zookeeper-setup.txt

sudo apt-get update && sudo apt-get -y install wget ca-certificates zip net-tools tar netcat
sudo apt-get -y install default-jdk
java -version
sudo sysctl vm.swappiness=1
echo "vm.swappiness=1"| sudo tee --append /etc/sysctl.conf
wget http://mirrors.fibergrid.in/apache/kafka/2.0.0/kafka_2.12-2.0.0.tgz
tar -xvzf kafka_2.12-2.0.0.tgz

create Zookeeper as service

sudo vi /etc/init.d/zookeeper

#Script for making zookeeper as a daemon

#!/bin/bash
DAEMON_PATH=/home/phyadavi/kafka_2.12-2.0.0/bin
DAEMON_NAME=zookeeper
PATH=$PATH:$DAEMON_PATH

case "$1" in
  start)
        #start daemon
        pid=$(ps ax|grep -i 'org.apache.zookeeper' | grep -v grep | awk '{print $1}')
        if [ -n "$pid" ]
         then
           echo "Zookeeper is already RUNNING";
        else
          echo "Starting $DAEMON_NAME";
          $DAEMON_PATH/zookeeper-server-start.sh -daemon /home/phyadavi/kafka_2.12-2.0.0/config/zookeeper.properties
        fi
        ;;
   stop)
        #stop daemon
        echo "Shutting down $DAEMON_NAME";
        $DAEMON_PATH/zookeeper-server-stop.sh
        ;;
   restart)
         $0 stop
         sleep 2
         $0 start
         ;;
   status)
         pid=$(ps ax | grep -i 'org.apache.zookeeper' | grep -v grep |awk '{print $1}')
         if [ -n "$pid" ]
           then
           echo "Zookeeper is RUNNING PID: $pid"
         else
           echo "Zookeeper is not RUNNING"
         fi
         ;;
   *)
        echo "usage: $0 (start|stop|restart|status)"
esac

exit 0


sudo chmod +x /etc/init.d/zookeeper
ls -l /etc/init.d/|grep zookeeper
sudo update-rc.d zookeeper defaults
sudo mkdir -p /data/zookeeper
sudo echo "1" > /data/zookeeper/myid
cd kafka_2.12-2.0.0/config/
rm zookeeper.properties
touch zookeeper.properties

dataDir=/data/zookeeper
clientPort=2181
maxClientCnxns=0
tickTime=2000
initLimit=10
syncLimit=5
server.1=zookeeper-1:2888:3888
server.2=zookeeper-2:2888:3888
server.3=zookeeper-3:2888:3888

sudo service zookeeper start


#to check if the connectivity is working between the zookeeper instances use the commands below
nc -vz zookeeper-2 2181
echo "ruok" | nc localhost 2181 ; echo
echo "stat" | nc localhost 2181 ; echo

#Launching zookeeper shell
bin/zookeeper-shell.sh localhost:2181
ls /
create /node-1 "test"
get /node-1 (getting info of the node)
create /zoo-node/child-node "new child data" (creating node)
set /zoo-node/child-node "latest child data" (updating existing data)
rmr /zoo-node