587 lines
24 KiB
Python
587 lines
24 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2017-2019 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Class for lbrycrdd node under test"""
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import contextlib
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import decimal
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import errno
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from enum import Enum
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import http.client
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import json
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import logging
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import os
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import re
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import subprocess
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import tempfile
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import time
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import urllib.parse
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import collections
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import shlex
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import sys
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from .authproxy import JSONRPCException
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from .util import (
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MAX_NODES,
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append_config,
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delete_cookie_file,
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get_rpc_proxy,
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rpc_url,
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wait_until,
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p2p_port,
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)
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LBRYCRDD_PROC_WAIT_TIMEOUT = 60
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class FailedToStartError(Exception):
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"""Raised when a node fails to start correctly."""
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class ErrorMatch(Enum):
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FULL_TEXT = 1
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FULL_REGEX = 2
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PARTIAL_REGEX = 3
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class TestNode():
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"""A class for representing a lbrycrdd node under test.
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This class contains:
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- state about the node (whether it's running, etc)
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- a Python subprocess.Popen object representing the running process
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- an RPC connection to the node
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- one or more P2P connections to the node
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To make things easier for the test writer, any unrecognised messages will
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be dispatched to the RPC connection."""
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def __init__(self, i, datadir, *, chain, rpchost, timewait, lbrycrdd, lbrycrd_cli, coverage_dir, cwd, extra_conf=None, extra_args=None, use_cli=False, start_perf=False):
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"""
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Kwargs:
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start_perf (bool): If True, begin profiling the node with `perf` as soon as
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the node starts.
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"""
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self.index = i
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self.datadir = datadir
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self.lbrycrdconf = os.path.join(self.datadir, "lbrycrd.conf")
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self.stdout_dir = os.path.join(self.datadir, "stdout")
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self.stderr_dir = os.path.join(self.datadir, "stderr")
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self.chain = chain
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self.rpchost = rpchost
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self.rpc_timeout = timewait
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self.binary = lbrycrdd
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self.coverage_dir = coverage_dir
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self.cwd = cwd
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if extra_conf is not None:
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append_config(datadir, extra_conf)
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# Most callers will just need to add extra args to the standard list below.
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# For those callers that need more flexibility, they can just set the args property directly.
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# Note that common args are set in the config file (see initialize_datadir)
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self.extra_args = extra_args
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# Configuration for logging is set as command-line args rather than in the bitcoin.conf file.
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# This means that starting a bitcoind using the temp dir to debug a failed test won't
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# spam debug.log.
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self.args = [
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self.binary,
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"-datadir=" + self.datadir,
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"-logtimemicros",
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"-logthreadnames",
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"-debug",
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"-debugexclude=libevent",
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"-debugexclude=leveldb",
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"-uacomment=testnode%d" % i,
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]
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self.cli = TestNodeCLI(lbrycrd_cli, self.datadir)
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self.use_cli = use_cli
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self.start_perf = start_perf
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self.running = False
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self.process = None
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self.rpc_connected = False
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self.rpc = None
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self.url = None
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self.log = logging.getLogger('TestFramework.node%d' % i)
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self.cleanup_on_exit = True # Whether to kill the node when this object goes away
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# Cache perf subprocesses here by their data output filename.
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self.perf_subprocesses = {}
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self.p2ps = []
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AddressKeyPair = collections.namedtuple('AddressKeyPair', ['address', 'key'])
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PRIV_KEYS = [
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# address , privkey
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AddressKeyPair('mjTkW3DjgyZck4KbiRusZsqTgaYTxdSz6z', 'cVpF924EspNh8KjYsfhgY96mmxvT6DgdWiTYMtMjuM74hJaU5psW'),
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AddressKeyPair('msX6jQXvxiNhx3Q62PKeLPrhrqZQdSimTg', 'cUxsWyKyZ9MAQTaAhUQWJmBbSvHMwSmuv59KgxQV7oZQU3PXN3KE'),
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AddressKeyPair('mnonCMyH9TmAsSj3M59DsbH8H63U3RKoFP', 'cTrh7dkEAeJd6b3MRX9bZK8eRmNqVCMH3LSUkE3dSFDyzjU38QxK'),
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AddressKeyPair('mqJupas8Dt2uestQDvV2NH3RU8uZh2dqQR', 'cVuKKa7gbehEQvVq717hYcbE9Dqmq7KEBKqWgWrYBa2CKKrhtRim'),
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AddressKeyPair('msYac7Rvd5ywm6pEmkjyxhbCDKqWsVeYws', 'cQDCBuKcjanpXDpCqacNSjYfxeQj8G6CAtH1Dsk3cXyqLNC4RPuh'),
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AddressKeyPair('n2rnuUnwLgXqf9kk2kjvVm8R5BZK1yxQBi', 'cQakmfPSLSqKHyMFGwAqKHgWUiofJCagVGhiB4KCainaeCSxeyYq'),
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AddressKeyPair('myzuPxRwsf3vvGzEuzPfK9Nf2RfwauwYe6', 'cQMpDLJwA8DBe9NcQbdoSb1BhmFxVjWD5gRyrLZCtpuF9Zi3a9RK'),
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AddressKeyPair('mumwTaMtbxEPUswmLBBN3vM9oGRtGBrys8', 'cSXmRKXVcoouhNNVpcNKFfxsTsToY5pvB9DVsFksF1ENunTzRKsy'),
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AddressKeyPair('mpV7aGShMkJCZgbW7F6iZgrvuPHjZjH9qg', 'cSoXt6tm3pqy43UMabY6eUTmR3eSUYFtB2iNQDGgb3VUnRsQys2k'),
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AddressKeyPair('mq4fBNdckGtvY2mijd9am7DRsbRB4KjUkf', 'cN55daf1HotwBAgAKWVgDcoppmUNDtQSfb7XLutTLeAgVc3u8hik'),
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AddressKeyPair('mpFAHDjX7KregM3rVotdXzQmkbwtbQEnZ6', 'cT7qK7g1wkYEMvKowd2ZrX1E5f6JQ7TM246UfqbCiyF7kZhorpX3'),
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AddressKeyPair('mzRe8QZMfGi58KyWCse2exxEFry2sfF2Y7', 'cPiRWE8KMjTRxH1MWkPerhfoHFn5iHPWVK5aPqjW8NxmdwenFinJ'),
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]
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def get_deterministic_priv_key(self):
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"""Return a deterministic priv key in base58, that only depends on the node's index"""
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assert len(self.PRIV_KEYS) == MAX_NODES
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return self.PRIV_KEYS[self.index]
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def get_mem_rss_kilobytes(self):
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"""Get the memory usage (RSS) per `ps`.
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Returns None if `ps` is unavailable.
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"""
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assert self.running
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try:
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return int(subprocess.check_output(
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["ps", "h", "-o", "rss", "{}".format(self.process.pid)],
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stderr=subprocess.DEVNULL).split()[-1])
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# Avoid failing on platforms where ps isn't installed.
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#
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# We could later use something like `psutils` to work across platforms.
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except (FileNotFoundError, subprocess.SubprocessError):
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self.log.exception("Unable to get memory usage")
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return None
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def _node_msg(self, msg: str) -> str:
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"""Return a modified msg that identifies this node by its index as a debugging aid."""
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return "[node %d] %s" % (self.index, msg)
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def _raise_assertion_error(self, msg: str):
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"""Raise an AssertionError with msg modified to identify this node."""
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raise AssertionError(self._node_msg(msg))
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def __del__(self):
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# Ensure that we don't leave any lbrycrdd processes lying around after
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# the test ends
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if self.process and self.cleanup_on_exit:
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# Should only happen on test failure
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# Avoid using logger, as that may have already been shutdown when
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# this destructor is called.
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print(self._node_msg("Cleaning up leftover process"))
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self.process.kill()
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def __getattr__(self, name):
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"""Dispatches any unrecognised messages to the RPC connection or a CLI instance."""
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if self.use_cli:
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return getattr(self.cli, name)
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else:
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assert self.rpc_connected and self.rpc is not None, self._node_msg("Error: no RPC connection")
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return getattr(self.rpc, name)
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def start(self, extra_args=None, *, cwd=None, stdout=None, stderr=None, **kwargs):
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"""Start the node."""
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if extra_args is None:
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extra_args = self.extra_args
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# Add a new stdout and stderr file each time lbrycrdd is started
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if stderr is None:
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stderr = tempfile.NamedTemporaryFile(dir=self.stderr_dir, delete=False)
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if stdout is None:
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stdout = tempfile.NamedTemporaryFile(dir=self.stdout_dir, delete=False)
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self.stderr = stderr
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self.stdout = stdout
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if cwd is None:
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cwd = self.cwd
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# Delete any existing cookie file -- if such a file exists (eg due to
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# unclean shutdown), it will get overwritten anyway by lbrycrdd, and
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# potentially interfere with our attempt to authenticate
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delete_cookie_file(self.datadir, self.chain)
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# add environment variable LIBC_FATAL_STDERR_=1 so that libc errors are written to stderr and not the terminal
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subp_env = dict(os.environ, LIBC_FATAL_STDERR_="1")
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self.process = subprocess.Popen(self.args + extra_args, env=subp_env, stdout=stdout, stderr=stderr, cwd=cwd, **kwargs)
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self.running = True
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self.log.debug("lbrycrdd started, waiting for RPC to come up")
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if self.start_perf:
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self._start_perf()
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def wait_for_rpc_connection(self):
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"""Sets up an RPC connection to the lbrycrdd process. Returns False if unable to connect."""
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# Poll at a rate of four times per second
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poll_per_s = 4
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for _ in range(poll_per_s * self.rpc_timeout):
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if self.process.poll() is not None:
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raise FailedToStartError(self._node_msg(
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'lbrycrdd exited with status {} during initialization'.format(self.process.returncode)))
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try:
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rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.chain, self.rpchost), self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir)
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rpc.getblockcount()
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# If the call to getblockcount() succeeds then the RPC connection is up
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self.log.debug("RPC successfully started")
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if self.use_cli:
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return
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self.rpc = rpc
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self.rpc_connected = True
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self.url = self.rpc.url
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return
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except IOError as e:
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if e.errno != errno.ECONNREFUSED: # Port not yet open?
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raise # unknown IO error
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except JSONRPCException as e: # Initialization phase
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# -28 RPC in warmup
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# -342 Service unavailable, RPC server started but is shutting down due to error
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if e.error['code'] != -28 and e.error['code'] != -342:
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raise # unknown JSON RPC exception
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except ValueError as e: # cookie file not found and no rpcuser or rpcassword. lbrycrdd still starting
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if "No RPC credentials" not in str(e):
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raise
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time.sleep(1.0 / poll_per_s)
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self._raise_assertion_error("Unable to connect to lbrycrdd")
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def generate(self, nblocks, maxtries=1000000):
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self.log.debug("TestNode.generate() dispatches `generate` call to `generatetoaddress`")
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return self.generatetoaddress(nblocks=nblocks, address=self.get_deterministic_priv_key().address, maxtries=maxtries)
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def get_wallet_rpc(self, wallet_name):
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if self.use_cli:
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return self.cli("-rpcwallet={}".format(wallet_name))
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else:
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assert self.rpc_connected and self.rpc, self._node_msg("RPC not connected")
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wallet_path = "wallet/{}".format(urllib.parse.quote(wallet_name))
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return self.rpc / wallet_path
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def stop_node(self, expected_stderr='', wait=0):
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"""Stop the node."""
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if not self.running:
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return
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self.log.debug("Stopping node")
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try:
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self.stop(wait=wait)
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except http.client.CannotSendRequest:
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self.log.exception("Unable to stop node.")
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# If there are any running perf processes, stop them.
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for profile_name in tuple(self.perf_subprocesses.keys()):
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self._stop_perf(profile_name)
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# Check that stderr is as expected
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self.stderr.seek(0)
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stderr = self.stderr.read().decode('utf-8').strip()
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if stderr != expected_stderr:
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raise AssertionError("Unexpected stderr {} != {}".format(stderr, expected_stderr))
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self.stdout.close()
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self.stderr.close()
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del self.p2ps[:]
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def is_node_stopped(self):
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"""Checks whether the node has stopped.
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Returns True if the node has stopped. False otherwise.
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This method is responsible for freeing resources (self.process)."""
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if not self.running:
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return True
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return_code = self.process.poll()
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if return_code is None:
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return False
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# process has stopped. Assert that it didn't return an error code.
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assert return_code == 0, self._node_msg(
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"Node returned non-zero exit code (%d) when stopping" % return_code)
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self.running = False
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self.process = None
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self.rpc_connected = False
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self.rpc = None
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self.log.debug("Node stopped")
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return True
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def wait_until_stopped(self, timeout=LBRYCRDD_PROC_WAIT_TIMEOUT):
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wait_until(self.is_node_stopped, timeout=timeout)
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@contextlib.contextmanager
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def assert_debug_log(self, expected_msgs, timeout=2):
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time_end = time.time() + timeout
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debug_log = os.path.join(self.datadir, self.chain, 'debug.log')
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with open(debug_log, encoding='utf-8') as dl:
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dl.seek(0, 2)
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prev_size = dl.tell()
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yield
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while True:
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found = True
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with open(debug_log, encoding='utf-8') as dl:
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dl.seek(prev_size)
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log = dl.read()
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print_log = " - " + "\n - ".join(log.splitlines())
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for expected_msg in expected_msgs:
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if re.search(re.escape(expected_msg), log, flags=re.MULTILINE) is None:
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found = False
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if found:
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return
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if time.time() >= time_end:
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break
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time.sleep(0.05)
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self._raise_assertion_error('Expected messages "{}" does not partially match log:\n\n{}\n\n'.format(str(expected_msgs), print_log))
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@contextlib.contextmanager
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def assert_memory_usage_stable(self, *, increase_allowed=0.03):
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"""Context manager that allows the user to assert that a node's memory usage (RSS)
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hasn't increased beyond some threshold percentage.
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Args:
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increase_allowed (float): the fractional increase in memory allowed until failure;
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e.g. `0.12` for up to 12% increase allowed.
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"""
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before_memory_usage = self.get_mem_rss_kilobytes()
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yield
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after_memory_usage = self.get_mem_rss_kilobytes()
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if not (before_memory_usage and after_memory_usage):
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self.log.warning("Unable to detect memory usage (RSS) - skipping memory check.")
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return
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perc_increase_memory_usage = (after_memory_usage / before_memory_usage) - 1
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if perc_increase_memory_usage > increase_allowed:
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self._raise_assertion_error(
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"Memory usage increased over threshold of {:.3f}% from {} to {} ({:.3f}%)".format(
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increase_allowed * 100, before_memory_usage, after_memory_usage,
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perc_increase_memory_usage * 100))
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@contextlib.contextmanager
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def profile_with_perf(self, profile_name):
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"""
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Context manager that allows easy profiling of node activity using `perf`.
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See `test/functional/README.md` for details on perf usage.
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Args:
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profile_name (str): This string will be appended to the
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profile data filename generated by perf.
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"""
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subp = self._start_perf(profile_name)
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yield
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if subp:
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self._stop_perf(profile_name)
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def _start_perf(self, profile_name=None):
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"""Start a perf process to profile this node.
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Returns the subprocess running perf."""
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subp = None
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def test_success(cmd):
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return subprocess.call(
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# shell=True required for pipe use below
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cmd, shell=True,
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stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL) == 0
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if not sys.platform.startswith('linux'):
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self.log.warning("Can't profile with perf; only available on Linux platforms")
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return None
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if not test_success('which perf'):
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self.log.warning("Can't profile with perf; must install perf-tools")
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return None
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if not test_success('readelf -S {} | grep .debug_str'.format(shlex.quote(self.binary))):
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self.log.warning(
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"perf output won't be very useful without debug symbols compiled into bitcoind")
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output_path = tempfile.NamedTemporaryFile(
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dir=self.datadir,
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prefix="{}.perf.data.".format(profile_name or 'test'),
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delete=False,
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).name
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cmd = [
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'perf', 'record',
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'-g', # Record the callgraph.
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'--call-graph', 'dwarf', # Compatibility for gcc's --fomit-frame-pointer.
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'-F', '101', # Sampling frequency in Hz.
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'-p', str(self.process.pid),
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'-o', output_path,
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]
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subp = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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self.perf_subprocesses[profile_name] = subp
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return subp
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def _stop_perf(self, profile_name):
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"""Stop (and pop) a perf subprocess."""
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subp = self.perf_subprocesses.pop(profile_name)
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output_path = subp.args[subp.args.index('-o') + 1]
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subp.terminate()
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subp.wait(timeout=10)
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stderr = subp.stderr.read().decode()
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if 'Consider tweaking /proc/sys/kernel/perf_event_paranoid' in stderr:
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self.log.warning(
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"perf couldn't collect data! Try "
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"'sudo sysctl -w kernel.perf_event_paranoid=-1'")
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else:
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report_cmd = "perf report -i {}".format(output_path)
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self.log.info("See perf output by running '{}'".format(report_cmd))
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def assert_start_raises_init_error(self, extra_args=None, expected_msg=None, match=ErrorMatch.FULL_TEXT, *args, **kwargs):
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"""Attempt to start the node and expect it to raise an error.
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extra_args: extra arguments to pass through to lbrycrdd
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expected_msg: regex that stderr should match when lbrycrdd fails
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Will throw if lbrycrdd starts without an error.
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Will throw if an expected_msg is provided and it does not match lbrycrdd's stdout."""
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with tempfile.NamedTemporaryFile(dir=self.stderr_dir, delete=False) as log_stderr, \
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tempfile.NamedTemporaryFile(dir=self.stdout_dir, delete=False) as log_stdout:
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try:
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self.start(extra_args, stdout=log_stdout, stderr=log_stderr, *args, **kwargs)
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self.wait_for_rpc_connection()
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self.stop_node()
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self.wait_until_stopped()
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except FailedToStartError as e:
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self.log.debug('lbrycrdd failed to start: %s', e)
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self.running = False
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self.process = None
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# Check stderr for expected message
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if expected_msg is not None:
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log_stderr.seek(0)
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stderr = log_stderr.read().decode('utf-8').strip()
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if match == ErrorMatch.PARTIAL_REGEX:
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if re.search(expected_msg, stderr, flags=re.MULTILINE) is None:
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self._raise_assertion_error(
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'Expected message "{}" does not partially match stderr:\n"{}"'.format(expected_msg, stderr))
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elif match == ErrorMatch.FULL_REGEX:
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if re.fullmatch(expected_msg, stderr) is None:
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self._raise_assertion_error(
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'Expected message "{}" does not fully match stderr:\n"{}"'.format(expected_msg, stderr))
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elif match == ErrorMatch.FULL_TEXT:
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if expected_msg != stderr:
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self._raise_assertion_error(
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'Expected message "{}" does not fully match stderr:\n"{}"'.format(expected_msg, stderr))
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else:
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if expected_msg is None:
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assert_msg = "lbrycrdd should have exited with an error"
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else:
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assert_msg = "lbrycrdd should have exited with expected error " + expected_msg
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self._raise_assertion_error(assert_msg)
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def add_p2p_connection(self, p2p_conn, *, wait_for_verack=True, **kwargs):
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"""Add a p2p connection to the node.
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This method adds the p2p connection to the self.p2ps list and also
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returns the connection to the caller."""
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if 'dstport' not in kwargs:
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kwargs['dstport'] = p2p_port(self.index)
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if 'dstaddr' not in kwargs:
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kwargs['dstaddr'] = '127.0.0.1'
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p2p_conn.peer_connect(**kwargs, net=self.chain)()
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self.p2ps.append(p2p_conn)
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if wait_for_verack:
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p2p_conn.wait_for_verack()
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return p2p_conn
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@property
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def p2p(self):
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"""Return the first p2p connection
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Convenience property - most tests only use a single p2p connection to each
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node, so this saves having to write node.p2ps[0] many times."""
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assert self.p2ps, self._node_msg("No p2p connection")
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return self.p2ps[0]
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def disconnect_p2ps(self):
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"""Close all p2p connections to the node."""
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for p in self.p2ps:
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p.peer_disconnect()
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del self.p2ps[:]
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class TestNodeCLIAttr:
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def __init__(self, cli, command):
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self.cli = cli
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self.command = command
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def __call__(self, *args, **kwargs):
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return self.cli.send_cli(self.command, *args, **kwargs)
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def get_request(self, *args, **kwargs):
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return lambda: self(*args, **kwargs)
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def arg_to_cli(arg):
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if isinstance(arg, bool):
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return str(arg).lower()
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elif isinstance(arg, dict) or isinstance(arg, list):
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return json.dumps(arg)
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else:
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return str(arg)
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|
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class TestNodeCLI():
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"""Interface to bitcoin-cli for an individual node"""
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def __init__(self, binary, datadir):
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self.options = []
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self.binary = binary
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self.datadir = datadir
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self.input = None
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self.log = logging.getLogger('TestFramework.bitcoincli')
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def __call__(self, *options, input=None):
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# TestNodeCLI is callable with bitcoin-cli command-line options
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cli = TestNodeCLI(self.binary, self.datadir)
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cli.options = [str(o) for o in options]
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cli.input = input
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return cli
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def __getattr__(self, command):
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return TestNodeCLIAttr(self, command)
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def batch(self, requests):
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results = []
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for request in requests:
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try:
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results.append(dict(result=request()))
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except JSONRPCException as e:
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results.append(dict(error=e))
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return results
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def send_cli(self, command=None, *args, **kwargs):
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"""Run bitcoin-cli command. Deserializes returned string as python object."""
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pos_args = [arg_to_cli(arg) for arg in args]
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named_args = [str(key) + "=" + arg_to_cli(value) for (key, value) in kwargs.items()]
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assert not (pos_args and named_args), "Cannot use positional arguments and named arguments in the same bitcoin-cli call"
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p_args = [self.binary, "-datadir=" + self.datadir] + self.options
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if named_args:
|
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p_args += ["-named"]
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if command is not None:
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p_args += [command]
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p_args += pos_args + named_args
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self.log.debug("Running bitcoin-cli command: %s" % command)
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process = subprocess.Popen(p_args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True)
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cli_stdout, cli_stderr = process.communicate(input=self.input)
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returncode = process.poll()
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|
if returncode:
|
|
match = re.match(r'error code: ([-0-9]+)\nerror message:\n(.*)', cli_stderr)
|
|
if match:
|
|
code, message = match.groups()
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|
raise JSONRPCException(dict(code=int(code), message=message))
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|
# Ignore cli_stdout, raise with cli_stderr
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raise subprocess.CalledProcessError(returncode, self.binary, output=cli_stderr)
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|
try:
|
|
return json.loads(cli_stdout, parse_float=decimal.Decimal)
|
|
except json.JSONDecodeError:
|
|
return cli_stdout.rstrip("\n")
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