#!/usr/bin/python # # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you 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. # # TODO: # add multipath -ll # add iscsiadm output # import time import socket import getopt import sys import subprocess, threading import logging import logging.handlers import re import shutil import os """ a class to do checks with as a thread so we can have nice timeouts """ class Check(object): def __init__(self, cmd="", failcmd="", primary="", file="", timeout="120", interval=1, logger="", check=False): self.file=file self.cmd=cmd self.failcmd=failcmd self.primary=primary self.timeout=timeout self.interval=interval self.process=None self.logger=logger self.check=check self.ok=None self.results={} def readhb(self,file=""): if os.path.isfile(file): text_file = open("%s" % file, "r") line=text_file.readline() text_file.close() return line return 0 def writehb(self,file=""): if file: nfile="%s.new" % (file) epoch=time.time() text_file = open("%s" % nfile, "w") text_file.write("%s" % epoch) text_file.close() shutil.move(nfile,file) self.logger.debug('Worked on file %s for %s' % (file, (time.time() - epoch))) """ We only want mounted nfs filesystems """ def nfsoutput(self): command="mount -v -t nfs" p=subprocess.Popen(command, shell=True, stdout=subprocess.PIPE) lines=map(lambda line: line.split()[2], p.stdout.readlines()) test=re.compile("^%s" % (primary)) lines=filter(test.search, lines) return lines """ The main run for all checks we do, everything is in here on purpose. the other FSs to heartbeat should be added to filesystems...! """ def run(self, timeout): def target(): filesystems=[] filesystems.extend(self.nfsoutput()) for fs in filesystems: if self.file: if self.check==False: self.writehb("%s/%s" % (fs,file)) else: res=self.readhb("%s/%s" % (fs,file)) delay = time.time() - float(res) if (delay < timeout) and self.ok == None: self.logger.info("%s/%s is ok %s with %s" % (fs,file,timeout,delay)) self.ok = True elif (delay > timeout): self.logger.warning("%s/%s exceeded timeout %s with %s" % (fs,file,timeout, delay)) self.ok = False self.results[fs] = [self.ok, delay] epoch=time.time() if self.cmd: self.logger.debug('Executing: %s' % (cmd)) self.process = subprocess.Popen(self.cmd, shell=True) self.process.communicate() self.logger.info('Executed: %s in %s' % (cmd, (time.time() - epoch))) thread = threading.Thread(target=target) thread.start() thread.join(self.timeout) if thread.isAlive() and self.check == False: self.logger.critical('Critical: thread timeout; %s' % (timeout)) if self.failcmd: self.logger.critical('Critical: executing; %s' % (failcmd)) p=subprocess.Popen(failcmd, shell=True, stdout=subprocess.PIPE) """ here we figure out what we're running on more or less """ def figureOutPrimary(): redhat="/etc/redhat-release" if os.path.isfile(redhat): for line in open(redhat): if "XenServer" in line: return "/var/run/sr-mount" if "Oracle VM server" in line: return "/OVS/Repositories/" print "Unknown hypervisor, consider adding it, exiting" sys.exit(42) """ The logger is here """ def Logger(level=logging.DEBUG): logger = logging.getLogger('cs-heartbeat') logger.setLevel(level) handler = logging.handlers.SysLogHandler(address = '/dev/log') logger.addHandler(handler) return logger """ main for preso-dent """ if __name__ == '__main__': me=os.path.basename(__file__) timeout=120 interval=1 hostname=socket.gethostname() file=".hb-%s" % (hostname) cmd="" level=logging.DEBUG primary="" checkstate=False failcmd=("echo 1 > /proc/sys/kernel/sysrq " "&& " "echo c > /proc/sysrq-trigger") # xenserver: if me == "heartbeat": # String result = callHostPluginPremium(conn, "heartbeat", # "host", _host.uuid, # "timeout", Integer.toString(_heartbeatTimeout), # "interval", Integer.toString(_heartbeatInterval)); # if (result == null || !result.contains("> DONE <")) { try: opts, args = getopt.getopt(sys.argv[1:], "h:y:i:s", [ 'host', 'timeout', 'interval', 'state']) except getopt.GetoptError: print """Usage: host: host guid. timeout: timeout to fail on interval: time between checks state: check the state""" sys.exit() for o, a in opts: if o in ('host'): file="hb-%s" % (a) if o in ('timeout'): timeout=a if o in ('interval'): interval=a if o in ('state'): checkstate=True # OVM3: else: # get options try: opts, args = getopt.getopt(sys.argv[1:], "g:p:f:c:t:i:s", [ 'guid=', 'primary=','failcmd=','cmd=','timeout=','interval', 'state']) except getopt.GetoptError: print """Usage: --guid|-g: guid of the host to check --primary|-p: match for primary storage to monitor. --failcmd|-f: executed on timeout. --cmd|-c: command to execute next to hb file(s) on primary. --timeout|-t: excute failcmd after timeout(s) is hit. --interval|-i: run the checks every %ss> --state|-s check state""" sys.exit() for o, a in opts: if o in ('-g', '--guid'): file=".hb-%s" % (a) if o in ('-p', '--primary'): primary=a if o in ('-f', '--failcmd'): failcmd=a if o in ('-c', '--cmd'): cmd=a if o in ('-t', '--timeout'): timeout=int(a) if o in ('-i', '--interval'): interval=int(a) if o in ('-s', '--state'): checkstate=True if primary == "": primary=figureOutPrimary() logger=Logger(level=level) if checkstate == False: os.chdir("/") # os.setsid() os.umask(0) try: pid = os.fork() if pid > 0: # exit first parent if me == "heartbeat": print "> DONE <" sys.exit(0) except OSError, e: print >>sys.stderr, "fork #1 failed: %d (%s)" % (e.errno, e.strerror) sys.exit(1) checker=Check(cmd=cmd, failcmd=failcmd, file=file, timeout=timeout, interval=interval, logger=logger, check=checkstate); while True: start=time.time() checker.run(timeout) runtime=time.time() - start logger.debug("cmd time: %s" % (runtime)) if checkstate: for fs in checker.results: print "%s: %s" % (fs, checker.results[fs]) if checker.ok == False: sys.exit(1) else: sys.exit(0) if runtime > interval: logger.warning('Warning: runtime %s bigger than interval %s' % (runtime, interval)) else: time.sleep(interval)