AWS: RDS - 1

RDS

Amazon Relational Database Service (Amazon RDS) makes it easy to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while automating time-consuming administration tasks such as hardware provisioning, database setup, patching and backups.

Backup & Restore SQL Server

Backup database to S3

• Assumption

  • DB name: sample_db
  • S3 bucket name: sql-server-backup

• Backup with built-in stored proc

  exec msdb.dbo.rds_backup_database 
  @source_db_name='sample_db', 
  @s3_arn_to_backup_to='arn:aws:s3:::sql-server-backup/sample_db_20191221.bak', 
  @overwrite_S3_backup_file=1;
  

• Track status

  exec msdb.dbo.rds_task_status @db_name='sample_db'
  

Restore DB into EC2

• Restore with powershell

  #Copy-S3Object -BucketName 'nsw-prod-s3-sql-backups' \ 
  # -Key sample_db-20190531011003.bak \
  # -LocalFile L:\Backups\Automated\sample_db-20190531011003.bak
  
  Restore-SqlDatabase -ServerInstance 'localhost' -Database "sample_db" \
  -BackupFile "L:\Backups\Automated\sample_db-20190531011003.bak" \
  -ReplaceDatabase -KeepReplication -Verbose
  

Restore DB into RDS

• Create IAM role which can access the backup file in the S3 bucket. e.g. RDS_RESTORE_S3_READONLY

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket",
                "s3:GetBucketLocation"
            ],
            "Resource": [
                "arn:aws:s3:::sql-server-backup"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObjectMetaData",
                "s3:GetObject",
                "s3:PutObject",
                "s3:ListMultipartUploadParts",
                "s3:AbortMultipartUpload"
            ],
            "Resource": [
                "arn:aws:s3:::sql-server-backup/*"
            ]
        }
    ]
}

• Create a new option group, or copy or modify an existing option group.

• Add the SQLSERVER_BACKUP_RESTORE option to the option group.

• Associate the IAM role with the option. The IAM role must have access to an S3 bucket to store the database backups. e.g. RDS_RESTORE_S3_READONLY

• Associate the option group with the DB instance.

• Make sure the RDS has enough space to restore the db backup.

• Restore the database

EXEC msdb.dbo.rds_restore_database 
@restore_db_name='sample_db',
@s3_arn_to_restore_from='arn:aws:s3:::sql-server-backup/sample_db_20191221.bak'
GO

• Check the progress

EXEC msdb.dbo.rds_task_status 
@db_name='sample_db'
GO

Caveat

• After you modify the storage size for a DB instance, the status of the DB instance is storage-optimization. The DB instance is fully operational after a storage modification.

• You can’t make further storage modifications until six (6) hours after storage optimization has completed on the instance.

• You can’t reduce the amount of storage for a DB instance after storage has been allocated.

Rename database

• Rename db with built-in stored proc

EXEC rdsadmin.dbo.rds_modify_db_name N'<OldName>', N'<NewName>'

• Troubleshoot -The database could not be exclusively locked to perform the operation.

# Kill connection
EXEC sp_who 
GO

KILL <spid>
GO

EXEC sp_who 
GO