memcached程序端口监控脚本

线上memcached服务器启动了很多实例，端口很多，需要对这些端口进行监控，并在端口关闭的情况下自启动。监控脚本如下：

[root@memcache2 ~]# ps -ef|grep /usr/bin/memcached|grep -v grep
root      6139     1  0  2016 ?        04:49:49 /usr/bin/memcached -d -m 512 -p 11212 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6184     1  0  2016 ?        00:29:25 /usr/bin/memcached -d -m 512 -p 11411 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6198     1  0  2016 ?        00:29:24 /usr/bin/memcached -d -m 512 -p 11412 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6214     1  0  2016 ?        00:30:17 /usr/bin/memcached -d -m 512 -p 11413 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6229     1  0  2016 ?        00:29:19 /usr/bin/memcached -d -m 512 -p 11521 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6244     1  0  2016 ?        00:29:49 /usr/bin/memcached -d -m 512 -p 11522 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6259     1  0  2016 ?        00:09:27 /usr/bin/memcached -d -m 512 -p 11211 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6274     1  0  2016 ?        00:09:22 /usr/bin/memcached -d -m 512 -p 11213 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6289     1  0  2016 ?        00:29:54 /usr/bin/memcached -d -m 512 -p 11221 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root      6304     1  0  2016 ?        00:29:16 /usr/bin/memcached -d -m 512 -p 11222 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root     12514     1  0 13:00 ?        00:00:00 /usr/bin/memcached -d -m 512 -p 11321 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root     12758     1  0 13:02 ?        00:00:00 /usr/bin/memcached -d -m 512 -p 11322 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11322.pid
root     24085     1  0  2016 ?        00:31:33 /usr/bin/memcached -d -m 512 -p 11311 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11311.pid
root     24100     1  0  2016 ?        00:31:55 /usr/bin/memcached -d -m 512 -p 11312 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11312.pid
root     24115     1  0  2016 ?        00:31:51 /usr/bin/memcached -d -m 512 -p 11313 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11313.pid
root     24740     1  0  2016 ?        00:03:20 /usr/bin/memcached -d -m 512 -p 11811 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11811.pid
root     24755     1  0  2016 ?        00:03:19 /usr/bin/memcached -d -m 512 -p 11812 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11812.pid
root     24770     1  0  2016 ?        00:03:18 /usr/bin/memcached -d -m 512 -p 11813 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11813.pid
root     24785     1  0  2016 ?        00:03:18 /usr/bin/memcached -d -m 512 -p 11814 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11814.pid
root     24800     1  0  2016 ?        00:03:19 /usr/bin/memcached -d -m 512 -p 11815 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11815.pid
root     24815     1  0  2016 ?        00:03:14 /usr/bin/memcached -d -m 512 -p 11816 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11816.pid
root     24830     1  0  2016 ?        00:03:17 /usr/bin/memcached -d -m 512 -p 11817 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11817.pid
root     24845     1  0  2016 ?        00:03:17 /usr/bin/memcached -d -m 512 -p 11818 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11818.pid
root     24860     1  0  2016 ?        00:03:14 /usr/bin/memcached -d -m 512 -p 11819 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11819.pid
root     24875     1  0  2016 ?        00:03:18 /usr/bin/memcached -d -m 512 -p 11820 -u root -c 4096 -P /var/lib/memcache/logs/memcached_11820.pid

[root@memcache2 ~]# ps -ef|grep /usr/bin/memcached|grep -v grep|awk -F" " '{print $13}' > /root/memcache_port.list

[root@memcache2 ~]# cat /root/memcache_port.list
11212
11411
11412
11413
11521
11522
11211
11213
11221
11222
11321
11322
11311
11312
11313
11811
11812
11813
11814
11815
11816
11817
11818
11819
11820

[root@memcache2 ~]# cat memcache_port.sh              //脚本权限是755
#!/bin/bash
for i in `cat /root/memcache_port.list`
do
  NUM=$(/usr/sbin/lsof -i:$i|wc -l)
  if [ $NUM -eq 0 ];then
    /usr/bin/memcached -d -m 512 -p $i -u root -c 4096 -P /var/lib/memcache/logs/memcached_$i.pid
  else
    echo "$i is ok"
  fi
done

[root@memcache2 ~]# crontab -l
* * * * * /bin/bash -x /root/memcache_port.sh > /dev/null 2>&1