Real-time monitoring of data using MySQL in Go language

With the rapid development of Internet technology, the importance of data analysis and data monitoring has received more and more attention. The database is one of the important means of storing data. Therefore, during the development process, it is necessary to monitor changes in the database in real time in order to deal with problems in a timely manner. This article will introduce how to use MySQL in Go language to implement real-time monitoring of data.

1. Install MySQL

MySQL must be installed before using MySQL monitoring. I won’t go into details on how to install MySQL here.

2. Install the Go MySQL driver

If you want to connect to MySQL, you need to use the Go MySQL driver. It can be installed through go get:

go get -u github.com/go-sql-driver/mysql

After installing the driver, you can introduce the required packages:

import "database/sql"
import _ "github.com/go-sql-driver/mysql"

3. Connect to MySQL

Connect to MySQL The process is relatively simple. The following is an example of connecting to MySQL:

db, err := sql.Open("mysql", "user:password@tcp(localhost:3306)/database")

It should be noted that user here is your user name in MySQL, password is your MySQL password, localhost is the MySQL server address you are connected to, 3306 is the default port number of MySQL, and database is the database you need to connect to. name.

4. Monitoring MySQL database changes

After connecting to the MySQL database, we can achieve real-time monitoring of the MySQL database by monitoring the binlog file of the MySQL database.

Binlog is a binary log used by MySQL to record database data changes. It is essentially a backup of the internal data of the MySQL database. You can use the following command to open MySQL's binlog:

mysql> SHOW MASTER STATUS;

This command will output the name and location of the binlog file currently being used by MySQL.

In the Go language, we can use the go-mysql library to parse binlog information. Binlog information can be obtained through the following method:

import (

"flag"

"github.com/siddontang/go-mysql/mysql"
"github.com/siddontang/go-mysql/replication"

)

var (

flHost     = flag.String("h", "127.0.0.1", "MySQL Host")
flPort     = flag.Int("P", 3306, "MySQL Port")
flUser     = flag.String("u", "", "MySQL User")
flPassword = flag.String("p", "", "MySQL Password")

)

func main( ) {

// 连接 MySQL
config := mysql.NewConfig()
config.User = *flUser
config.Passwd = *flPassword
config.Net = "tcp"
config.Addr = fmt.Sprintf("%s:%d", *flHost, *flPort)
config.Flavor = "mysql"

conn, err := replication.NewBinlogSyncer(config)
if err != nil {
    panic(err)
}

streamer, err := conn.StartSync(mysql.Position{})
if err != nil {
    panic(err)
}

// 获取 binlog 信息
for {
    ev, err := streamer.GetEvent(context.Background())
    if err != nil {
        panic(err)
    }

    switch ev.Header.EventType {
        // 这里可以写自己需要的事件
        case replication.WRITE_ROWS_EVENTv1, replication.WRITE_ROWS_EVENTv2:
            rowsEvent := ev.Event.(*replication.RowsEvent)
            fmt.Printf("%v

", rowsEvent)

    }
}

}

Through the above method, we can obtain the change information of the MySQL database in real time.

To sum up, this article introduces how to use MySQL in Go language to realize real-time monitoring of data. In actual development, the obtained binlog information can be processed and analyzed according to specific needs to better realize data monitoring and Data analysis and other functions.

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