AWS CLI: Getting total available RDS instances & S3 buckets

I am trying to write a script that would save me going to the web Console every time I need checking how many RDS instances & S3 buckets I can create.

In the RDS section, there is a DB Instances (20/50) title, I need to get both the 20 and the 50
In the S3 bucket section, there is the total number of buckets. The implied max number is 100, but my company has increased it to 150. I need the number and the limit (as above).

Is that possible?

Solution

You can use AWS CLI to get all of these values.

In the RDS section, there is a DB Instances (20/50) title, I need to get both the 20 and the 50

Get the total number of RDS instances you can create:

aws service-quotas get-service-quota \  
    --service-code rds \  
    --quota-code L-7B6409FD

Get the current number of running RDS instances:

aws rds describe-db-instances --region us-east-1 | grep DBInstanceIdentifier | wc -l

In the S3 bucket section, there is the total number of buckets. The implied max number is 100, but my company has increased it to 150. I need the number and the limit (as above).

Get the total number of S3 buckets you can create:

aws service-quotas get-service-quota \  
    --service-code s3 \  
    --quota-code L-DC2B2D3D

Get the current number of S3 bucket:

aws s3api list-buckets | grep -w Name | wc -l