Créer une connexion à l'aide du connecteur Cloud SQL Go
Restez organisé à l'aide des collections
Enregistrez et classez les contenus selon vos préférences.
Ouvrez une connexion à Cloud SQL pour Postgres à l'aide du connecteur Cloud SQL Go.
En savoir plus
Pour obtenir une documentation détaillée incluant cet exemple de code, consultez la page suivante :
Exemple de code
Sauf indication contraire, le contenu de cette page est régi par une licence Creative Commons Attribution 4.0, et les échantillons de code sont régis par une licence Apache 2.0. Pour en savoir plus, consultez les Règles du site Google Developers. Java est une marque déposée d'Oracle et/ou de ses sociétés affiliées.
[[["Facile à comprendre","easyToUnderstand","thumb-up"],["J'ai pu résoudre mon problème","solvedMyProblem","thumb-up"],["Autre","otherUp","thumb-up"]],[["Difficile à comprendre","hardToUnderstand","thumb-down"],["Informations ou exemple de code incorrects","incorrectInformationOrSampleCode","thumb-down"],["Il n'y a pas l'information/les exemples dont j'ai besoin","missingTheInformationSamplesINeed","thumb-down"],["Problème de traduction","translationIssue","thumb-down"],["Autre","otherDown","thumb-down"]],[],[],[],null,["# Create a connection using the Cloud SQL Go Connector\n\nOpen a connection to Cloud SQL for Postgres by using the Cloud SQL Go Connector.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Connect from App Engine flexible environment](/sql/docs/postgres/connect-app-engine-flexible)\n- [Connect from App Engine standard environment](/sql/docs/postgres/connect-app-engine-standard)\n- [Connect from Cloud Run](/sql/docs/postgres/connect-run)\n- [Connect from Cloud Run functions](/sql/docs/postgres/connect-functions)\n- [Connect using Cloud SQL Language Connectors](/sql/docs/postgres/connect-connectors)\n\nCode sample\n-----------\n\n### Go\n\n\nTo authenticate to Cloud SQL for PostgreSQL, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n package cloudsql\n\n import (\n \t\"context\"\n \t\"database/sql\"\n \t\"fmt\"\n \t\"log\"\n \t\"net\"\n \t\"os\"\n\n \t\"cloud.google.com/go/cloudsqlconn\"\n \t\"github.com/jackc/pgx/v5\"\n \t\"github.com/jackc/pgx/v5/stdlib\"\n )\n\n func connectWithConnector() (*sql.DB, error) {\n \tmustGetenv := func(k string) string {\n \t\tv := os.Getenv(k)\n \t\tif v == \"\" {\n \t\t\tlog.Fatalf(\"Fatal Error in connect_connector.go: %s environment variable not set.\\n\", k)\n \t\t}\n \t\treturn v\n \t}\n \t// Note: Saving credentials in environment variables is convenient, but not\n \t// secure - consider a more secure solution such as\n \t// Cloud Secret Manager (https://cloud.google.com/secret-manager) to help\n \t// keep passwords and other secrets safe.\n \tvar (\n \t\tdbUser = mustGetenv(\"DB_USER\") // e.g. 'my-db-user'\n \t\tdbPwd = mustGetenv(\"DB_PASS\") // e.g. 'my-db-password'\n \t\tdbName = mustGetenv(\"DB_NAME\") // e.g. 'my-database'\n \t\tinstanceConnectionName = mustGetenv(\"INSTANCE_CONNECTION_NAME\") // e.g. 'project:region:instance'\n \t\tusePrivate = os.Getenv(\"PRIVATE_IP\")\n \t)\n\n \tdsn := fmt.Sprintf(\"user=%s password=%s database=%s\", dbUser, dbPwd, dbName)\n \tconfig, err := pgx.ParseConfig(dsn)\n \tif err != nil {\n \t\treturn nil, err\n \t}\n \tvar opts []cloudsqlconn.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_Option\n \tif usePrivate != \"\" {\n \t\topts = append(opts, cloudsqlconn.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_Option_WithDefaultDialOptions(cloudsqlconn.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_DialOption_WithPrivateIP()))\n \t}\n \t// WithLazyRefresh() Option is used to perform refresh\n \t// when needed, rather than on a scheduled interval.\n \t// This is recommended for serverless environments to\n \t// avoid background refreshes from throttling CPU.\n \topts = append(opts, cloudsqlconn.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_Option_WithLazyRefresh())\n \td, err := cloudsqlconn.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_Dialer_NewDialer(context.Background(), opts...)\n \tif err != nil {\n \t\treturn nil, err\n \t}\n \t// Use the Cloud SQL connector to handle connecting to the instance.\n \t// This approach does *NOT* require the Cloud SQL proxy.\n \tconfig.DialFunc = func(ctx context.Context, network, instance string) (net.Conn, error) {\n \t\treturn d.https://cloud.google.com/go/docs/reference/cloud.google.com/go/cloudsqlconn/latest/index.html#cloud_google_com_go_cloudsqlconn_Dialer_Dial(ctx, instanceConnectionName)\n \t}\n \tdbURI := stdlib.RegisterConnConfig(config)\n \tdbPool, err := sql.Open(\"pgx\", dbURI)\n \tif err != nil {\n \t\treturn nil, fmt.Errorf(\"sql.Open: %w\", err)\n \t}\n \treturn dbPool, nil\n }\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=cloud_sql_postgres)."]]