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Version: 5.0

RocketMQ Connect in Action 2

PostgreSQL Source(CDC) - >RocketMQ Connect -> MySQL Sink(JDBC)


Start RocketMQ

  1. Linux/Unix/Mac
  2. 64bit JDK 1.8+;
  3. Maven 3.2.x+;
  4. Start RocketMQ;

tips : ${ROCKETMQ_HOME} locational instructions version:/rocketmq-all-4.9.4-bin-release version:/rocketmq-all-4.9.4-source-release/distribution

Start Connect

Compiling Connector Plugin

Debezium RocketMQ Connector

$ cd rocketmq-connect/connectors/rocketmq-connect-debezium/
$ mvn clean package -Dmaven.test.skip=true

Move the compiled Debezium PostgreSQL RocketMQ Connector package into the Runtime loading directory. The command is as follows :

mkdir -p /usr/local/connector-plugins
cp rocketmq-connect-debezium-postgresql/target/rocketmq-connect-debezium-postgresql-0.0.1-SNAPSHOT-jar-with-dependencies.jar /usr/local/connector-plugins

JDBC Connector

Move the compiled JDBC Connector package into the Runtime loading directory. The command is as follows:

$ cd rocketmq-connect/connectors/rocketmq-connect-jdbc/
$ mvn clean package -Dmaven.test.skip=true
cp rocketmq-connect-jdbc/target/rocketmq-connect-jdbc-0.0.1-SNAPSHOT-jar-with-dependencies.jar /usr/local/connector-plugins

Start Connect Runtime

cd  rocketmq-connect

mvn -Prelease-connect -DskipTests clean install -U

Modify the configuration connect-standalone.conf, the main configuration is as follows

$ cd distribution/target/rocketmq-connect-0.0.1-SNAPSHOT/rocketmq-connect-0.0.1-SNAPSHOT
$ vim conf/connect-standalone.conf
$ cd distribution/target/rocketmq-connect-0.0.1-SNAPSHOT/rocketmq-connect-0.0.1-SNAPSHOT
$ vim conf/connect-standalone.conf

## Http port for user to access REST API

# Rocketmq namesrvAddr

# RocketMQ acl


# Core configuration, configure the plugin directory of the previously compiled debezium package here
# Source or sink connector jar file dir,The default value is rocketmq-connect-sample
cd distribution/target/rocketmq-connect-0.0.1-SNAPSHOT/rocketmq-connect-0.0.1-SNAPSHOT

sh bin/ -c conf/connect-standalone.conf &

Postgres image

Use debezium's Postgres docker environment to set up the Postgres database

# starting a pg instance
docker run -d --name postgres -p 5432:5432 -e POSTGRES_USER=start_data_engineer -e POSTGRES_PASSWORD=password debezium/postgres:14

# bash into postgres instance
docker exec -ti postgres /bin/bash

Postgres information Port:5432 Aaccount:start_data_engineer/password Synchronize original database:bank.holding Target database table:bank1.holding

MySQL image

Use debezium's MySQL docker environment to set up the MySQL database.

docker run -it --rm --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=debezium -e MYSQL_USER=mysqluser -e MYSQL_PASSWORD=mysqlpw

MySQL information



Test data

Log in to the database with the start_data_engineer/password account

Source database table:bank.holding

SET search_path TO bank,public;
CREATE TABLE bank.holding (
holding_id int,
user_id int,
holding_stock varchar(8),
holding_quantity int,
datetime_created timestamp,
datetime_updated timestamp,
primary key(holding_id)
ALTER TABLE bank.holding replica identity FULL;
insert into bank.holding values (1000, 1, 'VFIAX', 10, now(), now());
insert into bank.holding values (1000, 1, 'VFIAX', 10, now(), now());
insert into bank.holding values (1001, 2, 'SP500', 1, now(), now());
insert into bank.holding values (1003, 3, 'SP500', 1, now(), now());
update bank.holding set holding_quantity = 300 where holding_id=1000;

Target database table:bank1.holding

create database bank1;
CREATE TABLE holding (
holding_id int,
user_id int,
holding_stock varchar(8),
holding_quantity int,
datetime_created bigint,
datetime_updated bigint,
primary key(holding_id)

Start Connector

Start Debezium source connector

Synchronize original table data:bank.holding Purpose: Parse Postgres binlog and encapsulate it into a common ConnectRecord object, which is sent to the RocketMQ Topic.

curl -X POST -H "Content-Type: application/json" -d  '{
"connector.class": "org.apache.rocketmq.connect.debezium.postgres.DebeziumPostgresConnector",
"max.task": "1",
"connect.topicname": "debezium-postgres-source-01",
"kafka.transforms": "Unwrap",
"kafka.transforms.Unwrap.delete.handling.mode": "none",
"kafka.transforms.Unwrap.type": "io.debezium.transforms.ExtractNewRecordState",
"kafka.transforms.Unwrap.add.headers": "op,source.db,source.table",
"database.history.skip.unparseable.ddl": true,
"": "bankserver1",
"database.port": 5432,
"database.hostname": "database ip",
"database.connectionTimeZone": "UTC",
"database.user": "start_data_engineer",
"database.dbname": "start_data_engineer",
"database.password": "password",
"table.whitelist": "bank.holding",
"key.converter": "org.apache.rocketmq.connect.runtime.converter.record.json.JsonConverter",
"value.converter": "org.apache.rocketmq.connect.runtime.converter.record.json.JsonConverter"

Start JDBC sink connector

Purpose: Consume data from the Topic and write it to the target table through JDBC protocol.

curl -X POST -H "Content-Type: application/json" -d '{
"connector.class": "org.apache.rocketmq.connect.jdbc.connector.JdbcSinkConnector",
"max.task": "2",
"connect.topicnames": "debezium-postgres-source-01",
"connection.url": "jdbc:mysql://database ip:3306/bank1",
"connection.user": "root",
"connection.password": "debezium",
"pk.fields": "holding_id",
"": "true",
"pk.mode": "record_key",
"insert.mode": "UPSERT",
"db.timezone": "UTC",
"table.types": "TABLE",
"": "dlq-topic",
"errors.log.enable": "true",
"errors.tolerance": "ALL",
"delete.enabled": "true",
"key.converter": "org.apache.rocketmq.connect.runtime.converter.record.json.JsonConverter",
"value.converter": "org.apache.rocketmq.connect.runtime.converter.record.json.JsonConverter"

After the creation of the above two Connector tasks, log in to the database using the start_data_engineer/password account.

Any add, delete, or modification made to the source database table bankholding will be synced to the target table bank1.holding.