147 lines
5.3 KiB
Python
Executable File
147 lines
5.3 KiB
Python
Executable File
#!/usr/bin/python
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# -*- encoding: utf-8; py-indent-offset: 4 -*-
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# +------------------------------------------------------------------+
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# | ____ _ _ __ __ _ __ |
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# | / ___| |__ ___ ___| | __ | \/ | |/ / |
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# | | | | '_ \ / _ \/ __| |/ / | |\/| | ' / |
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# | | |___| | | | __/ (__| < | | | | . \ |
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# | \____|_| |_|\___|\___|_|\_\___|_| |_|_|\_\ |
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# | |
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# | Copyright Mathias Kettner 2014 mk@mathias-kettner.de |
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# +------------------------------------------------------------------+
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#
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# This file is part of Check_MK.
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# The official homepage is at http://mathias-kettner.de/check_mk.
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#
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# check_mk is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation in version 2. check_mk is distributed
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# in the hope that it will be useful, but WITHOUT ANY WARRANTY; with-
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# out even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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# PARTICULAR PURPOSE. See the GNU General Public License for more de-
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# tails. You should have received a copy of the GNU General Public
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# License along with GNU Make; see the file COPYING. If not, write
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# to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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# Boston, MA 02110-1301 USA.
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# Check_MK-Agent-Plugin - Nginx Server Status
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#
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# Fetches the stub nginx_status page from detected or configured nginx
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# processes to gather status information about this process.
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#
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# Take a look at the check man page for details on how to configure this
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# plugin and check.
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#
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# By default this plugin tries to detect all locally running processes
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# and to monitor them. If this is not good for your environment you might
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# create an nginx_status.cfg file in MK_CONFDIR and populate the servers
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# list to prevent executing the detection mechanism.
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import os, sys, urllib2, re
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# tell urllib2 not to honour "http(s)_proxy" env variables
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urllib2.getproxies = lambda: {}
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config_dir = os.getenv("MK_CONFDIR", "/etc/check_mk")
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config_file = config_dir + "/nginx_status.cfg"
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# None or list of (proto, ipaddress, port) tuples.
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# proto is 'http' or 'https'
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servers = None
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ssl_ports = [ 443, ]
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if os.path.exists(config_file):
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execfile(config_file)
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def try_detect_servers():
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pids = []
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results = []
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for line in os.popen('netstat -tlnp 2>/dev/null').readlines():
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parts = line.split()
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# Skip lines with wrong format
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if len(parts) < 7 or '/' not in parts[6]:
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continue
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pid, proc = parts[6].split('/', 1)
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to_replace = re.compile('^.*/')
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proc = to_replace.sub('', proc)
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procs = [ 'nginx', 'nginx:', 'nginx.conf' ]
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# the pid/proc field length is limited to 19 chars. Thus in case of
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# long PIDs, the process names are stripped of by that length.
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# Workaround this problem here
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procs = [ p[:19 - len(pid) - 1] for p in procs ]
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# Skip unwanted processes
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if proc not in procs:
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continue
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# Add only the first found port of a single server process
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if pid in pids:
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continue
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pids.append(pid)
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proto = 'http'
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address, port = parts[3].rsplit(':', 1)
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port = int(port)
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# Use localhost when listening globally
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if address == '0.0.0.0':
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address = '127.0.0.1'
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elif address == '::':
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address = '::1'
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# Switch protocol if port is SSL port. In case you use SSL on another
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# port you would have to change/extend the ssl_port list
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if port in ssl_ports:
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proto = 'https'
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results.append((proto, address, port))
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return results
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if servers is None:
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servers = try_detect_servers()
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if not servers:
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sys.exit(0)
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sys.stdout.write('<<<nginx_status>>>\n')
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for server in servers:
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if isinstance(server, tuple):
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proto, address, port = server
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page = 'nginx_status'
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else:
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proto = server['protocol']
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address = server['address']
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port = server['port']
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page = server.get('page', 'nginx_status')
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try:
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url = '%s://%s:%s/%s' % (proto, address, port, page)
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# Try to fetch the status page for each server
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try:
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request = urllib2.Request(url, headers={"Accept" : "text/plain"})
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fd = urllib2.urlopen(request)
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except urllib2.URLError, e:
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if 'SSL23_GET_SERVER_HELLO:unknown protocol' in str(e):
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# HACK: workaround misconfigurations where port 443 is used for
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# serving non ssl secured http
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url = 'http://%s:%s/%s' % (address, port, page)
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fd = urllib2.urlopen(url)
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else:
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raise
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for line in fd.read().split('\n'):
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if not line.strip():
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continue
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if line.lstrip()[0] == '<':
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# seems to be html output. Skip this server.
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break
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sys.stdout.write("%s %s %s\n" % (address, port, line))
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except urllib2.HTTPError, e:
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sys.stderr.write('HTTP-Error (%s:%d): %s %s\n' % (address, port, e.code, e))
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except Exception, e:
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sys.stderr.write('Exception (%s:%d): %s\n' % (address, port, e))
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