【kafka学习笔记】PHP接入kafka

2021-12-28 11:02:01 阅读：178 来源： 互联网

标签：set 接入 KAFKA kafka RD topicConf offset message PHP

安装扩展

# 先安装rdkfka库文件
git clone https://github.com/edenhill/librdkafka.git

或者：

wget https://gitee.com/wanhedigital_1553363148/librdkafka/attach_files/619880/download/librdkafka-1.6.0.tar.gz -O librdkafka.tar.gz


cd librdkafka/
./configure 
make
sudo make install

pecl install   rdkafka

vim [php]/php.ini
extension=rdkafka.so

生产者

<?php
$conf = new RdKafka\Conf();
$conf->setDrMsgCb(function ($kafka, $message) {
    file_put_contents("./dr_cb.log", var_export($message, true).PHP_EOL, FILE_APPEND);
});
$conf->setErrorCb(function ($kafka, $err, $reason) {
    file_put_contents("./err_cb.log", sprintf("Kafka error: %s (reason: %s)", rd_kafka_err2str($err), $reason).PHP_EOL, FILE_APPEND);
});

$rk = new RdKafka\Producer($conf);
$rk->setLogLevel(LOG_DEBUG);
$rk->addBrokers("127.0.0.1");

$cf = new RdKafka\TopicConf();
// -1必须等所有brokers同步完成的确认 1当前服务器确认 0不确认，这里如果是0回调里的offset无返回，如果是1和-1会返回offset
// 我们可以利用该机制做消息生产的确认，不过还不是100%，因为有可能会中途kafka服务器挂掉
$cf->set('request.required.acks', 0);
$topic = $rk->newTopic("test", $cf);

$option = 'qkl';
for ($i = 0; $i < 20; $i++) {
    //RD_KAFKA_PARTITION_UA自动选择分区
    //$option可选
    $topic->produce(RD_KAFKA_PARTITION_UA, 0, "qkl . $i", $option);
}


$len = $rk->getOutQLen();
while ($len > 0) {
    $len = $rk->getOutQLen();
    var_dump($len);
    $rk->poll(50);
}

Low Level 消费者

<?php
$conf = new RdKafka\Conf();
$conf->setDrMsgCb(function ($kafka, $message) {
    file_put_contents("./c_dr_cb.log", var_export($message, true), FILE_APPEND);
});
$conf->setErrorCb(function ($kafka, $err, $reason) {
    file_put_contents("./err_cb.log", sprintf("Kafka error: %s (reason: %s)", rd_kafka_err2str($err), $reason).PHP_EOL, FILE_APPEND);
});

//设置消费组
$conf->set('group.id', 'myConsumerGroup');

$rk = new RdKafka\Consumer($conf);
$rk->addBrokers("127.0.0.1");

$topicConf = new RdKafka\TopicConf();
$topicConf->set('request.required.acks', 1);
//在interval.ms的时间内自动提交确认、建议不要启动
//$topicConf->set('auto.commit.enable', 1);
$topicConf->set('auto.commit.enable', 0);
$topicConf->set('auto.commit.interval.ms', 100);

// 设置offset的存储为file
//$topicConf->set('offset.store.method', 'file');
// 设置offset的存储为broker
 $topicConf->set('offset.store.method', 'broker');
//$topicConf->set('offset.store.path', __DIR__);

//smallest：简单理解为从头开始消费，其实等价于上面的 earliest
//largest：简单理解为从最新的开始消费，其实等价于上面的 latest
//$topicConf->set('auto.offset.reset', 'smallest');

$topic = $rk->newTopic("test", $topicConf);

// 参数1消费分区0
// RD_KAFKA_OFFSET_BEGINNING 重头开始消费
// RD_KAFKA_OFFSET_STORED 最后一条消费的offset记录开始消费
// RD_KAFKA_OFFSET_END 最后一条消费
$topic->consumeStart(0, RD_KAFKA_OFFSET_BEGINNING);
//$topic->consumeStart(0, RD_KAFKA_OFFSET_END); //
//$topic->consumeStart(0, RD_KAFKA_OFFSET_STORED);

while (true) {
    //参数1表示消费分区，这里是分区0
    //参数2表示同步阻塞多久
    $message = $topic->consume(0, 12 * 1000);
    if (is_null($message)) {
        sleep(1);
        echo "No more messages\n";
        continue;
    }
    switch ($message->err) {
        case RD_KAFKA_RESP_ERR_NO_ERROR:
            var_dump($message);
            break;
        case RD_KAFKA_RESP_ERR__PARTITION_EOF:
            echo "No more messages; will wait for more\n";
            break;
        case RD_KAFKA_RESP_ERR__TIMED_OUT:
            echo "Timed out\n";
            break;
        default:
            throw new \Exception($message->errstr(), $message->err);
            break;
    }
}

High LEVEL消费者

<?php
/**
 * Created by PhpStorm.
 * User: qkl
 * Date: 2018/8/22
 * Time: 17:58
 */
$conf = new \RdKafka\Conf();

function rebalance(\RdKafka\KafkaConsumer $kafka, $err, array $partitions = null) {
    global $offset;
    switch ($err) {
        case RD_KAFKA_RESP_ERR__ASSIGN_PARTITIONS:
            echo "Assign: ";
            var_dump($partitions);
            $kafka->assign();
//            $kafka->assign([new RdKafka\TopicPartition("qkl01", 0, 0)]);
            break;

        case RD_KAFKA_RESP_ERR__REVOKE_PARTITIONS:
            echo "Revoke: ";
            var_dump($partitions);
            $kafka->assign(NULL);
            break;

        default:
            throw new \Exception($err);
    }
}

// Set a rebalance callback to log partition assignments (optional)
$conf->setRebalanceCb(function(\RdKafka\KafkaConsumer $kafka, $err, array $partitions = null) {
    rebalance($kafka, $err, $partitions);
});

// Configure the group.id. All consumer with the same group.id will consume
// different partitions.
$conf->set('group.id', 'test-110-g100');

// Initial list of Kafka brokers
$conf->set('metadata.broker.list', '192.168.216.122');

$topicConf = new \RdKafka\TopicConf();

$topicConf->set('request.required.acks', -1);
//在interval.ms的时间内自动提交确认、建议不要启动
$topicConf->set('auto.commit.enable', 0);
//$topicConf->set('auto.commit.enable', 0);
$topicConf->set('auto.commit.interval.ms', 100);

// 设置offset的存储为file
$topicConf->set('offset.store.method', 'file');
$topicConf->set('offset.store.path', __DIR__);
// 设置offset的存储为broker
// $topicConf->set('offset.store.method', 'broker');

// Set where to start consuming messages when there is no initial offset in
// offset store or the desired offset is out of range.
// 'smallest': start from the beginning
$topicConf->set('auto.offset.reset', 'smallest');

// Set the configuration to use for subscribed/assigned topics
$conf->setDefaultTopicConf($topicConf);

$consumer = new \RdKafka\KafkaConsumer($conf);

//$KafkaConsumerTopic = $consumer->newTopic('qkl01', $topicConf);

// Subscribe to topic 'test'
$consumer->subscribe(['qkl01']);

echo "Waiting for partition assignment... (make take some time when\n";
echo "quickly re-joining the group after leaving it.)\n";

while (true) {
    $message = $consumer->consume(120*1000);
    switch ($message->err) {
        case RD_KAFKA_RESP_ERR_NO_ERROR:
            var_dump($message);
//            $consumer->commit($message);
//            $KafkaConsumerTopic->offsetStore(0, 20);
            break;
        case RD_KAFKA_RESP_ERR__PARTITION_EOF:
            echo "No more messages; will wait for more\n";
            break;
        case RD_KAFKA_RESP_ERR__TIMED_OUT:
            echo "Timed out\n";
            break;
        default:
            throw new \Exception($message->errstr(), $message->err);
            break;
    }
}

消费组特别说明

特别注意，High LEVEL消费者设置的消费组，kafka服务器才会记录, Low Level消费者设置的消费组，服务器不会记录

常用脚本实践：https://segmentfault.com/a/1190000016106045

分享一个打包好的php-rdkafka的类库

https://github.com/qkl9527/php-rdkafka-class

标签：set,接入,KAFKA,kafka,RD,topicConf,offset,message,PHP
来源： https://www.cnblogs.com/HappyTeemo/p/15739784.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。