kafka安装步骤

kafka 安装内存会报不够

        https://stackoverflow.com/questions/9350437/incompatible-initial-and-maximum-heap-sizes-specified

Picked up _JAVA_OPTIONS: -Xmx1024M

OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000b5a00000, 1073741824, 0) failed; error='Cannot allocate memory' (errno=12)

#

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (malloc) failed to allocate 1073741824 bytes for committing reserved memory.

需要调整jvm

export _JAVA_OPTIONS=-Xmx1024M

export _JAVA_OPTIONS=-Xms512M

bin/kafka-server-start.sh config/server.properties

Picked up _JAVA_OPTIONS: -Xms512M

创建topic 

bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic a2

Created topic "a2".

查看topic

       bin/kafka-topics.sh --list --zookeeper localhost:2181

发送消息到指定的topic 

　　bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test

   

 WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 1 : {test=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)

　　如果发现是没有leader的提示错误，需要修改配置文件

"github.com/Shopify/sarama" 不支持group，不支持rebanlance。

func kafka_exampe() {

    consumer, err := sarama.NewConsumer([]string{"192.168.199.133:9092"}, nil)
    if err != nil {
        panic(err)
    }

    defer func() {
        if err := consumer.Close(); err != nil {
            log.Fatalln(err)
        }
    }()

    partitionConsumer, err := consumer.ConsumePartition("test", 0, sarama.OffsetNewest)
    if err != nil {
        panic(err)
    }

    defer func() {
        if err := partitionConsumer.Close(); err != nil {
            log.Fatalln(err)
        }
    }()

    // Trap SIGINT to trigger a shutdown.
    signals := make(chan os.Signal, 1)
    signal.Notify(signals, os.Interrupt)

    consumed := 0
ConsumerLoop:
    for {
        select {
        case msg := <-partitionConsumer.Messages():
            log.Printf("Consumed message offset %d
", msg.Offset)
            log.Printf(string(msg.Value))
            consumed++
        case <-signals:
            break ConsumerLoop
        }
    }

    log.Printf("Consumed: %d
", consumed)
}