如何使用go语言进行分布式日志处理的开发与实现

package main

import (
    "log"
    "os"

    "github.com/Shopify/sarama"
)

func main() {
    // 连接Kafka
    config := sarama.NewConfig()
    config.Producer.RequiredAcks = sarama.WaitForAll
    config.Producer.Partitioner = sarama.NewRandomPartitioner
    config.Producer.Return.Successes = true
    config.Producer.Return.Errors = true
    brokers := []string{"localhost:9092"}
    producer, err := sarama.NewSyncProducer(brokers, config)
    if err != nil {
        log.Fatalf("Failed to connect to Kafka: %v", err)
    }

    // 读取日志文件
    file, err := os.Open("log.txt")
    if err != nil {
        log.Fatalf("Failed to open log file: %v", err)
    }
    defer file.Close()

    // 逐行发送日志到Kafka
    scanner := bufio.NewScanner(file)
    for scanner.Scan() {
        message := scanner.Text()
        _, _, err := producer.SendMessage(&sarama.ProducerMessage{
            Topic: "logs",
            Value: sarama.StringEncoder(message),
        })
        if err != nil {
            log.Printf("Failed to send message to Kafka: %v", err)
        }
    }

    if err := scanner.Err(); err != nil {
        log.Fatalf("Failed to read log file: %v", err)
    }

    log.Println("Log collection completed.")
}

package main

import (
    "log"
    "os"
    "sync"
    "time"

    "github.com/Shopify/sarama"
)

func main() {
    consumer, err := sarama.NewConsumer([]string{"localhost:9092"}, nil)
    if err != nil {
        log.Fatalf("Failed to connect to Kafka: %v", err)
    }
    defer consumer.Close()

    partitionConsumer, err := consumer.ConsumePartition("logs", 0, sarama.OffsetNewest)
    if err != nil {
        log.Fatalf("Failed to consume logs partition: %v", err)
    }
    defer partitionConsumer.Close()

    done := make(chan bool)
    wg := sync.WaitGroup{}

    for i := 0; i < 3; i++ {
        wg.Add(1)
        go processLogs(partitionConsumer, &wg)
    }

    go func() {
        time.Sleep(10 * time.Second)
        close(done)
    }()

    wg.Wait()
    log.Println("Log processing completed.")
}

func processLogs(consumer sarama.PartitionConsumer, wg *sync.WaitGroup) {
    defer wg.Done()

    for {
        select {
        case <-done:
            return
        case message := <-consumer.Messages():
            log.Println("Processing log:", string(message.Value))
            // TODO: 根据日志的内容进行进一步处理
        }
    }
}

package main

import (
    "log"

    "github.com/olivere/elastic/v7"
)

func main() {
    client, err := elastic.NewClient(elastic.SetURL("http://localhost:9200"))
    if err != nil {
        log.Fatalf("Failed to connect to Elasticsearch: %v", err)
    }

    // 创建索引
    indexName := "logs"
    indexExists, err := client.IndexExists(indexName).Do(context.Background())
    if err != nil {
        log.Fatalf("Failed to check if index exists: %v", err)
    }
    if !indexExists {
        createIndex, err := client.CreateIndex(indexName).Do(context.Background())
        if err != nil {
            log.Fatalf("Failed to create index: %v", err)
        }
        if !createIndex.Acknowledged {
            log.Fatalf("Create index not acknowledged")
        }
    }

    // 存储日志
    _, err = client.Index().Index(indexName).BodyString(`{"message": "example log"}`).Do(context.Background())
    if err != nil {
        log.Fatalf("Failed to store log: %v", err)
    }

    // 查询日志
    searchResult, err := client.Search().Index(indexName).Query(elastic.NewMatchQuery("message", "example")).Do(context.Background())
    if err != nil {
        log.Fatalf("Failed to search logs: %v", err)
    }
    for _, hit := range searchResult.Hits.Hits {
        log.Printf("Log: %s", hit.Source)
    }

    log.Println("Log storage and querying completed.")
}