772 lines
23 KiB
Python
772 lines
23 KiB
Python
#! /somewhere/python3
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from contextlib import contextmanager
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from xml.sax.saxutils import XMLGenerator
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import _thread
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import atexit
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import os
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import pty
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import queue
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import re
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import shutil
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import socket
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import subprocess
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import sys
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import tempfile
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import time
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import unicodedata
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import ptpython.repl
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CHAR_TO_KEY = {
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"A": "shift-a",
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"N": "shift-n",
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"-": "0x0C",
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"_": "shift-0x0C",
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"B": "shift-b",
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"O": "shift-o",
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"=": "0x0D",
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"+": "shift-0x0D",
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"C": "shift-c",
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"P": "shift-p",
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"[": "0x1A",
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"{": "shift-0x1A",
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"D": "shift-d",
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"Q": "shift-q",
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"]": "0x1B",
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"}": "shift-0x1B",
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"E": "shift-e",
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"R": "shift-r",
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";": "0x27",
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":": "shift-0x27",
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"F": "shift-f",
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"S": "shift-s",
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"'": "0x28",
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'"': "shift-0x28",
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"G": "shift-g",
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"T": "shift-t",
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"`": "0x29",
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"~": "shift-0x29",
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"H": "shift-h",
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"U": "shift-u",
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"\\": "0x2B",
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"|": "shift-0x2B",
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"I": "shift-i",
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"V": "shift-v",
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",": "0x33",
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"<": "shift-0x33",
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"J": "shift-j",
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"W": "shift-w",
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".": "0x34",
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">": "shift-0x34",
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"K": "shift-k",
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"X": "shift-x",
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"/": "0x35",
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"?": "shift-0x35",
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"L": "shift-l",
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"Y": "shift-y",
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" ": "spc",
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"M": "shift-m",
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"Z": "shift-z",
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"\n": "ret",
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"!": "shift-0x02",
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"@": "shift-0x03",
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"#": "shift-0x04",
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"$": "shift-0x05",
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"%": "shift-0x06",
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"^": "shift-0x07",
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"&": "shift-0x08",
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"*": "shift-0x09",
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"(": "shift-0x0A",
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")": "shift-0x0B",
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}
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def eprint(*args, **kwargs):
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print(*args, file=sys.stderr, **kwargs)
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def create_vlan(vlan_nr):
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global log
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log.log("starting VDE switch for network {}".format(vlan_nr))
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vde_socket = os.path.abspath("./vde{}.ctl".format(vlan_nr))
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pty_master, pty_slave = pty.openpty()
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vde_process = subprocess.Popen(
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["vde_switch", "-s", vde_socket, "--dirmode", "0777"],
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bufsize=1,
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stdin=pty_slave,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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shell=False,
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)
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fd = os.fdopen(pty_master, "w")
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fd.write("version\n")
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# TODO: perl version checks if this can be read from
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# an if not, dies. we could hang here forever. Fix it.
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vde_process.stdout.readline()
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if not os.path.exists(os.path.join(vde_socket, "ctl")):
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raise Exception("cannot start vde_switch")
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return (vlan_nr, vde_socket, vde_process, fd)
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def retry(fn):
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"""Call the given function repeatedly, with 1 second intervals,
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until it returns True or a timeout is reached.
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"""
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for _ in range(900):
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if fn(False):
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return
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time.sleep(1)
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if not fn(True):
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raise Exception("action timed out")
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class Logger:
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def __init__(self):
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self.logfile = os.environ.get("LOGFILE", "/dev/null")
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self.logfile_handle = open(self.logfile, "wb")
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self.xml = XMLGenerator(self.logfile_handle, encoding="utf-8")
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self.queue = queue.Queue(1000)
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self.xml.startDocument()
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self.xml.startElement("logfile", attrs={})
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def close(self):
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self.xml.endElement("logfile")
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self.xml.endDocument()
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self.logfile_handle.close()
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def sanitise(self, message):
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return "".join(ch for ch in message if unicodedata.category(ch)[0] != "C")
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def maybe_prefix(self, message, attributes):
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if "machine" in attributes:
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return "{}: {}".format(attributes["machine"], message)
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return message
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def log_line(self, message, attributes):
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self.xml.startElement("line", attributes)
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self.xml.characters(message)
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self.xml.endElement("line")
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def log(self, message, attributes={}):
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eprint(self.maybe_prefix(message, attributes))
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self.drain_log_queue()
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self.log_line(message, attributes)
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def enqueue(self, message):
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self.queue.put(message)
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def drain_log_queue(self):
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try:
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while True:
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item = self.queue.get_nowait()
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attributes = {"machine": item["machine"], "type": "serial"}
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self.log_line(self.sanitise(item["msg"]), attributes)
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except queue.Empty:
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pass
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@contextmanager
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def nested(self, message, attributes={}):
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eprint(self.maybe_prefix(message, attributes))
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self.xml.startElement("nest", attrs={})
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self.xml.startElement("head", attributes)
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self.xml.characters(message)
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self.xml.endElement("head")
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tic = time.time()
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self.drain_log_queue()
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yield
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self.drain_log_queue()
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toc = time.time()
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self.log("({:.2f} seconds)".format(toc - tic))
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self.xml.endElement("nest")
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class Machine:
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def __init__(self, args):
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if "name" in args:
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self.name = args["name"]
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else:
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self.name = "machine"
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try:
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cmd = args["startCommand"]
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self.name = re.search("run-(.+)-vm$", cmd).group(1)
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except KeyError:
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pass
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except AttributeError:
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pass
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self.script = args.get("startCommand", self.create_startcommand(args))
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tmp_dir = os.environ.get("TMPDIR", tempfile.gettempdir())
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def create_dir(name):
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path = os.path.join(tmp_dir, name)
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os.makedirs(path, mode=0o700, exist_ok=True)
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return path
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self.state_dir = create_dir("vm-state-{}".format(self.name))
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self.shared_dir = create_dir("xchg-shared")
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self.booted = False
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self.connected = False
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self.pid = None
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self.socket = None
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self.monitor = None
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self.logger = args["log"]
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self.allow_reboot = args.get("allowReboot", False)
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@staticmethod
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def create_startcommand(args):
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net_backend = "-netdev user,id=net0"
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net_frontend = "-device virtio-net-pci,netdev=net0"
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if "netBackendArgs" in args:
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net_backend += "," + args["netBackendArgs"]
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if "netFrontendArgs" in args:
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net_frontend += "," + args["netFrontendArgs"]
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start_command = (
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"qemu-kvm -m 384 " + net_backend + " " + net_frontend + " $QEMU_OPTS "
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)
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if "hda" in args:
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hda_path = os.path.abspath(args["hda"])
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if args.get("hdaInterface", "") == "scsi":
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start_command += (
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"-drive id=hda,file="
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+ hda_path
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+ ",werror=report,if=none "
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+ "-device scsi-hd,drive=hda "
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)
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else:
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start_command += (
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"-drive file="
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+ hda_path
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+ ",if="
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+ args["hdaInterface"]
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+ ",werror=report "
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)
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if "cdrom" in args:
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start_command += "-cdrom " + args["cdrom"] + " "
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if "usb" in args:
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start_command += (
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"-device piix3-usb-uhci -drive "
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+ "id=usbdisk,file="
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+ args["usb"]
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+ ",if=none,readonly "
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+ "-device usb-storage,drive=usbdisk "
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)
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if "bios" in args:
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start_command += "-bios " + args["bios"] + " "
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start_command += args.get("qemuFlags", "")
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return start_command
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def is_up(self):
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return self.booted and self.connected
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def log(self, msg):
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self.logger.log(msg, {"machine": self.name})
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def nested(self, msg, attrs={}):
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my_attrs = {"machine": self.name}
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my_attrs.update(attrs)
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return self.logger.nested(msg, my_attrs)
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def wait_for_monitor_prompt(self):
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while True:
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answer = self.monitor.recv(1024).decode()
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if answer.endswith("(qemu) "):
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return answer
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def send_monitor_command(self, command):
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message = ("{}\n".format(command)).encode()
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self.log("sending monitor command: {}".format(command))
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self.monitor.send(message)
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return self.wait_for_monitor_prompt()
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def wait_for_unit(self, unit, user=None):
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while True:
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info = self.get_unit_info(unit, user)
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state = info["ActiveState"]
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if state == "failed":
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raise Exception('unit "{}" reached state "{}"'.format(unit, state))
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if state == "inactive":
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status, jobs = self.systemctl("list-jobs --full 2>&1", user)
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if "No jobs" in jobs:
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info = self.get_unit_info(unit)
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if info["ActiveState"] == state:
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raise Exception(
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(
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'unit "{}" is inactive and there ' "are no pending jobs"
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).format(unit)
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)
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if state == "active":
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return True
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def get_unit_info(self, unit, user=None):
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status, lines = self.systemctl('--no-pager show "{}"'.format(unit), user)
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if status != 0:
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return None
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line_pattern = re.compile(r"^([^=]+)=(.*)$")
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def tuple_from_line(line):
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match = line_pattern.match(line)
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return match[1], match[2]
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return dict(
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tuple_from_line(line)
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for line in lines.split("\n")
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if line_pattern.match(line)
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)
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def systemctl(self, q, user=None):
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if user is not None:
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q = q.replace("'", "\\'")
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return self.execute(
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(
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"su -l {} -c "
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"$'XDG_RUNTIME_DIR=/run/user/`id -u` "
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"systemctl --user {}'"
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).format(user, q)
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)
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return self.execute("systemctl {}".format(q))
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def execute(self, command):
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self.connect()
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out_command = "( {} ); echo '|!EOF' $?\n".format(command)
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self.shell.send(out_command.encode())
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output = ""
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status_code_pattern = re.compile(r"(.*)\|\!EOF\s+(\d+)")
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while True:
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chunk = self.shell.recv(4096).decode()
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match = status_code_pattern.match(chunk)
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if match:
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output += match[1]
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status_code = int(match[2])
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return (status_code, output)
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output += chunk
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def succeed(self, *commands):
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"""Execute each command and check that it succeeds."""
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for command in commands:
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with self.nested("must succeed: {}".format(command)):
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status, output = self.execute(command)
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if status != 0:
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self.log("output: {}".format(output))
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raise Exception(
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"command `{}` failed (exit code {})".format(command, status)
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)
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return output
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def fail(self, *commands):
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"""Execute each command and check that it fails."""
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for command in commands:
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with self.nested("must fail: {}".format(command)):
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status, output = self.execute(command)
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if status == 0:
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raise Exception(
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"command `{}` unexpectedly succeeded".format(command)
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)
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def wait_until_succeeds(self, command):
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with self.nested("waiting for success: {}".format(command)):
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while True:
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status, output = self.execute(command)
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if status == 0:
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return output
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def wait_until_fails(self, command):
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with self.nested("waiting for failure: {}".format(command)):
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while True:
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status, output = self.execute(command)
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if status != 0:
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return output
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def wait_for_shutdown(self):
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if not self.booted:
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return
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with self.nested("waiting for the VM to power off"):
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sys.stdout.flush()
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self.process.wait()
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self.pid = None
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self.booted = False
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self.connected = False
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def get_tty_text(self, tty):
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status, output = self.execute(
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"fold -w$(stty -F /dev/tty{0} size | "
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"awk '{{print $2}}') /dev/vcs{0}".format(tty)
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)
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return output
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def wait_until_tty_matches(self, tty, regexp):
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matcher = re.compile(regexp)
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with self.nested("waiting for {} to appear on tty {}".format(regexp, tty)):
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while True:
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text = self.get_tty_text(tty)
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if len(matcher.findall(text)) > 0:
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return True
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def send_chars(self, chars):
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with self.nested("sending keys ‘{}‘".format(chars)):
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for char in chars:
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self.send_key(char)
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def wait_for_file(self, filename):
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with self.nested("waiting for file ‘{}‘".format(filename)):
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while True:
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status, _ = self.execute("test -e {}".format(filename))
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if status == 0:
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return True
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def wait_for_open_port(self, port):
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def port_is_open(_):
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status, _ = self.execute("nc -z localhost {}".format(port))
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return status == 0
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with self.nested("waiting for TCP port {}".format(port)):
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retry(port_is_open)
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def wait_for_closed_port(self, port):
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def port_is_closed(_):
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status, _ = self.execute("nc -z localhost {}".format(port))
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return status != 0
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retry(port_is_closed)
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def start_job(self, jobname, user=None):
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return self.systemctl("start {}".format(jobname), user)
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def stop_job(self, jobname, user=None):
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return self.systemctl("stop {}".format(jobname), user)
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def wait_for_job(self, jobname):
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return self.wait_for_unit(jobname)
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def connect(self):
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if self.connected:
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return
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with self.nested("waiting for the VM to finish booting"):
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self.start()
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tic = time.time()
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self.shell.recv(1024)
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# TODO: Timeout
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toc = time.time()
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self.log("connected to guest root shell")
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self.log("(connecting took {:.2f} seconds)".format(toc - tic))
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self.connected = True
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def screenshot(self, filename):
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out_dir = os.environ.get("out", os.getcwd())
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word_pattern = re.compile(r"^\w+$")
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if word_pattern.match(filename):
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filename = os.path.join(out_dir, "{}.png".format(filename))
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tmp = "{}.ppm".format(filename)
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with self.nested(
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"making screenshot {}".format(filename),
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{"image": os.path.basename(filename)},
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):
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self.send_monitor_command("screendump {}".format(tmp))
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ret = subprocess.run("pnmtopng {} > {}".format(tmp, filename), shell=True)
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os.unlink(tmp)
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if ret.returncode != 0:
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raise Exception("Cannot convert screenshot")
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def dump_tty_contents(self, tty):
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"""Debugging: Dump the contents of the TTY<n>
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"""
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self.execute("fold -w 80 /dev/vcs{} | systemd-cat".format(tty))
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def get_screen_text(self):
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if shutil.which("tesseract") is None:
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raise Exception("get_screen_text used but enableOCR is false")
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magick_args = (
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"-filter Catrom -density 72 -resample 300 "
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+ "-contrast -normalize -despeckle -type grayscale "
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+ "-sharpen 1 -posterize 3 -negate -gamma 100 "
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+ "-blur 1x65535"
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)
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tess_args = "-c debug_file=/dev/null --psm 11 --oem 2"
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with self.nested("performing optical character recognition"):
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with tempfile.NamedTemporaryFile() as tmpin:
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self.send_monitor_command("screendump {}".format(tmpin.name))
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cmd = "convert {} {} tiff:- | tesseract - - {}".format(
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magick_args, tmpin.name, tess_args
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)
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ret = subprocess.run(cmd, shell=True, capture_output=True)
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if ret.returncode != 0:
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raise Exception(
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"OCR failed with exit code {}".format(ret.returncode)
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)
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return ret.stdout.decode("utf-8")
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def wait_for_text(self, regex):
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def screen_matches(last):
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text = self.get_screen_text()
|
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m = re.search(regex, text)
|
||
|
||
if last and not m:
|
||
self.log("Last OCR attempt failed. Text was: {}".format(text))
|
||
|
||
return m
|
||
|
||
with self.nested("waiting for {} to appear on screen".format(regex)):
|
||
retry(screen_matches)
|
||
|
||
def send_key(self, key):
|
||
key = CHAR_TO_KEY.get(key, key)
|
||
self.send_monitor_command("sendkey {}".format(key))
|
||
|
||
def start(self):
|
||
if self.booted:
|
||
return
|
||
|
||
self.log("starting vm")
|
||
|
||
def create_socket(path):
|
||
if os.path.exists(path):
|
||
os.unlink(path)
|
||
s = socket.socket(family=socket.AF_UNIX, type=socket.SOCK_STREAM)
|
||
s.bind(path)
|
||
s.listen(1)
|
||
return s
|
||
|
||
monitor_path = os.path.join(self.state_dir, "monitor")
|
||
self.monitor_socket = create_socket(monitor_path)
|
||
|
||
shell_path = os.path.join(self.state_dir, "shell")
|
||
self.shell_socket = create_socket(shell_path)
|
||
|
||
qemu_options = (
|
||
" ".join(
|
||
[
|
||
"" if self.allow_reboot else "-no-reboot",
|
||
"-monitor unix:{}".format(monitor_path),
|
||
"-chardev socket,id=shell,path={}".format(shell_path),
|
||
"-device virtio-serial",
|
||
"-device virtconsole,chardev=shell",
|
||
"-device virtio-rng-pci",
|
||
"-serial stdio" if "DISPLAY" in os.environ else "-nographic",
|
||
]
|
||
)
|
||
+ " "
|
||
+ os.environ.get("QEMU_OPTS", "")
|
||
)
|
||
|
||
environment = {
|
||
"QEMU_OPTS": qemu_options,
|
||
"SHARED_DIR": self.shared_dir,
|
||
"USE_TMPDIR": "1",
|
||
}
|
||
environment.update(dict(os.environ))
|
||
|
||
self.process = subprocess.Popen(
|
||
self.script,
|
||
bufsize=1,
|
||
stdin=subprocess.DEVNULL,
|
||
stdout=subprocess.PIPE,
|
||
stderr=subprocess.STDOUT,
|
||
shell=False,
|
||
cwd=self.state_dir,
|
||
env=environment,
|
||
)
|
||
self.monitor, _ = self.monitor_socket.accept()
|
||
self.shell, _ = self.shell_socket.accept()
|
||
|
||
def process_serial_output():
|
||
for line in self.process.stdout:
|
||
line = line.decode().replace("\r", "").rstrip()
|
||
eprint("{} # {}".format(self.name, line))
|
||
self.logger.enqueue({"msg": line, "machine": self.name})
|
||
|
||
_thread.start_new_thread(process_serial_output, ())
|
||
|
||
self.wait_for_monitor_prompt()
|
||
|
||
self.pid = self.process.pid
|
||
self.booted = True
|
||
|
||
self.log("QEMU running (pid {})".format(self.pid))
|
||
|
||
def shutdown(self):
|
||
if not self.booted:
|
||
return
|
||
|
||
self.shell.send("poweroff\n".encode())
|
||
self.wait_for_shutdown()
|
||
|
||
def crash(self):
|
||
if not self.booted:
|
||
return
|
||
|
||
self.log("forced crash")
|
||
self.send_monitor_command("quit")
|
||
self.wait_for_shutdown()
|
||
|
||
def wait_for_x(self):
|
||
"""Wait until it is possible to connect to the X server. Note that
|
||
testing the existence of /tmp/.X11-unix/X0 is insufficient.
|
||
"""
|
||
with self.nested("waiting for the X11 server"):
|
||
while True:
|
||
cmd = (
|
||
"journalctl -b SYSLOG_IDENTIFIER=systemd | "
|
||
+ 'grep "Reached target Current graphical"'
|
||
)
|
||
status, _ = self.execute(cmd)
|
||
if status != 0:
|
||
continue
|
||
status, _ = self.execute("[ -e /tmp/.X11-unix/X0 ]")
|
||
if status == 0:
|
||
return
|
||
|
||
def sleep(self, secs):
|
||
time.sleep(secs)
|
||
|
||
def forward_port(self, host_port=8080, guest_port=80):
|
||
"""Forward a TCP port on the host to a TCP port on the guest.
|
||
Useful during interactive testing.
|
||
"""
|
||
self.send_monitor_command(
|
||
"hostfwd_add tcp::{}-:{}".format(host_port, guest_port)
|
||
)
|
||
|
||
def block(self):
|
||
"""Make the machine unreachable by shutting down eth1 (the multicast
|
||
interface used to talk to the other VMs). We keep eth0 up so that
|
||
the test driver can continue to talk to the machine.
|
||
"""
|
||
self.send_monitor_command("set_link virtio-net-pci.1 off")
|
||
|
||
def unblock(self):
|
||
"""Make the machine reachable.
|
||
"""
|
||
self.send_monitor_command("set_link virtio-net-pci.1 on")
|
||
|
||
|
||
def create_machine(args):
|
||
global log
|
||
args["log"] = log
|
||
args["redirectSerial"] = os.environ.get("USE_SERIAL", "0") == "1"
|
||
return Machine(args)
|
||
|
||
|
||
def start_all():
|
||
with log.nested("starting all VMs"):
|
||
for machine in machines:
|
||
machine.start()
|
||
|
||
|
||
def join_all():
|
||
with log.nested("waiting for all VMs to finish"):
|
||
for machine in machines:
|
||
machine.wait_for_shutdown()
|
||
|
||
|
||
def test_script():
|
||
exec(os.environ["testScript"])
|
||
|
||
|
||
def run_tests():
|
||
tests = os.environ.get("tests", None)
|
||
if tests is not None:
|
||
with log.nested("running the VM test script"):
|
||
try:
|
||
exec(tests)
|
||
except Exception as e:
|
||
eprint("error: {}".format(str(e)))
|
||
sys.exit(1)
|
||
else:
|
||
ptpython.repl.embed(locals(), globals())
|
||
|
||
# TODO: Collect coverage data
|
||
|
||
for machine in machines:
|
||
if machine.is_up():
|
||
machine.execute("sync")
|
||
|
||
if nr_tests != 0:
|
||
log.log("{} out of {} tests succeeded".format(nr_succeeded, nr_tests))
|
||
|
||
|
||
@contextmanager
|
||
def subtest(name):
|
||
global nr_tests
|
||
global nr_succeeded
|
||
|
||
with log.nested(name):
|
||
nr_tests += 1
|
||
try:
|
||
yield
|
||
nr_succeeded += 1
|
||
return True
|
||
except Exception as e:
|
||
log.log("error: {}".format(str(e)))
|
||
|
||
return False
|
||
|
||
|
||
if __name__ == "__main__":
|
||
global log
|
||
log = Logger()
|
||
|
||
vlan_nrs = list(dict.fromkeys(os.environ["VLANS"].split()))
|
||
vde_sockets = [create_vlan(v) for v in vlan_nrs]
|
||
for nr, vde_socket, _, _ in vde_sockets:
|
||
os.environ["QEMU_VDE_SOCKET_{}".format(nr)] = vde_socket
|
||
|
||
vm_scripts = sys.argv[1:]
|
||
machines = [create_machine({"startCommand": s}) for s in vm_scripts]
|
||
machine_eval = [
|
||
"{0} = machines[{1}]".format(m.name, idx) for idx, m in enumerate(machines)
|
||
]
|
||
exec("\n".join(machine_eval))
|
||
|
||
nr_tests = 0
|
||
nr_succeeded = 0
|
||
|
||
@atexit.register
|
||
def clean_up():
|
||
with log.nested("cleaning up"):
|
||
for machine in machines:
|
||
if machine.pid is None:
|
||
continue
|
||
log.log("killing {} (pid {})".format(machine.name, machine.pid))
|
||
machine.process.kill()
|
||
|
||
for _, _, process, _ in vde_sockets:
|
||
process.kill()
|
||
log.close()
|
||
|
||
tic = time.time()
|
||
run_tests()
|
||
toc = time.time()
|
||
print("test script finished in {:.2f}s".format(toc - tic))
|