mirror of
https://github.com/rcourtman/Pulse.git
synced 2026-10-23 20:25:56 +00:00
pulse-triage[bot]
360721cc91
Current operational source exposes healthz and takes the shared deployment lock. Pin that route and make the disposable service return 404 for unknown paths so native acceptance cannot manufacture a healthy cohost observation. Change-source: pulse-maintainer
513 lines
24 KiB
Python
513 lines
24 KiB
Python
#!/usr/bin/env python3
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"""Demo-only host transaction. Called by the reviewed CI dispatcher, not a worker tool."""
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from __future__ import annotations
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import fcntl
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import hashlib
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import json
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import os
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from pathlib import Path
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import re
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import shutil
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import signal
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import socket
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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 urllib.parse import urlsplit
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WINDOW = 300
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INTERVAL = 5
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READY_TIMEOUT = 60
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SERVICES = ("pulse", "pulse-relay", "caddy")
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ROOT = Path("/var/lib/pulse-deploy/demo")
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LOCK = Path("/var/lib/pulse-deploy/relay/deploy.lock")
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PATHS = {"binary": Path("/opt/pulse/bin/pulse"),
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"unit": Path("/etc/systemd/system/pulse.service"),
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"dropins": Path("/etc/systemd/system/pulse.service.d"),
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"data": Path("/etc/pulse")}
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RELAY_HEALTH = "https://relay.pulserelay.pro/healthz"
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COUNT_KEYS = ("nodes", "vms_per_node", "lxcs_per_node", "docker_hosts",
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"docker_containers", "generic_hosts", "k8s_clusters", "k8s_nodes",
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"k8s_pods", "k8s_deployments")
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DURATION_KEYS = ("seed_duration", "sample_interval", "update_interval")
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# Only generated demo operational memory is reset on the already-unhealthy
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# recovery route. Its complete original estate remains in the private snapshot.
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DEMO_HISTORY = ("ai_incidents.json", "ai_incidents.json.tmp",
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"alerts/alert-history.json", "alerts/alert-history.backup.json",
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"alerts/alert-history.json.imported", "alerts/alert-history.backup.json.imported",
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"alerts/events.db", "alerts/events.db-shm", "alerts/events.db-wal")
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CRASH = re.compile(r"\bpanic\b|\bfatal error\b|segmentation fault|core dumped|watchdog timeout", re.I)
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TERMINAL = {"committed", "healthy_noop", "rolled_back", "refused"}
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class Failure(Exception):
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"""Only fixed stage names, never command output or private response bodies."""
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def atomic_json(path, value):
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tmp = path.with_suffix(".tmp")
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with open(tmp, "w", encoding="utf-8") as stream:
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os.chmod(tmp, 0o600)
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json.dump(value, stream, sort_keys=True)
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stream.flush()
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os.fsync(stream.fileno())
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os.replace(tmp, path)
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fd = os.open(path.parent, os.O_DIRECTORY)
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try:
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os.fsync(fd)
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finally:
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os.close(fd)
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def validate(request):
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if set(request) != {"mode", "hostname", "local_url", "public_url", "version", "profile", "control_sha", "run_id", "run_attempt", "installer_sha256"}:
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raise Failure("request-shape")
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if request["mode"] not in {"update", "recover"}:
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raise Failure("request-mode")
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for field, pattern in (("version", r"v[0-9]+\.[0-9]+\.[0-9]+"),
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("hostname", r"[a-zA-Z0-9][a-zA-Z0-9.-]{0,252}"),
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("control_sha", r"[0-9a-f]{40}"),
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("run_id", r"[1-9][0-9]*"), ("run_attempt", r"[1-9][0-9]*")):
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if not isinstance(request[field], str) or not re.fullmatch(pattern, request[field]):
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raise Failure("request-identity")
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for field, public in (("local_url", False), ("public_url", True)):
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try:
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url = urlsplit(request[field])
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valid = (url.scheme == ("https" if public else "http")
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and url.hostname and not url.username and not url.password
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and not url.query and not url.fragment
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and (url.path == "/api/health" if public else url.path in {"", "/"})
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and (public or url.hostname in {"localhost", "127.0.0.1", "::1"})
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and 0 < (url.port or (443 if public else 80)) < 65536)
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except (TypeError, ValueError):
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valid = False
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if not valid:
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raise Failure("request-url")
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profile = request["profile"]
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if not isinstance(profile, dict) or set(profile) != set(COUNT_KEYS + DURATION_KEYS):
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raise Failure("request-profile")
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for name, value in profile.items():
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pattern = r"[1-9][0-9]{0,3}" if name in COUNT_KEYS else r"[1-9][0-9]{0,3}[smhd]"
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if not isinstance(value, str) or not re.fullmatch(pattern, value):
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raise Failure("request-profile")
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digest = request["installer_sha256"]
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if (request["mode"] == "update" and not re.fullmatch(r"[0-9a-f]{64}", digest)) or (request["mode"] == "recover" and digest != ""):
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raise Failure("request-installer")
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def copy_path(src, dst):
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"""Copy without following symlinks, retaining ownership as well as modes."""
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info = src.lstat()
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if stat.S_ISLNK(info.st_mode):
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dst.symlink_to(os.readlink(src))
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elif stat.S_ISDIR(info.st_mode):
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dst.mkdir(mode=0o700)
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for child in src.iterdir():
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copy_path(child, dst / child.name)
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shutil.copystat(src, dst, follow_symlinks=False)
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elif stat.S_ISREG(info.st_mode):
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shutil.copy2(src, dst, follow_symlinks=False)
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else:
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raise Failure("snapshot-special-file")
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os.chown(dst, info.st_uid, info.st_gid, follow_symlinks=False)
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if not stat.S_ISLNK(info.st_mode):
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fd = os.open(dst, os.O_RDONLY | (os.O_DIRECTORY if stat.S_ISDIR(info.st_mode) else 0))
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try:
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os.fsync(fd)
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finally:
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os.close(fd)
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def remove_path(path):
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if path.is_symlink() or path.is_file():
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path.unlink()
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elif path.is_dir():
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shutil.rmtree(path)
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def estate_hash(paths):
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rows = []
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for label, root in sorted(paths.items()):
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exists = root.exists() or root.is_symlink()
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if not exists:
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rows.append((label, "absent"))
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continue
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for path in [root] + (sorted(root.rglob("*")) if root.is_dir() and not root.is_symlink() else []):
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info = path.lstat()
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kind = stat.S_IFMT(info.st_mode)
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content = os.readlink(path) if stat.S_ISLNK(info.st_mode) else ""
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if stat.S_ISREG(info.st_mode):
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digest = hashlib.sha256()
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with open(path, "rb") as stream:
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for block in iter(lambda: stream.read(1024 * 1024), b""):
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digest.update(block)
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content = digest.hexdigest()
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rows.append((label, str(path.relative_to(root)), kind, stat.S_IMODE(info.st_mode), info.st_uid, info.st_gid, content))
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return hashlib.sha256(json.dumps(rows, sort_keys=True).encode()).hexdigest()
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class Host:
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now = staticmethod(time.monotonic)
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sleep = staticmethod(time.sleep)
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def command(self, argv, *, timeout=20, env=None):
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try:
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result = subprocess.run(argv, capture_output=True, timeout=timeout, env=env, check=False)
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except (OSError, subprocess.TimeoutExpired) as exc:
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raise Failure("command-unavailable") from exc
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if result.returncode or len(result.stdout) > 1024 * 1024:
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raise Failure("command-failed")
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return result.stdout.decode("utf-8", errors="strict")
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def identity(self, hostname):
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if socket.gethostname() != hostname or os.geteuid() != 0:
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raise Failure("host-identity")
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unit = self.command(["systemctl", "show", "pulse", "--property=FragmentPath,User,Group,ExecStart,DropInPaths", "--no-pager"])
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fields = dict(line.split("=", 1) for line in unit.splitlines() if "=" in line)
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if (fields.get("FragmentPath") != str(PATHS["unit"])
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or fields.get("User") != "pulse" or fields.get("Group") != "pulse"
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or str(PATHS["binary"]) not in fields.get("ExecStart", "")):
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raise Failure("service-identity")
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for name in ("binary", "unit", "data"):
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if PATHS[name].is_symlink() or not PATHS[name].exists():
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raise Failure("estate-identity")
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if PATHS["dropins"].is_symlink():
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raise Failure("dropin-identity")
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for path in fields.get("DropInPaths", "").split():
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if Path(path).parent != PATHS["dropins"] or Path(path).is_symlink():
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raise Failure("unsupported-dropin")
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if self.command(["systemctl", "is-enabled", "pulse"]).strip() != "enabled":
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raise Failure("service-disabled")
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def state(self):
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states = {}
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for service in SERVICES:
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text = self.command(["systemctl", "show", service, "--property=ActiveState,SubState,MainPID,NRestarts", "--no-pager"])
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fields = dict(line.split("=", 1) for line in text.splitlines() if "=" in line)
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if (set(fields) != {"ActiveState", "SubState", "MainPID", "NRestarts"}
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or not fields["MainPID"].isdigit() or not fields["NRestarts"].isdigit()):
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raise Failure("service-observation")
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states[service] = fields
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return states
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def status(self, url):
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# No redirects, response bodies, credential arguments or ambient curl config.
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try:
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result = self.command(["curl", "--disable", "--silent", "--connect-timeout", "3", "--max-time", "8", "--output", "/dev/null", "--write-out", "%{http_code}", "--", url], timeout=10)
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except Failure:
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return "000"
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return result if re.fullmatch(r"[1-5][0-9]{2}", result) else "000"
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def version(self, url):
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try:
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body = self.command(["curl", "--disable", "--silent", "--fail", "--connect-timeout", "3", "--max-time", "8", "--", url.rstrip("/") + "/api/version"], timeout=10)
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if len(body) > 8192:
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raise Failure("version-observation")
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value = json.loads(body)["version"]
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if not isinstance(value, str) or not re.fullmatch(r"v?[0-9]+\.[0-9]+\.[0-9]+", value):
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raise Failure("version-observation")
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return value.lstrip("v")
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except (ValueError, KeyError, TypeError) as exc:
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raise Failure("version-observation") from exc
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def cursors(self):
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cursors = {}
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for service in SERVICES:
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text = self.command(["journalctl", "-u", service, "-n", "1", "--output=json", "--show-cursor", "--no-pager"])
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matches = re.findall(r"^-- cursor: ([^\s]+)$", text, re.M)
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if len(matches) != 1:
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raise Failure("journal-cursor")
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cursors[service] = matches[0]
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return cursors
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def check_journal(self, cursors):
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for service, cursor in cursors.items():
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text = self.command(["journalctl", "-u", service, "--after-cursor", cursor, "--output=json", "--quiet", "--no-pager"])
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for line in text.splitlines():
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try:
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entry = json.loads(line)
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if not isinstance(entry.get("MESSAGE"), str) or not isinstance(entry.get("__CURSOR"), str):
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raise Failure("journal-observation")
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except (ValueError, TypeError, AttributeError) as exc:
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raise Failure("journal-observation") from exc
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if CRASH.search(entry["MESSAGE"]):
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raise Failure("new-service-crash")
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cursors[service] = entry["__CURSOR"]
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def stop(self):
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self.command(["systemctl", "stop", "pulse"], timeout=90)
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def start(self):
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self.command(["systemctl", "daemon-reload"])
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self.command(["systemctl", "start", "pulse"], timeout=90)
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def install(self, attempt, request):
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installer = attempt / "installer.sh"
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if hashlib.sha256(installer.read_bytes()).hexdigest() != request["installer_sha256"]:
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raise Failure("installer-identity")
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self.command(["bash", str(installer), "--version", request["version"]], timeout=900,
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env={"PATH": "/usr/sbin:/usr/bin:/sbin:/bin", "HOME": "/root", "PULSE_SERVICE_NAME": "pulse"})
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def profile_values(self, request):
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values = {"DEMO_MODE": "true", "PULSE_MOCK_MODE": "true", "PULSE_MOCK_RANDOM_METRICS": "true",
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"PULSE_MOCK_STOPPED_PERCENT": "6", "PULSE_MOCK_SEED_METRICS_STORE": "false"}
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for key, value in request["profile"].items():
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key = {"seed_duration": "trends_seed_duration", "sample_interval": "trends_sample_interval"}.get(key, key)
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values["PULSE_MOCK_" + key.upper()] = value
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return values
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def profile_matches(self, request):
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text = (PATHS["data"] / ".env").read_text().splitlines()
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values = self.profile_values(request)
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return (all(text.count(key + "=" + value) == 1 for key, value in values.items())
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and "demo_fixtures" in json.loads((PATHS["data"] / "billing.json").read_text()).get("capabilities", []))
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def profile(self, request, unhealthy):
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env_file = PATHS["data"] / ".env"
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billing_file = PATHS["data"] / "billing.json"
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if env_file.is_symlink() or billing_file.is_symlink():
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raise Failure("configuration-symlink")
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values = self.profile_values(request)
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text = env_file.read_text()
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for key, value in values.items():
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pattern = re.compile(r"^[ \t]*" + re.escape(key) + r"=.*$", re.M)
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text = pattern.sub(key + "=" + value, text) if pattern.search(text) else text.rstrip("\n") + "\n" + key + "=" + value + "\n"
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env_file.write_text(text)
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data_owner = PATHS["data"].stat()
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os.chown(env_file, data_owner.st_uid, data_owner.st_gid)
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os.chmod(env_file, 0o600)
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billing = json.loads(billing_file.read_text())
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if not isinstance(billing, dict) or not isinstance(billing.get("capabilities", []), list):
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raise Failure("billing-shape")
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billing["capabilities"] = sorted(set(billing.get("capabilities", []) + ["demo_fixtures"]))
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billing.pop("integrity", None)
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billing_file.write_text(json.dumps(billing))
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os.chown(billing_file, data_owner.st_uid, data_owner.st_gid)
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os.chmod(billing_file, 0o600)
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if unhealthy:
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for relative in DEMO_HISTORY:
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path = PATHS["data"] / relative
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# Never follow a writable parent symlink to a path outside the estate.
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if any(p.is_symlink() for p in path.parents if p != PATHS["data"].parent):
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raise Failure("history-symlink")
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if path.is_symlink():
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raise Failure("history-symlink")
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if path.is_file():
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path.unlink()
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def active(state):
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return state["ActiveState"] == "active" and state["SubState"] == "running" and int(state["MainPID"]) > 0
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class Transaction:
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def __init__(self, host, request, attempt):
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self.host, self.request, self.attempt = host, request, attempt
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self.receipt = {"schema_version": 2, "status": "intent", "mutated": False,
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"control_sha": request["control_sha"], "run_id": request["run_id"],
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"run_attempt": request["run_attempt"], "mode": request["mode"],
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"expected_version": request["version"], "installer_sha256": request["installer_sha256"],
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"forward": {}, "recovery": {}, "recovery_required": False}
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def save(self, status):
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self.receipt["status"] = status
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atomic_json(self.attempt / "receipt.json", self.receipt)
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def urls(self):
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return (self.request["local_url"].rstrip("/") + "/api/health", self.request["public_url"], RELAY_HEALTH)
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def healthy(self, states=None):
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return all(active(s) for s in (states or self.host.state()).values()) and all(self.host.status(url) == "200" for url in self.urls())
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def ready(self, cursors):
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deadline = self.host.now() + READY_TIMEOUT
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while True:
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self.host.check_journal(cursors)
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if self.healthy():
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return
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if self.host.now() >= deadline:
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raise Failure("listener-readiness")
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self.host.sleep(INTERVAL)
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def watch(self, phase, expected_version, cursors):
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baseline = self.host.state()
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started = self.host.now()
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evidence = self.receipt[phase]
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evidence.update({"required_seconds": WINDOW, "samples": 0, "elapsed_seconds": 0,
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"initial_services": baseline})
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while True:
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self.host.check_journal(cursors)
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state = self.host.state()
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evidence["last_services"] = state
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if state != baseline or not self.healthy(state):
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raise Failure("sustained-health")
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evidence["observed_version"] = self.host.version(self.request["local_url"])
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if evidence["observed_version"] != expected_version:
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raise Failure("runtime-version")
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evidence["samples"] += 1
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elapsed = self.host.now() - started
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evidence["elapsed_seconds"] = elapsed
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if elapsed >= WINDOW:
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return
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self.host.sleep(min(INTERVAL, WINDOW - elapsed))
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def capture(self):
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snapshot = self.attempt / "snapshot"
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size = sum(path.lstat().st_size for root in PATHS.values() if root.exists()
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for path in ([root] + (list(root.rglob("*")) if root.is_dir() else []))
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if path.is_file() and not path.is_symlink())
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# Both our independent estate and the signed installer's own backup need
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# space. Refuse shortage; never delete backups or databases for headroom.
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if any(shutil.disk_usage(parent).free < 2 * size + 64 * 1024 * 1024
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for parent in (self.attempt, PATHS["data"].parent)):
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raise Failure("snapshot-headroom")
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snapshot.mkdir(mode=0o700)
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manifest = {}
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for label, path in PATHS.items():
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manifest[label] = path.exists() or path.is_symlink()
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if manifest[label]:
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copy_path(path, snapshot / label)
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atomic_json(snapshot / "paths.json", manifest)
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digest = estate_hash(PATHS)
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self.receipt["snapshot_sha256"] = digest
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self.receipt["snapshot_retained"] = True
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return digest
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def restore(self):
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snapshot = self.attempt / "snapshot"
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for label, exists in json.loads((snapshot / "paths.json").read_text()).items():
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remove_path(PATHS[label])
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if exists:
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copy_path(snapshot / label, PATHS[label])
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if estate_hash(PATHS) != self.receipt["snapshot_sha256"]:
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raise Failure("restored-estate-identity")
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def run(self):
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old_handlers = {}
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healthy_baseline = False
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stopped = False
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original_version = ""
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states = {}
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def cancel(_signum, _frame):
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raise Failure("cancelled-forward")
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try:
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validate(self.request)
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self.host.identity(self.request["hostname"])
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for entry in ROOT.glob("attempts/*"):
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if entry == self.attempt:
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continue
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receipt = entry / "receipt.json"
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if not receipt.exists() or json.loads(receipt.read_text()).get("status") not in TERMINAL:
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raise Failure("prior-recovery-required")
|
|
states = self.host.state()
|
|
if not all(active(states[name]) for name in ("pulse-relay", "caddy")) or self.host.status(RELAY_HEALTH) != "200":
|
|
raise Failure("cohost-unhealthy")
|
|
healthy_baseline = self.healthy(states)
|
|
if healthy_baseline:
|
|
original_version = self.host.version(self.request["local_url"])
|
|
if self.request["mode"] == "recover" and original_version != self.request["version"].lstrip("v"):
|
|
raise Failure("recovery-source-mismatch")
|
|
elif self.request["mode"] == "update":
|
|
raise Failure("update-baseline-unhealthy")
|
|
self.receipt["healthy_baseline"] = healthy_baseline
|
|
self.receipt["baseline_services"] = states
|
|
self.receipt["baseline_version"] = original_version
|
|
old_handlers = {sig: signal.getsignal(sig) for sig in (signal.SIGTERM, signal.SIGINT, signal.SIGHUP)}
|
|
for sig in old_handlers:
|
|
signal.signal(sig, cancel)
|
|
# The no-op is observed too; an immediate healthy sample is not success.
|
|
if self.request["mode"] == "recover" and healthy_baseline and self.host.profile_matches(self.request):
|
|
self.watch("forward", original_version, self.host.cursors())
|
|
self.save("healthy_noop")
|
|
return 0
|
|
self.save("capturing")
|
|
stopped = True
|
|
self.host.stop()
|
|
self.capture()
|
|
self.save("applying")
|
|
self.receipt["mutated"] = True
|
|
cursors = self.host.cursors()
|
|
if self.request["mode"] == "update":
|
|
self.host.install(self.attempt, self.request)
|
|
# The installer may start the unit; finish profile work quiescent.
|
|
self.host.stop()
|
|
self.host.profile(self.request, not healthy_baseline)
|
|
self.host.start()
|
|
self.ready(cursors)
|
|
self.watch("forward", self.request["version"].lstrip("v"), cursors)
|
|
# No unrelated Relay/Caddy restart is owned by this transaction.
|
|
final = self.host.state()
|
|
for service in ("pulse-relay", "caddy"):
|
|
if final[service] != states[service]:
|
|
raise Failure("cohost-identity-changed")
|
|
self.save("committed")
|
|
return 0
|
|
except Exception as exc:
|
|
self.receipt["failure"] = str(exc) if isinstance(exc, Failure) else "transaction-observation"
|
|
# Owned restoration, observation and the terminal receipt survive cancellation.
|
|
for sig in old_handlers:
|
|
signal.signal(sig, signal.SIG_IGN)
|
|
if stopped:
|
|
try:
|
|
self.save("recovering")
|
|
self.host.stop()
|
|
if "snapshot_sha256" in self.receipt:
|
|
self.restore()
|
|
if not healthy_baseline:
|
|
self.receipt["recovery_required"] = True
|
|
self.receipt["rollback"] = "unavailable-unhealthy-baseline"
|
|
self.save("recovery_required")
|
|
else:
|
|
cursors = self.host.cursors()
|
|
self.host.start()
|
|
self.ready(cursors)
|
|
self.watch("recovery", original_version, cursors)
|
|
final = self.host.state()
|
|
if any(final[name] != states[name] for name in ("pulse-relay", "caddy")):
|
|
raise Failure("cohost-identity-changed")
|
|
self.receipt["rollback"] = "verified"
|
|
self.save("rolled_back")
|
|
except Exception as recovery:
|
|
self.receipt["rollback"] = "failed"
|
|
self.receipt["recovery_failure"] = str(recovery) if isinstance(recovery, Failure) else "recovery-observation"
|
|
self.receipt["recovery_required"] = True
|
|
self.save("rollback_failed")
|
|
else:
|
|
self.save("refused")
|
|
return 1
|
|
finally:
|
|
for sig, handler in old_handlers.items():
|
|
signal.signal(sig, handler)
|
|
|
|
|
|
def main():
|
|
# Attempt paths are generated by the fixed CI bootstrap, not CLI overrides.
|
|
if len(sys.argv) != 2:
|
|
return 2
|
|
attempt = Path(sys.argv[1])
|
|
if attempt.parent != ROOT / "attempts" or not re.fullmatch(r"[0-9a-f]{64}", attempt.name) or attempt.is_symlink():
|
|
return 2
|
|
request = json.loads((attempt / "request.json").read_text())
|
|
transaction = Transaction(Host(), request, attempt)
|
|
fd = None
|
|
try:
|
|
LOCK.parent.mkdir(mode=0o700, parents=True, exist_ok=True)
|
|
fd = os.open(LOCK, os.O_RDWR | os.O_CREAT | os.O_NOFOLLOW, 0o600)
|
|
fcntl.flock(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
|
|
return transaction.run()
|
|
except (OSError, ValueError):
|
|
transaction.receipt["failure"] = "host-lock-unavailable"
|
|
transaction.save("refused")
|
|
return 1
|
|
finally:
|
|
if fd is not None:
|
|
os.close(fd)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(main())
|