Mengonfigurasi sertifikat SSL untuk koneksi TCP menggunakan Go

Mengonfigurasi sertifikat SSL (Secure Sockets Layer) untuk koneksi TCP ke Cloud SQL untuk SQL Server menggunakan paket database/sql Go.

Contoh kode

Go

Untuk melakukan autentikasi ke Cloud SQL untuk SQL Server, siapkan Kredensial Default Aplikasi. Untuk mengetahui informasi selengkapnya, lihat Menyiapkan autentikasi untuk lingkungan pengembangan lokal.

package cloudsql

import (
	"database/sql"
	"fmt"
	"log"
	"os"
	"strings"

	_ "github.com/denisenkom/go-mssqldb"
)

// connectTCPSocket initializes a TCP connection pool for a Cloud SQL
// instance of SQL Server.
func connectTCPSocket() (*sql.DB, error) {
	mustGetenv := func(k string) string {
		v := os.Getenv(k)
		if v == "" {
			log.Fatalf("Fatal Error in connect_tcp.go: %s environment variable not set.\n", k)
		}
		return v
	}
	// Note: Saving credentials in environment variables is convenient, but not
	// secure - consider a more secure solution such as
	// Cloud Secret Manager (https://cloud.google.com/secret-manager) to help
	// keep secrets safe.
	var (
		dbUser    = mustGetenv("DB_USER")       // e.g. 'my-db-user'
		dbPwd     = mustGetenv("DB_PASS")       // e.g. 'my-db-password'
		dbTCPHost = mustGetenv("INSTANCE_HOST") // e.g. '127.0.0.1' ('172.17.0.1' if deployed to GAE Flex)
		dbPort    = mustGetenv("DB_PORT")       // e.g. '1433'
		dbName    = mustGetenv("DB_NAME")       // e.g. 'my-database'
	)

	dbURI := fmt.Sprintf("server=%s;user id=%s;password=%s;port=%s;database=%s;",
		dbTCPHost, dbUser, dbPwd, dbPort, dbName)

	// (OPTIONAL) Configure SSL certificates
	// For deployments that connect directly to a Cloud SQL instance without
	// using the Cloud SQL Proxy, configuring SSL certificates will ensure the
	// connection is encrypted.
	if dbRootCert, ok := os.LookupEnv("DB_ROOT_CERT"); ok { // e.g., '/path/to/my/server-ca.pem'
		// Get connection host name to be matched with host name in SSL certificate.
		var instanceConnectionName = mustGetenv("INSTANCE_CONNECTION_NAME")
		// Expected format of INSTANCE_CONNECTION_NAME is project_id:region:instance_name
		hostNameParts := strings.Split(instanceConnectionName, ":")
		if len(hostNameParts) != 3 {
			log.Fatalf("Invalid format for INSTANCE_CONNECTION_NAME environment variable, got = %q", instanceConnectionName)
		}
		// Specify encrypted connection, host name and certificate.
		dbURI += fmt.Sprintf("encrypt=true;hostnameincertificate=%s:%s;certificate=%s;",
			hostNameParts[0], hostNameParts[2], dbRootCert)
	}

	// dbPool is the pool of database connections.
	dbPool, err := sql.Open("sqlserver", dbURI)
	if err != nil {
		return nil, fmt.Errorf("sql.Open: %w", err)
	}

	// ...

	return dbPool, nil
}

Langkah berikutnya

Untuk menelusuri dan memfilter contoh kode untuk produk Google Cloud lainnya, lihat browser contohGoogle Cloud .