zookeeper在linux自启动

要在Linux系统中设置Zookeeper自启动，可以按照以下步骤进行操作：
1. 将Zookeeper安装目录下的conf目录中的zoo_sample.cfg文件复制一份并重命名为zoo.cfg。
2. 修改zoo.cfg文件中的dataDir和clientPort参数，分别指定Zookeeper数据存储目录和客户端连接端口。
3. 在/etc/init.d/目录下创建zookeeper文件，并将以下脚本复制到文件中：

#!/bin/sh
#
# zookeeper    Startup script for the Apache ZooKeeper server
#
# chkconfig: - 80 20
# description: ZooKeeper is a distributed coordination service
#              that helps manage and synchronize distributed systems.

### BEGIN INIT INFO
# Provides:          zookeeper
# Required-Start:    $network $remote_fs $named
# Required-Stop:     $network $remote_fs $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Apache ZooKeeper server
# Description:       Apache ZooKeeper is a distributed coordination service
                    that helps manage and synchronize distributed systems.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

ZOO_BIN="/usr/local/java/zookeeper-3.4.5/bin"
ZOO_DATA_DIR="/var/lib/zookeeper"
ZOO_LOG_DIR="/var/log/zookeeper"
ZOO_CONF="/usr/local/java/zookeeper-3.4.5/conf/zoo.cfg"
ZOO_USER="zookeeper"

RETVAL=0

start() {
    echo -n $"Starting ZooKeeper: "
    daemon --user ${ZOO_USER} ${ZOO_BIN}/zkServer.sh start ${ZOO_CONF} > /dev/null 2>&1
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch /var/lock/subsys/zookeeper
    return $RETVAL
}

stop() {
    echo -n $"Stopping ZooKeeper: "
    daemon --user ${ZOO_USER} ${ZOO_BIN}/zkServer.sh stop ${ZOO_CONF} > /dev/null 2>&1
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/zookeeper
    return $RETVAL
}

restart() {
    stop
    start
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        restart
        ;;
    *)
        echo $"Usage: $0 {start|stop|restart}"
        RETVAL=2
esac

exit $RETVAL

4. 修改zookeeper文件中的ZOO_BIN、ZOO_DATA_DIR、ZOO_LOG_DIR和ZOO_CONF参数，分别指定Zookeeper安装目录、数据存储目录、日志存储目录和配置文件路径。
5. 将zookeeper文件设置为可执行文件并添加到系统服务中：

chmod +x /etc/init.d/zookeeper
chkconfig --add zookeeper

现在，Zookeeper就会在Linux系统启动时自动启动了。