Golang と RabbitMQ はシステム監視とアラームのソリューションを実装します

+-------------+          +--------------+           +--------------+          +--------------+
|   Monitor   |  ------->|    RabbitMQ  |---------->|   Processor  |--------->|    Notifier  |
+-------------+          +--------------+           +--------------+          +--------------+
                                          |                                    |
                                          |                                    |
                                       +--------------------------------------+
                                       |
                                       |
                                 +--------------+
                                 |    Database  |
                                 +--------------+

package main

import (
    "fmt"
    "log"
    "math/rand"
    "time"

    "github.com/streadway/amqp"
)

func main() {
    conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
    if err != nil {
        log.Fatalf("Failed to connect to RabbitMQ: %v", err)
    }
    defer conn.Close()

    ch, err := conn.Channel()
    if err != nil {
        log.Fatalf("Failed to open a channel: %v", err)
    }
    defer ch.Close()

    q, err := ch.QueueDeclare(
        "monitor_queue", // queue name
        false,           // durable
        false,           // delete when unused
        false,           // exclusive
        false,           // no-wait
        nil,             // arguments
    )
    if err != nil {
        log.Fatalf("Failed to declare a queue: %v", err)
    }

    for {
        cpuUsage := rand.Float64() * 100 // simulate CPU usage

        message := fmt.Sprintf("CPU usage: %.2f%%", cpuUsage)

        err = ch.Publish(
            "",     // exchange
            q.Name, // routing key
            false,  // mandatory
            false,  // immediate
            amqp.Publishing{
                ContentType: "text/plain",
                Body:        []byte(message),
            })
        if err != nil {
            log.Printf("Failed to publish a message: %v", err)
        }

        time.Sleep(5 * time.Second)
    }
}

package main

import (
    "fmt"
    "log"
    "math"
    "time"

    "github.com/streadway/amqp"
)

func main() {
    conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
    if err != nil {
        log.Fatalf("Failed to connect to RabbitMQ: %v", err)
    }
    defer conn.Close()

    ch, err := conn.Channel()
    if err != nil {
        log.Fatalf("Failed to open a channel: %v", err)
    }
    defer ch.Close()

    q, err := ch.QueueDeclare(
        "monitor_queue", // queue name
        false,           // durable
        false,           // delete when unused
        false,           // exclusive
        false,           // no-wait
        nil,             // arguments
    )
    if err != nil {
        log.Fatalf("Failed to declare a queue: %v", err)
    }

    msgs, err := ch.Consume(
        q.Name, // queue
        "",     // consumer
        true,   // auto-ack
        false,  // exclusive
        false,  // no-local
        false,  // no-wait
        nil,    // arguments
    )
    if err != nil {
        log.Fatalf("Failed to register a consumer: %v", err)
    }

    for msg := range msgs {
        cpuUsage := extractCPUUsage(msg.Body) // extract CPU usage from message

        if cpuUsage > 80 {
            err := sendAlert(fmt.Sprintf("High CPU usage: %.2f%%", cpuUsage))
            if err != nil {
                log.Printf("Failed to send alert: %v", err)
            }
        }
    }
}

func extractCPUUsage(body []byte) float64 {
    // parse message body and extract CPU usage value

    return 0.0
}

func sendAlert(message string) error {
    // send alert notification to admins or relevant personnel

    return nil
}

package main

import (
    "log"

    "github.com/streadway/amqp"
)

func main() {
    conn, err := amqp.Dial("amqp://guest:guest@localhost:5672/")
    if err != nil {
        log.Fatalf("Failed to connect to RabbitMQ: %v", err)
    }
    defer conn.Close()

    ch, err := conn.Channel()
    if err != nil {
        log.Fatalf("Failed to open a channel: %v", err)
    }
    defer ch.Close()

    q, err := ch.QueueDeclare(
        "alert_queue", // queue name
        false,         // durable
        false,         // delete when unused
        false,         // exclusive
        false,         // no-wait
        nil,           // arguments
    )
    if err != nil {
        log.Fatalf("Failed to declare a queue: %v", err)
    }

    msgs, err := ch.Consume(
        q.Name, // queue
        "",     // consumer
        true,   // auto-ack
        false,  // exclusive
        false,  // no-local
        false,  // no-wait
        nil,    // arguments
    )
    if err != nil {
        log.Fatalf("Failed to register a consumer: %v", err)
    }

    for msg := range msgs {
        log.Printf("Received alert: %s", msg.Body)
    }
}