Kafka dynamic configuration

#!/usr/bin/env bash

TAG="kafka-brokers-demo"

sudo yum install -y jq
sudo yum install -y wget
sudo yum install -y java
cd ~
wget "http://archive.apache.org/dist/kafka/2.1.0/kafka_2.11-2.1.0.tgz"
tar -xvf kafka_2.11-2.1.0.tgz
cd kafka_2.11-2.1.0

MY_INST_ID=$(curl http://169.254.169.254/latest/meta-data/instance-id)

MY_IP="UNDEFINED"

ZOOKEEPER_NODES=""
ZOOKEEPER_CONNECT=""
COUNTER=1
ASSIGNED=0

eips=$(aws ec2 describe-addresses --region eu-central-1 --filter Name=tag-value,Values=$TAG)
for eip in $(echo "${eips}" | jq -rc '.Addresses[]'); do
    INST_ID=$(echo $eip | jq -r '.InstanceId')
    ALLOC=$(echo $eip | jq -r '.AllocationId')
    IP=$(echo $eip | jq -r '.PublicIp')
    IP_INT=$(echo $IP | tr . '\n' | awk '{s = s*256 + $1} END{print s}')
    if [[ $INST_ID == 'null' ]] && [[ $ASSIGNED == 0 ]]; then
        ASSIGNATION_FAILED=0
        aws ec2 associate-address --region eu-central-1 --allocation-id $ALLOC --instance-id $MY_INST_ID || ASSIGNATION_FAILED=1
        if [[ $ASSIGNATION_FAILED == 0 ]]; then
            ASSIGNED=1
            MY_IP=$IP
            IP='0.0.0.0'
            echo "Assigned $IP"
        fi
    fi
    
    ZOOKEEPER_NODES=$ZOOKEEPER_NODES"server.$IP_INT=$IP:2888:3888"$'\n'
    if [ $COUNTER == 1 ]; then
        ZOOKEEPER_CONNECT="$IP:2181"
    else
        ZOOKEEPER_CONNECT="$ZOOKEEPER_CONNECT,$IP:2181"
    fi
    COUNTER=$(($COUNTER+1))
done

MY_ZOOKEEPER_ID=$(echo $MY_IP | tr . '\n' | awk '{s = s*256 + $1} END{print s}') # set to /tmp/zookeeper/myid

# Update configuration with concatenated strings