Amazon MSK (Kafka)

This wiki documents how to connect Pinot deployed in Amazon EKS to Amazon Managed Kafka.

Prerequisite

Follow this AWS Quickstart Wiki to run Pinot on Amazon EKS.

Create an Amazon MSK Cluster

1. Go to MSK Landing Page to create a Kafka Cluster.

1. Click Create. b

2. Once the cluster is created, click View client information to see the Zookeeper and Kafka Broker list.

Sample Client Information

Connect to MSK

Config SecurityGroup

Until now, the MSK cluster is still not accessible, you can follow this Wiki to create an EC2 instance to connect to it for topic creation, run console producer and consumer.

In order to connect MSK to EKS, we need to allow the traffic could go through each other.

This is configured through Amazon VPC Page.

1. Record the Amazon MSK SecurityGroup from the Cluster page, in the above demo, it's sg-01e7ab1320a77f1a9.

2. Open Amazon VPC Page, click on SecurityGroups on left bar. Find the EKS Security group: eksctl-${PINOT_EKS_CLUSTER}-cluster/ClusterSharedNodeSecurityGroup.

1. In SecurityGroup, click on MSK SecurityGroup (sg-01e7ab1320a77f1a9), then Click on Edit Rules , then add above ClusterSharedNodeSecurityGroup (sg-0402b59d7e440f8d1) to it.

1. Click EKS Security Group ClusterSharedNodeSecurityGroup (sg-0402b59d7e440f8d1), add In bound Rule for MSK Security Group (sg-01e7ab1320a77f1a9).

Now, EKS cluster should be able to talk to Amazon MSK.

Create Kafka topic

To run below commands, ensure you set two environment variable with ZOOKEEPER_CONNECT_STRING and BROKER_LIST_STRING (Use plaintext) from Amazon MSK client information, and replace the Variables accordingly.

E.g.

ZOOKEEPER_CONNECT_STRING="z-3.pinot-quickstart-msk-d.ky727f.c3.kafka.us-west-2.amazonaws.com:2181,z-1.pinot-quickstart-msk-d.ky727f.c3.kafka.us-west-2.amazonaws.com:2181,z-2.pinot-quickstart-msk-d.ky727f.c3.kafka.us-west-2.amazonaws.com:2181"
BROKER_LIST_STRING="b-1.pinot-quickstart-msk-d.ky727f.c3.kafka.us-west-2.amazonaws.com:9092,b-2.pinot-quickstart-msk-d.ky727f.c3.kafka.us-west-2.amazonaws.com:9092"

You can log into one EKS node or container and run below command to create a topic.

E.g. Enter into Pinot controller container:

kubectl exec -it pod/pinot-controller-0  -n pinot-quickstart bash

Then install wget then download Kafka binary.

apt-get update
apt-get install wget -y
wget https://archive.apache.org/dist/kafka/2.2.1/kafka_2.12-2.2.1.tgz
tar -xzf kafka_2.12-2.2.1.tgz
cd kafka_2.12-2.2.1

Create a Kafka topic:

bin/kafka-topics.sh \
  --zookeeper ${ZOOKEEPER_CONNECT_STRING} \
  --create \
  --topic pullRequestMergedEventsAwsMskDemo \
  --replication-factor 1 \
  --partitions 1

Topic creation succeeds with below message:

Created topic "pullRequestMergedEventsAwsMskDemo".

Write sample data into Kafka

Once topic is created, we can start a simple application to produce to it.

You can download below yaml file, then replace:

• ${ZOOKEEPER_CONNECT_STRING} -> MSK Zookeeper String

• ${BROKER_LIST_STRING} -> MSK Plaintext Broker String in the deployment

• ${GITHUB_PERSONAL_ACCESS_TOKEN} -> A personal Github Personal Access Token generated from here, grant all read permissions to it. Here is the source code to generate Github Events.

And apply the YAML file by.

kubectl apply -f github-events-aws-msk-demo.yaml

Once the pod is up, you can verify by running a console consumer to read from it.

bin/kafka-console-consumer.sh \
  --bootstrap-server ${BROKER_LIST_STRING} \
  --topic pullRequestMergedEventsAwsMskDemo

Create a Pinot table

This step is relatively easy.

Since we already put table creation request into the ConfigMap, we can just enter into pinot-github-events-data-into-msk-kafka pod to execute the command.

• Check if the pod is running:

kubectl get pod -n pinot-quickstart  |grep pinot-github-events-data-into-msk-kafka

Sample output:

pinot-github-events-data-into-msk-kafka-68948fb4cd-rrzlf   1/1     Running     0          14m

• Enter into the pod

podname=`kubectl get pod -n pinot-quickstart  |grep pinot-github-events-data-into-msk-kafka|awk '{print $1}'`
kubectl exec -it ${podname} -n pinot-quickstart bash

• Create Table

bin/pinot-admin.sh AddTable \
  -controllerHost pinot-controller \
  -tableConfigFile /var/pinot/examples/pullRequestMergedEventsAwsMskDemo_realtime_table_config.json \
  -schemaFile /var/pinot/examples/pullRequestMergedEventsAwsMskDemo_schema.json \
  -exec

Sample output:

Executing command: AddTable -tableConfigFile /var/pinot/examples/pullRequestMergedEventsAwsMskDemo_realtime_table_config.json -schemaFile /var/pinot/examples/pullRequestMergedEventsAwsMskDemo_schema.json -controllerHost pinot-controller -controllerPort 9000 -exec
Sending request: http://pinot-controller:9000/schemas to controller: pinot-controller-0.pinot-controller-headless.pinot-quickstart.svc.cluster.local, version: Unknown
{"status":"Table pullRequestMergedEventsAwsMskDemo_REALTIME succesfully added"}

• Then you can open Pinot Query Console to browse the data