I have Ubuntu 14.04 (CIS benchmark image, but I don't think it's related). I installed ENA according to http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/enhanced-networking-ena.html#test-enhanced-networking-ena. I imaged and relaunched my AMI as m4.x16large and I do have ENA active:

ethtool -i eth0
driver: ena
version: 1.5.0g

I ran update-initramfs (tried both '-u' and '-c'), created AMI, and tried to launch as c5.4xlarge. boot fails with:

Begin: Mounting root file system ... Begin: Running /scripts/local-top ... /scripts/local-top/cryptroot: line 24: dirname: not found


Gave up waiting for root device. 

Any ideas? TIA, Vitaly

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.