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125 lines
3.7 KiB
Python
Executable File
125 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python
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"""
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gunicorn_status - A munin plugin for Linux to monitor gunicorn processes
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Copyright (C) 2012 Azavea, Inc.
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Author: Andrew Jennings
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Like Munin, this plugin is licensed under the GNU GPL v2 license
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http://www.opensource.org/licenses/GPL-2.0
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If you've put your gunicorn pid somewhere other than the
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default /var/run/gunicorn.pid, you can add a section like
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this to your munin-node's plugin configuration:
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[gunicorn_*]
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env.gunicorn_pid_path [path to your gunicorn pid]
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This plugin supports the following munin configuration parameters:
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#%# family=auto contrib
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#%# capabilities=autoconf
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"""
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import sys, os, re
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from subprocess import check_output
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from time import sleep
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# set path to your gunicorn pid
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try:
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GUNICORN_PID_PATH = os.environ['gunicorn_pid_path']
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except:
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GUNICORN_PID_PATH = "/var/run/gunicorn.pid"
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class GunicornStatus():
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master_pid = ''
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"""
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The gunicorn master process pid, as a string
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"""
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worker_pids = ''
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"""
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The list of gunicorn processes as strings
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"""
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def __init__(self):
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try:
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self._get_master_pid()
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self._get_worker_pids(self.master_pid)
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except:
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sys.exit("Couldn't read gunicorn pid")
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def print_total_workers(self):
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print ('total_workers.value %d' % self._worker_count())
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def print_idle_workers(self):
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print ('idle_workers.value %d' % self._idle_worker_count())
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def _get_master_pid(self):
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master_pid_file = open(GUNICORN_PID_PATH)
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self.master_pid = master_pid_file.read().rstrip()
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master_pid_file.close()
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def _get_worker_pids(self, master_pid):
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children = check_output(
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['ps', '--ppid', master_pid, '-o', 'pid', '--no-headers'])
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self.worker_pids = [pid.strip() for pid in children.splitlines()]
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def _worker_count(self):
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return len(self.worker_pids)
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def _idle_worker_count(self):
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idle_workers = 0
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for pid in self.worker_pids:
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before = self._cpu_time(pid)
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sleep(0.50)
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after = self._cpu_time(pid)
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if before == after:
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idle_workers += 1
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return idle_workers
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def _cpu_time(self, pid):
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proc_info = open('/proc/%s/stat' % pid).read()
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proc_info = [field.rstrip() for field in proc_info.split()]
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user_time = int(proc_info[13].rstrip())
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kernel_time = int(proc_info[14].rstrip())
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return user_time + kernel_time
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def print_config():
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instance = None
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name = os.path.basename(sys.argv[0])
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if name != "gunicorn_status":
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for r in ("^gunicorn_(.*?)_status$", "^gunicorn_status_(.*?)$"):
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m = re.match(r, name, re.IGNORECASE)
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if m:
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instance = m.group(1)
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break
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graph_title = "graph_title Gunicorn - Status"
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if instance:
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graph_title = "%s - %s" % (graph_title, instance)
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print graph_title
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print "graph_args -l 0"
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print "graph_vlabel Number of workers"
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print "graph_category appserver"
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print "total_workers.label Total Workers"
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print "idle_workers.label Idle Workers"
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if __name__ == "__main__":
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if len(sys.argv) == 2 and sys.argv[1] == 'config':
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print_config()
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elif len(sys.argv) == 2 and sys.argv[1] == 'autoconf':
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try:
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open(GUNICORN_PID_PATH).close()
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print "yes"
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except:
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print "no"
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# Some docs say it'll be called with fetch, some say no arg at all
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elif len(sys.argv) == 1 or (len(sys.argv) == 2 and sys.argv[1] == 'fetch'):
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status = GunicornStatus()
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try:
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status.print_total_workers()
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status.print_idle_workers()
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except:
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sys.exit("Couldn't retrieve gunicorn status")
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