zookeeper 脚本 zkServer.sh zkCli.sh zkCleanup.sh zkEnv.sh 详解(三)

zkCli.sh 脚本用的也比较多 我们又是需要登录到服务端查看一些节点的信息,通过这个脚本是比较直接和快速的

#!/bin/sh

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


#
# This script cleans up old transaction logs and snapshots
#


#
# If this scripted is run out of /usr/bin or some other system bin directory
# it should be linked to and not copied. Things like java jar files are found
# relative to the canonical path of this script.
#


# Only follow symlinks if readlink supports it
if readlink -f "$0" > /dev/null 2>&1
then
  ZOOBIN=`readlink -f "$0"`
else
  ZOOBIN="$0"
fi
ZOOBINDIR=`dirname "$ZOOBIN"`


. "$ZOOBINDIR"/zkEnv.sh


$JAVA "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
     -cp "$CLASSPATH" $CLIENT_JVMFLAGS $JVMFLAGS \
     org.apache.zookeeper.ZooKeeperMain "$@"

首先获取该脚本文件的绝对路径ZOOBIN=`readlink -f "$0"`
然后获得该脚本所在的目录ZOOBINDIR=`dirname "$ZOOBIN"` 
执行配置zookeeper运行时所需要的环境变量脚本. "$ZOOBINDIR"/zkEnv.sh

最后通过java命令来运行zookeeper客户端代码入口