#!/usr/bin/env python # Copyright (c) 2010-2012 OpenStack Foundation # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or # implied. # See the License for the specific language governing permissions and # limitations under the License. import datetime import glob import locale import os import os.path import re import subprocess import sys import six from six.moves.configparser import ConfigParser from swift.common.utils import backward, get_logger, dump_recon_cache, \ config_true_value def get_devices(device_dir, logger): devices = [] for line in open('/proc/mounts').readlines(): data = line.strip().split() block_device = data[0] mount_point = data[1] if mount_point.startswith(device_dir): device = {} device['mount_point'] = mount_point device['block_device'] = block_device try: device_num = os.stat(block_device).st_rdev except OSError: # If we can't stat the device, then something weird is going on logger.error("Error: Could not stat %s!" % block_device) continue device['major'] = str(os.major(device_num)) device['minor'] = str(os.minor(device_num)) devices.append(device) for line in open('/proc/partitions').readlines()[2:]: major, minor, blocks, kernel_device = line.strip().split() device = [d for d in devices if d['major'] == major and d['minor'] == minor] if device: device[0]['kernel_device'] = kernel_device return devices def get_errors(error_re, log_file_pattern, minutes, logger, log_file_encoding): # Assuming log rotation is being used, we need to examine # recently rotated files in case the rotation occurred # just before the script is being run - the data we are # looking for may have rotated. # # The globbing used before would not work with all out-of-box # distro setup for logrotate and syslog therefore moving this # to the config where one can set it with the desired # globbing pattern. log_files = [f for f in glob.glob(log_file_pattern)] try: log_files.sort(key=lambda f: os.stat(f).st_mtime, reverse=True) except (IOError, OSError) as exc: logger.error(exc) print(exc) sys.exit(1) now_time = datetime.datetime.now() end_time = now_time - datetime.timedelta(minutes=minutes) # kern.log does not contain the year so we need to keep # track of the year and month in case the year recently # ticked over year = now_time.year prev_entry_month = now_time.strftime('%b') errors = {} reached_old_logs = False for path in log_files: try: f = open(path, 'rb') except IOError: logger.error("Error: Unable to open " + path) print("Unable to open " + path) sys.exit(1) for line in backward(f): if not six.PY2: line = line.decode(log_file_encoding, 'surrogateescape') if '[ 0.000000]' in line \ or 'KERNEL supported cpus:' in line \ or 'BIOS-provided physical RAM map:' in line: # Ignore anything before the last boot reached_old_logs = True break # Solves the problem with year change - kern.log does not # keep track of the year. log_time_entry = line.split()[:3] if log_time_entry[0] == 'Dec' and prev_entry_month == 'Jan': year -= 1 prev_entry_month = log_time_entry[0] log_time_string = '%d %s' % (year, ' '.join(log_time_entry)) try: log_time = datetime.datetime.strptime( log_time_string, '%Y %b %d %H:%M:%S') except ValueError: continue if log_time > end_time: for err in error_re: for device in err.findall(line): errors[device] = errors.get(device, 0) + 1 else: reached_old_logs = True break if reached_old_logs: break return errors def comment_fstab(mount_point): with open('/etc/fstab', 'r') as fstab: with open('/etc/fstab.new', 'w') as new_fstab: for line in fstab: parts = line.split() if len(parts) > 2 \ and parts[1] == mount_point \ and not line.startswith('#'): new_fstab.write('#' + line) else: new_fstab.write(line) os.rename('/etc/fstab.new', '/etc/fstab') if __name__ == '__main__': c = ConfigParser() try: conf_path = sys.argv[1] except Exception: print("Usage: %s CONF_FILE" % sys.argv[0].split('/')[-1]) sys.exit(1) if not c.read(conf_path): print("Unable to read config file %s" % conf_path) sys.exit(1) conf = dict(c.items('drive-audit')) device_dir = conf.get('device_dir', '/srv/node') minutes = int(conf.get('minutes', 60)) error_limit = int(conf.get('error_limit', 1)) recon_cache_path = conf.get('recon_cache_path', "/var/cache/swift") log_file_pattern = conf.get('log_file_pattern', '/var/log/kern.*[!.][!g][!z]') log_file_encoding = conf.get('log_file_encoding', 'auto') if log_file_encoding == 'auto': log_file_encoding = locale.getpreferredencoding() log_to_console = config_true_value(conf.get('log_to_console', False)) error_re = [] for conf_key in conf: if conf_key.startswith('regex_pattern_'): error_pattern = conf[conf_key] try: r = re.compile(error_pattern) except re.error: sys.exit('Error: unable to compile regex pattern "%s"' % error_pattern) error_re.append(r) if not error_re: error_re = [ re.compile(r'\berror\b.*\b(sd[a-z]{1,2}\d?)\b'), re.compile(r'\b(sd[a-z]{1,2}\d?)\b.*\berror\b'), ] conf['log_name'] = conf.get('log_name', 'drive-audit') logger = get_logger(conf, log_to_console=log_to_console, log_route='drive-audit') devices = get_devices(device_dir, logger) logger.debug("Devices found: %s" % str(devices)) if not devices: logger.error("Error: No devices found!") recon_errors = {} total_errors = 0 for device in devices: recon_errors[device['mount_point']] = 0 errors = get_errors(error_re, log_file_pattern, minutes, logger, log_file_encoding) logger.debug("Errors found: %s" % str(errors)) unmounts = 0 for kernel_device, count in errors.items(): if count >= error_limit: device = \ [d for d in devices if d['kernel_device'] == kernel_device] if device: mount_point = device[0]['mount_point'] if mount_point.startswith(device_dir): if config_true_value(conf.get('unmount_failed_device', True)): logger.info("Unmounting %s with %d errors" % (mount_point, count)) subprocess.call(['umount', '-fl', mount_point]) logger.info("Commenting out %s from /etc/fstab" % (mount_point)) comment_fstab(mount_point) unmounts += 1 else: logger.info("Detected %s with %d errors " "(Device not unmounted)" % (mount_point, count)) recon_errors[mount_point] = count total_errors += count recon_file = recon_cache_path + "/drive.recon" dump_recon_cache(recon_errors, recon_file, logger) dump_recon_cache({'drive_audit_errors': total_errors}, recon_file, logger, set_owner=conf.get("user", "swift")) if unmounts == 0: logger.info("No drives were unmounted") elif os.path.isdir("/run/systemd/system"): logger.debug("fstab updated, calling systemctl daemon-reload") subprocess.call(["/usr/bin/systemctl", "daemon-reload"])