Pulsar Connectors

音讯解决 (Processing guarantee)

• at-most-once
• at-least-once
• effectively-once

操作流程 (JDBC sink)

1. Add a configuration file.
2. Create a schema.
3. Upload a schema to a topic.
4. Create a JDBC sink
5. Stop a JDBC sink
6. Restart a JDBC sink
7. Update a JDBC sink

内建连接器 (Built-in connector)

Source connector

• Canal
• File
• Flume
• Kafka
• RabbitMQ

Sink connector

• ElasticSearch/Solr
• Flume
• HBase
• HDFS2/HDFS3
• InfluxDB
• JDBC ClickHouse/MariaDB/PostgreSQL
• Kafka
• MongoDB
• RabbitMQ
• Redis

ClickHouse Sink

1. 创立表

CREATE DATABASE IF NOT EXISTS monitor;
CREATE TABLE IF NOT EXISTS monitor.pulsar_clickhouse_jdbc_sink
(
    id   UInt32,
    name String
) ENGINE = TinyLog;
INSERT INTO monitor.pulsar_clickhouse_jdbc_sink (id, name)
VALUES (1, 'tmp');
SELECT *
FROM monitor.pulsar_clickhouse_jdbc_sink;

2. 创立配置

$ vi $PULSAR_HOME/connectors/pulsar-clickhouse-jdbc-sink.yaml
{
    "userName": "sysop",
    "password": "123456",
    "jdbcUrl": "jdbc:clickhouse://server-101:8123/monitor",
    "tableName": "pulsar_clickhouse_jdbc_sink"
}

3. 创立 schema

$ vi $PULSAR_HOME/connectors/json-schema.json
{
  "name": "","schema": {"type":"record","name":"SeedEvent","namespace":"com.cloudwise.quickstart.model","fields": [
      {
        "name": "id",
        "type": [
          "null",
          "int"
        ]
      },
      {
        "name": "name",
        "type": [
          "null",
          "string"
        ]
      }
    ]
  },
  "type": "JSON",
  "properties": {
    "__alwaysAllowNull": "true",
    "__jsr310ConversionEnabled": "false"
  }
}

4. 上传 schema

$ $PULSAR_HOME/bin/pulsar-admin schemas upload \
pulsar-postgres-jdbc-sink-topic \
-f $PULSAR_HOME/connectors/json-schema.json

5. 运行

$ $PULSAR_HOME/bin/pulsar-admin sinks create \
--tenant public \
--namespace default \
--name pulsar-clickhouse-jdbc-sink \
--inputs pulsar-clickhouse-jdbc-sink-topic \
--sink-config-file $PULSAR_HOME/connectors/pulsar-clickhouse-jdbc-sink.yaml \
--archive $PULSAR_HOME/connectors/pulsar-io-jdbc-clickhouse-2.6.2.nar \
--processing-guarantees EFFECTIVELY_ONCE \
--parallelism 1

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系列浏览

深入浅出 Apache Pulsar（1）：Pulsar vs Kafka

深入浅出 Apache Pulsar（2）：Pulsar 音讯机制

深入浅出 Apache Pulsar（3）：Pulsar Schema

深入浅出 Apache Pulsar（4）Pulsar Functions