Can't find the private IP address for my Amazon-RDS instance

Solution 1:

RDS instances can change their IPs unexpectedly, so they should not be used nor are they provided in the console or API (although you can technically dig for them). The DNS endpoint provided in the AWS console will resolve to the internal IPs from within Amazon's network.

Solution 2:

You can find a required info in the EC2 console.

1. Go to RDS Console
2. Select Databases and find required DB Instance. Open it and find details
3. Go to Connectivity & security and find VPC security groups
4. Go to EC2 Console
5. Select NETWORK & SECURITY → Network Interfaces
6. Filter by Security Group or just find an interface by Security group from 3rd point
7. Select found interface and look at Primary private IPv4 IP. This is internal ip-address which you required