Installation Script for Apache Zookeeper-3.3.5 on Linux

One of my previous blogs describes how to setup a Zookeeper cluster manually. Here's a quick fix: an installation script for the same. You need to run the following script (after storing the content in a .sh file) on your machine and you can install a zookeeper cluster on a set of remote machines. All you need as prerequisite on those machines is the zookeeper-3.3.5 setup at a common location. You can also use this script for other versions, with a bit of modification to the script(replacing the version used in the script to yours. It should have not been hard coded, I know.. My bad).

#!/bin/bash zkServerEntryPart1="server."; zkServerEntryPart2="=zoo"; zkServerEntryPart3=":2888:3888NEW_LINE"; zkServerEntry=""; # Local FS Setup location echo "Enter the path of the folder in which the zookeeper setup is stored. For example '/home/abc/setups'" read -e setupsLocation # Directory Name echo "Enter the directory path where zookeeper is to be installed : " read -e zookeeperSetupLocation # Read the number of zookeeper servers echo "Enter the number of machines in the zookeeper cluster : "; read -e n; # Read the zookeeper server details for ((  i = 1 ;  i <= n;  i++  )) do # obtain the zookeeper server ips of all machines in the cluster echo "Enter the IP of zookeeper machine $i:" read -e zookeeperServer; zookeeperServerIPList[i]=$zookeeperServer temp=$zkServerEntryPart1""$i""$zkServerEntryPart2""$i""$zkServerEntryPart3; zkServerEntry=$zkServerEntry""$temp; # obtain the usernames for all the zookeeper servers echo "Enter the username of machine ${zookeeperServerIPList[i]}" read -e username userNameList[i]=$username done # Copy the setup to all the storm machines for ((  i = 1 ;  i <= n;  i++  )) do echo "Enter the data directory location of zookeeper for the machine ${zookeeperServerIPList[i]}" read -e dataDir       # create the required folders on the machines ssh -t ${userNameList[i]}@${zookeeperServerIPList[i]} "if [ ! -d $zookeeperSetupLocation ]; then sudo mkdir $zookeeperSetupLocation; sudo chown -R ${userNameList[i]}: $zookeeperSetupLocation; fi if [ ! -d $dataDir ]; then sudo mkdir $dataDir; sudo chown -R ${userNameList[i]}: $dataDir; fi" # copy the zookeeper setup at the specified location on the machines scp -r -q $setupsLocation/zookeeper-3.3.5 ${userNameList[i]}@${zookeeperServerIPList[i]}:$zookeeperSetupLocation/zookeeper-3.3.5 # create and configure the 'zoo.cfg' and 'myid' files ssh -t ${userNameList[i]}@${zookeeperServerIPList[i]} "touch $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; echo -e "dataDir=$dataDir" >> $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; echo -e "syncLimit=2" >> $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; echo -e "initLimit=5" >> $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; echo -e "clientPort=2181" >> $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; echo  "$zkServerEntry" >> $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg; sed -i 's/NEW_LINE/\n/g' $zookeeperSetupLocation/zookeeper-3.3.5/conf/zoo.cfg touch $dataDir/myid;                            echo -e $i >> $dataDir/myid;" # update the /etc/hosts file hostFileEntry=${zookeeperServerIPList[i]}" zoo"$i; for ((  j = 1 ;  j <= n;  j++  )) do ssh -t ${userNameList[j]}@${zookeeperServerIPList[j]} "sudo cp /etc/hosts /etc/hosts.bak; sudo cp /etc/hosts /etc/hosts1; sudo chmod 777 /etc/hosts1; sudo echo -e "$hostFileEntry" >> /etc/hosts1; sudo mv /etc/hosts1 /etc/hosts;" done done

Hope it helped. My next blog post is about a small script to start-up the installed zookeeper cluster.