使用 Apache Flink® DataStream API 將訊息寫入 Apache HBase®
注意
我們將在 2025 年 1 月 31 日淘汰 AKS 上的 Azure HDInsight。 在 2025 年 1 月 31 日之前，您必須將工作負載移轉至 Microsoft Fabric 或對等 Azure 產品，以避免突然終止工作負載。 訂用帳戶上的剩餘叢集將會停止並從主機中移除。
重要
此功能目前為預覽功能。 Microsoft Azure 預覽版增補使用規定包含適用於 Azure 功能 (搶鮮版 (Beta)、預覽版，或尚未正式發行的版本) 的更多法律條款。 若需此特定預覽版的相關資訊，請參閱 Azure HDInsight on AKS 預覽版資訊。 如有問題或功能建議，請在 AskHDInsight 上提交要求並附上詳細資料，並且在 Azure HDInsight 社群上追蹤我們以獲得更多更新資訊。
在本文中，了解如何使用 Apache Flink DataStream API 將訊息寫入 HBase。
概觀
Apache Flink 提供 HBase 連接器作為接收器，此連接器搭配 Flink，您可將即時處理應用程式的輸出儲存在 HBase 中。 了解如何以來源的形式處理 HDInsight Kafka 上的串流資料、執行轉換，然後接收到 HDInsight HBase 資料表。
在真實世界的案例中，此範例是一個串流分析層，可從使用即時感應器資料的物聯網 (IOT) 分析實現價值。 Flink Stream 可以從 Kafka 文章讀取資料，並將其寫入 HBase 資料表。 如果有即時串流 IOT 應用程式，則可收集、轉換及最佳化資訊。
必要條件
- AKS 上的 HDInsight 上的 Apache Flink 叢集
- HDInsight 上的 Apache Kafka 叢集
- HDInsight 上的 Apache HBase 2.4.11 叢集
- 您必須確保 HDInsight on AKS 叢集可使用相同的虛擬網路，連線到 HDInsight 叢集。
- IntelliJ IDEA 上可供在相同 Vnet 中的 Azure VM 上進行開發的 Maven 專案
實作步驟
使用管線來產生 Kafka 主題 (使用者按一下事件主題)
weblog.py
import json
import random
import time
from datetime import datetime
user_set = [
'John',
'XiaoMing',
'Mike',
'Tom',
'Machael',
'Zheng Hu',
'Zark',
'Tim',
'Andrew',
'Pick',
'Sean',
'Luke',
'Chunck'
]
web_set = [
'https://github.com',
'https://www.bing.com/new',
'https://kafka.apache.org',
'https://hbase.apache.org',
'https://flink.apache.org',
'https://spark.apache.org',
'https://trino.io',
'https://hadoop.apache.org',
'https://stackoverflow.com',
'https://docs.python.org',
'https://azure.microsoft.com/products/category/storage',
'/azure/hdinsight/hdinsight-overview',
'https://azure.microsoft.com/products/category/storage'
]
def main():
while True:
if random.randrange(13) < 4:
url = random.choice(web_set[:3])
else:
url = random.choice(web_set)
log_entry = {
'userName': random.choice(user_set),
'visitURL': url,
'ts': datetime.now().strftime("%m/%d/%Y %H:%M:%S")
}
print(json.dumps(log_entry))
time.sleep(0.05)
if __name__ == "__main__":
main()
使用管線來產生 Apache Kafka 主題
我們將針對 Kafka 主題使用 click_events
python weblog.py | /usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --bootstrap-server wn0-contsk:9092 --topic click_events
Kafka 上的範例命令
-- create topic (replace with your Kafka bootstrap server)
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --create --replication-factor 2 --partitions 3 --topic click_events --bootstrap-server wn0-contsk:9092
-- delete topic (replace with your Kafka bootstrap server)
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --delete --topic click_events --bootstrap-server wn0-contsk:9092
-- produce topic (replace with your Kafka bootstrap server)
python weblog.py | /usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --bootstrap-server wn0-contsk:9092 --topic click_events
-- consume topic
/usr/hdp/current/kafka-broker/bin/kafka-console-consumer.sh --bootstrap-server wn0-contsk:9092 --topic click_events --from-beginning
{"userName": "Luke", "visitURL": "https://azure.microsoft.com/products/category/storage", "ts": "07/11/2023 06:39:43"}
{"userName": "Sean", "visitURL": "https://www.bing.com/new", "ts": "07/11/2023 06:39:43"}
{"userName": "XiaoMing", "visitURL": "https://hbase.apache.org", "ts": "07/11/2023 06:39:43"}
{"userName": "Machael", "visitURL": "https://www.bing.com/new", "ts": "07/11/2023 06:39:43"}
{"userName": "Andrew", "visitURL": "https://github.com", "ts": "07/11/2023 06:39:43"}
{"userName": "Zark", "visitURL": "https://kafka.apache.org", "ts": "07/11/2023 06:39:43"}
{"userName": "XiaoMing", "visitURL": "https://trino.io", "ts": "07/11/2023 06:39:43"}
{"userName": "Zark", "visitURL": "https://flink.apache.org", "ts": "07/11/2023 06:39:43"}
{"userName": "Mike", "visitURL": "https://kafka.apache.org", "ts": "07/11/2023 06:39:43"}
{"userName": "Zark", "visitURL": "https://docs.python.org", "ts": "07/11/2023 06:39:44"}
{"userName": "John", "visitURL": "https://www.bing.com/new", "ts": "07/11/2023 06:39:44"}
{"userName": "Mike", "visitURL": "https://hadoop.apache.org", "ts": "07/11/2023 06:39:44"}
{"userName": "Tim", "visitURL": "https://www.bing.com/new", "ts": "07/11/2023 06:39:44"}
.....
在 HDInsight 叢集上建立 HBase 資料表
root@hn0-contos:/home/sshuser# hbase shell
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/usr/hdp/5.1.1.3/hadoop/lib/slf4j-reload4j-1.7.35.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/5.1.1.3/hbase/lib/client-facing-thirdparty/slf4j-reload4j-1.7.33.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Reload4jLoggerFactory]
HBase Shell
Use "help" to get list of supported commands.
Use "exit" to quit this interactive shell.
For more information, see, http://hbase.apache.org/2.0/book.html#shell
Version 2.4.11.5.1.1.3, rUnknown, Thu Apr 20 12:31:07 UTC 2023
Took 0.0032 seconds
hbase:001:0> create 'user_click_events','user_info'
Created table user_click_events
Took 5.1399 seconds
=> Hbase::Table - user_click_events
hbase:002:0>
開發專案以供在 Flink 上提交 jar
使用下列 pom.xml 建立 maven 專案
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>contoso.example</groupId>
<artifactId>FlinkHbaseDemo</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<flink.version>1.17.0</flink.version>
<java.version>1.8</java.version>
<scala.binary.version>2.12</scala.binary.version>
<hbase.version>2.4.11</hbase.version>
<kafka.version>3.2.0</kafka.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-java</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-streaming-java -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-streaming-java</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-clients -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-clients</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-connector-hbase-base -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-hbase-base</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.hbase/hbase-client -->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>${hbase.version}</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>3.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-kafka</artifactId>
<version>${flink.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.flink/flink-connector-base -->
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-connector-base</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-core</artifactId>
<version>${flink.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>3.0.0</version>
<configuration>
<appendAssemblyId>false</appendAssemblyId>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
原始程式碼
撰寫 HBase 接收程式
HBaseWriterSink
package contoso.example;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
public class HBaseWriterSink extends RichSinkFunction<Tuple3<String,String,String>> {
String hbase_zk = "<update-hbasezk-ip>:2181,<update-hbasezk-ip>:2181,<update-hbasezk-ip>:2181";
Connection hbase_conn;
Table tb;
int i = 0;
@Override
public void open(Configuration parameters) throws Exception {
super.open(parameters);
org.apache.hadoop.conf.Configuration hbase_conf = HBaseConfiguration.create();
hbase_conf.set("hbase.zookeeper.quorum", hbase_zk);
hbase_conf.set("zookeeper.znode.parent", "/hbase-unsecure");
hbase_conn = ConnectionFactory.createConnection(hbase_conf);
tb = hbase_conn.getTable(TableName.valueOf("user_click_events"));
}
@Override
public void invoke(Tuple3<String,String,String> value, Context context) throws Exception {
byte[] rowKey = Bytes.toBytes(String.format("%010d", i++));
Put put = new Put(rowKey);
put.addColumn(Bytes.toBytes("user_info"), Bytes.toBytes("userName"), Bytes.toBytes(value.f0));
put.addColumn(Bytes.toBytes("user_info"), Bytes.toBytes("visitURL"), Bytes.toBytes(value.f1));
put.addColumn(Bytes.toBytes("user_info"), Bytes.toBytes("ts"), Bytes.toBytes(value.f2));
tb.put(put);
};
public void close() throws Exception {
if (null != tb) tb.close();
if (null != hbase_conn) hbase_conn.close();
}
}
main:KafkaSinkToHbase
將 Kafka 接收寫入 HBase 程式
package contoso.example;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.api.common.typeinfo.Types;
import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.connector.kafka.source.KafkaSource;
import org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
public class KafkaSinkToHbase {
public static void main(String[] args) throws Exception {
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment().setParallelism(1);
String kafka_brokers = "10.0.0.38:9092,10.0.0.39:9092,10.0.0.40:9092";
KafkaSource<String> source = KafkaSource.<String>builder()
.setBootstrapServers(kafka_brokers)
.setTopics("click_events")
.setGroupId("my-group")
.setStartingOffsets(OffsetsInitializer.earliest())
.setValueOnlyDeserializer(new SimpleStringSchema())
.build();
DataStreamSource<String> kafka = env.fromSource(source, WatermarkStrategy.noWatermarks(), "Kafka Source").setParallelism(1);
DataStream<Tuple3<String,String,String>> dataStream = kafka.map(line-> {
String[] fields = line.toString().replace("{","").replace("}","").
replace("\"","").split(",");
Tuple3<String, String,String> tuple3 = Tuple3.of(fields[0].substring(10),fields[1].substring(11),fields[2].substring(5));
return tuple3;
}).returns(Types.TUPLE(Types.STRING,Types.STRING,Types.STRING));
dataStream.addSink(new HBaseWriterSink());
env.execute("Kafka Sink To Hbase");
}
}
提交作業
將作業 JAR 上傳至與叢集相關聯的儲存體帳戶。
在 [應用程式模式] 索引標籤中新增作業詳細資料。
注意
請務必新增
Hadoop.class.enable和classloader.resolve-order設定。選取 [作業記錄彙總] 以將記錄儲存在 ABFS 中。
提交作業。
您應該能夠在這裡看到作業的已提交狀態。
驗證 HBase 資料表資料
hbase:001:0> scan 'user_click_events',{LIMIT=>5}
ROW COLUMN+CELL
0000000000 column=user_info:ts, timestamp=2024-03-20T02:02:46.932, value=03/20/2024 02:02:43
0000000000 column=user_info:userName, timestamp=2024-03-20T02:02:46.932, value=Pick
0000000000 column=user_info:visitURL, timestamp=2024-03-20T02:02:46.932, value=
https://hadoop.apache.org
0000000001 column=user_info:ts, timestamp=2024-03-20T02:02:46.991, value=03/20/2024 02:02:43
0000000001 column=user_info:userName, timestamp=2024-03-20T02:02:46.991, value=Zheng Hu
0000000001 column=user_info:visitURL, timestamp=2024-03-20T02:02:46.991, value=/azure/hdinsight/hdinsight-overview
0000000002 column=user_info:ts, timestamp=2024-03-20T02:02:47.001, value=03/20/2024 02:02:43
0000000002 column=user_info:userName, timestamp=2024-03-20T02:02:47.001, value=Sean
0000000002 column=user_info:visitURL, timestamp=2024-03-20T02:02:47.001, value=
https://spark.apache.org
0000000003 column=user_info:ts, timestamp=2024-03-20T02:02:47.008, value=03/20/2024 02:02:43
0000000003 column=user_info:userName, timestamp=2024-03-20T02:02:47.008, value=Zheng Hu
0000000003 column=user_info:visitURL, timestamp=2024-03-20T02:02:47.008, value=
https://kafka.apache.org
0000000004 column=user_info:ts, timestamp=2024-03-20T02:02:47.017, value=03/20/2024 02:02:43
0000000004 column=user_info:userName, timestamp=2024-03-20T02:02:47.017, value=Chunck
0000000004 column=user_info:visitURL, timestamp=2024-03-20T02:02:47.017, value=
https://github.com
5 row(s)
Took 0.9269 seconds
注意
- FlinkKafkaConsumer 已被取代並隨著 Flink 1.17 移除，請改用 KafkaSource。
- FlinkKafkaProducer 已被取代並隨著 Flink 1.15 移除，請改用 KafkaSink。
參考資料
- Apache Kafka 連接器
- 下載 IntelliJ IDEA
- Apache、Apache Kafka、Kafka、Apache HBase、HBase、Apache Flink、Flink 和相關聯的開放原始碼專案名稱是 Apache Software Foundation (ASF) 的商標。