blob: b7301573db1c0dcaeb27d7e93201ca7c7d5e3db8 [file] [log] [blame]
# Lint as: python2, python3
"""This class defines the Remote host class."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import os, logging, time
import six
from six.moves import urllib
import re
from autotest_lib.client.common_lib import error
from autotest_lib.server import utils
from autotest_lib.server.hosts import base_classes
class RemoteHost(base_classes.Host):
This class represents a remote machine on which you can run
It may be accessed through a network, a serial line, ...
It is not the machine autoserv is running on.
Implementation details:
This is an abstract class, leaf subclasses must implement the methods
listed here and in parent classes which have no implementation. They
may reimplement methods which already have an implementation. You
must not instantiate this class but should instantiate one of those
leaf subclasses.
VAR_LOG_MESSAGES_COPY_PATH = "/var/tmp/messages.autotest_start"
TMP_DIR_TEMPLATE = '/usr/local/tmp/autoserv-XXXXXX'
def _initialize(self, hostname, autodir=None, *args, **dargs):
super(RemoteHost, self)._initialize(*args, **dargs)
self.hostname = hostname
self.autodir = autodir
self.tmp_dirs = []
def __repr__(self):
return "<remote host: %s>" % self.hostname
def close(self):
# pylint: disable=missing-docstring
super(RemoteHost, self).close()
if hasattr(self, 'tmp_dirs'):
for dir in self.tmp_dirs:
try:'rm -rf "%s"' % (utils.sh_escape(dir)))
except error.AutoservRunError:
def job_start(self):
Abstract method, called the first time a remote host object
is created for a specific host after a job starts.
This method depends on the create_host factory being used to
construct your host object. If you directly construct host objects
you will need to call this method yourself (and enforce the
single-call rule).
cmd = ('test ! -e /var/log/messages || cp -f /var/log/messages '
except Exception as e:
# Non-fatal error'Failed to copy /var/log/messages at startup: %s', e)
def get_autodir(self):
return self.autodir
def set_autodir(self, autodir):
This method is called to make the host object aware of the
where autotest is installed. Called in server/
after a successful install
self.autodir = autodir
def sysrq_reboot(self):
# pylint: disable=missing-docstring
self.run_background('echo b > /proc/sysrq-trigger')
def halt(self, timeout=DEFAULT_HALT_TIMEOUT, wait=True):
Shut down the remote host.
N.B. This method makes no provision to bring the target back
up. The target will be offline indefinitely if there's no
independent hardware (servo, RPM, etc.) to force the target to
power on.
@param timeout Maximum time to wait for host down, in seconds.
@param wait Whether to wait for the host to go offline.
self.run_background('sleep 1 ; halt')
if wait:
def reboot(self, timeout=DEFAULT_REBOOT_TIMEOUT, wait=True,
fastsync=False, reboot_cmd=None, **dargs):
Reboot the remote host.
timeout - How long to wait for the reboot.
wait - Should we wait to see if the machine comes back up.
If this is set to True, ignores reboot_cmd's error
even if occurs.
fastsync - Don't wait for the sync to complete, just start one
and move on. This is for cases where rebooting prompty
is more important than data integrity and/or the
machine may have disks that cause sync to never return.
reboot_cmd - Reboot command to execute.
if not reboot_cmd:
reboot_cmd = ('sync & sleep 5; '
'reboot & sleep 60; '
'reboot -f & sleep 10; '
'reboot -nf & sleep 10; '
'telinit 6')
def reboot():
# pylint: disable=missing-docstring
self.record("GOOD", None, "reboot.start")
current_boot_id = None
current_boot_id = self.get_boot_id()
# sync before starting the reboot, so that a long sync during
# shutdown isn't timed out by wait_down's short timeout
if not fastsync:'sync; sync', timeout=timeout, ignore_status=True)
except error.AutoservRunError:
# If wait is set, ignore the error here, and rely on the
# wait_for_restart() for stability, instead.
# reboot_cmd sometimes causes an error even if reboot is
# successfully in progress. This is difficult to be avoided,
# because we have no much control on remote machine after
# "reboot" starts.
if not wait or current_boot_id is None:
# TODO(b/37652392): Revisit no-wait case, later.
self.record("ABORT", None, "reboot.start",
"reboot command failed")
if wait:
self.wait_for_restart(timeout, old_boot_id=current_boot_id,
# if this is a full reboot-and-wait, run the reboot inside a group
if wait:
self.log_op(self.OP_REBOOT, reboot)
def suspend(self, timeout, suspend_cmd,
Suspend the remote host.
timeout - How long to wait for the suspend in integer seconds.
suspend_cmd - suspend command to execute.
allow_early_resume - Boolean that indicate whether resume
before |timeout| is ok.
error.AutoservSuspendError - If |allow_early_resume| is False
and if device resumes before
# define a function for the supend and run it in a group
def suspend():
# pylint: disable=missing-docstring
self.record("GOOD", None, "suspend.start for %d seconds" % (timeout))
except error.AutoservRunError:
self.record("ABORT", None, "suspend.start",
"suspend command failed")
raise error.AutoservSuspendError("suspend command failed")
# Wait for some time, to ensure the machine is going to sleep.
# Not too long to check if the machine really suspended.
time_slice = min(timeout / 2, 300)
time_counter = time_slice
while time_counter < timeout + 60:
# Check if the machine is back. We check regularely to
# ensure the machine was suspended long enough.
if, tries=1, deadline=1) == 0:
if time_counter > timeout - 10:
time_slice = 5
time_counter += time_slice
if, tries=1, deadline=1) != 0:
raise error.AutoservSuspendError(
"DUT is not responding after %d seconds" % (time_counter))
start_time = time.time()
self.log_op(self.OP_SUSPEND, suspend)
lasted = time.time() - start_time"Device resumed after %d secs", lasted)
if (lasted < timeout and not allow_early_resume):
raise error.AutoservSuspendError(
"Suspend did not last long enough: %d instead of %d" % (
lasted, timeout))
def reboot_followup(self, *args, **dargs):
# pylint: disable=missing-docstring
super(RemoteHost, self).reboot_followup(*args, **dargs)
if self.job:
def wait_for_restart(self, timeout=DEFAULT_REBOOT_TIMEOUT, **dargs):
Wait for the host to come back from a reboot. This wraps the
generic wait_for_restart implementation in a reboot group.
def op_func():
# pylint: disable=missing-docstring
super(RemoteHost, self).wait_for_restart(timeout=timeout, **dargs)
self.log_op(self.OP_REBOOT, op_func)
def cleanup(self, reboot_cmd=None):
# pylint: disable=missing-docstring
super(RemoteHost, self).cleanup()
def get_tmp_dir(self, parent='/tmp'):
Return the pathname of a directory on the host suitable
for temporary file storage.
The directory and its content will be deleted automatically
on the destruction of the Host object that was used to obtain
template = os.path.join(parent, self.TMP_DIR_TEMPLATE)
dir_name ='mkdir -p %s && mktemp -d %s' % (parent, template)).stdout.rstrip()
return dir_name
def get_platform_label(self):
Return the platform label, or None if platform label is not set.
if self.job:
keyval_path = os.path.join(self.job.resultdir, 'host_keyvals',
keyvals = utils.read_keyval(keyval_path)
return keyvals.get('platform', None)
return None
def get_all_labels(self):
Return all labels, or empty list if label is not set.
if self.job:
keyval_path = os.path.join(self.job.resultdir, 'host_keyvals',
keyvals = utils.read_keyval(keyval_path)
all_labels = keyvals.get('labels', '')
if all_labels:
all_labels = all_labels.split(',')
return [urllib.parse.unquote(label) for label in all_labels]
return []
def delete_tmp_dir(self, tmpdir):
Delete the given temporary directory on the remote machine.
@param tmpdir The directory to delete.
"""'rm -rf "%s"' % utils.sh_escape(tmpdir), ignore_status=True)
def delete_all_tmp_dirs(self, parent='/tmp'):
Delete all directories in parent that were created by get_tmp_dir
Note that this may involve deleting directories created by calls to
get_tmp_dir on a different RemoteHost instance than the one running this
method. Only perform this operation when certain that this will not
cause unexpected behavior.
# follow mktemp's behavior of only expanding 3 or more consecutive Xs
if isinstance(parent, (list, tuple)):
parents = parent
parents = [parent]
rm_paths = []
for parent in parents:
base_template = re.sub('XXXX*', '*', self.TMP_DIR_TEMPLATE)
# distinguish between non-wildcard asterisks in parent directory name
# and wildcards inserted from the template
base = '*'.join(
['"%s"' % utils.sh_escape(x) for x in base_template.split('*')])
path = '"%s' % os.path.join(utils.sh_escape(parent), base[1:])
# remove deleted directories from tmp_dirs
regex = os.path.join(parent, re.sub('(XXXX*)',
lambda match: '[a-zA-Z0-9]{%d}' % len(,
regex += '(/|$)' # remove if matches, or is within a dir that matches
self.tmp_dirs = [x for x in self.tmp_dirs if not re.match(regex, x)]'rm -rf {}'.format(" ".join(rm_paths)), ignore_status=True)
def check_uptime(self):
Check that uptime is available and monotonically increasing.
if not self.is_up():
raise error.AutoservHostError('Client does not appear to be up')
result ="/bin/cat /proc/uptime", 30)
return result.stdout.strip().split()[0]
def check_for_lkdtm(self):
Check for kernel dump test module. return True if exist.
cmd = 'ls /sys/kernel/debug/provoke-crash/DIRECT'
return, ignore_status=True).exit_status == 0
def are_wait_up_processes_up(self):
Checks if any HOSTS waitup processes are running yet on the
remote host.
Returns True if any the waitup processes are running, False
processes = self.get_wait_up_processes()
if len(processes) == 0:
return True # wait up processes aren't being used
for procname in processes:
exit_status ="{ ps -e || ps; } | grep '%s'" % procname,
if exit_status == 0:
return True
return False
def get_labels(self):
"""Return a list of labels for this given host.
This is the main way to retrieve all the automatic labels for a host
as it will run through all the currently implemented label functions.
labels = []
for label_function in self._LABEL_FUNCTIONS:
label = label_function(self)
except Exception:
logging.exception('Label function %s failed; ignoring it.',
label = None
if label:
if type(label) is str:
elif type(label) is list:
return labels