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#!/usr/bin/env python
""" Nagios check for haproxy over-subscription.
fedmsg-gateway is the primary concern as it can eat up a ton of simultaneous
connections.
:Author: Ralph Bean <rbean@redhat.com>
"""
import socket
import sys
def _numeric(value):
""" Type casting utility """
try:
return int(value)
except ValueError:
try:
return float(value)
except ValueError:
return value
def query(sockname="/var/run/haproxy-stat"):
""" Read stats from the haproxy socket and return a dict """
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect("/var/run/haproxy-stat")
s.send('show info\n')
try:
response = s.recv(1024).strip()
lines = response.split('\n')
data = dict([map(str.strip, line.split(':')) for line in lines])
data = dict([(k, _numeric(v)) for k, v in data.items()])
return data
except Exception, e:
print str(e)
finally:
s.close()
return None
def nagios_check(data):
""" Print warnings and return nagios exit codes. """
current = data['CurrConns']
maxconn = data['Maxconn']
percent = 100 * float(current) / float(maxconn)
details = "%.2f%% subscribed. %i current of %i maxconn." % (
percent, current, maxconn,
)
if percent < 50:
print "HAPROXY SUBS OK: " + details
return 0
if percent < 75:
print "HAPROXY SUBS WARN: " + details
return 1
if percent <= 100:
print "HAPROXY SUBS CRIT: " + details
return 2
print "HAPROXY SUBS UNKNOWN: " + details
return 3
if __name__ == '__main__':
try:
data = query(sockname="/var/run/haproxy-stat")
except Exception as e:
print "HAPROXY SUBS UNKNOWN: " + str(e)
sys.exit(3)
sys.exit(nagios_check(data))
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