Here’s a simple way to search for a RDS instance in AWS via CLI.
aws rds describe-db-instances \ --db-instance-identifier rds-instance-name \ --region us-east-1 \ --profile my-account |
You may have to cycle through accounts and regions to find it.
describe-instances
AWS EC2 ENA Support
AWS has machine types that require ENA Support. You can run AWS CLI to find out if instance is ENA enabled.
aws ec2 describe-instances \ --instance-id i-xxxxxxxxxxxxxxxxx \ --profile default \ --region us-east-1 \ --query 'Reservations[].Instances[].EnaSupport' |
Login to the instance and verify.
sudo lspci | grep -i Amazon |
List driver details.
modinfo nvme |
Verify modules loaded at startup.
lsmod | grep nvme lsmod | grep ena |
If ENA drivers are missing, install them.
yum install pciutils |
AWS CLI Contains
The AWS CLI has a not so well-known comparison operator called “contains” which can be used to filter or query the output of your results. In this example, we want to show only instances that were not terminated.
Here’s a query containing “?!contains().”
aws ec2 describe-instances \ --query 'Reservations[*].Instances[?!contains(State.Name, `terminated`)].{Instance:InstanceId}' --output text |
AWS CLI Display Tags
This command lists the EC2 instance id and the tag name using query.
aws ec2 describe-instances \ --query 'Reservations[].Instances[].[InstanceId,Tags[?Key==Name]|[0].Value]' \ --profile tfc \ --region us-east-2 \ --output text |
Output:
i-xxxxxxxxxxxxxxxxx server-one i-xxxxxxxxxxxxxxxxx server-two i-xxxxxxxxxxxxxxxxx server-three |
|[0].Value insures output is one instance record per line.