php 操作调用 kafka使用方法
一、安装以及使用shell命令终端操作kafka环境配置
1、下载最新版本的kafka： kafka_2.11-1.0.0.tgz
http://mirrors.shu.edu.cn/apache/kafka/1.0.0/kafka_2.11-1.0.0.tgz
2、配置,解压后进入config目录
2.1、配置zookeeper.properties
默认监听端口2181
2.2、配置server.properties
开启监听端口，比如监听本地
listeners=PLAINTEXT://10.168.1.99:9092
3、启动
3.1、启动zookeeper
./bin/zookeeper-server-start.sh config/zookeeper.properties
3.2、启动server
./bin/kafka-server-start.sh config/server.properties
此处启动server时报错内存不足，解决方案要么加大系统内存，要么调小kafka需求内存
我这是调小kafka启动所需内存大小
vim kafka-server-start.sh
把其中:export KAFKA_HEAP_OPTS="-Xmx1G -Xms1G"
改为：export KAFKA_HEAP_OPTS="-Xmx512M -Xms512M"
4、启动测试的消费者，并监听topic的test
./bin/kafka-console-consumer.sh --zookeeper 10.168.1.99:2181 --topic test --from-beginning
5、启动测试的生产者，并监听topic的test
./bin/kafka-console-producer.sh --broker-list 10.168.1.99:9092 --topic test
此时，在生产者中输入数据后回车后，在消费者终端可以看到生产者产生的信息
二、使用PHP操作kafka
1、安装kafka的扩展php-rdkafka
1.1、在安装php-rdkafka之前，需要先安装librdkafka
git clone https://github.com/edenhill/librdkafka.git
./configure
make && make install
1.2、安装php-rdkafka
git clone https://github.com/arnaud-lb/php-rdkafka.git
cd php-rdkafka
phpize
./configure
make && make install
2、编写kafka生产者和消费者类
<?php
/**
* Kafka.php.
* User: lvfk
* Date: 2018/2/7 0007
* Time: 11:04
* Desc: Kafka服务
*/
namespace app\models;
use yii\base\InvalidConfigException;
class Kafka
{
public $broker_list = '10.168.1.99:9092';//配置kafka，可以用逗号隔开多个kafka
public $topic = 'topic';
public $partition = 0;
protected $producer = null;
protected $consumer = null;
public function __construct()
{
if (empty($this->broker_list)) {
throw new InvalidConfigException("broker not config");
}
$rk = new \RdKafka\Producer();
if (empty($rk)) {
throw new InvalidConfigException("producer error");
}
$rk->setLogLevel(LOG_DEBUG);
if (!$rk->addBrokers($this->broker_list)) {
throw new InvalidConfigException("producer error");
}
$this->producer = $rk;
}
/**
* 生产者
* @param array $messages
* @return mixed
*/
public function send($messages = [])
{
$topic = $this->producer->newTopic($this->topic);
return $topic->produce(RD_KAFKA_PARTITION_UA, $this->partition, json_encode($messages));
}
/**
* 消费者
*/
public function consumer($object, $callback){
$conf = new \RdKafka\Conf();
$conf->set('group.id', 0);
$conf->set('metadata.broker.list', $this->broker_list);
$topicConf = new \RdKafka\TopicConf();
$topicConf->set('auto.offset.reset', 'smallest');
$conf->setDefaultTopicConf($topicConf);
$consumer = new \RdKafka\KafkaConsumer($conf);
$consumer->subscribe([$this->topic]);
echo "waiting for messages.....\n";
while(true) {
$message = $consumer->consume(120*1000);
switch ($message->err) {
case RD_KAFKA_RESP_ERR_NO_ERROR:
echo "message payload....";
$object->$callback($message->payload);
break;
}
sleep(1);
}
}
}
3、配置
//配置kafka生产者
'asyncLog' => [
'class' => '\\app\\models\\Kafka',
'broker_list' => '10.168.1.99:9092',
'topic' => 'asynclog'
]
4、在业务代码中生产消息
\Yii::$app->asyncLog->send(['this is IndexController,'.date('y-md H:i:s',time())]);
5、在yii的command中消费
5.1、编写KafkaController.php
<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace app\commands;
use yii\console\Controller;
/**
* This command echoes the first argument that you have entered.
*
* This command is provided as an example for you to learn how to create console commands.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class KafkaController extends Controller
{
/**
* This command echoes what you have entered as the message.
* @param string $message the message to be echoed.
*/
public function actionConsume()
{
\Yii::$app->asyncLog->consumer($this, 'callback');
}
public function callback($message)
{
\Yii::info($message, 'testkafka');
\Yii::$app->log->setflushInterval(1);
}
}
5.2、运行:
./yii kafka/consume
6、当第4步中生产数据后，在第5步的终端可以消费数据
