| # Copyright (c) 2012 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import glob |
| import logging |
| import os |
| import re |
| import urllib2 |
| import urlparse |
| |
| from autotest_lib.client.bin import utils |
| from autotest_lib.client.common_lib import error, global_config |
| from autotest_lib.client.common_lib.cros import dev_server |
| from autotest_lib.server import autotest |
| from autotest_lib.server import utils as server_utils |
| from autotest_lib.server.cros.dynamic_suite import constants as ds_constants |
| from autotest_lib.server.cros.dynamic_suite import tools |
| from chromite.lib import retry_util |
| |
| try: |
| from chromite.lib import metrics |
| except ImportError: |
| metrics = utils.metrics_mock |
| |
| |
| def _metric_name(base_name): |
| return 'chromeos/autotest/provision/' + base_name |
| |
| |
| # Local stateful update path is relative to the CrOS source directory. |
| UPDATER_IDLE = 'UPDATE_STATUS_IDLE' |
| UPDATER_NEED_REBOOT = 'UPDATE_STATUS_UPDATED_NEED_REBOOT' |
| # A list of update engine client states that occur after an update is triggered. |
| UPDATER_PROCESSING_UPDATE = ['UPDATE_STATUS_CHECKING_FORUPDATE', |
| 'UPDATE_STATUS_UPDATE_AVAILABLE', |
| 'UPDATE_STATUS_DOWNLOADING', |
| 'UPDATE_STATUS_FINALIZING'] |
| |
| |
| _STATEFUL_UPDATE_SCRIPT = 'stateful_update' |
| _QUICK_PROVISION_SCRIPT = 'quick-provision' |
| |
| _UPDATER_BIN = '/usr/bin/update_engine_client' |
| _UPDATER_LOGS = ['/var/log/messages', '/var/log/update_engine'] |
| |
| _KERNEL_A = {'name': 'KERN-A', 'kernel': 2, 'root': 3} |
| _KERNEL_B = {'name': 'KERN-B', 'kernel': 4, 'root': 5} |
| |
| # Time to wait for new kernel to be marked successful after |
| # auto update. |
| _KERNEL_UPDATE_TIMEOUT = 120 |
| |
| |
| # PROVISION_FAILED - A flag file to indicate provision failures. The |
| # file is created at the start of any AU procedure (see |
| # `ChromiumOSUpdater._prepare_host()`). The file's location in |
| # stateful means that on successul update it will be removed. Thus, if |
| # this file exists, it indicates that we've tried and failed in a |
| # previous attempt to update. |
| PROVISION_FAILED = '/var/tmp/provision_failed' |
| |
| |
| # A flag file used to enable special handling in lab DUTs. Some |
| # parts of the system in Chromium OS test images will behave in ways |
| # convenient to the test lab when this file is present. Generally, |
| # we create this immediately after any update completes. |
| _LAB_MACHINE_FILE = '/mnt/stateful_partition/.labmachine' |
| |
| |
| # _TARGET_VERSION - A file containing the new version to which we plan |
| # to update. This file is used by the CrOS shutdown code to detect and |
| # handle certain version downgrade cases. Specifically: Downgrading |
| # may trigger an unwanted powerwash in the target build when the |
| # following conditions are met: |
| # * Source build is a v4.4 kernel with R69-10756.0.0 or later. |
| # * Target build predates the R69-10756.0.0 cutoff. |
| # When this file is present and indicates a downgrade, the OS shutdown |
| # code on the DUT knows how to prevent the powerwash. |
| _TARGET_VERSION = '/run/update_target_version' |
| |
| |
| # _REBOOT_FAILURE_MESSAGE - This is the standard message text returned |
| # when the Host.reboot() method fails. The source of this text comes |
| # from `wait_for_restart()` in client/common_lib/hosts/base_classes.py. |
| |
| _REBOOT_FAILURE_MESSAGE = 'Host did not return from reboot' |
| |
| |
| class RootFSUpdateError(error.TestFail): |
| """Raised when the RootFS fails to update.""" |
| |
| |
| class StatefulUpdateError(error.TestFail): |
| """Raised when the stateful partition fails to update.""" |
| |
| |
| class _AttributedUpdateError(error.TestFail): |
| """Update failure with an attributed cause.""" |
| |
| def __init__(self, attribution, msg): |
| super(_AttributedUpdateError, self).__init__( |
| '%s: %s' % (attribution, msg)) |
| self._message = msg |
| |
| def _classify(self): |
| for err_pattern, classification in self._CLASSIFIERS: |
| if re.match(err_pattern, self._message): |
| return classification |
| return None |
| |
| @property |
| def failure_summary(self): |
| """Summarize this error for metrics reporting.""" |
| classification = self._classify() |
| if classification: |
| return '%s: %s' % (self._SUMMARY, classification) |
| else: |
| return self._SUMMARY |
| |
| |
| class HostUpdateError(_AttributedUpdateError): |
| """Failure updating a DUT attributable to the DUT. |
| |
| This class of exception should be raised when the most likely cause |
| of failure was a condition existing on the DUT prior to the update, |
| such as a hardware problem, or a bug in the software on the DUT. |
| """ |
| |
| DUT_DOWN = 'No answer to ssh' |
| |
| _SUMMARY = 'DUT failed prior to update' |
| _CLASSIFIERS = [ |
| (DUT_DOWN, DUT_DOWN), |
| (_REBOOT_FAILURE_MESSAGE, 'Reboot failed'), |
| ] |
| |
| def __init__(self, hostname, msg): |
| super(HostUpdateError, self).__init__( |
| 'Error on %s prior to update' % hostname, msg) |
| |
| |
| class DevServerError(_AttributedUpdateError): |
| """Failure updating a DUT attributable to the devserver. |
| |
| This class of exception should be raised when the most likely cause |
| of failure was the devserver serving the target image for update. |
| """ |
| |
| _SUMMARY = 'Devserver failed prior to update' |
| _CLASSIFIERS = [] |
| |
| def __init__(self, devserver, msg): |
| super(DevServerError, self).__init__( |
| 'Devserver error on %s' % devserver, msg) |
| |
| |
| class ImageInstallError(_AttributedUpdateError): |
| """Failure updating a DUT when installing from the devserver. |
| |
| This class of exception should be raised when the target DUT fails |
| to download and install the target image from the devserver, and |
| either the devserver or the DUT might be at fault. |
| """ |
| |
| _SUMMARY = 'Image failed to download and install' |
| _CLASSIFIERS = [] |
| |
| def __init__(self, hostname, devserver, msg): |
| super(ImageInstallError, self).__init__( |
| 'Download and install failed from %s onto %s' |
| % (devserver, hostname), msg) |
| |
| |
| class NewBuildUpdateError(_AttributedUpdateError): |
| """Failure updating a DUT attributable to the target build. |
| |
| This class of exception should be raised when updating to a new |
| build fails, and the most likely cause of the failure is a bug in |
| the newly installed target build. |
| """ |
| |
| CHROME_FAILURE = 'Chrome failed to reach login screen' |
| UPDATE_ENGINE_FAILURE = ('update-engine failed to call ' |
| 'chromeos-setgoodkernel') |
| ROLLBACK_FAILURE = 'System rolled back to previous build' |
| |
| _SUMMARY = 'New build failed' |
| _CLASSIFIERS = [ |
| (CHROME_FAILURE, 'Chrome did not start'), |
| (UPDATE_ENGINE_FAILURE, 'update-engine did not start'), |
| (ROLLBACK_FAILURE, ROLLBACK_FAILURE), |
| ] |
| |
| def __init__(self, update_version, msg): |
| super(NewBuildUpdateError, self).__init__( |
| 'Failure in build %s' % update_version, msg) |
| |
| @property |
| def failure_summary(self): |
| #pylint: disable=missing-docstring |
| return 'Build failed to work after installing' |
| |
| |
| def _url_to_version(update_url): |
| """Return the version based on update_url. |
| |
| @param update_url: url to the image to update to. |
| |
| """ |
| # The Chrome OS version is generally the last element in the URL. The only |
| # exception is delta update URLs, which are rooted under the version; e.g., |
| # http://.../update/.../0.14.755.0/au/0.14.754.0. In this case we want to |
| # strip off the au section of the path before reading the version. |
| return re.sub('/au/.*', '', |
| urlparse.urlparse(update_url).path).split('/')[-1].strip() |
| |
| |
| def url_to_image_name(update_url): |
| """Return the image name based on update_url. |
| |
| From a URL like: |
| http://172.22.50.205:8082/update/lumpy-release/R27-3837.0.0 |
| return lumpy-release/R27-3837.0.0 |
| |
| @param update_url: url to the image to update to. |
| @returns a string representing the image name in the update_url. |
| |
| """ |
| return '/'.join(urlparse.urlparse(update_url).path.split('/')[-2:]) |
| |
| |
| def get_update_failure_reason(exception): |
| """Convert an exception into a failure reason for metrics. |
| |
| The passed in `exception` should be one raised by failure of |
| `ChromiumOSUpdater.run_update`. The returned string will describe |
| the failure. If the input exception value is not a truish value |
| the return value will be `None`. |
| |
| The number of possible return strings is restricted to a limited |
| enumeration of values so that the string may be safely used in |
| Monarch metrics without worrying about cardinality of the range of |
| string values. |
| |
| @param exception Exception to be converted to a failure reason. |
| |
| @return A string suitable for use in Monarch metrics, or `None`. |
| """ |
| if exception: |
| if isinstance(exception, _AttributedUpdateError): |
| return exception.failure_summary |
| else: |
| return 'Unknown Error: %s' % type(exception).__name__ |
| return None |
| |
| |
| def _get_devserver_build_from_update_url(update_url): |
| """Get the devserver and build from the update url. |
| |
| @param update_url: The url for update. |
| Eg: http://devserver:port/update/build. |
| |
| @return: A tuple of (devserver url, build) or None if the update_url |
| doesn't match the expected pattern. |
| |
| @raises ValueError: If the update_url doesn't match the expected pattern. |
| @raises ValueError: If no global_config was found, or it doesn't contain an |
| image_url_pattern. |
| """ |
| pattern = global_config.global_config.get_config_value( |
| 'CROS', 'image_url_pattern', type=str, default='') |
| if not pattern: |
| raise ValueError('Cannot parse update_url, the global config needs ' |
| 'an image_url_pattern.') |
| re_pattern = pattern.replace('%s', '(\S+)') |
| parts = re.search(re_pattern, update_url) |
| if not parts or len(parts.groups()) < 2: |
| raise ValueError('%s is not an update url' % update_url) |
| return parts.groups() |
| |
| |
| def _list_image_dir_contents(update_url): |
| """Lists the contents of the devserver for a given build/update_url. |
| |
| @param update_url: An update url. Eg: http://devserver:port/update/build. |
| """ |
| if not update_url: |
| logging.warning('Need update_url to list contents of the devserver.') |
| return |
| error_msg = 'Cannot check contents of devserver, update url %s' % update_url |
| try: |
| devserver_url, build = _get_devserver_build_from_update_url(update_url) |
| except ValueError as e: |
| logging.warning('%s: %s', error_msg, e) |
| return |
| devserver = dev_server.ImageServer(devserver_url) |
| try: |
| devserver.list_image_dir(build) |
| # The devserver will retry on URLError to avoid flaky connections, but will |
| # eventually raise the URLError if it persists. All HTTPErrors get |
| # converted to DevServerExceptions. |
| except (dev_server.DevServerException, urllib2.URLError) as e: |
| logging.warning('%s: %s', error_msg, e) |
| |
| |
| def _get_metric_fields(update_url): |
| """Return a dict of metric fields. |
| |
| This is used for sending autoupdate metrics for the given update URL. |
| |
| @param update_url Metrics fields will be calculated from this URL. |
| """ |
| build_name = url_to_image_name(update_url) |
| try: |
| board, build_type, milestone, _ = server_utils.ParseBuildName( |
| build_name) |
| except server_utils.ParseBuildNameException: |
| logging.warning('Unable to parse build name %s for metrics. ' |
| 'Continuing anyway.', build_name) |
| board, build_type, milestone = ('', '', '') |
| return { |
| 'dev_server': dev_server.get_resolved_hostname(update_url), |
| 'board': board, |
| 'build_type': build_type, |
| 'milestone': milestone, |
| } |
| |
| |
| # TODO(garnold) This implements shared updater functionality needed for |
| # supporting the autoupdate_EndToEnd server-side test. We should probably |
| # migrate more of the existing ChromiumOSUpdater functionality to it as we |
| # expand non-CrOS support in other tests. |
| class ChromiumOSUpdater(object): |
| """Chromium OS specific DUT update functionality.""" |
| |
| def __init__(self, update_url, host=None, interactive=True, |
| use_quick_provision=False): |
| """Initializes the object. |
| |
| @param update_url: The URL we want the update to use. |
| @param host: A client.common_lib.hosts.Host implementation. |
| @param interactive: Bool whether we are doing an interactive update. |
| @param use_quick_provision: Whether we should attempt to perform |
| the update using the quick-provision script. |
| """ |
| self.update_url = update_url |
| self.host = host |
| self.interactive = interactive |
| self.update_version = _url_to_version(update_url) |
| self._use_quick_provision = use_quick_provision |
| |
| |
| def _run(self, cmd, *args, **kwargs): |
| """Abbreviated form of self.host.run(...)""" |
| return self.host.run(cmd, *args, **kwargs) |
| |
| |
| def check_update_status(self): |
| """Returns the current update engine state. |
| |
| We use the `update_engine_client -status' command and parse the line |
| indicating the update state, e.g. "CURRENT_OP=UPDATE_STATUS_IDLE". |
| """ |
| update_status = self.host.run(command='%s -status | grep CURRENT_OP' % |
| _UPDATER_BIN) |
| return update_status.stdout.strip().split('=')[-1] |
| |
| |
| def _rootdev(self, options=''): |
| """Returns the stripped output of rootdev <options>. |
| |
| @param options: options to run rootdev. |
| |
| """ |
| return self._run('rootdev %s' % options).stdout.strip() |
| |
| |
| def get_kernel_state(self): |
| """Returns the (<active>, <inactive>) kernel state as a pair. |
| |
| @raise RootFSUpdateError if the DUT reports a root partition |
| number that isn't one of the known valid values. |
| """ |
| active_root = int(re.findall('\d+\Z', self._rootdev('-s'))[0]) |
| if active_root == _KERNEL_A['root']: |
| return _KERNEL_A, _KERNEL_B |
| elif active_root == _KERNEL_B['root']: |
| return _KERNEL_B, _KERNEL_A |
| else: |
| raise RootFSUpdateError( |
| 'Encountered unknown root partition: %s' % active_root) |
| |
| |
| def _cgpt(self, flag, kernel): |
| """Return numeric cgpt value for the specified flag, kernel, device.""" |
| return int(self._run('cgpt show -n -i %d %s $(rootdev -s -d)' % ( |
| kernel['kernel'], flag)).stdout.strip()) |
| |
| |
| def _get_next_kernel(self): |
| """Return the kernel that has priority for the next boot.""" |
| priority_a = self._cgpt('-P', _KERNEL_A) |
| priority_b = self._cgpt('-P', _KERNEL_B) |
| if priority_a > priority_b: |
| return _KERNEL_A |
| else: |
| return _KERNEL_B |
| |
| |
| def _get_kernel_success(self, kernel): |
| """Return boolean success flag for the specified kernel. |
| |
| @param kernel: information of the given kernel, either _KERNEL_A |
| or _KERNEL_B. |
| """ |
| return self._cgpt('-S', kernel) != 0 |
| |
| |
| def _get_kernel_tries(self, kernel): |
| """Return tries count for the specified kernel. |
| |
| @param kernel: information of the given kernel, either _KERNEL_A |
| or _KERNEL_B. |
| """ |
| return self._cgpt('-T', kernel) |
| |
| |
| def _get_last_update_error(self): |
| """Get the last autoupdate error code.""" |
| command_result = self._run( |
| '%s --last_attempt_error' % _UPDATER_BIN) |
| return command_result.stdout.strip().replace('\n', ', ') |
| |
| |
| def _base_update_handler_no_retry(self, run_args): |
| """Base function to handle a remote update ssh call. |
| |
| @param run_args: Dictionary of args passed to ssh_host.run function. |
| |
| @throws: intercepts and re-throws all exceptions |
| """ |
| try: |
| self.host.run(**run_args) |
| except Exception as e: |
| logging.debug('exception in update handler: %s', e) |
| raise e |
| |
| |
| def _base_update_handler(self, run_args, err_msg_prefix=None): |
| """Handle a remote update ssh call, possibly with retries. |
| |
| @param run_args: Dictionary of args passed to ssh_host.run function. |
| @param err_msg_prefix: Prefix of the exception error message. |
| """ |
| def exception_handler(e): |
| """Examines exceptions and returns True if the update handler |
| should be retried. |
| |
| @param e: the exception intercepted by the retry util. |
| """ |
| return (isinstance(e, error.AutoservSSHTimeout) or |
| (isinstance(e, error.GenericHostRunError) and |
| hasattr(e, 'description') and |
| (re.search('ERROR_CODE=37', e.description) or |
| re.search('generic error .255.', e.description)))) |
| |
| try: |
| # Try the update twice (arg 2 is max_retry, not including the first |
| # call). Some exceptions may be caught by the retry handler. |
| retry_util.GenericRetry(exception_handler, 1, |
| self._base_update_handler_no_retry, |
| run_args) |
| except Exception as e: |
| message = err_msg_prefix + ': ' + str(e) |
| raise RootFSUpdateError(message) |
| |
| |
| def _wait_for_update_service(self): |
| """Ensure that the update engine daemon is running, possibly |
| by waiting for it a bit in case the DUT just rebooted and the |
| service hasn't started yet. |
| """ |
| def handler(e): |
| """Retry exception handler. |
| |
| Assumes that the error is due to the update service not having |
| started yet. |
| |
| @param e: the exception intercepted by the retry util. |
| """ |
| if isinstance(e, error.AutoservRunError): |
| logging.debug('update service check exception: %s\n' |
| 'retrying...', e) |
| return True |
| else: |
| return False |
| |
| # Retry at most three times, every 5s. |
| status = retry_util.GenericRetry(handler, 3, |
| self.check_update_status, |
| sleep=5) |
| |
| # Expect the update engine to be idle. |
| if status != UPDATER_IDLE: |
| raise RootFSUpdateError( |
| 'Update engine status is %s (%s was expected).' |
| % (status, UPDATER_IDLE)) |
| |
| |
| def _reset_update_engine(self): |
| """Resets the host to prepare for a clean update regardless of state.""" |
| self._run('stop ui || true') |
| self._run('stop update-engine || true') |
| self._run('start update-engine') |
| self._wait_for_update_service() |
| |
| |
| def _reset_stateful_partition(self): |
| """Clear any pending stateful update request.""" |
| self._run('%s --stateful_change=reset 2>&1' |
| % self._get_stateful_update_script()) |
| self._run('rm -f %s' % _TARGET_VERSION) |
| |
| |
| def _set_target_version(self): |
| """Set the "target version" for the update.""" |
| version_number = self.update_version.split('-')[1] |
| self._run('echo %s > %s' % (version_number, _TARGET_VERSION)) |
| |
| |
| def _revert_boot_partition(self): |
| """Revert the boot partition.""" |
| part = self._rootdev('-s') |
| logging.warning('Reverting update; Boot partition will be %s', part) |
| return self._run('/postinst %s 2>&1' % part) |
| |
| |
| def _verify_kernel_state(self): |
| """Verify that the next kernel to boot is correct for update. |
| |
| This tests that the kernel state is correct for a successfully |
| downloaded and installed update. That is, the next kernel to |
| boot must be the currently inactive kernel. |
| |
| @raise RootFSUpdateError if the DUT next kernel isn't the |
| expected next kernel. |
| """ |
| inactive_kernel = self.get_kernel_state()[1] |
| next_kernel = self._get_next_kernel() |
| if next_kernel != inactive_kernel: |
| raise RootFSUpdateError( |
| 'Update failed. The kernel for next boot is %s, ' |
| 'but %s was expected.' |
| % (next_kernel['name'], inactive_kernel['name'])) |
| return inactive_kernel |
| |
| |
| def _verify_update_completed(self): |
| """Verifies that an update has completed. |
| |
| @raise RootFSUpdateError if the DUT doesn't indicate that |
| download is complete and the DUT is ready for reboot. |
| """ |
| status = self.check_update_status() |
| if status != UPDATER_NEED_REBOOT: |
| error_msg = '' |
| if status == UPDATER_IDLE: |
| error_msg = 'Update error: %s' % self._get_last_update_error() |
| raise RootFSUpdateError( |
| 'Update engine status is %s (%s was expected). %s' |
| % (status, UPDATER_NEED_REBOOT, error_msg)) |
| return self._verify_kernel_state() |
| |
| |
| def trigger_update(self): |
| """Triggers a background update.""" |
| # If this function is called immediately after reboot (which it |
| # can be), there is no guarantee that the update engine is up |
| # and running yet, so wait for it. |
| self._wait_for_update_service() |
| |
| autoupdate_cmd = ('%s --check_for_update --omaha_url=%s' % |
| (_UPDATER_BIN, self.update_url)) |
| run_args = {'command': autoupdate_cmd} |
| err_prefix = 'Failed to trigger an update on %s. ' % self.host.hostname |
| logging.info('Triggering update via: %s', autoupdate_cmd) |
| metric_fields = {'success': False} |
| try: |
| self._base_update_handler(run_args, err_prefix) |
| metric_fields['success'] = True |
| finally: |
| c = metrics.Counter('chromeos/autotest/autoupdater/trigger') |
| metric_fields.update(_get_metric_fields(self.update_url)) |
| c.increment(fields=metric_fields) |
| |
| |
| def update_image(self): |
| """Updates the device root FS and kernel and verifies success.""" |
| autoupdate_cmd = ('%s --update --omaha_url=%s' % |
| (_UPDATER_BIN, self.update_url)) |
| if not self.interactive: |
| autoupdate_cmd = '%s --interactive=false' % autoupdate_cmd |
| run_args = {'command': autoupdate_cmd, 'timeout': 3600} |
| err_prefix = ('Failed to install device image using payload at %s ' |
| 'on %s. ' % (self.update_url, self.host.hostname)) |
| logging.info('Updating image via: %s', autoupdate_cmd) |
| metric_fields = {'success': False} |
| try: |
| self._base_update_handler(run_args, err_prefix) |
| metric_fields['success'] = True |
| finally: |
| c = metrics.Counter('chromeos/autotest/autoupdater/update') |
| metric_fields.update(_get_metric_fields(self.update_url)) |
| c.increment(fields=metric_fields) |
| return self._verify_update_completed() |
| |
| |
| def _get_remote_script(self, script_name): |
| """Ensure that `script_name` is present on the DUT. |
| |
| The given script (e.g. `stateful_update`) may be present in the |
| stateful partition under /usr/local/bin, or we may have to |
| download it from the devserver. |
| |
| Determine whether the script is present or must be downloaded |
| and download if necessary. Then, return a command fragment |
| sufficient to run the script from whereever it now lives on the |
| DUT. |
| |
| @param script_name The name of the script as expected in |
| /usr/local/bin and on the devserver. |
| @return A string with the command (minus arguments) that will |
| run the target script. |
| """ |
| remote_script = '/usr/local/bin/%s' % script_name |
| if self.host.path_exists(remote_script): |
| return remote_script |
| remote_tmp_script = '/tmp/%s' % script_name |
| server_name = urlparse.urlparse(self.update_url)[1] |
| script_url = 'http://%s/static/%s' % (server_name, script_name) |
| fetch_script = ( |
| 'curl -o %s %s && head -1 %s | grep "^#!" | sed "s/#!//"') % ( |
| remote_tmp_script, script_url, remote_tmp_script) |
| script_interpreter = self._run(fetch_script, |
| ignore_status=True).stdout.strip() |
| if not script_interpreter: |
| return None |
| return '%s %s' % (script_interpreter, remote_tmp_script) |
| |
| |
| def _get_stateful_update_script(self): |
| """Returns a command to run the stateful update script. |
| |
| Find `stateful_update` on the target or install it, as |
| necessary. If installation fails, raise an exception. |
| |
| @raise StatefulUpdateError if the script can't be found or |
| installed. |
| @return A string that can be joined with arguments to run the |
| `stateful_update` command on the DUT. |
| """ |
| script_command = self._get_remote_script(_STATEFUL_UPDATE_SCRIPT) |
| if not script_command: |
| raise StatefulUpdateError('Could not install %s on DUT' |
| % _STATEFUL_UPDATE_SCRIPT) |
| return script_command |
| |
| |
| def rollback_rootfs(self, powerwash): |
| """Triggers rollback and waits for it to complete. |
| |
| @param powerwash: If true, powerwash as part of rollback. |
| |
| @raise RootFSUpdateError if anything went wrong. |
| """ |
| version = self.host.get_release_version() |
| # Introduced can_rollback in M36 (build 5772). # etc/lsb-release matches |
| # X.Y.Z. This version split just pulls the first part out. |
| try: |
| build_number = int(version.split('.')[0]) |
| except ValueError: |
| logging.error('Could not parse build number.') |
| build_number = 0 |
| |
| if build_number >= 5772: |
| can_rollback_cmd = '%s --can_rollback' % _UPDATER_BIN |
| logging.info('Checking for rollback.') |
| try: |
| self._run(can_rollback_cmd) |
| except error.AutoservRunError as e: |
| raise RootFSUpdateError("Rollback isn't possible on %s: %s" % |
| (self.host.hostname, str(e))) |
| |
| rollback_cmd = '%s --rollback --follow' % _UPDATER_BIN |
| if not powerwash: |
| rollback_cmd += ' --nopowerwash' |
| |
| logging.info('Performing rollback.') |
| try: |
| self._run(rollback_cmd) |
| except error.AutoservRunError as e: |
| raise RootFSUpdateError('Rollback failed on %s: %s' % |
| (self.host.hostname, str(e))) |
| |
| self._verify_update_completed() |
| |
| |
| def update_stateful(self, clobber=True): |
| """Updates the stateful partition. |
| |
| @param clobber: If True, a clean stateful installation. |
| |
| @raise StatefulUpdateError if the update script fails to |
| complete successfully. |
| """ |
| logging.info('Updating stateful partition...') |
| statefuldev_url = self.update_url.replace('update', 'static') |
| |
| # Attempt stateful partition update; this must succeed so that the newly |
| # installed host is testable after update. |
| statefuldev_cmd = [self._get_stateful_update_script(), statefuldev_url] |
| if clobber: |
| statefuldev_cmd.append('--stateful_change=clean') |
| |
| statefuldev_cmd.append('2>&1') |
| try: |
| self._run(' '.join(statefuldev_cmd), timeout=1200) |
| except error.AutoservRunError: |
| raise StatefulUpdateError( |
| 'Failed to perform stateful update on %s' % |
| self.host.hostname) |
| |
| |
| def verify_boot_expectations(self, expected_kernel, rollback_message): |
| """Verifies that we fully booted given expected kernel state. |
| |
| This method both verifies that we booted using the correct kernel |
| state and that the OS has marked the kernel as good. |
| |
| @param expected_kernel: kernel that we are verifying with, |
| i.e. I expect to be booted onto partition 4 etc. See output of |
| get_kernel_state. |
| @param rollback_message: string include in except message text |
| if we booted with the wrong partition. |
| |
| @raise NewBuildUpdateError if any of the various checks fail. |
| """ |
| # Figure out the newly active kernel. |
| active_kernel = self.get_kernel_state()[0] |
| |
| # Check for rollback due to a bad build. |
| if active_kernel != expected_kernel: |
| |
| # Kernel crash reports should be wiped between test runs, but |
| # may persist from earlier parts of the test, or from problems |
| # with provisioning. |
| # |
| # Kernel crash reports will NOT be present if the crash happened |
| # before encrypted stateful is mounted. |
| # |
| # TODO(dgarrett): Integrate with server/crashcollect.py at some |
| # point. |
| kernel_crashes = glob.glob('/var/spool/crash/kernel.*.kcrash') |
| if kernel_crashes: |
| rollback_message += ': kernel_crash' |
| logging.debug('Found %d kernel crash reports:', |
| len(kernel_crashes)) |
| # The crash names contain timestamps that may be useful: |
| # kernel.20131207.005945.0.kcrash |
| for crash in kernel_crashes: |
| logging.debug(' %s', os.path.basename(crash)) |
| |
| # Print out some information to make it easier to debug |
| # the rollback. |
| logging.debug('Dumping partition table.') |
| self._run('cgpt show $(rootdev -s -d)') |
| logging.debug('Dumping crossystem for firmware debugging.') |
| self._run('crossystem --all') |
| raise NewBuildUpdateError(self.update_version, rollback_message) |
| |
| # Make sure chromeos-setgoodkernel runs. |
| try: |
| utils.poll_for_condition( |
| lambda: (self._get_kernel_tries(active_kernel) == 0 |
| and self._get_kernel_success(active_kernel)), |
| exception=RootFSUpdateError(), |
| timeout=_KERNEL_UPDATE_TIMEOUT, sleep_interval=5) |
| except RootFSUpdateError: |
| services_status = self._run('status system-services').stdout |
| if services_status != 'system-services start/running\n': |
| event = NewBuildUpdateError.CHROME_FAILURE |
| else: |
| event = NewBuildUpdateError.UPDATE_ENGINE_FAILURE |
| raise NewBuildUpdateError(self.update_version, event) |
| |
| |
| def _prepare_host(self): |
| """Make sure the target DUT is working and ready for update. |
| |
| Initially, the target DUT's state is unknown. The DUT is |
| expected to be online, but we strive to be forgiving if Chrome |
| and/or the update engine aren't fully functional. |
| """ |
| # Summary of work, and the rationale: |
| # 1. Reboot, because it's a good way to clear out problems. |
| # 2. Touch the PROVISION_FAILED file, to allow repair to detect |
| # failure later. |
| # 3. Run the hook for host class specific preparation. |
| # 4. Stop Chrome, because the system is designed to eventually |
| # reboot if Chrome is stuck in a crash loop. |
| # 5. Force `update-engine` to start, because if Chrome failed |
| # to start properly, the status of the `update-engine` job |
| # will be uncertain. |
| if not self.host.is_up(): |
| raise HostUpdateError(self.host.hostname, |
| HostUpdateError.DUT_DOWN) |
| self._reset_stateful_partition() |
| self.host.reboot(timeout=self.host.REBOOT_TIMEOUT) |
| self._run('touch %s' % PROVISION_FAILED) |
| self.host.prepare_for_update() |
| self._reset_update_engine() |
| logging.info('Updating from version %s to %s.', |
| self.host.get_release_version(), |
| self.update_version) |
| |
| |
| def _verify_devserver(self): |
| """Check that our chosen devserver is still working. |
| |
| @raise DevServerError if the devserver fails any sanity check. |
| """ |
| server = 'http://%s' % urlparse.urlparse(self.update_url)[1] |
| try: |
| if not dev_server.ImageServer.devserver_healthy(server): |
| raise DevServerError( |
| server, 'Devserver is not healthy') |
| except Exception as e: |
| raise DevServerError( |
| server, 'Devserver is not up and available') |
| |
| |
| def _install_via_update_engine(self): |
| """Install an updating using the production AU flow. |
| |
| This uses the standard AU flow and the `stateful_update` script |
| to download and install a root FS, kernel and stateful |
| filesystem content. |
| |
| @return The kernel expected to be booted next. |
| """ |
| logging.info('Installing image using update_engine.') |
| expected_kernel = self.update_image() |
| self.update_stateful() |
| self._set_target_version() |
| return expected_kernel |
| |
| |
| def _install_via_quick_provision(self): |
| """Install an updating using the `quick-provision` script. |
| |
| This uses the `quick-provision` script to download and install |
| a root FS, kernel and stateful filesystem content. |
| |
| @return The kernel expected to be booted next. |
| """ |
| if not self._use_quick_provision: |
| return None |
| build_re = global_config.global_config.get_config_value( |
| 'CROS', 'quick_provision_build_regex', type=str, default='') |
| image_name = url_to_image_name(self.update_url) |
| if not build_re or re.match(build_re, image_name) is None: |
| logging.info('Not eligible for quick-provision.') |
| return None |
| logging.info('Installing image using quick-provision.') |
| provision_command = self._get_remote_script(_QUICK_PROVISION_SCRIPT) |
| server_name = urlparse.urlparse(self.update_url)[1] |
| static_url = 'http://%s/static' % server_name |
| command = '%s --noreboot %s %s' % ( |
| provision_command, image_name, static_url) |
| try: |
| self._run(command) |
| self._set_target_version() |
| return self._verify_kernel_state() |
| except Exception: |
| # N.B. We handle only `Exception` here. Non-Exception |
| # classes (such as KeyboardInterrupt) are handled by our |
| # caller. |
| logging.exception('quick-provision script failed; ' |
| 'will fall back to update_engine.') |
| self._revert_boot_partition() |
| self._reset_stateful_partition() |
| self._reset_update_engine() |
| return None |
| |
| |
| def _install_update(self): |
| """Install the requested image on the DUT, but don't start it. |
| |
| This downloads and installs a root FS, kernel and stateful |
| filesystem content. This does not reboot the DUT, so the update |
| is merely pending when the method returns. |
| |
| @return The kernel expected to be booted next. |
| """ |
| logging.info('Installing image at %s onto %s', |
| self.update_url, self.host.hostname) |
| try: |
| return (self._install_via_quick_provision() |
| or self._install_via_update_engine()) |
| except: |
| # N.B. This handling code includes non-Exception classes such |
| # as KeyboardInterrupt. We need to clean up, but we also must |
| # re-raise. |
| self._revert_boot_partition() |
| self._reset_stateful_partition() |
| self._reset_update_engine() |
| # Collect update engine logs in the event of failure. |
| if self.host.job: |
| logging.info('Collecting update engine logs due to failure...') |
| self.host.get_file( |
| _UPDATER_LOGS, self.host.job.sysinfo.sysinfodir, |
| preserve_perm=False) |
| _list_image_dir_contents(self.update_url) |
| raise |
| |
| |
| def _complete_update(self, expected_kernel): |
| """Finish the update, and confirm that it succeeded. |
| |
| Initial condition is that the target build has been downloaded |
| and installed on the DUT, but has not yet been booted. This |
| function is responsible for rebooting the DUT, and checking that |
| the new build is running successfully. |
| |
| @param expected_kernel: kernel expected to be active after reboot. |
| """ |
| # Regarding the 'crossystem' command below: In some cases, |
| # the update flow puts the TPM into a state such that it |
| # fails verification. We don't know why. However, this |
| # call papers over the problem by clearing the TPM during |
| # the reboot. |
| # |
| # We ignore failures from 'crossystem'. Although failure |
| # here is unexpected, and could signal a bug, the point of |
| # the exercise is to paper over problems; allowing this to |
| # fail would defeat the purpose. |
| self._run('crossystem clear_tpm_owner_request=1', |
| ignore_status=True) |
| self.host.reboot(timeout=self.host.REBOOT_TIMEOUT) |
| |
| # Touch the lab machine file to leave a marker that |
| # distinguishes this image from other test images. |
| # Afterwards, we must re-run the autoreboot script because |
| # it depends on the _LAB_MACHINE_FILE. |
| autoreboot_cmd = ('FILE="%s" ; [ -f "$FILE" ] || ' |
| '( touch "$FILE" ; start autoreboot )') |
| self._run(autoreboot_cmd % _LAB_MACHINE_FILE) |
| self.verify_boot_expectations( |
| expected_kernel, NewBuildUpdateError.ROLLBACK_FAILURE) |
| |
| logging.debug('Cleaning up old autotest directories.') |
| try: |
| installed_autodir = autotest.Autotest.get_installed_autodir( |
| self.host) |
| self._run('rm -rf ' + installed_autodir) |
| except autotest.AutodirNotFoundError: |
| logging.debug('No autotest installed directory found.') |
| |
| |
| def run_update(self): |
| """Perform a full update of a DUT in the test lab. |
| |
| This downloads and installs the root FS and stateful partition |
| content needed for the update specified in `self.host` and |
| `self.update_url`. The update is performed according to the |
| requirements for provisioning a DUT for testing the requested |
| build. |
| |
| At the end of the procedure, metrics are reported describing the |
| outcome of the operation. |
| |
| @returns A tuple of the form `(image_name, attributes)`, where |
| `image_name` is the name of the image installed, and |
| `attributes` is new attributes to be applied to the DUT. |
| """ |
| server_name = dev_server.get_resolved_hostname(self.update_url) |
| metrics.Counter(_metric_name('install')).increment( |
| fields={'devserver': server_name}) |
| |
| self._verify_devserver() |
| |
| try: |
| self._prepare_host() |
| except _AttributedUpdateError: |
| raise |
| except Exception as e: |
| logging.exception('Failure preparing host prior to update.') |
| raise HostUpdateError(self.host.hostname, str(e)) |
| |
| try: |
| expected_kernel = self._install_update() |
| except _AttributedUpdateError: |
| raise |
| except Exception as e: |
| logging.exception('Failure during download and install.') |
| server_name = dev_server.get_resolved_hostname(self.update_url) |
| raise ImageInstallError(self.host.hostname, server_name, str(e)) |
| |
| try: |
| self._complete_update(expected_kernel) |
| except _AttributedUpdateError: |
| raise |
| except Exception as e: |
| logging.exception('Failure from build after update.') |
| raise NewBuildUpdateError(self.update_version, str(e)) |
| |
| image_name = url_to_image_name(self.update_url) |
| # update_url is different from devserver url needed to stage autotest |
| # packages, therefore, resolve a new devserver url here. |
| devserver_url = dev_server.ImageServer.resolve( |
| image_name, self.host.hostname).url() |
| repo_url = tools.get_package_url(devserver_url, image_name) |
| return image_name, {ds_constants.JOB_REPO_URL: repo_url} |
