ceph/src/ceph-crash.in

   1 #!@Python3_EXECUTABLE@
   2 # -*- mode:python -*-
   3 # vim: ts=4 sw=4 smarttab expandtab
   4
   5 import argparse
   6 import logging
   7 import os
   8 import signal
   9 import socket
  10 import subprocess
  11 import sys
  12 import time
  13
  14 logging.basicConfig(level=logging.INFO)
  15 log = logging.getLogger('ceph-crash')
  16
  17 auth_names = ['client.crash.%s' % socket.gethostname(),
  18               'client.crash',
  19               'client.admin']
  20
  21 def parse_args():
  22     parser = argparse.ArgumentParser()
  23     parser.add_argument(
  24         '-p', '--path', default='/var/lib/ceph/crash',
  25         help='base path to monitor for crash dumps')
  26     parser.add_argument(
  27         '-d', '--delay', default=10.0, type=float,
  28         help='minutes to delay between scans (0 to exit after one)',
  29     )
  30     parser.add_argument(
  31         '--name', '-n',
  32         help='ceph name to authenticate as (default: try client.crash, client.admin)')
  33     return parser.parse_args()
  34
  35
  36 def post_crash(path):
  37     rc = 0
  38     for n in auth_names:
  39         pr = subprocess.Popen(
  40             args=['timeout', '30', 'ceph',
  41                   '-n', n,
  42                   'crash', 'post', '-i', '-'],
  43             stdin=subprocess.PIPE,
  44             stdout=subprocess.PIPE,
  45             stderr=subprocess.PIPE,
  46         )
  47         f = open(os.path.join(path, 'meta'), 'rb')
  48         stdout, stderr = pr.communicate(input=f.read())
  49         rc = pr.wait()
  50         f.close()
  51         if rc != 0:
  52             log.warning('post %s as %s failed: %s' % (path, n, stderr))
  53         if rc == 0:
  54             break
  55     return rc
  56
  57
  58 def scrape_path(path):
  59     for p in os.listdir(path):
  60         crashpath = os.path.join(path, p)
  61         metapath = os.path.join(crashpath, 'meta')
  62         donepath = os.path.join(crashpath, 'done')
  63         if os.path.isfile(metapath):
  64             if not os.path.isfile(donepath):
  65                 # hang out just for a bit; either we interrupted the dump
  66                 # or the daemon crashed before finishing it
  67                 time.sleep(1)
  68                 if not os.path.isfile(donepath):
  69                     return
  70             # ok, we can process this one
  71             rc = post_crash(crashpath)
  72             if rc == 0:
  73                 os.rename(crashpath, os.path.join(path, 'posted/', p))
  74                 log.debug(
  75                     "posted %s and renamed %s -> %s " %
  76                     (metapath, p, os.path.join('posted/', p))
  77                 )
  78
  79 def handler(signum, frame):
  80     print('*** Interrupted with signal %d ***' % signum)
  81     sys.exit(0)
  82
  83 def main():
  84     # exit code 0 on SIGINT, SIGTERM
  85     signal.signal(signal.SIGINT, handler)
  86     signal.signal(signal.SIGTERM, handler)
  87
  88     args = parse_args()
  89     postdir = os.path.join(args.path, 'posted')
  90     if args.name:
  91         auth_names = [args.name]
  92
  93     while not os.path.isdir(postdir):
  94         log.error("directory %s does not exist; please create" % postdir)
  95         time.sleep(30)
  96
  97     log.info("monitoring path %s, delay %ds" % (args.path, args.delay * 60.0))
  98     while True:
  99         scrape_path(args.path)
 100         if args.delay == 0:
 101             sys.exit(0)
 102         time.sleep(args.delay * 60)
 103
 104
 105 if __name__ == "__main__":
 106     main()