shell脚本部署zookeeper-3.4.10 [含注释]

#!/bin/bash
base_path=$(cd `dirname $0`; pwd)
source ${base_path}/conf/config
function install_java () {
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  # 判断需要安装zookeeper的节点是否已有java环境 [zookeeper的启动依赖java环境]
  # 返回非零状态则表示java环境不存在，并安装java环境
  # $USER 为环境变量，输出的值为当前用户的名称 [建议使用普通用户]
  ssh $USER@${zk_array[i]} 'java -version' &> /dev/null
  if [[ "$?" -ne '0' ]];then
    ssh $USER@${zk_array[i]} "mkdir -p ${java_path}"
    # 如果准备的java安装包名称不是 jdk.tar.gz ，可以重命名成 jdk.tar.gz ，或者修改 jdk.tar.gz 为当前安装包的名称
    scp ${base_path}/package/jdk.tar.gz $USER@${zk_array[i]}:${pack_path}/
    # 如果上一行有修改，此处的 jdk.tar.gz 也需要修改
    ssh $USER@${zk_array[i]} "cd ${pack_path} && tar xf jdk.tar.gz -C ${java_path} && rm -f jdk.tar.gz"
    ssh $USER@${zk_array[i]} "echo \"export JAVA_HOME=${java_path}\" >> $HOME/.bashrc"
    ssh $USER@${zk_array[i]} "echo 'export PATH=\$PATH:\$JAVA_HOME/bin' >> $HOME/.bashrc"
    ssh $USER@${zk_array[i]} "echo 'source /etc/profile' >> $HOME/.bashrc"
  fi
done
}
function install_zk () {
# 将 conf 目录下的 zoo_template.cfg 文件重定向成 zoo_sample.cfg 文件，保持配置文件的干净
# zoo_template.cfg 文件需要提前准备好
cat ${base_path}/conf/zoo_template.cfg > ${base_path}/conf/zoo_sample.cfg
# 定义一个变量conut，赋值为0，因为zookeeper是需要用到myid的，至于为什么不从1开始，程序员都懂的
count=0
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  # 每次循环，count的值则会加1
  let count++
  echo "server.${count}=${zk_array[i]}:2888:3888" >> ${base_path}/conf/zoo_sample.cfg
done
# 根据 conf 目录下的 config 文件来修改 zoo_sample.cfg 文件，以此来生成zookeeper的配置文件
# 这里只修改了端口和数据目录，其他的可以自行使用增加sed命令即可
sed -i "/clientPort/s/=.*/=${zk_clinet_port}/" ${base_path}/conf/zoo_sample.cfg
sed -i "/dataDir/s#=.*#=${zk_data_dir}#" ${base_path}/conf/zoo_sample.cfg
# 开始安装zookeeper
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  ssh $USER@${zk_array[i]} "mkdir ${zk_path}"
  scp ${base_path}/package/${pack_name}.tar.gz $USER@${zk_array[i]}:${pack_path}/
  ssh $USER@${zk_array[i]} "cd ${pack_path} && tar xf ${pack_name}.tar.gz -C ${zk_path} && rm -f ${pack_name}.tar.gz"
  ssh $USER@${zk_array[i]} "mkdir ${zk_data_dir}"
  scp ${base_path}/conf/zoo_sample.cfg $USER@${zk_array[i]}:${zk_path}/${pack_name}/conf/zoo.cfg
done
# 生成myid
id_num=0
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  let id_num++
  ssh $USER@${zk_array[i]} "echo ${id_num} > ${zk_data_dir}/myid"
done
}
# 启动zookeeper
function start_zk () {
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  ssh $USER@${zk_array[i]} "${zk_path}/${pack_name}/bin/zkServer.sh restart"
done
}
# 检查zookeeper的状态
function status_zk () {
# 检查每个节点的zookeeper状态
for (( i=0; i<${#zk_array[@]}; i++ ))
do
  # 利用zkServer.sh status来查看zookeeper的状态，grep -o 是只过滤Mode这个关键字，存在的情况下，只会返回Mode
  local check_status=$(ssh $USER@${zk_array[i]} "${zk_path}/${pack_name}/bin/zkServer.sh status | grep -o Mode")
  # 通过while死循环加上字符串比较来等待zookeeper服务的状态 [依赖java环境的服务，启动普遍偏慢]
  while [[ x"${check_status}" != x"Mode" ]]
  do
    sleep 10
    # 重新赋值来刷新变量值
    local check_status=$(ssh $USER@${zk_array[i]} "${zk_path}/${pack_name}/bin/zkServer.sh status | grep -o Mode") 
  done
done
if [[ $? -eq 0 ]];then
  echo "zookeeper cluster install success"
else
  echo "zookeeper cluster install fail"
  exit 2
fi
}
install_java
install_zk
start_zk
status_zk

#!/bin/bash
base_path=$(cd `dirname $0`; pwd)
# 此处的ip为zookeeper节点ip
zk_hosts='
192.168.72.107
192.168.72.108
192.168.72.109
'
# 这个是格式转换，将上面的变量转换成数组的格式
zk_array=($(printf "%q\n" ${zk_hosts}))
# 一般zookeeper的安装包名称格式是zookeeper-版本，这里只需要和安装包的一样就可以了，去掉后缀
pack_name='zookeeper-3.4.10'
# java和zookeeper安装的目录 [注意查看磁盘空间大小，以实际情况来修改]
pack_path='/approot1'
java_path="${pack_path}/jdk"
zk_path="${pack_path}/zookeeper"
zk_data_dir="${zk_path}/${pack_name}/data"
# zookeeper的默认端口是2181，根据实际需求修改
zk_clinet_port=7181

# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial 
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between 
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just 
# example sakes.
dataDir=/tmp/zookeeper-3.4.10/data
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the 
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1