Kafka

Apache Kafka in Hogarama

This page is intended to gather some information for Kafka in Hogarama. It is for internal use of the Learning Friday Kafka team.

Connect to OpenShift Kafka from local host

See https://strimzi.io/blog/2019/04/30/accessing-kafka-part-3/ for explanation.

oc login XXXXXXX
oc project hogarama
oc extract secret/gepardec-kafka-cluster-cluster-ca-cert --keys=ca.crt --to=- > ca.crt
keytool -import -trustcacerts -alias root -file ca.crt -keystore kafka-truststore.jks -storepass password -noprompt
kafka-console-consumer --bootstrap-server https://gepardec-kafka-cluster-kafka-bootstrap-hogarama.apps.steppe.gepaplexx.com:443 --topic habarama --consumer-property security.protocol=SSL --consumer-property ssl.truststore.password=password --consumer-property ssl.truststore.location=./kafka-truststore.jks --from-beginning

For kafka-topic you can create a file conf:

cat > conf <<EOF
security.protocol=SSL
ssl.truststore.password=password
ssl.truststore.location=./kafka-truststore.jks
EOF

and use this e.g with

kafka-topics --bootstrap-server https://gepardec-kafka-cluster-kafka-bootstrap-kafka.apps.p.aws.ocp.gepardec.com:443  --command-config conf  --list

Local Testing (Linux, MAC)

Start local Postgres DB and MongoDB:

docker run -d  --name my-postgres -p 5432:5432 -e POSTGRES_DB=management -e POSTGRES_USER=hogajama -e POSTGRES_PASSWORD=changepassword postgres
docker run -d  --name my-mongo -p 27017:27017  -e MONGODB_USERNAME=hogajama -e MONGODB_PASSWORD=changepassword -e MONGODB_DATABASE=hogajamadb -e ALLOW_EMPTY_PASSWORD=YES bitnami/mongodb:latest

---

Start Kafka depending on your local setup:

Installed Kafka

zookeeper-server-start config/zookeeper.properties &
sleep 10
kafka-server-start config/server.properties &

Kafka with docker-compose

see Local Kafka with Docker

Setup local Wildfly

Clone JBoss Setup Scripts and setup JBSS environment (adapt):

git clone [email protected]:Gepardec/JBSS.git
./JBSS/bin/setup.sh -i hogajama -r wildfly-23.0.1.Final
echo export ENV_FILE=`pwd`/Hogarama/codereadyworkspace/hogarama_local.env >> ~/.hogajamarc

Configure your local Wildfly

cd  Hogarama/Hogajama/configuration/local_configuration/
hogajama configure .

Use hogajama help to find out more

You may stop the unused MDB to prevent warnings in jboss-cli: /deployment=hogajama-rs-0.0.1-SNAPSHOT.war/subsystem=ejb3/message-driven-bean=WateringMDB:stop-delivery

Run Test-Script

Hogarama/Hogajama/raspberry-pi-mocks/raspberry-pi-mocks-cli/mock-cli-kafka.sh

Turn off security

If you have no Keycloak available or you don't want to use security in a development environment you can turn off security in hogarama_local.env with the feature NOSECURITY:

FEATURES="DEPLOY NOSECURITY"