一、安裝docker-compose
這裏不使用官方鏈接進行安裝,因爲會很慢
https://github.com/docker/compose/releases
可以前往官網查看目前最新版,然後下面自行更換
curl -L https://get.daocloud.io/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
#驗證是否安裝成功
docker-compose --version
準備工作:
#創建兩個文件夾分別存放docker-compose.yml文件,方便管理
cd /usr/local
mkdir docker
cd docker
mkdir zookeper
mkdir kafka
因爲考慮到有時候只需要啓動zookeeper而並不需要啓動kafka,例如:使用Dubbo,SpringCloud的時候利用Zookeeper當註冊中心。所以本次安裝分成兩個docker-compose.yml來安裝和啓動
二、搭建zookeeper集羣
cd /usr/local/docker/zookeeper
vim docker-compose.yml
docker-compose.yml文件內容
version: '3.3'
services:
zoo1:
image: zookeeper
restart: always
hostname: zoo1
ports:
- 2181:2181
environment:
ZOO_MY_ID: 1
ZOO_SERVERS: server.1=0.0.0.0:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=zoo3:2888:3888;2181
zoo2:
image: zookeeper
restart: always
hostname: zoo2
ports:
- 2182:2181
environment:
ZOO_MY_ID: 2
ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=0.0.0.0:2888:3888;2181 server.3=zoo3:2888:3888;2181
zoo3:
image: zookeeper
restart: always
hostname: zoo3
ports:
- 2183:2181
environment:
ZOO_MY_ID: 3
ZOO_SERVERS: server.1=zoo1:2888:3888;2181 server.2=zoo2:2888:3888;2181 server.3=0.0.0.0:2888:3888;2181
參考:
DockerHub zookeeper鏈接:https://hub.docker.com/_/zookeeper
接着:
# :wq 保存退出之後
cd /usr/local/docker/zookeeper #確保docker-compose.yml在當前目錄,且自己目前也在當前目錄
docker-compose up -d
#等待安裝和啓動
docker ps #查看容器狀態
#參考命令
docker-compose ps #查看集羣容器狀態
docker-compose stop #停止集羣容器
docker-compose restart #重啓集羣容器
如圖代表zookeeper已經安裝以及啓動成功,可自行使用端口掃描工具掃描,等待kafka安裝成功以後集中測試
三、Kafka集羣搭建
確保已經搭建完成zookeeper環境
cd /usr/local/docker/kafka
vim dokcer-compose.yml
docker-compose.yml內容:
version: '2'
services:
kafka1:
image: wurstmeister/kafka
ports:
- "9092:9092"
environment:
KAFKA_ADVERTISED_HOST_NAME: 192.168.0.1 ## 修改:宿主機IP
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.0.1:9092 ## 修改:宿主機IP
KAFKA_ZOOKEEPER_CONNECT: 192.168.0.1:2181, 192.168.0.1:2182, 192.168.0.1:2183 #剛剛安裝的zookeeper宿主機IP以及端口
KAFKA_ADVERTISED_PORT: 9092
container_name: kafka1
kafka2:
image: wurstmeister/kafka
ports:
- "9093:9092"
environment:
KAFKA_ADVERTISED_HOST_NAME: 192.168.0.1 ## 修改:宿主機IP
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://192.168.0.1:9093 ## 修改:宿主機IP
KAFKA_ZOOKEEPER_CONNECT: 192.168.0.1:2181, 192.168.0.1:2182, 192.168.0.1:2183 #剛剛安裝的zookeeper宿主機IP以及端口
KAFKA_ADVERTISED_PORT: 9093
container_name: kafka2
kafka-manager:
image: sheepkiller/kafka-manager ## 鏡像:開源的web管理kafka集羣的界面
environment:
ZK_HOSTS: 192.168.0.1 ## 修改:宿主機IP
ports:
- "9000:9000" ## 暴露端口
kafka-manager可以自行選擇是否安裝,不需要安裝去除即可
接着:
# :wq 保存退出之後
cd /usr/local/docker/kafka#確保docker-compose.yml在當前目錄,且自己目前也在當前目錄
docker-compose up -d
#等待安裝和啓動
docker ps #查看容器狀態
#參考命令
docker-compose ps #查看集羣容器狀態
docker-compose stop #停止集羣容器
docker-compose restart #重啓集羣容器
如圖代表kafka已經安裝以及啓動成功,接下來進行測試
四、使用Java代碼進行測試
(1)引入pom.xml依賴
<!-- https://mvnrepository.com/artifact/org.apache.kafka/kafka -->
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.12</artifactId>
<version>2.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
(2)創建pojo對象以及Consumer和Producter
User對象
import lombok.Data;
@Data
public class User {
private String id;
private String name;
}
Producter
import java.util.Properties;
import org.apache.kafka.clients.producer.Callback;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.clients.producer.RecordMetadata;
import com.alibaba.fastjson.JSON;
public class CollectKafkaProducer {
// 創建一個kafka生產者
private final KafkaProducer<String, String> producer;
// 定義一個成員變量爲topic
private final String topic;
// 初始化kafka的配置文件和實例:Properties & KafkaProducer
public CollectKafkaProducer(String topic) {
Properties props = new Properties();
// 配置broker地址
props.put("bootstrap.servers", "192.168.0.1:9092");
// 定義一個 client.id
props.put("client.id", "demo-producer-test");
// 其他配置項:
// props.put("batch.size", 16384); //16KB -> 滿足16KB發送批量消息
// props.put("linger.ms", 10); //10ms -> 滿足10ms時間間隔發送批量消息
// props.put("buffer.memory", 33554432); //32M -> 緩存提性能
// kafka 序列化配置:
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
// 創建 KafkaProducer 與 接收 topic
this.producer = new KafkaProducer<>(props);
this.topic = topic;
}
// 發送消息 (同步或者異步)
public void send(Object message, boolean syncSend) throws InterruptedException {
try {
// 同步發送
if(syncSend) {
producer.send(new ProducerRecord<>(topic, JSON.toJSONString(message)));
}
// 異步發送(callback實現回調監聽)
else {
producer.send(new ProducerRecord<>(topic,
JSON.toJSONString(message)),
new Callback() {
@Override
public void onCompletion(RecordMetadata recordMetadata, Exception e) {
if (e != null) {
System.err.println("Unable to write to Kafka in CollectKafkaProducer [" + topic + "] exception: " + e);
}
}
});
}
} catch (Exception e) {
e.printStackTrace();
}
}
// 關閉producer
public void close() {
producer.close();
}
// 測試函數
public static void main(String[] args) throws InterruptedException {
String topic = "topic1";
CollectKafkaProducer collectKafkaProducer = new CollectKafkaProducer(topic);
for(int i = 0 ; i < 10; i ++) {
User user = new User();
user.setId(i+"");
user.setName("張三");
collectKafkaProducer.send(user, true);
}
Thread.sleep(Integer.MAX_VALUE);
}
}
Consumer
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.apache.kafka.clients.consumer.OffsetAndMetadata;
import org.apache.kafka.common.TopicPartition;
import lombok.extern.slf4j.Slf4j;
@Slf4j
public class CollectKafkaConsumer {
// 定義消費者實例
private final KafkaConsumer<String, String> consumer;
// 定義消費主題
private final String topic;
// 消費者初始化
public CollectKafkaConsumer(String topic) {
Properties props = new Properties();
// 消費者的zookeeper 地址配置
props.put("zookeeper.connect", "192.168.0.1:2181");
// 消費者的broker 地址配置
props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "192.168.0.1:9092");
// 消費者組定義
props.put(ConsumerConfig.GROUP_ID_CONFIG, "demo-group-id");
// 是否自動提交(auto commit,一般生產環境均設置爲false,則爲手工確認)
props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, "false");
// 自動提交配置項
// props.put(ConsumerConfig.AUTO_COMMIT_INTERVAL_MS_CONFIG, "1000");
// 消費進度(位置 offset)重要設置: latest,earliest
props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
// 超時時間配置
props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "30000");
// kafka序列化配置
props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
// 創建consumer對象 & 賦值topic
consumer = new KafkaConsumer<>(props);
this.topic = topic;
// 訂閱消費主題
consumer.subscribe(Collections.singletonList(topic));
}
// 循環拉取消息並進行消費,手工ACK方式
private void receive(KafkaConsumer<String, String> consumer) {
while (true) {
// 拉取結果集(拉取超時時間爲1秒)
ConsumerRecords<String, String> records = consumer.poll(1000);
// 拉取結果集後獲取具體消息的主題名稱 分區位置 消息數量
for (TopicPartition partition : records.partitions()) {
List<ConsumerRecord<String, String>> partitionRecords = records.records(partition);
String topic = partition.topic();
int size = partitionRecords.size();
log.info("獲取topic:{},分區位置:{},消息數爲:{}", topic, partition.partition(), size);
// 分別對每個partition進行處理
for (int i = 0; i< size; i++) {
System.err.println("-----> value: " + partitionRecords.get(i).value());
long offset = partitionRecords.get(i).offset() + 1;
// consumer.commitSync(); // 這種提交會自動獲取partition 和 offset
// 這種是顯示提交partition 和 offset 進度
consumer.commitSync(Collections.singletonMap(partition,
new OffsetAndMetadata(offset)));
log.info("同步成功, topic: {}, 提交的 offset: {} ", topic, offset);
}
}
}
}
// 測試函數
public static void main(String[] args) {
String topic = "topic1";
CollectKafkaConsumer collectKafkaConsumer = new CollectKafkaConsumer(topic);
collectKafkaConsumer.receive(collectKafkaConsumer.consumer);
}
}
先啓動Producter,隨後啓動Consumer
成功消費消息,所有配置OK