apache httpd monitor

http_monitor.sh

#!/bin/sh

logfile=/tmp/httpd.log
Date=`date '+%Y-%m-%d %H:%M:%S'`

httpd_proc_num=`pgrep httpd | wc -l`

## httpd进程数少于3，说明有异常，重启服务：
if [ $httpd_proc_num -lt 3 ]; then
	echo "$Date httpd process count: $httpd_proc_num, restart it" >> $logfile
	service httpd restart >> $logfile 2>> $logfile
fi


if [ $httpd_proc_num -gt 300 ]; then
	netinfo=`netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' | tr '\n' '\t'`
	echo "$Date httpd process count: $httpd_proc_num, socket: $netinfo" >> $logfile
fi


## httpd进程数超过1200，重启服务：
if [ $httpd_proc_num -gt 1200 ]; then
	netinfo=`netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' | tr '\n' '\t'`
	echo "$(date '+%Y-%m-%d %H:%M:%S') httpd process count: $httpd_proc_num, socket: $netinfo. kill all" >> $logfile

	for pid in `pgrep httpd`
	do
		kill -9 $pid
	done

	echo "$(date '+%Y-%m-%d %H:%M:%S') restart httpd service" >> $logfile
	service httpd restart >> $logfile 2>> $logfile
fi