How to take Kafka Topic Backup and restore?

[#1]

We need to take backup all the topics in Kafka to the file named in respective topic names and need to restore the topic as per user requirement. Note: This script needs to be run in the Kerberized environment.

kafkabackup.sh

Making required directories

monyear=`date | awk '{print $2$6}'`
dat=`date| awk '{print $2$3$6}'`
export BACKUPDIR=/root/backup/$monyear
mkdir -p $BACKUPDIR
mkdir -p $BACKUPDIR/$dat
cd $BACKUPSDIR
BKDIR=$BACKUPDIR/$dat

Log into Kafka

Get topics from Kafka Broker

kinit -kt /etc/security/keytabs/kafka.service.keytab kafka/node1.localdomaino@domain.co
cd /usr/hdp/current/kafka-broker/bin/
export KAFKA_CLIENT_KERBEROS_PARAMS="-Djava.security.auth.login.config=/etc/kafka/conf/kafka_client_jaas.conf"
./kafka-topics.sh --zookeeper adminnode.localdomain:2181 --list > $BKDIR/listtopics.txt

Remove if any mark of deletion topics exists

sed -i.bak '/deletion/d' $BKDIR/listtopics.txt

Starting kill script in parallel

bash checkandkill.sh& 

Reading the file contents for topics

for line in $(cat $BKDIR/listtopics.txt)
do
    echo $line
    ./test.sh --bootstrap-server node1.localdomain:6668 --topic $line  --consumer.config /home/kafka/conf.properties --from-beginning --security-protocol SASL_SSL > $BKDIR/$line
done

Delete empty files

/usr/bin/find . -size 0 -delete

Killing checkandkill daemon and exit

ps -ef |grep -i checkandkill.sh| grep -v grep | awk '{print $2}' | xargs kill
exit

When consumer runs, it constantly waits for messages to receive. We need to kill the process.

checkandkill.sh

sleep 0.5m
for line in $(cat /root/backup/listtopics.txt)
do
    echo $line
    sleep 1m
    ps -ef |grep -i $line| grep -v grep | awk '{print $2}' | xargs kill
done

Need your help to complete restoration script.

[#2]

Hi @Krishnaraj V!

I'm not sure if I get it, but are you trying to kill the consumer that you're creating right?

If so, then I'd try to grep the kafka.tools.ConsoleConsumer + the topic name.
Would be like:

sleep 0.5m
for line in $(cat /root/backup/listtopics.txt)
do    
	echo $line    
	sleep 1m    
	ps -ef | grep -i kafka.tools.ConsoleConsumer | grep -i $line| grep -v grep | awk '{print $2}' | xargs kill - 9
done

Hope this helps!