如何在 CDK 中制作 Aurora Serverless 数据库

Question

我正在尝试制作一个极光无服务器数据库。在控制台中，它很简单，我只使用默认的子网组，一切都很好。

当我使用 cdk 时，我收到错误消息“Aurora Serverless 不支持子网位于同一可用区的数据库子网组。请选择子网位于不同可用区的数据库子网组。”。我曾尝试进行故障排除，但我真的不明白为什么它会失败，我猜它使用与我手动执行时相同的默认子网（并且它有效）？那为什么用cdk的时候突然全错了...

const auroraDatabaseCluster = new rds.ServerlessCluster(this, 'Database', {
    engine: rds.DatabaseClusterEngine.AURORA_POSTGRESQL,
    credentials: rds.Credentials.fromSecret(masterSecret),
    parameterGroup: clusterParameterGroup,
    defaultDatabaseName: databaseName,
    vpc: vpc,
    securityGroups: [databaseSecurityGroup],
    storageEncryptionKey: databaseKey,
    deletionProtection: false
  });

有人知道哪里出了问题吗？

我也可以使用区域极光数据库让它工作...

const auroraDatabaseCluster = new rds.DatabaseCluster(this, 'Database', {
    engine: rds.DatabaseClusterEngine.auroraPostgres({version: rds.AuroraPostgresEngineVersion.VER_11_8}),
    instances: 2, // TODO should be 2
    credentials: rds.Credentials.fromSecret(masterSecret),
    defaultDatabaseName: databaseName,
    port: endpointPort,
    storageEncrypted: true,
    storageEncryptionKey: databaseKey,
    deletionProtection: false, // TODO enable in prod
    parameterGroup: clusterParameterGroup,
    instanceProps: {
      instanceType: ec2.InstanceType.of(ec2.InstanceClass.BURSTABLE3, ec2.InstanceSize.MEDIUM),
      securityGroups: [databaseSecurityGroup],
      vpcSubnets: {
        subnetType: ec2.SubnetType.PRIVATE,
      },
      vpc,
    },
  });

Answer 1

我通过手动添加 onePerAZ=true 的数据库安全组解决了这个问题

const subnetGroup = new rds.SubnetGroup(this, "subnetGroup", {
        description: `Subnetgroup for serverless postgres aurora databasa`,
        vpc: vpc,
        vpcSubnets: {onePerAz: true},
      })

  const auroraDatabaseCluster = new rds.ServerlessCluster(this, 'Database', {
    engine: rds.DatabaseClusterEngine.AURORA_POSTGRESQL,
    credentials: rds.Credentials.fromSecret(masterSecret),
    parameterGroup: clusterParameterGroup,
    defaultDatabaseName: databaseName,
    vpc: vpc,
    subnetGroup: subnetGroup,
    securityGroups: [databaseSecurityGroup],
    storageEncryptionKey: databaseKey,
    deletionProtection: false
  });

如何在 CDK 中制作 Aurora Serverless 数据库

How to Make Aurora Serverless database in CDK

amazon-web-services

aws-cdk

aws-aurora-serverless