Memcached服务端自动启动
所以,要将其设为自动启动的服务也就困难了。
上网搜索了一下,结果,得到以下一些结果,做个记录:
1、最傻的做法
通常:启动Memcache的服务器端的命令为:
# /usr/local/bin/memcached -d -m 10 -u root -l 192.168.0.200 -p 12000 -c 256 -P /tmp/memcached.pid
-d选项是启动一个守护进程,
-m是分配给Memcache使用的内存数量,单位是MB,我这里是10MB,
-u是运行Memcache的用户,我这里是root,
-l是监听的服务器IP地址,如果有多个地址的话,我这里指定了服务器的IP地址192.168.0.200,
-p是设置Memcache监听的端口,我这里设置了12000,最好是1024以上的端口,
-c选项是最大运行的并发连接数,默认是1024,我这里设置了256,按照你服务器的负载量来设定,
-P是设置保存Memcache的pid文件,我这里是保存在 /tmp/memcached.pid,
想开机自动启动的话,只需在/etc/rc.d/rc.local中加入一行,上面命令
有人用以下命令:
/usr/local/memcached/bin/memcached -d -m 20 -p 11211 -u apache
上面有些东西可以参考一下:即,ip不指定时,默认是本机,用户,最好选择是:apache 或 deamon
这样,也就是属于哪个用户的服务,由哪个用户启动。
2、较正规的方法:
To add a service to chkconfig you will normally need a couple of special comments below the shebang of a shell script:
- #!/bin/sh
- # chkconfig: - 55 45
- # description: The memcached daemon is a network memory cache service.
- # processname: memcached
#!/bin/sh # chkconfig: - 55 45 # description: The memcached daemon is a network memory cache service. # processname: memcached
After adding the lines to /etc/init.d/memcached you can then issue
chkconfig --add memcached
There are of course additional run levels a process can start at so to check that you would issue
chkconfig --list | grep "memcached"
A common run level for memcached would be
chkconfig --level 345 memcached on
说明:chkconfig --add memcached 用来添加memcached服务
chkconfig --list | grep "memcached" 检查服务是否添加
还可以简写为这样:
chkconfig --list | grep mem
chkconfig --level 345 memcached on 设置运行级别。
建议:最好使用chkconfig --level 235 memcached on 这样的话与apache级别相同,即只要有apache,就有memcached
3、更复杂的做法,创建完美的启动脚本
网上找到以下两个脚本:
- #!/bin/sh
- #
- # memcached: MemCached Daemon
- #
- # chkconfig: - 90 25
- # description: MemCached Daemon
- #
- # Source function library.
- . /etc/rc.d/init.d/functions
- . /etc/sysconfig/network
- #[ ${NETWORKING} = "no" ] && exit 0
- #[ -r /etc/sysconfig/dund ] || exit 0
- #. /etc/sysconfig/dund
- #[ -z "$DUNDARGS" ] && exit 0
- start()
- {
- echo -n $"Starting memcached: "
- daemon $MEMCACHED -u daemon -d -m 1024 -l 127.0.0.1 -p 11211
- echo
- }
- stop()
- {
- echo -n $"Shutting down memcached: "
- killproc memcached
- echo
- }
- MEMCACHED="/usr/local/memcached/bin/memcached"
- [ -f $MEMCACHED ] || exit 1
- # See how we were called.
- case "$1" in
- start)
- start
- ;;
- stop)
- stop
- ;;
- restart)
- stop
- sleep 3
- start
- ;;
- *)
- echo $"Usage: $0 {start|stop|restart}"
- exit 1
- esac
- exit 0
#!/bin/sh # # memcached: MemCached Daemon # # chkconfig: - 90 25 # description: MemCached Daemon # # Source function library. . /etc/rc.d/init.d/functions . /etc/sysconfig/network #[ ${NETWORKING} = "no" ] && exit 0 #[ -r /etc/sysconfig/dund ] || exit 0 #. /etc/sysconfig/dund #[ -z "$DUNDARGS" ] && exit 0 start() { echo -n $"Starting memcached: " daemon $MEMCACHED -u daemon -d -m 1024 -l 127.0.0.1 -p 11211 echo } stop() { echo -n $"Shutting down memcached: " killproc memcached echo } MEMCACHED="/usr/local/memcached/bin/memcached" [ -f $MEMCACHED ] || exit 1 # See how we were called. case "$1" in start) start ;; stop) stop ;; restart) stop sleep 3 start ;; *) echo $"Usage: $0 {start|stop|restart}" exit 1 esac exit 0
- #!/bin/sh
- #
- # memcached: MemCached Daemon
- #
- # chkconfig: - 90 25
- # description: MemCached Daemon
- #
- # Source function library.
- . /etc/rc.d/init.d/functions
- . /etc/sysconfig/network
- start()
- {
- echo -n $"Starting memcached: "
- daemon /usr/local/bin/memcached -u daemon -d -m 4096 -l 10.10.10.220 -p 58728
- echo
- }
- stop()
- {
- echo -n $"Shutting down memcached: "
- killproc memcached
- echo
- }
- [ -f /usr/local/bin/memcached ] || exit 0
- # See how we were called.
- case "$1" in
- start)
- start
- ;;
- stop)
- stop
- ;;
- restart|reload)
- stop
- start
- ;;
- condrestart)
- stop
- start
- ;;
- *)
- echo $"Usage: $0 {start|stop|restart|reload|condrestart}"
- exit 1
- esac
- exit 0
#!/bin/sh # # memcached: MemCached Daemon # # chkconfig: - 90 25 # description: MemCached Daemon # # Source function library. . /etc/rc.d/init.d/functions . /etc/sysconfig/network start() { echo -n $"Starting memcached: " daemon /usr/local/bin/memcached -u daemon -d -m 4096 -l 10.10.10.220 -p 58728 echo } stop() { echo -n $"Shutting down memcached: " killproc memcached echo } [ -f /usr/local/bin/memcached ] || exit 0 # See how we were called. case "$1" in start) start ;; stop) stop ;; restart|reload) stop start ;; condrestart) stop start ;; *) echo $"Usage: $0 {start|stop|restart|reload|condrestart}" exit 1 esac exit 0
在上述指定目录创建了上述某一个脚本以后,就可以进行以下操作:
[root@crm ~]# chkconfig --add memcached
[root@crm ~]# chkconfig --level 235 memcached on
[root@crm ~]# chkconfig --list | grep mem
memcached 0:off 1:off 2:on 3:on 4:off 5:on 6:off
接下来,可以用以下命令启动与停止 memcached
/etc/rc.d/init.d/memcached start
/etc/rc.d/init.d/memcached stop
/etc/rc.d/init.d/memcached restart
如:
[root@crm ~]# /etc/rc.d/init.d/memcached restart
Shutting down memcached: [ OK ]
Starting memcached: [ OK ]
同时,还可以用:
service memcached start
这样的命令操作
然后,可以用ps命令查看进程信息。
[root@crm ~]# ps aux | grep mem
daemon 23781 0.0 0.2 13892 9860 ? Ss 16:51:00 /.../memcached -u daemon -d -m 1024 -l 172.16.0.106 -p 11211
以上两个脚本前一个脚本中,对网络进行检查。其它都是针对服务启动与停止的命令提示设置。
有人说,复杂的脚本并不好懂,自己也不会写,却想要更完善的,怎么办?
那就到网上找高手的。最好的捷径就是到对应的RPM包中去找。(如果直接用RPM包安装,这些事情都不用做了)
当然,memcached多数情况下都是编译安装,因为,很多时候都是找不到对应的版本。
脚本中 # chkconfig: - 55 45 运行级别这一列参数用的是 -,这样,是不在脚本中写死,可以通过 chkconfig --level 235 memcached on 灵活设置。
最后就是,目前仍不了解
. /etc/sysconfig/network
#[ ${NETWORKING} = "no" ] && exit 0
#[ -r /etc/sysconfig/dund ] || exit 0
#. /etc/sysconfig/dund
#[ -z "$DUNDARGS" ] && exit 0
这一段的详细含义。需要进一步学习!