Restart php-fpm when nginx returns status 502.

nginx502.py

import httplib2, os, time
def getCurTime():
    return time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))

def logging(str):
    file=open("nginx502.log", "w")
    file.writelines(str)
    file.close()

h = httplib2.Http(".cache")
restartCmd="/etc/init.d/php-fpm restart"
while True:
    (resp_headers, content) = h.request("http://codepp.net/", headers={'cache-control':'no-cache'})
    if resp_headers["status"]=="502":
        logging("[{0}] encounter 502, execute {1}.\n".format(getCurTime(), restartCmd))
        os.system(restartCmd)
    time.sleep(60)