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1 | # | |
2 | # VM testing base class | |
3 | # | |
4 | # Copyright 2017-2019 Red Hat Inc. | |
5 | # | |
6 | # Authors: | |
7 | # Fam Zheng <famz@redhat.com> | |
8 | # Gerd Hoffmann <kraxel@redhat.com> | |
9 | # | |
10 | # This code is licensed under the GPL version 2 or later. See | |
11 | # the COPYING file in the top-level directory. | |
12 | # | |
13 | ||
14 | import os | |
15 | import re | |
16 | import sys | |
17 | import socket | |
18 | import logging | |
19 | import time | |
20 | import datetime | |
21 | sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python')) | |
22 | from qemu.accel import kvm_available | |
23 | from qemu.machine import QEMUMachine | |
24 | import subprocess | |
25 | import hashlib | |
26 | import optparse | |
27 | import atexit | |
28 | import tempfile | |
29 | import shutil | |
30 | import multiprocessing | |
31 | import traceback | |
32 | ||
33 | SSH_KEY = open(os.path.join(os.path.dirname(__file__), | |
34 | "..", "keys", "id_rsa")).read() | |
35 | SSH_PUB_KEY = open(os.path.join(os.path.dirname(__file__), | |
36 | "..", "keys", "id_rsa.pub")).read() | |
37 | ||
38 | class BaseVM(object): | |
39 | GUEST_USER = "qemu" | |
40 | GUEST_PASS = "qemupass" | |
41 | ROOT_PASS = "qemupass" | |
42 | ||
43 | envvars = [ | |
44 | "https_proxy", | |
45 | "http_proxy", | |
46 | "ftp_proxy", | |
47 | "no_proxy", | |
48 | ] | |
49 | ||
50 | # The script to run in the guest that builds QEMU | |
51 | BUILD_SCRIPT = "" | |
52 | # The guest name, to be overridden by subclasses | |
53 | name = "#base" | |
54 | # The guest architecture, to be overridden by subclasses | |
55 | arch = "#arch" | |
56 | # command to halt the guest, can be overridden by subclasses | |
57 | poweroff = "poweroff" | |
58 | # enable IPv6 networking | |
59 | ipv6 = True | |
60 | # Scale up some timeouts under TCG. | |
61 | # 4 is arbitrary, but greater than 2, | |
62 | # since we found we need to wait more than twice as long. | |
63 | tcg_ssh_timeout_multiplier = 4 | |
64 | def __init__(self, debug=False, vcpus=None): | |
65 | self._guest = None | |
66 | self._tmpdir = os.path.realpath(tempfile.mkdtemp(prefix="vm-test-", | |
67 | suffix=".tmp", | |
68 | dir=".")) | |
69 | atexit.register(shutil.rmtree, self._tmpdir) | |
70 | ||
71 | self._ssh_key_file = os.path.join(self._tmpdir, "id_rsa") | |
72 | open(self._ssh_key_file, "w").write(SSH_KEY) | |
73 | subprocess.check_call(["chmod", "600", self._ssh_key_file]) | |
74 | ||
75 | self._ssh_pub_key_file = os.path.join(self._tmpdir, "id_rsa.pub") | |
76 | open(self._ssh_pub_key_file, "w").write(SSH_PUB_KEY) | |
77 | ||
78 | self.debug = debug | |
79 | self._stderr = sys.stderr | |
80 | self._devnull = open(os.devnull, "w") | |
81 | if self.debug: | |
82 | self._stdout = sys.stdout | |
83 | else: | |
84 | self._stdout = self._devnull | |
85 | self._args = [ \ | |
86 | "-nodefaults", "-m", "4G", | |
87 | "-cpu", "max", | |
88 | "-netdev", "user,id=vnet,hostfwd=:127.0.0.1:0-:22" + | |
89 | (",ipv6=no" if not self.ipv6 else ""), | |
90 | "-device", "virtio-net-pci,netdev=vnet", | |
91 | "-vnc", "127.0.0.1:0,to=20"] | |
92 | if vcpus and vcpus > 1: | |
93 | self._args += ["-smp", "%d" % vcpus] | |
94 | if kvm_available(self.arch): | |
95 | self._args += ["-enable-kvm"] | |
96 | else: | |
97 | logging.info("KVM not available, not using -enable-kvm") | |
98 | self._data_args = [] | |
99 | ||
100 | def _download_with_cache(self, url, sha256sum=None, sha512sum=None): | |
101 | def check_sha256sum(fname): | |
102 | if not sha256sum: | |
103 | return True | |
104 | checksum = subprocess.check_output(["sha256sum", fname]).split()[0] | |
105 | return sha256sum == checksum.decode("utf-8") | |
106 | ||
107 | def check_sha512sum(fname): | |
108 | if not sha512sum: | |
109 | return True | |
110 | checksum = subprocess.check_output(["sha512sum", fname]).split()[0] | |
111 | return sha512sum == checksum.decode("utf-8") | |
112 | ||
113 | cache_dir = os.path.expanduser("~/.cache/qemu-vm/download") | |
114 | if not os.path.exists(cache_dir): | |
115 | os.makedirs(cache_dir) | |
116 | fname = os.path.join(cache_dir, | |
117 | hashlib.sha1(url.encode("utf-8")).hexdigest()) | |
118 | if os.path.exists(fname) and check_sha256sum(fname) and check_sha512sum(fname): | |
119 | return fname | |
120 | logging.debug("Downloading %s to %s...", url, fname) | |
121 | subprocess.check_call(["wget", "-c", url, "-O", fname + ".download"], | |
122 | stdout=self._stdout, stderr=self._stderr) | |
123 | os.rename(fname + ".download", fname) | |
124 | return fname | |
125 | ||
126 | def _ssh_do(self, user, cmd, check): | |
127 | ssh_cmd = ["ssh", | |
128 | "-t", | |
129 | "-o", "StrictHostKeyChecking=no", | |
130 | "-o", "UserKnownHostsFile=" + os.devnull, | |
131 | "-o", "ConnectTimeout=1", | |
132 | "-p", self.ssh_port, "-i", self._ssh_key_file] | |
133 | # If not in debug mode, set ssh to quiet mode to | |
134 | # avoid printing the results of commands. | |
135 | if not self.debug: | |
136 | ssh_cmd.append("-q") | |
137 | for var in self.envvars: | |
138 | ssh_cmd += ['-o', "SendEnv=%s" % var ] | |
139 | assert not isinstance(cmd, str) | |
140 | ssh_cmd += ["%s@127.0.0.1" % user] + list(cmd) | |
141 | logging.debug("ssh_cmd: %s", " ".join(ssh_cmd)) | |
142 | r = subprocess.call(ssh_cmd) | |
143 | if check and r != 0: | |
144 | raise Exception("SSH command failed: %s" % cmd) | |
145 | return r | |
146 | ||
147 | def ssh(self, *cmd): | |
148 | return self._ssh_do(self.GUEST_USER, cmd, False) | |
149 | ||
150 | def ssh_root(self, *cmd): | |
151 | return self._ssh_do("root", cmd, False) | |
152 | ||
153 | def ssh_check(self, *cmd): | |
154 | self._ssh_do(self.GUEST_USER, cmd, True) | |
155 | ||
156 | def ssh_root_check(self, *cmd): | |
157 | self._ssh_do("root", cmd, True) | |
158 | ||
159 | def build_image(self, img): | |
160 | raise NotImplementedError | |
161 | ||
162 | def exec_qemu_img(self, *args): | |
163 | cmd = [os.environ.get("QEMU_IMG", "qemu-img")] | |
164 | cmd.extend(list(args)) | |
165 | subprocess.check_call(cmd) | |
166 | ||
167 | def add_source_dir(self, src_dir): | |
168 | name = "data-" + hashlib.sha1(src_dir.encode("utf-8")).hexdigest()[:5] | |
169 | tarfile = os.path.join(self._tmpdir, name + ".tar") | |
170 | logging.debug("Creating archive %s for src_dir dir: %s", tarfile, src_dir) | |
171 | subprocess.check_call(["./scripts/archive-source.sh", tarfile], | |
172 | cwd=src_dir, stdin=self._devnull, | |
173 | stdout=self._stdout, stderr=self._stderr) | |
174 | self._data_args += ["-drive", | |
175 | "file=%s,if=none,id=%s,cache=writeback,format=raw" % \ | |
176 | (tarfile, name), | |
177 | "-device", | |
178 | "virtio-blk,drive=%s,serial=%s,bootindex=1" % (name, name)] | |
179 | ||
180 | def boot(self, img, extra_args=[]): | |
181 | args = self._args + [ | |
182 | "-device", "VGA", | |
183 | "-drive", "file=%s,if=none,id=drive0,cache=writeback" % img, | |
184 | "-device", "virtio-blk,drive=drive0,bootindex=0"] | |
185 | args += self._data_args + extra_args | |
186 | logging.debug("QEMU args: %s", " ".join(args)) | |
187 | qemu_bin = os.environ.get("QEMU", "qemu-system-" + self.arch) | |
188 | guest = QEMUMachine(binary=qemu_bin, args=args) | |
189 | guest.set_machine('pc') | |
190 | guest.set_console() | |
191 | try: | |
192 | guest.launch() | |
193 | except: | |
194 | logging.error("Failed to launch QEMU, command line:") | |
195 | logging.error(" ".join([qemu_bin] + args)) | |
196 | logging.error("Log:") | |
197 | logging.error(guest.get_log()) | |
198 | logging.error("QEMU version >= 2.10 is required") | |
199 | raise | |
200 | atexit.register(self.shutdown) | |
201 | self._guest = guest | |
202 | usernet_info = guest.qmp("human-monitor-command", | |
203 | command_line="info usernet") | |
204 | self.ssh_port = None | |
205 | for l in usernet_info["return"].splitlines(): | |
206 | fields = l.split() | |
207 | if "TCP[HOST_FORWARD]" in fields and "22" in fields: | |
208 | self.ssh_port = l.split()[3] | |
209 | if not self.ssh_port: | |
210 | raise Exception("Cannot find ssh port from 'info usernet':\n%s" % \ | |
211 | usernet_info) | |
212 | ||
213 | def console_init(self, timeout = 120): | |
214 | vm = self._guest | |
215 | vm.console_socket.settimeout(timeout) | |
216 | ||
217 | def console_log(self, text): | |
218 | for line in re.split("[\r\n]", text): | |
219 | # filter out terminal escape sequences | |
220 | line = re.sub("\x1b\[[0-9;?]*[a-zA-Z]", "", line) | |
221 | line = re.sub("\x1b\([0-9;?]*[a-zA-Z]", "", line) | |
222 | # replace unprintable chars | |
223 | line = re.sub("\x1b", "<esc>", line) | |
224 | line = re.sub("[\x00-\x1f]", ".", line) | |
225 | line = re.sub("[\x80-\xff]", ".", line) | |
226 | if line == "": | |
227 | continue | |
228 | # log console line | |
229 | sys.stderr.write("con recv: %s\n" % line) | |
230 | ||
231 | def console_wait(self, expect, expectalt = None): | |
232 | vm = self._guest | |
233 | output = "" | |
234 | while True: | |
235 | try: | |
236 | chars = vm.console_socket.recv(1) | |
237 | except socket.timeout: | |
238 | sys.stderr.write("console: *** read timeout ***\n") | |
239 | sys.stderr.write("console: waiting for: '%s'\n" % expect) | |
240 | if not expectalt is None: | |
241 | sys.stderr.write("console: waiting for: '%s' (alt)\n" % expectalt) | |
242 | sys.stderr.write("console: line buffer:\n") | |
243 | sys.stderr.write("\n") | |
244 | self.console_log(output.rstrip()) | |
245 | sys.stderr.write("\n") | |
246 | raise | |
247 | output += chars.decode("latin1") | |
248 | if expect in output: | |
249 | break | |
250 | if not expectalt is None and expectalt in output: | |
251 | break | |
252 | if "\r" in output or "\n" in output: | |
253 | lines = re.split("[\r\n]", output) | |
254 | output = lines.pop() | |
255 | if self.debug: | |
256 | self.console_log("\n".join(lines)) | |
257 | if self.debug: | |
258 | self.console_log(output) | |
259 | if not expectalt is None and expectalt in output: | |
260 | return False | |
261 | return True | |
262 | ||
263 | def console_consume(self): | |
264 | vm = self._guest | |
265 | output = "" | |
266 | vm.console_socket.setblocking(0) | |
267 | while True: | |
268 | try: | |
269 | chars = vm.console_socket.recv(1) | |
270 | except: | |
271 | break | |
272 | output += chars.decode("latin1") | |
273 | if "\r" in output or "\n" in output: | |
274 | lines = re.split("[\r\n]", output) | |
275 | output = lines.pop() | |
276 | if self.debug: | |
277 | self.console_log("\n".join(lines)) | |
278 | if self.debug: | |
279 | self.console_log(output) | |
280 | vm.console_socket.setblocking(1) | |
281 | ||
282 | def console_send(self, command): | |
283 | vm = self._guest | |
284 | if self.debug: | |
285 | logline = re.sub("\n", "<enter>", command) | |
286 | logline = re.sub("[\x00-\x1f]", ".", logline) | |
287 | sys.stderr.write("con send: %s\n" % logline) | |
288 | for char in list(command): | |
289 | vm.console_socket.send(char.encode("utf-8")) | |
290 | time.sleep(0.01) | |
291 | ||
292 | def console_wait_send(self, wait, command): | |
293 | self.console_wait(wait) | |
294 | self.console_send(command) | |
295 | ||
296 | def console_ssh_init(self, prompt, user, pw): | |
297 | sshkey_cmd = "echo '%s' > .ssh/authorized_keys\n" % SSH_PUB_KEY.rstrip() | |
298 | self.console_wait_send("login:", "%s\n" % user) | |
299 | self.console_wait_send("Password:", "%s\n" % pw) | |
300 | self.console_wait_send(prompt, "mkdir .ssh\n") | |
301 | self.console_wait_send(prompt, sshkey_cmd) | |
302 | self.console_wait_send(prompt, "chmod 755 .ssh\n") | |
303 | self.console_wait_send(prompt, "chmod 644 .ssh/authorized_keys\n") | |
304 | ||
305 | def console_sshd_config(self, prompt): | |
306 | self.console_wait(prompt) | |
307 | self.console_send("echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config\n") | |
308 | for var in self.envvars: | |
309 | self.console_wait(prompt) | |
310 | self.console_send("echo 'AcceptEnv %s' >> /etc/ssh/sshd_config\n" % var) | |
311 | ||
312 | def print_step(self, text): | |
313 | sys.stderr.write("### %s ...\n" % text) | |
314 | ||
315 | def wait_ssh(self, wait_root=False, seconds=300): | |
316 | # Allow more time for VM to boot under TCG. | |
317 | if not kvm_available(self.arch): | |
318 | seconds *= self.tcg_ssh_timeout_multiplier | |
319 | starttime = datetime.datetime.now() | |
320 | endtime = starttime + datetime.timedelta(seconds=seconds) | |
321 | guest_up = False | |
322 | while datetime.datetime.now() < endtime: | |
323 | if wait_root and self.ssh_root("exit 0") == 0: | |
324 | guest_up = True | |
325 | break | |
326 | elif self.ssh("exit 0") == 0: | |
327 | guest_up = True | |
328 | break | |
329 | seconds = (endtime - datetime.datetime.now()).total_seconds() | |
330 | logging.debug("%ds before timeout", seconds) | |
331 | time.sleep(1) | |
332 | if not guest_up: | |
333 | raise Exception("Timeout while waiting for guest ssh") | |
334 | ||
335 | def shutdown(self): | |
336 | self._guest.shutdown() | |
337 | ||
338 | def wait(self): | |
339 | self._guest.wait() | |
340 | ||
341 | def graceful_shutdown(self): | |
342 | self.ssh_root(self.poweroff) | |
343 | self._guest.wait() | |
344 | ||
345 | def qmp(self, *args, **kwargs): | |
346 | return self._guest.qmp(*args, **kwargs) | |
347 | ||
348 | def gen_cloud_init_iso(self): | |
349 | cidir = self._tmpdir | |
350 | mdata = open(os.path.join(cidir, "meta-data"), "w") | |
351 | name = self.name.replace(".","-") | |
352 | mdata.writelines(["instance-id: {}-vm-0\n".format(name), | |
353 | "local-hostname: {}-guest\n".format(name)]) | |
354 | mdata.close() | |
355 | udata = open(os.path.join(cidir, "user-data"), "w") | |
356 | print("guest user:pw {}:{}".format(self._config['guest_user'], | |
357 | self._config['guest_pass'])) | |
358 | udata.writelines(["#cloud-config\n", | |
359 | "chpasswd:\n", | |
360 | " list: |\n", | |
361 | " root:%s\n" % self._config['root_pass'], | |
362 | " %s:%s\n" % (self._config['guest_user'], | |
363 | self._config['guest_pass']), | |
364 | " expire: False\n", | |
365 | "users:\n", | |
366 | " - name: %s\n" % self._config['guest_user'], | |
367 | " sudo: ALL=(ALL) NOPASSWD:ALL\n", | |
368 | " ssh-authorized-keys:\n", | |
369 | " - %s\n" % self._config['ssh_pub_key'], | |
370 | " - name: root\n", | |
371 | " ssh-authorized-keys:\n", | |
372 | " - %s\n" % self._config['ssh_pub_key'], | |
373 | "locale: en_US.UTF-8\n"]) | |
374 | proxy = os.environ.get("http_proxy") | |
375 | if not proxy is None: | |
376 | udata.writelines(["apt:\n", | |
377 | " proxy: %s" % proxy]) | |
378 | udata.close() | |
379 | subprocess.check_call(["genisoimage", "-output", "cloud-init.iso", | |
380 | "-volid", "cidata", "-joliet", "-rock", | |
381 | "user-data", "meta-data"], | |
382 | cwd=cidir, | |
383 | stdin=self._devnull, stdout=self._stdout, | |
384 | stderr=self._stdout) | |
385 | ||
386 | return os.path.join(cidir, "cloud-init.iso") | |
387 | ||
388 | def parse_args(vmcls): | |
389 | ||
390 | def get_default_jobs(): | |
391 | if kvm_available(vmcls.arch): | |
392 | return multiprocessing.cpu_count() // 2 | |
393 | else: | |
394 | return 1 | |
395 | ||
396 | parser = optparse.OptionParser( | |
397 | description="VM test utility. Exit codes: " | |
398 | "0 = success, " | |
399 | "1 = command line error, " | |
400 | "2 = environment initialization failed, " | |
401 | "3 = test command failed") | |
402 | parser.add_option("--debug", "-D", action="store_true", | |
403 | help="enable debug output") | |
404 | parser.add_option("--image", "-i", default="%s.img" % vmcls.name, | |
405 | help="image file name") | |
406 | parser.add_option("--force", "-f", action="store_true", | |
407 | help="force build image even if image exists") | |
408 | parser.add_option("--jobs", type=int, default=get_default_jobs(), | |
409 | help="number of virtual CPUs") | |
410 | parser.add_option("--verbose", "-V", action="store_true", | |
411 | help="Pass V=1 to builds within the guest") | |
412 | parser.add_option("--build-image", "-b", action="store_true", | |
413 | help="build image") | |
414 | parser.add_option("--build-qemu", | |
415 | help="build QEMU from source in guest") | |
416 | parser.add_option("--build-target", | |
417 | help="QEMU build target", default="check") | |
418 | parser.add_option("--interactive", "-I", action="store_true", | |
419 | help="Interactively run command") | |
420 | parser.add_option("--snapshot", "-s", action="store_true", | |
421 | help="run tests with a snapshot") | |
422 | parser.disable_interspersed_args() | |
423 | return parser.parse_args() | |
424 | ||
425 | def main(vmcls): | |
426 | try: | |
427 | args, argv = parse_args(vmcls) | |
428 | if not argv and not args.build_qemu and not args.build_image: | |
429 | print("Nothing to do?") | |
430 | return 1 | |
431 | logging.basicConfig(level=(logging.DEBUG if args.debug | |
432 | else logging.WARN)) | |
433 | vm = vmcls(debug=args.debug, vcpus=args.jobs) | |
434 | if args.build_image: | |
435 | if os.path.exists(args.image) and not args.force: | |
436 | sys.stderr.writelines(["Image file exists: %s\n" % args.image, | |
437 | "Use --force option to overwrite\n"]) | |
438 | return 1 | |
439 | return vm.build_image(args.image) | |
440 | if args.build_qemu: | |
441 | vm.add_source_dir(args.build_qemu) | |
442 | cmd = [vm.BUILD_SCRIPT.format( | |
443 | configure_opts = " ".join(argv), | |
444 | jobs=int(args.jobs), | |
445 | target=args.build_target, | |
446 | verbose = "V=1" if args.verbose else "")] | |
447 | else: | |
448 | cmd = argv | |
449 | img = args.image | |
450 | if args.snapshot: | |
451 | img += ",snapshot=on" | |
452 | vm.boot(img) | |
453 | vm.wait_ssh() | |
454 | except Exception as e: | |
455 | if isinstance(e, SystemExit) and e.code == 0: | |
456 | return 0 | |
457 | sys.stderr.write("Failed to prepare guest environment\n") | |
458 | traceback.print_exc() | |
459 | return 2 | |
460 | ||
461 | exitcode = 0 | |
462 | if vm.ssh(*cmd) != 0: | |
463 | exitcode = 3 | |
464 | if args.interactive: | |
465 | vm.ssh() | |
466 | ||
467 | if not args.snapshot: | |
468 | vm.graceful_shutdown() | |
469 | ||
470 | return exitcode |