kill hung nginx workers

py

#!/usr/bin/env python2.7
#
# kills openresty nginx and possibly regular nginx '"hung"' worker processes
#
# version 0.1
#

import psutil
import os
import time
import signal
import sys

grumpy = "nginx: worker process"

VERBOSE = bool("-v" in sys.argv)

for proc in psutil.process_iter():
    try:
        pinfo = proc.as_dict(attrs=['pid', 'name', 'username', 'cmdline'])
    except psutil.NoSuchProcess:
        pass
    else:
        if pinfo.get("cmdline"):
            cmdline = pinfo.get("cmdline")
            if grumpy in cmdline:
                foundpid = pinfo.get("pid")
                test_list = []
                for i in range(10):
                    p = psutil.Process(pid=foundpid)
                    p_cpu = p.cpu_percent(interval=0.1)
                    test_list.append(p_cpu)
                result = float(sum(test_list)) / len(test_list)
                if result > 85.0:
                    if VERBOSE: print("High CPU nginx Worker Process Found :( PID: {} CPU %: {}").format(foundpid, result)
                    os.kill(foundpid, signal.SIGKILL)
                    if VERBOSE: print("Sleeping 30 seconds...")
                    time.sleep(30)