Script to setup Monit to autorestart a hanged php-fpm for CentOS

centos-install-monit-php-fpm.sh

#!/bin/bash

yum -y install monit
chkconfig monit on

echo 'set daemon  10              # check services at 30 seconds intervals
set logfile syslog
set httpd port 2812 and
    use address localhost  # only accept connection from localhost
    allow localhost        # allow localhost to connect to the server and
    allow admin:monit      # require user admin with password monit
set daemon 10
include /etc/monit.d/*
' > /etc/monit.conf

echo '
### Monitoring TCP socket php-fpm: the parent process.
check process php-fpm with pidfile /var/run/php-fpm/php-fpm.pid
  group phpcgi-tcp # phpcgi-tcp group
  start program = "/etc/init.d/php-fpm start"
  stop program  = "/etc/init.d/php-fpm stop"
  if failed port 9000  # we"re running it on port 9000
  ## This was stolen from here:
  ## http://richard.wallman.org.uk/2010/03/monitor-a-fastcgi-server-using-monit/
  ## and here:
  ## http://stackoverflow.com/questions/1302209/how-do-i-ping-a-fastcgi-server.
  ## Send FastCGI packet: version 1 (0x01), cmd FCGI_GET_VALUES (0x09)
  ## padding 8 bytes (0x08), followed by 8xNULLs padding.
  ## This follows the FCGI spec at http://www.fastcgi.com/devkit/doc/fcgi-spec.html#S3.
  ## 1. Version - 1 byte (version 1).
  ## 2. Type - 1 byte (FCGI_GET_VALUES = 9).
  ## 3. Request ID - 2 bytes (set to 0 - null request ID).
  ## 4. Content length - 2 bytes (set to 0).
  ## 5. Padding length - 1 byte (set to 8).
  ## 6. Reserved - 1 byte (set to 0).
  ## 7. Content data - variable size set to NULL.
  ## 8. Padding data - variable size set to 8 bytes (all NULL).
  send "\0x01\0x09\0x00\0x00\0x00\0x00\0x08\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00\0x00"
  ## Expect FastCGI packet: version 1 (0x01), resp FCGI_GET_VALUES_RESULT (0x0A).
  ## 1. Version - 1 byte (version 1).
  ## 2. Type - 1 byte (FCGI_GET_VALUES_RESULT = 10).
  expect "\0x01\0x0A"
  ## Timeout because we don"t care about anything else then the two initial bytes.
  timeout 2 seconds
  then restart
  ## If the restarts attempts fail then alert.
  # if 3 restarts within 5 cycles then timeout
  depends on php-fpm-tcp_bin
  depends on php-fpm-tcp_init
  alert admin@cityads.com only on {timeout}

## Test the php-fpm binary.
check file php-fpm-tcp_bin with path /usr/sbin/php-fpm
   group phpcgi-tcp
   if failed checksum then unmonitor
   if failed permission 755 then unmonitor
   if failed uid root then unmonitor
   if failed gid root then unmonitor
   alert admin@cityads.com

## Test the init scripts.
check file php-fpm-tcp_init with path /etc/init.d/php-fpm
   group phpcgi-tcp
   if failed checksum then unmonitor
   if failed permission 755 then unmonitor
   if failed uid root then unmonitor
   if failed gid root then unmonitor
   alert admin@cityads.com
' > /etc/monit.d/php-fpm

service monit restart