Shell脚本实现自动安装zookeeper

A：本脚本运行的机器，Linux RHEL6
B,C,D,...：待安装zookeeper cluster的机器, Linux RHEL6

首先在脚本运行的机器A上确定可以ssh无密码登录到待安装zk的机器B,C,D,...上，然后就可以在A上运行本脚本:

复制代码 代码如下:

$ ./install_zookeeper 

前提：

B, C, D机器必须配置好repo，本脚本使用的是cdh5的repo, 下面的内容保存到：/etc/yum.repos.d/cloudera-cdh5.repo:

复制代码 代码如下:

[cloudera-cdh5] 
# Packages for Cloudera's Distribution for Hadoop, Version 5, on RedHat or CentOS 6 x86_64 
name=Cloudera's Distribution for Hadoop, Version 5 
baseurl=http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/5/ 
gpgkey = http://archive.cloudera.com/cdh5/redhat/6/x86_64/cdh/RPM-GPG-KEY-cloudera     
gpgcheck = 1 
enabled  = 1 

自动安装脚本将自动在B,C,D机器上安装好zookeeper, 配置好相关配置文件。但没有启动它们。支持1,3,5,7个服务器。

复制代码 代码如下:

#!/bin/bash 

# 

# @file 

#   install_zookeeper.sh 

# 

# @date 

#   2014-12-21 

# 

# @author 

#   [email protected] 

# 

# @version 

#   0.0.1pre 

# 

# @usage 

#   ./install_zookeeper.sh 

################################################################################ 

 

#*********************************************************** 

# split_to_array 

#   split string into array 

#*********************************************************** 

function split_to_array() { 

    OLD_IFS="$IFS" 

    IFS="$2" 

    array=($1) 

    IFS="$OLD_IFS" 

} 

 

 

#*********************************************************** 

# install_zookeeper 

#   install zookeeper on 1, 3 or 5 servers 

# 

# Parameters: 

#   clientPort - the port at which the clients will connect to 

#   servers - varying arguments: 1, 3, 5, up to 7 

#     "zkServer:serverPort:appPort" 

#     zkServer - ipaddr of zookeeper server 

#     serverPort - communication port for zookeeper servers 

#     appPort - communication port between zookeeper with other applications 

# 

# Example: 

#   1) install_zookeeper 2181 zk1 zk2 zk3 

#   2) install_zookeeper 2181 192.168.122.201 192.168.122.202 192.168.122.203 

#   3) install_zookeeper "2181" "192.168.122.201:2888:3888" "192.168.122.202:2888:3888" "192.168.122.203:2888:3888" 

#   4) install_zookeeper "2181:/var/lib/zookeeper" "192.168.122.201:2888:3888" "192.168.122.202:2888:3888" "192.168.122.203:2888:3888" 

#*********************************************************** 

ERR_INVALID_ZK_SERVERS=1001 

 

function install_zookeeper() { 

    echo -e "<INFO> install zookeeper on cluster ..." 

    #chk_root 

 

    local ret clientPort dataDir len i ZOO_CFG server serverPort appPort destip destlogin 

 

    serverPort=2888 

    appPort=3888 

 

    # parse the first argument 

    split_to_array $1 ":" 

 

    # the port at which the clients will connect 

    clientPort=${array[0]} 

 

    # the directory where the snapshot is stored 

    dataDir="/var/lib/zookeeper" 

    if [ ${#array[*]} -eq 2 ]; then 

        dataDir=${array[1]} 

    fi 

 

    echo -e "<INFO> clientPort: $clientPort" 

    echo -e "<INFO> dataDir: $dataDir" 

 

    # zookeeper configure file 

    ZOO_CFG="/usr/lib/zookeeper/conf/zoo.cfg" 

 

    # get list of servers: args 

    shift 

    local argc=$# 

 

    if [ $argc -eq 1 -o $argc -eq 3 -o $argc -eq 5 -o $argc -eq 7 ]; then 

        echo -e "<INFO> zookeeper servers in cluster: [$argc]" 

    else 

        echo -e "<ERROR> invalid zookeeper servers: [$argc]" 

        exit $ERR_INVALID_ZK_SERVERS; 

    fi 

 

    local argv="$@" 

 

    OLD_IFS="$IFS" 

    IFS=" " 

    local args=($argv) 

    IFS="$OLD_IFS" 

 

    # array variable 

    local ipaddrs=() 

    local servers=() 

 

    local sid=0 

    for a in ${args[@]} 

    do 

        let sid++ 

 

        # check if server format is either of: 

        #   serverIP 

        # or: 

        #   serverIP:serverPort:appPort 

        split_to_array $a ":" 

        serverIP=${array[0]} 

 

        if [ ${#array[*]} -ne 3 ]; then 

            a="$serverIP:$serverPort:$appPort"; 

        fi 

 

        local server="server.$sid=$a" 

        servers[sid-1]=$server 

        echo $server 

 

        ipaddrs[sid-1]=$serverIP 

    done 

 

    # output array to one line string: echo ${servers[@]} 

    # get length of array 

    len=${#servers[*]} 

    i=0 

    while [ $i -lt $len ] 

    do 

        let sid=i+1 

        destip=${ipaddrs[$i]} 

        destlogin=root@$destip 

        echo -e "<INFO> configuring server.$sid: $destip ...\c" 

 

        ret=`ssh $destlogin "yum install -y zookeeper zookeeper-server && service zookeeper-server init --myid=$sid"` 

 

        ret=`ssh $destlogin "echo '#!{{[email protected]==>' >> $ZOO_CFG"` 

 

        for s in ${servers[*]} 

        do 

            ret=`ssh $destlogin "echo '$s' >> $ZOO_CFG"` 

        done 

 

        ret=`ssh $destlogin "echo '#!<[email protected]}}' >> $ZOO_CFG"` 

 

        echo -e "OK." 

 

        let i++ 

    done 

 

    echo "<INFO> zookeeper cluster installation completed successfully!" 

} 

 

#======================================================================= 

install_zookeeper "2181" "192.168.122.201" "192.168.122.202" "192.168.122.203" 

根据配置修改最后一行:

复制代码 代码如下:

install_zookeeper "2181" "192.168.122.201" "192.168.122.202" "192.168.122.203"

注意：需要把zk-cluster的每台机器上的防火墙停掉，再启动zookeeper:

复制代码 代码如下:

$ /usr/lib/zookeeper/bin/zkServer.sh start-foreground

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