Unable to create read replica to aurora cluster using AWS CLI - amazon-web-services

Question

I'm trying to create read replica using the following command:
aws rds create-db-instance-read-replica --db-instance-identifier dbname-read --source-db-instance-identifier dbname --availability-zone us-east-1c
I'm getting the following error:
A client error (InvalidDBInstanceState) occurred when calling the CreateDBInstanceReadReplica operation: Automated backups are not enabled for this database instance. To enable automated backups, use ModifyDBInstance to set the backup retention period to a non-zero value.
I checked and the cluster is configured with automatic backups:
{
"DBInstances": [
{
"PubliclyAccessible": false,
"MasterUsername": "root",
"LicenseModel": "general-public-license",
"VpcSecurityGroups": [
{
"Status": "active",
"VpcSecurityGroupId": "sg"
}
],
"InstanceCreateTime": "2015-12-20T02:38:26.179Z",
"CopyTagsToSnapshot": false,
"OptionGroupMemberships": [
{
"Status": "in-sync",
"OptionGroupName": "default:aurora-5-6"
}
],
"PendingModifiedValues": {},
"Engine": "aurora",
"MultiAZ": false,
"DBSecurityGroups": [],
"DBParameterGroups": [
{
"DBParameterGroupName": "default.aurora5.6",
"ParameterApplyStatus": "in-sync"
}
],
"AutoMinorVersionUpgrade": true,
"PreferredBackupWindow": "03:44-04:14",
"DBSubnetGroup": {
"Subnets": [
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet",
"SubnetAvailabilityZone": {
"Name": "us-east-1a"
}
},
{
"SubnetStatus": "Active",
"SubnetIdentifier": "subnet",
"SubnetAvailabilityZone": {
"Name": "us-east-1c"
}
}
],
"DBSubnetGroupName": "dev-subnet-group",
"VpcId": "vpc",
"DBSubnetGroupDescription": "dev-subnet-group",
"SubnetGroupStatus": "Complete"
},
"ReadReplicaDBInstanceIdentifiers": [],
"AllocatedStorage": 1,
*"BackupRetentionPeriod": 7,*
"PreferredMaintenanceWindow": "mon:10:11-mon:10:41",
"Endpoint": {
"Port": 3306,
"Address": "dbname.us-east-1.rds.amazonaws.com"
},
"DBInstanceStatus": "available",
"EngineVersion": "5.6.10a",
"AvailabilityZone": "us-east-1a",
"DBClusterIdentifier": "dbname",
"StorageType": "aurora",
"DbiResourceId": "db-**********",
"CACertificateIdentifier": "rds-ca-2015",
"StorageEncrypted": false,
"DBInstanceClass": "db.r3.large",
"DbInstancePort": 0,
"DBInstanceIdentifier": "dbname"
}
]
}
Any idea?
Thanks,
Roey

Answer 1

Aurora engine doesn't support
create-db-instance-read-replica
instead just creating another instance using
create-db-instance
with the option --db-cluster-identifier.
So the newly created instance will automatically sync with the writer/master will be promoted to read only automatically.