Membuat kumpulan koneksi asinkron dengan autentikasi database IAM

Cuplikan ini membuat pool koneksi asinkron SQLAlchemy menggunakan Konektor AlloyDB. Gunakan metode ini untuk terhubung secara aman ke instance database Anda dengan pengguna IAM, sehingga Anda tidak perlu mengelola sandi database.

Contoh kode

Python

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

import sqlalchemy
import sqlalchemy.ext.asyncio

from google.cloud.alloydbconnector import AsyncConnector


async def create_sqlalchemy_engine(
    inst_uri: str, user: str, db: str, refresh_strategy: str = "background"
) -> tuple[sqlalchemy.ext.asyncio.engine.AsyncEngine, AsyncConnector]:
    """Creates a connection pool for an AlloyDB instance and returns the pool
    and the connector. Callers are responsible for closing the pool and the
    connector.

    A sample invocation looks like:

        pool, connector = await create_sqlalchemy_engine(
            inst_uri,
            user,
            db,
        )
        async with pool.connect() as conn:
            time = (await conn.execute(sqlalchemy.text("SELECT NOW()"))).fetchone()
            conn.commit()
            curr_time = time[0]
            # do something with query result
            await connector.close()

    Args:
        instance_uri (str):
            The instance URI specifies the instance relative to the project,
            region, and cluster. For example:
            "projects/my-project/locations/us-central1/clusters/my-cluster/instances/my-instance"
        user (str):
            The formatted IAM database username.
            e.g., my-email@test.com, service-account@project-id.iam
        db (str):
            The name of the database, e.g., mydb
        refresh_strategy (Optional[str]):
            Refresh strategy for the AlloyDB Connector. Can be one of "lazy"
            or "background". For serverless environments use "lazy" to avoid
            errors resulting from CPU being throttled.
    """
    connector = AsyncConnector(refresh_strategy=refresh_strategy)

    # create async SQLAlchemy connection pool
    engine = sqlalchemy.ext.asyncio.create_async_engine(
        "postgresql+asyncpg://",
        async_creator=lambda: connector.connect(
            inst_uri,
            "asyncpg",
            user=user,
            db=db,
            enable_iam_auth=True,
        ),
        execution_options={"isolation_level": "AUTOCOMMIT"},
    )
    return engine, connector

Langkah berikutnya

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