RDS instance in private subnet

0 votes

Given a VPC, can I not explicitly mention which subnets the RDS instance should exist?

I have created a VPC 10.0.0.0/24 with three subnets as shown below:

  • REST servers - 10.0.0.0/25

  • RDS - AZ1 - 10.0.0.128/26

  • RDS - AZ2 - 10.0.0.192/26

When creating the DB, I am able to provide the VPC name. It seems, all subnets of this VPC are automatically selected. I am not able to specify the two subnets (as shown in the list above). There is an option for public accessibility which I have set to No. Therefore, even though all subnets seem to be applied for this RDS instance, it seems that, it will be accessible only from the REST servers subnet.

Jul 30, 2018 in AWS by bug_seeker
• 15,320 points
81 views

1 answer to this question.

0 votes

You need to create a new subnet group and assign it while creating a new RDS. Make note that existing RDS doesn't reflect when you change the subnet group, hence you need to create a new one.

answered Jul 30, 2018 by Priyaj
• 56,200 points

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