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[rds] invalid default username when using Aurora PostgresSql #10579

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shivlaks opened this issue Sep 28, 2020 · 2 comments · Fixed by #10597
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[rds] invalid default username when using Aurora PostgresSql #10579

shivlaks opened this issue Sep 28, 2020 · 2 comments · Fixed by #10597
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@skinny85
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@aws-cdk/aws-rds Related to Amazon Relational Database bug This issue is a bug. effort/small Small work item – less than a day of effort p1
Milestone
[GA] RDS

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@shivlaks
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We recently added a property credentials to represent the master username and password.
It's an optional property with a default value of admin for the username.

Reproduction Steps

const cluster = new rds.DatabaseCluster(this, 'Database', {
      engine: rds.DatabaseClusterEngine.AURORA_POSTGRESQL,
      instanceProps: {
        instanceType: ec2.InstanceType.of(ec2.InstanceClass.T3, ec2.InstanceSize.MEDIUM),
        vpc,
        vpcSubnets: { subnetType: ec2.SubnetType.PRIVATE },
      },
      defaultDatabaseName: 'database123',
      parameterGroup: rds.ParameterGroup.fromParameterGroupName(this, 'ParameterGroup', 'default.aurora-postgresql11'),
      instances: 1,
      s3ImportBuckets: [importBucket], 
    });

What did you expect to happen?

Successful deployment when using default property for master username and password.
Specifying

What actually happened?

MasterUsername admin cannot be used as it is a reserved word used by the engine
(Service: AmazonRDS; Status Code: 400; Error Code: InvalidParameterValue; Request ID: 37defeec-5b54-4541-ac05-6b5e92412ab2; Proxy: null)

Environment

  • CLI Version : 1.63.0
  • Framework Version:
  • Node.js Version: v14.8.0
  • OS : Mac OS 10.15.6
  • Language (Version): TypeScript (3.8.3)

Other

This is 🐛 Bug Report
@shivlaks shivlaks added bug This issue is a bug. p1 effort/small Small work item – less than a day of effort needs-triage This issue or PR still needs to be triaged. labels Sep 28, 2020
@github-actions github-actions bot added the @aws-cdk/aws-rds Related to Amazon Relational Database label Sep 28, 2020
@skinny85 skinny85 added this to the [GA] RDS milestone Sep 28, 2020
@jogold
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jogold commented Sep 29, 2020 •
edited
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Already discussed here #5076

@skinny85
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Thanks @jogold , sometimes we don't learn 😉.

I'll be working on a fix for this today.

@SomayaB SomayaB removed the needs-triage This issue or PR still needs to be triaged. label Sep 29, 2020
skinny85 added a commit to skinny85/aws-cdk that referenced this issue Sep 29, 2020
@skinny85
fix(rds): default username 'admin' doesn't work for PostgreSQL
ce42e7b 
In aws#10458, we started to default the master user name to 'admin'.
As it turns out, that actually doesn't work with PostgreSQL,
as 'admin' is a reserved word there.
Add a new optional property to IEngine called defaultUsername
that allows overriding the global 'admin' default on a per-Engine basis.
Set it to 'adminuser' for the Aurora Postgres Cluster engine and the Instance engine.

Fixes aws#10579
@skinny85 skinny85 mentioned this issue Sep 29, 2020
Merged
@mergify mergify bot closed this as completed in #10597 Sep 30, 2020
mergify bot pushed a commit that referenced this issue Sep 30, 2020
@skinny85
fix(rds): default username 'admin' doesn't work for PostgreSQL (#10597)
8a04014 
In #10458, we started to default the master user name to 'admin'.
As it turns out, that actually doesn't work with PostgreSQL,
as 'admin' is a reserved word there.
Add a new optional property to IEngine called defaultUsername
that allows overriding the global 'admin' default on a per-Engine basis.
Set it to 'adminuser' for the Aurora Postgres Cluster engine and the Postgres Instance engine.

Fixes #10579

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
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@skinny85 skinny85

Labels
@aws-cdk/aws-rds Related to Amazon Relational Database bug This issue is a bug. effort/small Small work item – less than a day of effort p1
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[GA] RDS
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fix(rds): default username 'admin' doesn't work for PostgreSQL skinny85/aws-cdk
4 participants
@skinny85 @jogold @SomayaB @shivlaks