1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
#!/usr/bin/env python
#
# VM testing base class
#
# Copyright 2017 Red Hat Inc.
#
# Authors:
# Fam Zheng <famz@redhat.com>
#
# This code is licensed under the GPL version 2 or later. See
# the COPYING file in the top-level directory.
#
import os
import sys
import logging
import time
import datetime
sys.path.append(os.path.join(os.path.dirname(__file__), "..", "..", "scripts"))
from qemu import QEMUMachine
import subprocess
import hashlib
import optparse
import atexit
import tempfile
import shutil
import multiprocessing
import traceback
SSH_KEY = open(os.path.join(os.path.dirname(__file__),
"..", "keys", "id_rsa")).read()
SSH_PUB_KEY = open(os.path.join(os.path.dirname(__file__),
"..", "keys", "id_rsa.pub")).read()
class BaseVM(object):
GUEST_USER = "qemu"
GUEST_PASS = "qemupass"
ROOT_PASS = "qemupass"
# The script to run in the guest that builds QEMU
BUILD_SCRIPT = ""
# The guest name, to be overridden by subclasses
name = "#base"
def __init__(self, debug=False, vcpus=None):
self._guest = None
self._tmpdir = os.path.realpath(tempfile.mkdtemp(prefix="vm-test-",
suffix=".tmp",
dir="."))
atexit.register(shutil.rmtree, self._tmpdir)
self._ssh_key_file = os.path.join(self._tmpdir, "id_rsa")
open(self._ssh_key_file, "w").write(SSH_KEY)
subprocess.check_call(["chmod", "600", self._ssh_key_file])
self._ssh_pub_key_file = os.path.join(self._tmpdir, "id_rsa.pub")
open(self._ssh_pub_key_file, "w").write(SSH_PUB_KEY)
self.debug = debug
self._stderr = sys.stderr
self._devnull = open(os.devnull, "w")
if self.debug:
self._stdout = sys.stdout
else:
self._stdout = self._devnull
self._args = [ \
"-nodefaults", "-m", "2G",
"-cpu", "host",
"-netdev", "user,id=vnet,hostfwd=:127.0.0.1:0-:22",
"-device", "virtio-net-pci,netdev=vnet",
"-vnc", "127.0.0.1:0,to=20",
"-serial", "file:%s" % os.path.join(self._tmpdir, "serial.out")]
if vcpus:
self._args += ["-smp", str(vcpus)]
if os.access("/dev/kvm", os.R_OK | os.W_OK):
self._args += ["-enable-kvm"]
else:
logging.info("KVM not available, not using -enable-kvm")
self._data_args = []
def _download_with_cache(self, url, sha256sum=None):
def check_sha256sum(fname):
if not sha256sum:
return True
checksum = subprocess.check_output(["sha256sum", fname]).split()[0]
return sha256sum == checksum
cache_dir = os.path.expanduser("~/.cache/qemu-vm/download")
if not os.path.exists(cache_dir):
os.makedirs(cache_dir)
fname = os.path.join(cache_dir, hashlib.sha1(url).hexdigest())
if os.path.exists(fname) and check_sha256sum(fname):
return fname
logging.debug("Downloading %s to %s...", url, fname)
subprocess.check_call(["wget", "-c", url, "-O", fname + ".download"],
stdout=self._stdout, stderr=self._stderr)
os.rename(fname + ".download", fname)
return fname
def _ssh_do(self, user, cmd, check, interactive=False):
ssh_cmd = ["ssh", "-q",
"-o", "StrictHostKeyChecking=no",
"-o", "UserKnownHostsFile=" + os.devnull,
"-o", "ConnectTimeout=1",
"-p", self.ssh_port, "-i", self._ssh_key_file]
if interactive:
ssh_cmd += ['-t']
assert not isinstance(cmd, str)
ssh_cmd += ["%s@127.0.0.1" % user] + list(cmd)
logging.debug("ssh_cmd: %s", " ".join(ssh_cmd))
r = subprocess.call(ssh_cmd,
stdin=sys.stdin if interactive else self._devnull,
stdout=sys.stdout if interactive else self._stdout,
stderr=sys.stderr if interactive else self._stderr)
if check and r != 0:
raise Exception("SSH command failed: %s" % cmd)
return r
def ssh(self, *cmd):
return self._ssh_do(self.GUEST_USER, cmd, False)
def ssh_interactive(self, *cmd):
return self._ssh_do(self.GUEST_USER, cmd, False, True)
def ssh_root(self, *cmd):
return self._ssh_do("root", cmd, False)
def ssh_check(self, *cmd):
self._ssh_do(self.GUEST_USER, cmd, True)
def ssh_root_check(self, *cmd):
self._ssh_do("root", cmd, True)
def build_image(self, img):
raise NotImplementedError
def add_source_dir(self, src_dir):
name = "data-" + hashlib.sha1(src_dir).hexdigest()[:5]
tarfile = os.path.join(self._tmpdir, name + ".tar")
logging.debug("Creating archive %s for src_dir dir: %s", tarfile, src_dir)
subprocess.check_call(["./scripts/archive-source.sh", tarfile],
cwd=src_dir, stdin=self._devnull,
stdout=self._stdout, stderr=self._stderr)
self._data_args += ["-drive",
"file=%s,if=none,id=%s,cache=writeback,format=raw" % \
(tarfile, name),
"-device",
"virtio-blk,drive=%s,serial=%s,bootindex=1" % (name, name)]
def boot(self, img, extra_args=[]):
args = self._args + [
"-device", "VGA",
"-drive", "file=%s,if=none,id=drive0,cache=writeback" % img,
"-device", "virtio-blk,drive=drive0,bootindex=0"]
args += self._data_args + extra_args
logging.debug("QEMU args: %s", " ".join(args))
qemu_bin = os.environ.get("QEMU", "qemu-system-x86_64")
guest = QEMUMachine(binary=qemu_bin, args=args)
try:
guest.launch()
except:
logging.error("Failed to launch QEMU, command line:")
logging.error(" ".join([qemu_bin] + args))
logging.error("Log:")
logging.error(guest.get_log())
logging.error("QEMU version >= 2.10 is required")
raise
atexit.register(self.shutdown)
self._guest = guest
usernet_info = guest.qmp("human-monitor-command",
command_line="info usernet")
self.ssh_port = None
for l in usernet_info["return"].splitlines():
fields = l.split()
if "TCP[HOST_FORWARD]" in fields and "22" in fields:
self.ssh_port = l.split()[3]
if not self.ssh_port:
raise Exception("Cannot find ssh port from 'info usernet':\n%s" % \
usernet_info)
def wait_ssh(self, seconds=120):
starttime = datetime.datetime.now()
guest_up = False
while (datetime.datetime.now() - starttime).total_seconds() < seconds:
if self.ssh("exit 0") == 0:
guest_up = True
break
time.sleep(1)
if not guest_up:
raise Exception("Timeout while waiting for guest ssh")
def shutdown(self):
self._guest.shutdown()
def wait(self):
self._guest.wait()
def qmp(self, *args, **kwargs):
return self._guest.qmp(*args, **kwargs)
def parse_args(vm_name):
parser = optparse.OptionParser(
description="VM test utility. Exit codes: "
"0 = success, "
"1 = command line error, "
"2 = environment initialization failed, "
"3 = test command failed")
parser.add_option("--debug", "-D", action="store_true",
help="enable debug output")
parser.add_option("--image", "-i", default="%s.img" % vm_name,
help="image file name")
parser.add_option("--force", "-f", action="store_true",
help="force build image even if image exists")
parser.add_option("--jobs", type=int, default=multiprocessing.cpu_count() / 2,
help="number of virtual CPUs")
parser.add_option("--build-image", "-b", action="store_true",
help="build image")
parser.add_option("--build-qemu",
help="build QEMU from source in guest")
parser.add_option("--interactive", "-I", action="store_true",
help="Interactively run command")
parser.disable_interspersed_args()
return parser.parse_args()
def main(vmcls):
try:
args, argv = parse_args(vmcls.name)
if not argv and not args.build_qemu and not args.build_image:
print "Nothing to do?"
return 1
if args.debug:
logging.getLogger().setLevel(logging.DEBUG)
vm = vmcls(debug=args.debug, vcpus=args.jobs)
if args.build_image:
if os.path.exists(args.image) and not args.force:
sys.stderr.writelines(["Image file exists: %s\n" % args.image,
"Use --force option to overwrite\n"])
return 1
return vm.build_image(args.image)
if args.build_qemu:
vm.add_source_dir(args.build_qemu)
cmd = [vm.BUILD_SCRIPT.format(
configure_opts = " ".join(argv),
jobs=args.jobs)]
else:
cmd = argv
vm.boot(args.image + ",snapshot=on")
vm.wait_ssh()
except Exception as e:
if isinstance(e, SystemExit) and e.code == 0:
return 0
sys.stderr.write("Failed to prepare guest environment\n")
traceback.print_exc()
return 2
if args.interactive:
if vm.ssh_interactive(*cmd) == 0:
return 0
vm.ssh_interactive()
return 3
else:
if vm.ssh(*cmd) != 0:
return 3
|
