317 lines
6.4 KiB
Python
Executable File
317 lines
6.4 KiB
Python
Executable File
#!/usr/bin/env python
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# $Id: hbc,v 1.9 2012/03/29 02:08:36 andreas Exp $
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# require on Linux
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# python-filelock
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# python-daemon vs 1.61 or >
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# on *bsd
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# py27-lockfile
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# py-27-daemon
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# or run sudo easy_install-2.7 lockfile daemon
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import sys
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import time
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import socket
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import os
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import signal
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import getopt
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import string
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import select
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import errno
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import traceback
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import lockfile
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import daemon
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import daemon.pidfile
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import syslog
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PORT = 50003
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INTERVAL = 10
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PIDFILE = '/tmp/hbc.pid'
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DBG = False
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sock = None
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up = True
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ackcount = 0
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class NullDevice:
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def write(self, s):
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pass
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def syslogtrace(note):
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logm = '%s hbc died: \n%s' % (note, traceback.format_exc())
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for l in logm.split('\n'):
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syslog.syslog(' tb: %s' % l)
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def getsock(host):
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try:
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r=socket.getaddrinfo(host, 50001, 0, 0, socket.SOL_UDP)
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except socket.gaierror:
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logm = '%s hbc died: \n%s' % ('getsock', traceback.format_exc())
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if DBG: print logm
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return None
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if r[0][0] in [28, 30]:
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af_type=socket.AF_INET6
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elif r[0][0] == 2:
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af_type=socket.AF_INET
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else:
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print "dont know this net type: %s" % r[0][0]
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sys.exit(1)
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if verbose:
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syslog.syslog("socktype: %s" % af_type)
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sock=socket.socket(af_type, socket.SOCK_DGRAM)
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sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR, \
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sock.getsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR) | 1)
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if verbose: syslog.syslog("get socket %s" % sock)
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return sock
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def socksend(msg, tohost):
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global sock
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if sock == None:
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sock=getsock(tohost[0])
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if DBG: print "socksend: sending msg=%s on socket=%s" % (msg, sock)
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sock.sendto(msg, tohost)
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if verbose: syslog.syslog("msg %s sent" % msg)
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def process():
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global up, sock, ackcount
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if sock == None:
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sock=getsock(tohost[0])
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ackcount=0
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lastT=time.time()
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while up:
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sleep=(lastT+interval) - time.time()
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if verbose: syslog.syslog("sleep %s" % sleep)
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if sleep > 0:
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try:
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r=select.select([sock.fileno()],[],[],sleep)
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except:
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if up:
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syslogtrace('select')
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break
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if verbose: syslog.syslog("r is %s" % str(r))
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if sock.fileno() in r[0]:
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data, addr = sock.recvfrom(1024)
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if data == "ACK":
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ackcount+=1
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else:
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try:
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os.system(data)
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except:
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syslogtrace('System')
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pass
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continue
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lastT=time.time()
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for hb_host in hb_hosts:
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try:
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msg="interval=%s;name=%s;time=%s;acks=%s" % (interval, iam, time.time(), ackcount)
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if verbose: syslog.syslog("sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port))
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socksend(msg, (hb_host, hb_port))
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except:
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logm = '%s hbc died: \n%s' % ('socksend', traceback.format_exc())
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if DBG: print logm
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pass
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def cleanup(a, b):
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global up, sock, ackcount
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up = False
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syslog.syslog('exit a=%s b=%s' % (str(a), str(b)))
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msg="shutdown=1;name=%s;acks=%s" % (iam, ackcount)
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for hb_host in hb_hosts:
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if verbose: syslog.syslog("hbc: sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port))
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socksend(msg, (hb_host, hb_port))
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time.sleep(1)
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sock.close()
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msgonly=False
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helpflag=False
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verbose=False
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fdaemon=False
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optlist=[]
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args=[]
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msgboot=[]
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home=os.environ['HOME']
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configfile="%s/.hbrc" % home
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try:
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optlist, args = getopt.getopt(sys.argv[1:], 'bc:dhm:v')
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except:
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helpflag=True
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for o,a in optlist:
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if o == '-b':
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msgboot.append("boot=1")
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elif o == '-c':
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configfile=a
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elif o == '-d':
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fdaemon=True
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elif o == '-h':
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helpflag=True
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elif o == '-m':
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msgboot.append("service=%s" % "service")
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a.replace(';',':')
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msgboot.append("msg=%s" % a)
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msgonly=True
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elif o == '-v':
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verbose=True
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if helpflag:
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print "hbc HeartBeatClient"
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print "usage: hbc [-bdhv] [-c configfile] [-m msg][host1 [..]]"
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print
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print " -b indicate machine boot"
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print " -c configfile"
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print " -d daemonize"
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print " -h this help"
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print " -m send a message"
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print " -v verbose"
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print
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print """ config file can contain
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hb_hosts=('host1', 'host2', ..._
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hb_port=50003
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interval=20
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logfile=...
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logfmt={|test|msg}
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grace=SECONDS
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reportstrict={True|False}
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"""
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sys.exit(1)
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#
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# set defaults
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hb_port=PORT
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interval=INTERVAL
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hb_hosts=[]
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iam=socket.gethostname()
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try:
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f=open(configfile,"r")
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if verbose: print "notice: using config file %s" % configfile
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except:
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if verbose: print "warning: running without config file: %s" % configfile
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f=None
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if f:
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while 1:
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l=f.readline()
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if len(l) == 0:
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break
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r=l[:-1].split('=')
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if r[0] == 'hb_hosts':
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hb_hosts=eval(r[1])
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if verbose:
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print "notice: cfg hb_hosts: %s" % hb_hosts
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elif r[0] == 'interval':
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interval=eval(r[1])
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elif r[0] == 'hb_port':
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hb_port=eval(r[1])
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elif r[0] == 'name':
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iam=eval(r[1])
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if verbose: print "name set to %s" % iam
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f.close()
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if len(args) != 0:
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hb_hosts=args
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if len(hb_hosts) == 0:
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print "no hb server specified"
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sys.exit(1)
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if verbose:
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print "notice: hb_hosts: %s" % str(hb_hosts)
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print "notice: hb_port: %s" % hb_port
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print "notice: interval: %s" % interval
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print "notice: iam: %s" % iam
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if not msgonly:
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msgboot.append("interval=%s" % interval)
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if len(msgboot) > 0:
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if DBG: print "on boot"
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msgboot.append("name=%s" % iam)
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msgboot.append("time=%s" % time.time())
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msgboot.append("acks=0")
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msg=";".join(msgboot)
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while 1:
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fail=0
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for hb_host in hb_hosts:
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try:
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if DBG: print "sock.send('%s', (%s, %s))" % (msg, hb_host, hb_port)
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socksend(msg, (hb_host, hb_port))
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except:
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logm = '%s hbc died: \n%s' % ('socksend2', traceback.format_exc())
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if DBG: print logm
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fail=1
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if fail:
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time.sleep(10)
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else:
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break
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if verbose: print "msgboot done msgonly=%s" % msgonly
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if msgonly:
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sys.exit(0)
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#
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#
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syslog.openlog(logoption=syslog.LOG_PID, facility=syslog.LOG_DAEMON)
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if fdaemon:
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pidfile = daemon.pidfile.TimeoutPIDLockFile(PIDFILE, acquire_timeout=-1)
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try:
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opid = pidfile.read_pid()
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except:
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opid = None
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if verbose: print "opid %s" % opid
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if opid:
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try:
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os.kill(opid, 0)
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is_running = True
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except:
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is_running = False
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if verbose: print "is_running %s" % is_running
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if is_running:
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print "process still alive %s" % opid
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sys.exit(1)
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print "warning: stale pid file removed"
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os.unlink(PIDFILE)
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print "daemoinizing... %s" % os.getpid()
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context = daemon.DaemonContext(
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working_directory='/tmp',
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umask=0o002,
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pidfile=pidfile,
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)
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context.signal_map = {
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signal.SIGTERM: cleanup,
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signal.SIGHUP: 'terminate',
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# signal.SIGUSR1: reload_program_config,
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}
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context.files_preserve = [sock, sock.fileno()]
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with context:
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syslog.syslog('starting heartbeat to %s' % ','.join(hb_hosts))
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up = True
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try:
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process()
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except:
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syslogtrace('process')
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cleanup(0, None)
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