_time(refresh),
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"ready": ready,
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}
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def pod_state(remote: Any) -> dict[str, Any]:
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pods = remote.kubectl_json(
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["-n", "audit-core", "get", "pods", "-l", "app.kubernetes.io/name=audit-core"],
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label="read audit-core pod metadata",
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).get("items", [])
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if len(pods) != 1:
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raise ProcedureError(f"expected one audit-core pod, observed {len(pods)}")
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statuses = pods[0].get("status", {}).get("containerStatuses", [])
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return {
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"uid": pods[0]["metadata"]["uid"],
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"restart_count": sum(int(item.get("restartCount", 0)) for item in statuses),
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}
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def assert_lease_matches_refresh(lease: dict[str, Any], secret: dict[str, Any]) -> None:
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delta = abs((lease["issue_time"] - secret["refresh_time"]).total_seconds())
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if (
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delta > 5
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or secret["refresh_time"] < lease["issue_time"] - timedelta(seconds=5)
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or secret["refresh_time"] > lease["expire_time"]
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):
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raise ProcedureError("single runtime lease is not coherent with the mounted Secret refresh")
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if lease["ttl"] < MIN_LEASE_TTL_SECONDS:
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raise ProcedureError("runtime lease is too close to automatic refresh; wait for the next sync")
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def wait_for(
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predicate: Callable[[], bool], *, label: str, timeout: int = 120, interval: float = 2
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) -> None:
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deadline = time.monotonic() + timeout
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while time.monotonic() < deadline:
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if predicate():
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return
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time.sleep(interval)
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raise ProcedureError(f"timed out waiting for {label}")
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def force_refresh(remote: Any, baseline: dict[str, Any]) -> dict[str, Any]:
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remote.kubectl(
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[
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"-n", "audit-core", "annotate", "externalsecret", EXTERNAL_SECRET,
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f"railiance.io/force-sync={int(time.time())}", "--overwrite",
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],
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label="force database ExternalSecret reconciliation",
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)
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latest: dict[str, Any] = {}
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def changed() -> bool:
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nonlocal latest
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latest = secret_state(remote)
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return bool(
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latest["ready"]
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and latest["resource_version"] != baseline["resource_version"]
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and latest["mount_generation"] != baseline["mount_generation"]
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and latest["refresh_time"] > baseline["refresh_time"]
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)
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wait_for(changed, label="database Secret and mounted generation refresh")
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return latest
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def exercise(args: argparse.Namespace) -> dict[str, Any]:
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approval = load_approval(args.approval, datetime.now(UTC), require_open_window=True)
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if args.confirm != CONFIRM:
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raise ProcedureError(f"live exercise requires --confirm {CONFIRM}")
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remote = PREFLIGHT.Remote(args.remote)
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authority = Authority(args.token_file)
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driver = LoadDriver(
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args.load_driver,
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approval["synthetic_load"]["contract_id"],
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approval["synthetic_load"]["driver_revision"],
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)
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preflight_args = argparse.Namespace(
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approved_window_id=approval["approval_id"],
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audit_core_owner_ack=True,
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rapp_postgres_owner_ack=True,
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synthetic_load_id=approval["synthetic_load"]["contract_id"],
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abort_operator=approval["abort_operator"],
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)
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preflight = PREFLIGHT.database_lease_preflight(remote, preflight_args)
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if not preflight["ready_for_live_execution"]:
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raise ProcedureError("database lease recovery preflight is not ready")
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before_pod = pod_state(remote)
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before_secret = secret_state(remote)
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lease = authority.single_runtime_lease()
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assert_lease_matches_refresh(lease, before_secret)
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baseline_load = driver.run("baseline")
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if baseline_load.get("status") != "ready":
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raise ProcedureError("synthetic-load baseline is not ready")
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revoked = False
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recovered_secret: dict[str, Any] | None = None
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unavailable: dict[str, Any] | None = None
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recovered: dict[str, Any] | None = None
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cleanup_result: dict[str, Any] | None = None
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completed = False
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try:
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# Close the race with ESO's ordinary refresh before the destructive step.
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if secret_state(remote) != before_secret or pod_state(remote) != before_pod:
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raise ProcedureError("baseline changed before revocation")
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current = authority.single_runtime_lease()
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if current["fingerprint"] != lease["fingerprint"]:
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raise ProcedureError("runtime lease changed before revocation")
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authority.revoke(lease["id"])
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revoked = True
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wait_for(
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lambda: PREFLIGHT.endpoint_status(remote, "/healthz") == 200
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and PREFLIGHT.endpoint_status(remote, "/readyz") == 503,
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label="health 200 and readiness 503 after revocation",
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timeout=60,
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)
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unavailable = driver.run("expect-unavailable")
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if (
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unavailable.get("http_status") != 503
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or unavailable.get("status") != "retryable_unavailable"
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or not isinstance(unavailable.get("attempts"), int)
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or unavailable["attempts"] < 1
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or unavailable.get("fixture_id") != baseline_load.get("fixture_id")
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):
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raise ProcedureError("synthetic load did not prove retryable 503")
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recovered_secret = force_refresh(remote, before_secret)
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wait_for(
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lambda: PREFLIGHT.endpoint_status(remote, "/readyz") == 200,
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label="audit-core readiness recovery",
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)
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recovered = driver.run("expect-recovered")
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if (
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recovered.get("status") not in {"accepted", "duplicate"}
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or recovered.get("http_status") not in {200, 202}
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or recovered.get("fixture_id") != baseline_load.get("fixture_id")
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):
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raise ProcedureError("synthetic load did not prove accepted/duplicate recovery")
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after_pod = pod_state(remote)
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if after_pod != before_pod:
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raise ProcedureError("audit-core pod identity or restart count changed")
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completed = True
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finally:
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if revoked and recovered_secret is None:
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try:
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force_refresh(remote, before_secret)
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except Exception:
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pass
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try:
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cleanup_result = driver.run("cleanup")
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if (
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cleanup_result.get("status") != "clean"
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or cleanup_result.get("fixture_id") != baseline_load.get("fixture_id")
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):
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raise ProcedureError("synthetic-load cleanup did not confirm exact fixture removal")
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except Exception:
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if completed:
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raise
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return {
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"procedure": PROCEDURE,
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"task_id": TASK_ID,
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"approval_id": approval["approval_id"],
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"synthetic_load_contract": approval["synthetic_load"]["contract_id"],
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"synthetic_load_driver_revision": driver.revision,
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"lease_handle_fingerprint": lease["fingerprint"],
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"lease_revoked": revoked,
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"health_during_failure": 200,
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"readiness_during_failure": 503,
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"synthetic_unavailable_attempts": unavailable["attempts"] if unavailable else None,
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"secret_resource_version_changed": bool(
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recovered_secret
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and recovered_secret["resource_version"] != before_secret["resource_version"]
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),
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"mount_generation_changed": bool(
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recovered_secret
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and recovered_secret["mount_generation"] != before_secret["mount_generation"]
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),
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"readiness_recovered": PREFLIGHT.endpoint_status(remote, "/readyz") == 200,
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"synthetic_recovery_status": recovered["status"] if recovered else None,
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"same_pod_uid": pod_state(remote)["uid"] == before_pod["uid"],
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"restart_count_unchanged": pod_state(remote)["restart_count"] == before_pod["restart_count"],
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"load_cleanup_status": cleanup_result["status"] if cleanup_result else None,
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"completed_at": datetime.now(UTC).replace(microsecond=0).isoformat().replace("+00:00", "Z"),
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"secret_values_observed": False,
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}
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def main() -> int:
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parser = argparse.ArgumentParser()
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parser.add_argument("command", choices=["validate-approval", "exercise"])
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parser.add_argument("--approval", type=Path, required=True)
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parser.add_argument("--remote", default="railiance01")
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parser.add_argument(
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"--token-file", type=Path,
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default=Path.home() / ".local/openbao/platform-admin.token",
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)
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parser.add_argument("--load-driver", type=Path)
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parser.add_argument("--confirm")
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args = parser.parse_args()
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try:
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if args.command == "validate-approval":
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approval = load_approval(args.approval, datetime.now(UTC), require_open_window=False)
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result = {
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"procedure": PROCEDURE,
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"approval_id": approval["approval_id"],
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"approval_receipt_valid": True,
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"secret_values_observed": False,
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}
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else:
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if args.load_driver is None:
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raise ProcedureError("live exercise requires --load-driver")
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result = exercise(args)
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except (OSError, IndexError, ProcedureError, PREFLIGHT.PreflightError) as exc:
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print(f"database lease recovery failed: {exc}", file=sys.stderr)
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return 1
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print(json.dumps(result, indent=2, sort_keys=True))
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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