cloud engineer
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' |
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 |
sudo lspci | grep -i Amazon
List driver details.
modinfo nvme |
modinfo nvme
Verify modules loaded at startup.
lsmod | grep nvme lsmod | grep ena |
lsmod | grep nvme lsmod | grep ena
If ENA drivers are missing, install them.
yum install pciutils |
yum install pciutils
When changing machine types, you may be asked to enable the latest ENA driver for Enhanced Network Support on an Amazon EC2 instance. There are several instructions depending on the Linux OS flavor. Here are the instructions to enable. In some cases, you may need to rebuild the kernel module. To verify that the ena module is installed, use the modinfo command as shown in the following example.
modinfo ena |
modinfo ena
You also may have to enable the enhanced networking attribute on the instance.
aws ec2 modify-instance-attribute --instance-id instance_id --ena-support |
aws ec2 modify-instance-attribute --instance-id instance_id --ena-support