我透過原始碼安裝 memcached 伺服器,並且可以為 1 個 memcached 伺服器實例安裝標準啟動腳本,但透過 google 嘗試多個腳本,無法找到一個可以管理多個 memcached 伺服器實例啟動時自動啟動的腳本。我已經嘗試過這兩個腳本,但都不起作用,service memcached start 只是返回到命令提示符,沒有啟動 memcached 伺服器實例
- lullabot.com/articles/installing-memcached-redhat-or-centos
- addmoremem.blogspot.com/2010/09/running-multiple-instances-of-memcached.html
但是這個 bash 腳本可以工作,但在啟動時不會啟動 memcached 實例?
#!/bin/sh
case "$1" in
start)
/usr/local/bin/memcached -d -m 16 -p 11211 -u nobody
/usr/local/bin/memcached -d -m 16 -p 11212 -u nobody
;;
stop) killall memcached
;;
esac
作業系統:Centos 5.5 64位元 Memcached = v1.4.5 Memcache = v2.2.5
任何人都可以向我指出一個有效的 /etc/init.d/ 啟動腳本來管理多個 memcached 伺服器嗎?謝謝
編輯:謝謝墊子,這是最終工作的程式碼
#!/bin/sh
# chkconfig: - 80 12
# description: The memcached daemon is a network memory cache service.
# processname: memcached
BIN=/usr/local/bin/memcached
USER=nobody
CON=2048
THREADS=4
$BIN -d -m 16 -p 11211 -c $CON -t $THREADS -u $USER
$BIN -d -m 16 -p 11212 -c $CON -t $THREADS -u $USER
case "$1" in
start)
$BIN -d -m 16 -p 11211 -c $CON -t $THREADS -u $USER
$BIN -d -m 16 -p 11212 -c $CON -t $THREADS -u $USER
;;
stop) killall $BIN
;;
esac
答案1
若要為 chkconfig 新增服務,通常需要在 shell 腳本的 shebang 下方新增一些特殊註解:
#!/bin/sh
# chkconfig: - 55 45
# description: The memcached daemon is a network memory cache service.
# processname: memcached
將這些行加入 /etc/init.d/memcached 後,您可以發出
chkconfig --add memcached
當然,進程可以啟動其他運行級別,以便檢查您是否會發出
chkconfig --list | grep "memcached"
memcached 的常見運行等級是
chkconfig --level 345 memcached on
答案2
這是我用來啟動多個 memcached 實例的腳本。關鍵點是我使用關聯數組來啟動所有或僅一個特定實例:
#! /usr/local/bash4/bin/bash
#
# chkconfig: - 55 45
# description: The memcached daemon is a network memory cache service.
# processname: memcached
# config: /etc/sysconfig/memcached
# Standard LSB functions
#. /lib/lsb/init-functions
# Source function library.
. /etc/init.d/functions
if [ -f /etc/sysconfig/memcached ];then
. /etc/sysconfig/memcached
fi
# Check that networking is up.
. /etc/sysconfig/network
if [ "$NETWORKING" = "no" ]
then
exit 0
fi
typeset -A PIDS
typeset -A MEMORYS
typeset -A FACTORS
typeset -A INSTANCES
PORTS="11216 11217"
USER=memcached
basedir="/usr/local/memcached"
MAXCONN=1024
OPTIONS=""
INSTANCES=([11216]="session" [11217]="userdata")
PIDS=([11216]="$basedir/var/run/sohaphimdetails.pid" [11217]="$basedir/var/run/sohamuzik-top.pid")
MEMORYS=([11216]="1024" [11217]="2048")
FACTORS=([11216]="1.25" [11217]="1.125")
RETVAL=0
prog="memcached"
cmd="/usr/local/memcached/bin/memcached"
user="memcached"
ip="192.168.6.66"
peer="192.168.6.28"
max_conn=2048
max_memory=512
threads=8
function start()
{
port="$1"
if [ `ps -ef | grep "$cmd" | grep -c $port` -ge 1 ]; then
action $"Starting the memcached server on port '$port'... " /bin/false
else
if [ ! -f $basedir/var/log/${INSTANCES[$port]}.log ]; then
touch $basedir/var/log/${INSTANCES[$port]}.log
/bin/chown memcached:memcached $basedir/var/log/${INSTANCES[$port]}.log
fi
$cmd -d -u $user -l $ip -c $max_conn -t $threads -m ${MEMORYS[$port]} -p $port -P $basedir/var/run/${INSTANCES[$port]}.pid -f ${FACTORS[$port]} -x $peer -X `expr $port '*' 10` -vv > $basedir/var/log/${INSTANCES[$port]}.log 2>&1
action $"Starting the memcached server on port '$port'... " /bin/true
fi
}
function stop()
{
port="$1"
if [ `ps -ef | grep "$cmd" | grep -c $port` -eq 0 ]; then
action $"Stopping the memcached server on port '$port'... " /bin/false
else
kill -TERM `ps -ef | grep "$cmd" | grep $port | grep -v grep | awk '{ print $2 }'`
action $"Stopping the memcached server on port '$port'... " /bin/true
fi
}
case "$1" in
start)
if [ -n "$2" ]; then
start $2
else
for port in $PORTS; do
start $port
done
fi
;;
stop)
if [ -n "$2" ]; then
port="$2"
stop $port
else
killproc $prog
fi
;;
restart)
if [ -n "$2" ]; then
stop $2
start $2
else
for port in $PORTS; do
stop $port
start $port
done
fi
;;
*)
printf 'Usage: %s {start|stop|restart} <port>\n' "$prog"
exit 1
;;
esac
PS:我用過重新快取用於複製。
答案3
由於該腳本正在運行,我假設它沒有從 /etc/rc.d 鏈接,因此它不會在啟動時執行。假設您的啟動腳本名稱為 /etc/init.d/memcached 您應該執行
chkconfig --add memcached
將其新增至要在啟動時執行的腳本清單中。