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#!/usr/bin/python
import urllib2
import json
import socket
import datetime
import sys
import time
import smtplib
import atexit
import socket
import signal
from email.mime.text import MIMEText
def dump(obj):
for attr in dir(obj):
print "obj.%s = %s" % (attr, getattr(obj, attr))
def testurl(url, timeout):
"""
returns a list, which first item is status, and optional second item is extra information, like:
['ok']
of
['other', 'overheating']
status:
'ok' - check ok
'head too old': arg = time diff in seconds
'connection refused'
'connection timeout'
'response timeout'
'other': arg = error string - other unknown errors
"""
try:
f = urllib2.urlopen(url, timeout=timeout)
now = datetime.datetime.utcnow()
obj = json.load(f)
if 'timestamp' in obj:
x = datetime.datetime.utcfromtimestamp(obj['timestamp'] / 1000) + datetime.timedelta(milliseconds = obj['timestamp'] % 1000)
secs = (now - x).total_seconds()
if secs > 7200:
return ['head too old', secs]
return ['ok']
return ['other', 'no timestamp in reply']
except urllib2.URLError as e:
#print 'except urllib2.URLError'
#print repr(e.reason)
reason_type = type(e.reason).__name__
if reason_type == 'error':
err_str = e.args[0].strerror
if err_str == 'Connection refused':
return ['connection refused']
else:
return ['other', str(e)]
elif reason_type == 'timeout':
# timeout when connecting
return ['connection timeout']
else:
return ['other', str(e)]
except IOError as e:
#print 'except IOError'
if type(e).__name__ == 'timeout':
# timeout when reading
return ['response timeout']
else:
return ['other', str(e)]
except:
return ['other', str(sys.exc_info()[0])]
"""
print repr(type(e.reason).__name__)
print 'repr(e) ', repr(e)
print 'e ', e
print 'e.args ', e.args
print 'e.errno ', e.errno
print 'e.strerror ', e.strerror
dump(e)
print 'repr(e.args[0]) ', repr(e.args[0])
dump (e.args[0])
"""
myhostname = None
def sendmsg(newstate, state, l, lastchange, adminonly=False):
global myhostname
if not myhostname:
myhostname = socket.gethostname()
txt = 'checkflimsy on %s\n' % (myhostname)
txt += 'state: %s\n' % newstate
if newstate == 'head too old':
txt += 'head too old: %f seconds\n' % l[1]
if newstate == 'other':
txt += 'message: %s\n' % str(l[1])
txt += 'last state change: %s\n' % lastchange.replace(microsecond=0).isoformat(' ')
delta = datetime.datetime.now().replace(microsecond=0) - lastchange.replace(microsecond=0)
txt += 'time since last state change: %s\n' % str(delta)
txt += '(previous state: %s)\n' % state
print txt # XXX
msg = MIMEText(txt)
fromaddr = 'foo-admin@example.net'
toaddrs = ['foo@example.net']
if adminonly:
toaddrs = ['foo@example.net']
subj = '%s flimsy status: %s' % (myhostname, newstate)
if newstate == 'other':
subj += ' - %s' % str(l[1])
if newstate not in ['ok', 'starting']:
subj += ' - WARNING'
msg['Subject'] = subj
msg['From'] = fromaddr
msg['To'] = ', '.join(toaddrs)
# Send the message via our own SMTP server, but don't include the
# envelope header.
s = smtplib.SMTP('localhost')
s.sendmail(fromaddr, toaddrs, msg.as_string())
s.quit()
lastchange = None
state = None
def runloop(url):
timeout = 10
sleeptime = 30
repeattime = 7200
lasttold = None
global lastchange
global state
while True:
#print '.' # XXX
l = testurl(url, timeout)
newstate = l[0]
now = datetime.datetime.now()
if state != newstate:
lastchange = now
lasttold = now
if state == None:
# starting
print 'check-flimsy started at %s' % (str(now))
sendmsg('starting', state, l, lastchange, adminonly=True)
else:
sendmsg(newstate, state, l, lastchange)
state = newstate
elif state != 'ok' and (now - lasttold) > datetime.timedelta(seconds=repeattime):
lasttold = now
sendmsg(newstate, state, l, lastchange)
time.sleep(sleeptime)
"""
'ok' - check ok
'head too old': arg = time diff in seconds
'connection refused'
'connection timeout'
'response timeout'
'other': arg = error string - other unknown errors
"""
def exitproc():
sendmsg('EXITING', state, ['-'], lastchange, adminonly=True)
def main():
url = 'https://flimsy.ct.nordu.net:8080/ct/v1/get-sth'
#url = 'http://127.0.0.1:8080'
while True:
try:
atexit.register(exitproc)
signal.signal(signal.SIGHUP, exitproc)
runloop(url)
except:
print "Unexpected error from runloop():", sys.exc_info()[0]
raise # XXX
main()
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