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import os, time, pickle, logging, shutil
from autotest_lib.client.common_lib import global_config
from autotest_lib.server import utils
# import any site hooks for the crashdump and crashinfo collection
get_site_crashdumps = utils.import_site_function(
__file__, "autotest_lib.server.site_crashcollect", "get_site_crashdumps",
lambda host, test_start_time: None)
get_site_crashinfo = utils.import_site_function(
__file__, "autotest_lib.server.site_crashcollect", "get_site_crashinfo",
lambda host, test_start_time: None)
def get_crashdumps(host, test_start_time):
get_site_crashdumps(host, test_start_time)
def get_crashinfo(host, test_start_time):
logging.info("Collecting crash information...")
# include crashdumps as part of the general crashinfo
get_crashdumps(host, test_start_time)
if wait_for_machine_to_recover(host):
# run any site-specific collection
get_site_crashinfo(host, test_start_time)
crashinfo_dir = get_crashinfo_dir(host)
collect_messages(host)
collect_log_file(host, "/var/log/monitor-ssh-reboots", crashinfo_dir)
collect_command(host, "dmesg", os.path.join(crashinfo_dir, "dmesg"))
collect_uncollected_logs(host)
# Load default for number of hours to wait before giving up on crash collection.
HOURS_TO_WAIT = global_config.global_config.get_config_value(
'SERVER', 'crash_collection_hours_to_wait', type=float, default=4.0)
def wait_for_machine_to_recover(host, hours_to_wait=HOURS_TO_WAIT):
"""Wait for a machine (possibly down) to become accessible again.
@param host: A RemoteHost instance to wait on
@param hours_to_wait: Number of hours to wait before giving up
@returns: True if the machine comes back up, False otherwise
"""
current_time = time.strftime("%b %d %H:%M:%S", time.localtime())
if host.is_up():
logging.info("%s already up, collecting crash info", host.hostname)
return True
logging.info("Waiting %s hours for %s to come up (%s)",
hours_to_wait, host.hostname, current_time)
if not host.wait_up(timeout=hours_to_wait * 3600):
logging.warning("%s down, unable to collect crash info",
host.hostname)
return False
else:
logging.info("%s is back up, collecting crash info", host.hostname)
return True
def get_crashinfo_dir(host):
"""Find and if necessary create a directory to store crashinfo in.
@param host: The RemoteHost object that crashinfo will be collected from
@returns: The path to an existing directory for writing crashinfo into
"""
host_resultdir = getattr(getattr(host, "job", None), "resultdir", None)
if host_resultdir:
infodir = host_resultdir
else:
infodir = os.path.abspath(os.getcwd())
infodir = os.path.join(infodir, "crashinfo.%s" % host.hostname)
if not os.path.exists(infodir):
os.mkdir(infodir)
return infodir
def collect_log_file(host, log_path, dest_path):
"""Collects a log file from the remote machine.
Log files are collected from the remote machine and written into the
destination path. If dest_path is a directory, the log file will be named
using the basename of the remote log path.
@param host: The RemoteHost to collect logs from
@param log_path: The remote path to collect the log file from
@param dest_path: A path (file or directory) to write the copies logs into
"""
logging.info("Collecting %s...", log_path)
try:
host.get_file(log_path, dest_path, preserve_perm=False)
except Exception:
logging.warning("Collection of %s failed", log_path)
def collect_command(host, command, dest_path):
"""Collects the result of a command on the remote machine.
The standard output of the command will be collected and written into the
desitionation path. The destination path is assumed to be filename and
not a directory.
@param host: The RemoteHost to collect from
@param command: A shell command to run on the remote machine and capture
the output from.
@param dest_path: A file path to write the results of the log into
"""
logging.info("Collecting '%s' ...", command)
devnull = open("/dev/null", "w")
try:
try:
result = host.run(command, stdout_tee=devnull).stdout
utils.open_write_close(dest_path, result)
except Exception, e:
logging.warning("Collection of '%s' failed:\n%s", command, e)
finally:
devnull.close()
def collect_uncollected_logs(host):
"""Collects any leftover uncollected logs from the client.
@param host: The RemoteHost to collect from
"""
if host.job:
try:
logs = host.job.get_client_logs()
for hostname, remote_path, local_path in logs:
if hostname == host.hostname:
logging.info("Retrieving logs from %s:%s into %s",
hostname, remote_path, local_path)
host.get_file(remote_path + "/", local_path + "/")
except Exception, e:
logging.warning("Error while trying to collect stranded "
"Autotest client logs: %s", e)
def collect_messages(host):
"""Collects the 'new' contents of /var/log/messages.
If host.VAR_LOG_MESSAGE_COPY_PATH is on the remote machine, collects
the contents of /var/log/messages excluding whatever initial contents
are already present in host.VAR_LOG_MESSAGE_COPY_PATH. If it is not
present, simply collects the entire contents of /var/log/messages.
@param host: The RemoteHost to collect from
"""
crashinfo_dir = get_crashinfo_dir(host)
try:
# paths to the messages files
messages = os.path.join(crashinfo_dir, "messages")
messages_raw = os.path.join(crashinfo_dir, "messages.raw")
messages_at_start = os.path.join(crashinfo_dir, "messages.at_start")
# grab the files from the remote host
collect_log_file(host, host.VAR_LOG_MESSAGES_COPY_PATH,
messages_at_start)
collect_log_file(host, "/var/log/messages", messages_raw)
# figure out how much of messages.raw to skip
if os.path.exists(messages_at_start):
# if the first lines of the messages at start should match the
# first lines of the current messages; if they don't then messages
# has been erase or rotated and we just grab all of it
first_line_at_start = utils.read_one_line(messages_at_start)
first_line_now = utils.read_one_line(messages_raw)
if first_line_at_start != first_line_now:
size_at_start = 0
else:
size_at_start = os.path.getsize(messages_at_start)
else:
size_at_start = 0
raw_messages_file = open(messages_raw)
messages_file = open(messages, "w")
raw_messages_file.seek(size_at_start)
shutil.copyfileobj(raw_messages_file, messages_file)
raw_messages_file.close()
messages_file.close()
# get rid of the "raw" versions of messages
os.remove(messages_raw)
if os.path.exists(messages_at_start):
os.remove(messages_at_start)
except Exception, e:
logging.warning("Error while collecting /var/log/messages: %s", e)
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