Chapter 3. Starting the services Using Debezium requires AMQ Streams with Kafka and Kafka Connect, a database, and the Debezium connector service. To run the services for this tutorial, you must: Deploy a MySQL database Deploy Kafka Connect with the Debezium MySQL Connector plug-in Verify the connector deployment 3.1. Deploying a MySQL database Deploy a MySQL database server that includes an example inventory database that includes several tables that are pre-populated with data. The Debezium MySQL connector will capture changes that occur in the sample tables and transmit the change event records to an Apache Kafka topic. Procedure Start a MySQL database by running the following command, which starts a MySQL database server configured with an example inventory database: USD oc new-app -l app=mysql --name=mysql quay.io/debezium/example-mysql:latest Configure credentials for the MySQL database by running the following command, which updates the deployment configuration for the MySQL database to add the user name and password: USD oc set env deployment/mysql MYSQL_ROOT_PASSWORD=debezium MYSQL_USER=mysqluser MYSQL_PASSWORD=mysqlpw Verify that the MySQL database is running by invoking the following command, which is followed by the output that shows that the MySQL database is running, and that the pod is ready: USD oc get pods -l app=mysql NAME READY STATUS RESTARTS AGE mysql-1-2gzx5 1/1 Running 1 23s Open a new terminal and log into the sample inventory database. This command opens a MySQL command line client in the pod that is running the MySQL database. The client uses the user name and password that you previously configured: USD oc exec mysql-1-2gzx5 -it -- mysql -u mysqluser -pmysqlpw inventory mysql: [Warning] Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.29-log MySQL Community Server (GPL)

Commands:
oc new-app -l app=mysql --name=mysql quay.io/debezium/example-mysql:latest
oc set env deployment/mysql MYSQL_ROOT_PASSWORD=debezium MYSQL_USER=mysqluser MYSQL_PASSWORD=mysqlpw
oc get pods -l app=mysql NAME READY STATUS RESTARTS AGE mysql-1-2gzx5 1/1 Running 1 23s
oc exec mysql-1-2gzx5 -it -- mysql -u mysqluser -pmysqlpw inventory mysql: [Warning] Using a password on the command line interface can be insecure. Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.7.29-log MySQL Community Server (GPL) Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
mysql> show tables; +---------------------+ | Tables_in_inventory | +---------------------+ | addresses | | customers | | geom | | orders | | products | | products_on_hand | +---------------------+ 6 rows in set (0.00 sec)
mysql> select * from customers; +------+------------+-----------+-----------------------+ | id | first_name | last_name | email | +------+------------+-----------+-----------------------+ | 1001 | Sally | Thomas | sally.thomas@acme.com | | 1002 | George | Bailey | gbailey@foobar.com | | 1003 | Edward | Walker | ed@walker.com | | 1004 | Anne | Kretchmar | annek@noanswer.org | +------+------------+-----------+-----------------------+ 4 rows in set (0.00 sec)
apiVersion: kafka.strimzi.io/v1beta2 kind: KafkaConnect metadata: name: my-connect-cluster annotations: strimzi.io/use-connector-resources: "true" 1 spec: replicas: 1 version: 3.5.0 build: 2 output: 3 type: imagestream 4 image: debezium-streams-connect:latest plugins: 5 - name: debezium-connector-mysql artifacts: - type: zip 6 url: https://maven.repository.redhat.com/ga/io/debezium/debezium-connector-mysql/2.3.4.Final-redhat-00001/debezium-connector-mysql-2.3.4.Final-redhat-00001-plugin.zip 7 bootstrapServers: my-cluster-kafka-bootstrap:9093
create -f dbz-connect.yaml
apiVersion: kafka.strimzi.io/v1beta2 kind: KafkaConnector metadata: labels: strimzi.io/cluster: my-connect-cluster name: inventory-connector 1 spec: class: io.debezium.connector.mysql.MySqlConnector 2 tasksMax: 1 3 config: 4 database.hostname: mysql 5 database.port: 3306 6 database.user: debezium 7 database.password: dbz 8 database.server.id: 184054 topic.prefix: dbserver1 9 table.include.list: inventory.* 10 schema.history.internal.kafka.bootstrap.servers: 'my-cluster-kafka-bootstrap:9092' 11 schema.history.internal.kafka.topic: schema-changes.inventory 12
create -n <namespace> -f <kafkaConnector> .yaml
create -n debezium -f mysql-inventory-connector.yaml
describe KafkaConnector <connector-name> -n <project>
describe KafkaConnector inventory-connector -n debezium
Name: inventory-connector Namespace: debezium Labels: strimzi.io/cluster=my-connect-cluster Annotations: <none> API Version: kafka.strimzi.io/v1beta2 Kind: KafkaConnector Status: Conditions: Last Transition Time: 2021-12-08T17:41:34.897153Z Status: True Type: Ready Connector Status: Connector: State: RUNNING worker_id: 10.131.1.124:8083 Name: inventory-connector Tasks: Id: 0 State: RUNNING worker_id: 10.131.1.124:8083 Type: source Observed Generation: 1 Tasks Max: 1 Topics: dbserver1 dbserver1.inventory.addresses dbserver1.inventory.customers dbserver1.inventory.geom dbserver1.inventory.orders dbserver1.inventory.products dbserver1.inventory.products_on_hand Events: <none>
get kafkatopics
NAME CLUSTER PARTITIONS REPLICATION FACTOR READY connect-cluster-configs my-cluster 1 1 True connect-cluster-offsets my-cluster 25 1 True connect-cluster-status my-cluster 5 1 True consumer-offsets---84e7a678d08f4bd226872e5cdd4eb527fadc1c6a my-cluster 50 1 True dbserver1---a96f69b23d6118ff415f772679da623fbbb99421 my-cluster 1 1 True dbserver1.inventory.addresses---1b6beaf7b2eb57d177d92be90ca2b210c9a56480 my-cluster 1 1 True dbserver1.inventory.customers---9931e04ec92ecc0924f4406af3fdace7545c483b my-cluster 1 1 True dbserver1.inventory.geom---9f7e136091f071bf49ca59bf99e86c713ee58dd5 my-cluster 1 1 True dbserver1.inventory.orders---ac5e98ac6a5d91e04d8ec0dc9078a1ece439081d my-cluster 1 1 True dbserver1.inventory.products---df0746db116844cee2297fab611c21b56f82dcef my-cluster 1 1 True dbserver1.inventory.products-on-hand---8649e0f17ffcc9212e266e31a7aeea4585e5c6b5 my-cluster 1 1 True schema-changes.inventory my-cluster 1 1 True strimzi-store-topic---effb8e3e057afce1ecf67c3f5d8e4e3ff177fc55 my-cluster 1 1 True strimzi-topic-operator-kstreams-topic-store-changelog---b75e702040b99be8a9263134de3507fc0cc4017b my-cluster 1 1 True
exec -n <project> -it <kafka-cluster> -- /opt/kafka/bin/kafka-console-consumer.sh > --bootstrap-server localhost:9092 > --from-beginning > --property print.key=true > --topic= <topic-name >
exec -n debezium -it my-cluster-kafka-0 -- /opt/kafka/bin/kafka-console-consumer.sh > --bootstrap-server localhost:9092 > --from-beginning > --property print.key=true > --topic=dbserver1.inventory.products_on_hand
{"schema":{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"}],"optional":false,"name":"dbserver1.inventory.products_on_hand.Key"},"payload":{"product_id":101}} {"schema":{"type":"struct","fields":[{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"},{"type":"int32","optional":false,"field":"quantity"}],"optional":true,"name":"dbserver1.inventory.products_on_hand.Value","field":"before"},{"type":"struct","fields":[{"type":"int32","optional":false,"field":"product_id"},{"type":"int32","optional":false,"field":"quantity"}],"optional":true,"name":"dbserver1.inventory.products_on_hand.Value","field":"after"},{"type":"struct","fields":[{"type":"string","optional":false,"field":"version"},{"type":"string","optional":false,"field":"connector"},{"type":"string","optional":false,"field":"name"},{"type":"int64","optional":false,"field":"ts_ms"},{"type":"string","optional":true,"name":"io.debezium.data.Enum","version":1,"parameters":{"allowed":"true,last,false"},"default":"false","field":"snapshot"},{"type":"string","optional":false,"field":"db"},{"type":"string","optional":true,"field":"sequence"},{"type":"string","optional":true,"field":"table"},{"type":"int64","optional":false,"field":"server_id"},{"type":"string","optional":true,"field":"gtid"},{"type":"string","optional":false,"field":"file"},{"type":"int64","optional":false,"field":"pos"},{"type":"int32","optional":false,"field":"row"},{"type":"int64","optional":true,"field":"thread"},{"type":"string","optional":true,"field":"query"}],"optional":false,"name":"io.debezium.connector.mysql.Source","field":"source"},{"type":"string","optional":false,"field":"op"},{"type":"int64","optional":true,"field":"ts_ms"},{"type":"struct","fields":[{"type":"string","optional":false,"field":"id"},{"type":"int64","optional":false,"field":"total_order"},{"type":"int64","optional":false,"field":"data_collection_order"}],"optional":true,"field":"transaction"}],"optional":false,"name": "dbserver1.inventory.products_on_hand.Envelope" }, "payload" :{ "before" : null , "after" :{ "product_id":101,"quantity":3 },"source":{"version":"2.3.4.Final-redhat-00001","connector":"mysql","name":"dbserver1","ts_ms":1638985247805,"snapshot":"true","db":"inventory","sequence":null,"table":"products_on_hand","server_id":0,"gtid":null,"file":"mysql-bin.000003","pos":156,"row":0,"thread":null,"query":null}, "op" : "r" ,"ts_ms":1638985247805,"transaction":null}}