put in the first run at new nagios configs

roles/nagios_client/files/scripts/check_haproxy_conns.py

@@ -0,0 +1,76 @@
+#!/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))