259 lines
16 KiB
Python
259 lines
16 KiB
Python
#!/usr/bin/env python3
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"""GuestOps dedicated-Compose operations. Never prints credentials or provider data."""
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import argparse
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import contextlib
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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 stat
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import subprocess
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import sys
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import tarfile
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import tempfile
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import time
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import urllib.request
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import uuid
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ROOT = Path(__file__).resolve().parents[1]
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FILES = {"mongo.archive.gz", "keys.tar.gz", "configuration.json", "manifest.json"}
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LIMIT = 8 * 1024**3
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def require(condition, message):
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if not condition:
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raise RuntimeError(message)
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def run(args, *, output=None, input_file=None, timeout=900):
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# Provider output may contain secrets; errors identify only the program.
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result = subprocess.run(args, cwd=ROOT, stdin=input_file or subprocess.DEVNULL,
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stdout=output or subprocess.PIPE, stderr=subprocess.PIPE, timeout=timeout)
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require(result.returncode == 0, f"{args[0]} step failed. Check the private operator environment; no command output was logged.")
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return result.stdout or b""
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def compose(*args, **kwargs):
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return run(["docker", "compose", *args], **kwargs)
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def digest(path):
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with path.open("rb") as stream:
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return hashlib.file_digest(stream, "sha256").hexdigest()
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def image_id(image):
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require(not image.startswith("-"), "Invalid image reference.")
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return run(["docker", "image", "inspect", "--format", "{{.Id}}", image]).decode().strip()
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def provider_configured(config, target):
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section = "Pms" if target == "/run/guestops/pms.json" else "Payments"
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# Only the exact shipped empty template is public; unknown settings fail closed.
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return config not in ({}, {section: {"Hotels": {}}})
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AUTH = 'const c=new Mongo("mongodb://127.0.0.1"); c.getDB("admin").auth(process.env.MONGO_INITDB_ROOT_USERNAME,process.env.MONGO_INITDB_ROOT_PASSWORD);'
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INVENTORY = 'const d=c.getDB("guestops"); print(JSON.stringify({bytes:d.stats().storageSize+d.stats().indexSize,collections:Object.fromEntries(d.getCollectionNames().filter(n=>!n.startsWith("system.")).sort().map(n=>[n,{count:d.getCollection(n).countDocuments({}),indexes:d.getCollection(n).getIndexes().map(i=>{delete i.ns;return i;}).sort((a,b)=>a.name.localeCompare(b.name))}]))}));'
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def mongo(script):
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return compose("exec", "-T", "mongo", "mongosh", "--quiet", "--nodb", "--eval", AUTH + script)
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def configuration():
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config = json.loads(compose("config", "--format", "json"))
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services = config["services"]
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require(set(services) == {"api", "worker", "mongo"}, "This tool supports the dedicated three-service GuestOps Compose deployment only.")
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require(not services["mongo"].get("ports"), "MongoDB must not have published ports.")
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ports = services["api"].get("ports", [])
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require(len(ports) == 1 and ports[0].get("host_ip") == "127.0.0.1" and int(ports[0]["target"]) == 8080, "API must publish only port 8080 on loopback.")
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require(not services["worker"].get("ports"), "Worker must not publish ports.")
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for name in ("api", "worker"):
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env = services[name]["environment"]
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require(env.get("Mongo__Database") == "guestops" and "@mongo:27017/guestops?" in env.get("Mongo__ConnectionString", ""), "Backup supports only the dedicated Compose guestops database.")
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require(str(env.get("Preview", "false")).lower() != "true", "Production preview is forbidden.")
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require(env.get("Keys__Path") == "/var/lib/guestops/keys", "Unexpected key directory.")
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require(services["api"]["environment"].get("ASPNETCORE_ENVIRONMENT") == "Production", "API must use Production environment.")
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require(re.fullmatch(r"https://[A-Za-z0-9.-]+", services["api"]["environment"].get("PublicUrl", "")), "PublicUrl must be an HTTPS hostname without a path.")
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key_sources = []
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for name in ("api", "worker"):
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keys = [v for v in services[name].get("volumes", []) if v["target"] == "/var/lib/guestops/keys"]
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require(len(keys) == 1 and keys[0]["type"] == "volume", "API and worker require a shared persistent key volume.")
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key_sources.append(keys[0]["source"])
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require(key_sources[0] == key_sources[1], "API and worker key volumes differ.")
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return config
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def preflight(args):
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config = configuration()
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env_file = ROOT / ".env"
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require(env_file.is_file() and not env_file.is_symlink(), "Create a private .env file before deployment.")
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require(stat.S_IMODE(env_file.stat().st_mode) & 0o077 == 0, ".env must not be accessible to group or other users.")
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require(shutil.disk_usage(ROOT).free >= 8 * 1024**3, "Keep at least 8 GiB free before deployment; allow extra room for backups.")
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for name, service in config["services"].items():
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image_id(service["image"])
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for volume in service.get("volumes", []):
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if volume["type"] == "bind":
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require(Path(volume["source"]).exists(), f"A required {name} bind mount is missing.")
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if volume["target"] in ("/run/guestops/pms.json", "/run/guestops/payments.json"):
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provider = Path(volume["source"])
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if provider_configured(json.loads(provider.read_text()), volume["target"]):
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require(stat.S_IMODE(provider.stat().st_mode) & 0o077 == 0, "Configured provider files must not be accessible to group or other users.")
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if not args.offline:
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url = config["services"]["api"]["environment"]["PublicUrl"]
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require(re.fullmatch(r"https://[A-Za-z0-9.-]+", url), "PublicUrl must be an HTTPS hostname without a path.")
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with urllib.request.urlopen(url + "/health/ready", timeout=15) as response:
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require(response.url == url + "/health/ready" and json.load(response) == {"status": "ready"}, "Public HTTPS readiness failed.")
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print("Preflight passed: private database, loopback API, production settings, images, mounts and disk headroom" + ("; HTTPS not checked." if args.offline else "; public HTTPS and database readiness checked."))
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@contextlib.contextmanager
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def maintenance_lock():
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import fcntl
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with (ROOT / ".guestops-maintenance.lock").open("a") as lock:
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fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
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yield
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def backup(args):
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require(args.confirm_maintenance, "Backup requires --confirm-maintenance: API and workers will briefly stop.")
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require(re.fullmatch(r"[A-Fa-f0-9]{40}", args.recipient), "Use a verified full 40-character GPG recipient fingerprint.")
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run(["gpg", "--batch", "--list-keys", args.recipient])
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destination = Path(args.output).resolve()
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require(not destination.exists(), "Backup output already exists; choose a new filename.")
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require(destination.parent.is_dir(), "Create the private backup directory first.")
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require(stat.S_IMODE(destination.parent.stat().st_mode) & 0o077 == 0, "Backup directory must be private (mode 700).")
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config = configuration()
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runtime = {}
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for service in ("api", "worker", "mongo"):
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cid = compose("ps", "--status", "running", "-q", service).decode().strip()
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require(re.fullmatch(r"[a-f0-9]{12,64}", cid), f"Exactly one running {service} container is required.")
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runtime[service] = json.loads(run(["docker", "inspect", cid]))[0]
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require(shutil.disk_usage(destination.parent).free >= 3 * json.loads(mongo(INVENTORY))["bytes"] + 1024**3, "Insufficient free space for a consistent encrypted backup.")
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partial = destination.with_name(destination.name + ".partial-" + uuid.uuid4().hex)
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with maintenance_lock(), tempfile.TemporaryDirectory(prefix="guestops-backup-", dir=destination.parent) as folder:
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folder = Path(folder)
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stopped = False
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ttl = None
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try:
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# Set before stopping so partial stop failures also attempt recovery.
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stopped = True
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compose("stop", "-t", "150", "api", "worker")
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ttl = json.loads(mongo('print(JSON.stringify(c.getDB("admin").runCommand({getParameter:1,ttlMonitorEnabled:1}).ttlMonitorEnabled));'))
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require(isinstance(ttl, bool), "Cannot determine MongoDB TTL monitor state.")
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mongo('const r=c.getDB("admin").runCommand({setParameter:1,ttlMonitorEnabled:false});if(!r.ok)quit(1);')
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inventory = json.loads(mongo(INVENTORY))
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dump = 'set -eu; case "$MONGO_INITDB_ROOT_PASSWORD" in ""|*[!0-9a-fA-F]*) exit 1;; esac; umask 077; cfg=$(mktemp); trap \'rm -f "$cfg"\' EXIT; printf \'password: "%s"\\n\' "$MONGO_INITDB_ROOT_PASSWORD" > "$cfg"; mongodump --config "$cfg" --username "$MONGO_INITDB_ROOT_USERNAME" --authenticationDatabase admin --db guestops --archive --gzip'
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with (folder / "mongo.archive.gz").open("wb") as output:
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compose("exec", "-T", "mongo", "sh", "-c", dump, output=output)
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probe = compose("run", "--rm", "--no-deps", "-T", "-e", "Logging__LogLevel__Default=None", "api", "--backup-probe").decode().strip()
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require(re.fullmatch(r"[A-Za-z0-9_-]{20,4096}", probe), "Key probe did not return a valid protected value.")
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with (folder / "keys.tar.gz").open("wb") as output:
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compose("run", "--rm", "--no-deps", "-T", "--entrypoint", "tar", "api", "-C", "/var/lib/guestops/keys", "-czf", "-", ".", output=output)
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mounted = {}
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for volume in config["services"]["api"].get("volumes", []):
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if volume["type"] == "bind" and volume["target"] in ("/run/guestops/pms.json", "/run/guestops/payments.json"):
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mounted[volume["target"]] = Path(volume["source"]).read_text()
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(folder / "configuration.json").write_text(json.dumps({"compose": config, "runtime": runtime, "providerFiles": mounted}))
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manifest = {"format": 1, "createdAt": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime()), "inventory": inventory, "probe": probe, "apiImageId": runtime["api"]["Image"], "mongoImageId": runtime["mongo"]["Image"], "sha256": {name: digest(folder / name) for name in FILES - {"manifest.json"}}}
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(folder / "manifest.json").write_text(json.dumps(manifest))
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finally:
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try:
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if ttl is not None:
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mongo('const r=c.getDB("admin").runCommand({setParameter:1,ttlMonitorEnabled:' + str(ttl).lower() + '});if(!r.ok)quit(1);')
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finally:
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if stopped:
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compose("start", "api", "worker")
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try:
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with tarfile.open(folder / "bundle.tar", "w") as archive:
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for name in sorted(FILES):
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archive.add(folder / name, arcname=name, recursive=False)
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run(["gpg", "--batch", "--trust-model", "always", "--recipient", args.recipient, "--output", str(partial), "--encrypt", str(folder / "bundle.tar")])
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os.link(partial, destination) # Atomic publication, never overwrite an existing backup.
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finally:
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partial.unlink(missing_ok=True)
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print("Encrypted backup complete. Copy it off-server and perform a restore drill.")
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def unpack(bundle, folder):
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with tarfile.open(bundle, "r:") as archive:
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members = archive.getmembers()
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require(len(members) == len(FILES) and {m.name for m in members} == FILES, "Unexpected backup members.")
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require(all(m.isfile() and 0 <= m.size <= LIMIT for m in members) and sum(m.size for m in members) <= LIMIT, "Invalid or oversized backup members.")
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for member in members:
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with archive.extractfile(member) as source, (folder / member.name).open("xb") as output:
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shutil.copyfileobj(source, output)
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manifest = json.loads((folder / "manifest.json").read_text())
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require(manifest.get("format") == 1 and set(manifest.get("sha256", {})) == FILES - {"manifest.json"}, "Unsupported backup format.")
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for name, expected in manifest["sha256"].items():
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require(digest(folder / name) == expected, "Backup checksum verification failed.")
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return manifest
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def restore_drill(args):
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backup_file = Path(args.backup).resolve()
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require(backup_file.is_file(), "Backup file is missing.")
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with tempfile.TemporaryDirectory(prefix="guestops-restore-", dir=ROOT) as temp:
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folder = Path(temp)
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run(["gpg", "--batch", "--max-output", str(LIMIT), "--output", str(folder / "bundle.tar"), "--decrypt", str(backup_file)])
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require((folder / "bundle.tar").stat().st_size <= LIMIT, "Decrypted bundle exceeds the 8 GiB pilot limit.")
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manifest = unpack(folder / "bundle.tar", folder)
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require(image_id(args.api_image) == manifest["apiImageId"] and image_id(args.mongo_image) == manifest["mongoImageId"], "Load the exact trusted API and MongoDB images used for this backup.")
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require(shutil.disk_usage(ROOT).free > 3 * manifest["inventory"]["bytes"] + 1024**3, "Insufficient restore drill space.")
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keys = folder / "keys"
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keys.mkdir(mode=0o700)
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with tarfile.open(folder / "keys.tar.gz", "r:gz") as archive:
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total = 0
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for member in archive:
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if member.name in (".", "./") and member.isdir():
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continue
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name = member.name.removeprefix("./")
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total += member.size
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require(member.isfile() and re.fullmatch(r"[A-Za-z0-9_-]+\.xml", name) and member.size < 1024**2 and total < 16 * 1024**2, "Invalid key archive.")
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with archive.extractfile(member) as source, (keys / name).open("xb") as output:
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shutil.copyfileobj(source, output)
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run(["docker", "run", "--rm", "--pull", "never", "--network", "none", "--user", "0:0", "--read-only", "--mount", f"type=bind,src={keys},dst=/var/lib/guestops/keys,readonly", "-e", "Logging__LogLevel__Default=None", "-e", "BACKUP_PROBE=" + manifest["probe"], args.api_image, "--verify-backup-probe"])
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cid = run(["docker", "run", "-d", "--pull", "never", "--network", "none", "--memory", "1g", "--label", "guestops.restore-drill=true", args.mongo_image, "--bind_ip", "127.0.0.1", "--setParameter", "ttlMonitorEnabled=false"]).decode().strip()
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require(re.fullmatch(r"[a-f0-9]{64}", cid), "Unexpected restore container identifier.")
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try:
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for attempt in range(30):
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try:
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run(["docker", "exec", cid, "mongosh", "--quiet", "--eval", "db.adminCommand({ping:1})"], timeout=10)
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break
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except RuntimeError:
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if attempt == 29:
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raise
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time.sleep(1)
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with (folder / "mongo.archive.gz").open("rb") as source:
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run(["docker", "exec", "-i", cid, "mongorestore", "--archive", "--gzip", "--nsInclude", "guestops.*"], input_file=source)
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restored = json.loads(run(["docker", "exec", cid, "mongosh", "--quiet", "--nodb", "--eval", 'const c=new Mongo("mongodb://127.0.0.1");' + INVENTORY]))
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require(restored["collections"] == manifest["inventory"]["collections"], "Restored collection counts or indexes differ.")
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finally:
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run(["docker", "rm", "-f", "-v", cid]) # Only the exact container created above and its anonymous volumes.
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print("Restore drill passed: collection counts, indexes and actual key decryption verified in isolated containers. Production was not restored or modified.")
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def main():
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require(os.name == "posix", "Run deployment operations on Linux.")
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os.umask(0o077)
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parser = argparse.ArgumentParser(description=__doc__)
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subs = parser.add_subparsers(dest="command", required=True)
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check = subs.add_parser("preflight"); check.add_argument("--offline", action="store_true")
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save = subs.add_parser("backup"); save.add_argument("--recipient", required=True); save.add_argument("--output", required=True); save.add_argument("--confirm-maintenance", action="store_true")
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drill = subs.add_parser("restore-drill"); drill.add_argument("backup"); drill.add_argument("--api-image", required=True); drill.add_argument("--mongo-image", default="mongo:8.0")
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args = parser.parse_args()
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{"preflight": preflight, "backup": backup, "restore-drill": restore_drill}[args.command](args)
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if __name__ == "__main__":
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try:
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main()
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except Exception as error:
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# Never include subprocess output, config values or parsed guest data.
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print(str(error) if isinstance(error, RuntimeError) else "Operation failed (" + type(error).__name__ + "). No sensitive details were logged.", file=sys.stderr)
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sys.exit(1)
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