AWS EC2 – Linux – RHEL& – enable ENA as prerequisite from changing instance family type from C4 or R4 to C5 or R5
When upgrading AWS EC2 instances from C4 or R4 family to the C5 and R5 instance family types, you need to ensure the ENA is enabled for the network cards in advance.
Run these commands as outlined below with reference to:
sudo su - ec2-user /bin/bash sudo yum install pip sudo yum install awscli sudo yum install git git clone https://github.com/amzn/amzn-drivers cd ./amzn-drivers/kernel/linux/ena #Driver compilation: #=================== #Prerequisites: #RHEL sudo yum install gcc sudo yum install kernel-devel-$(uname -r) # Run "make [UBUNTU_ABI=<ABI>]" in the kernel/linux/ena/ folder. make # for rhel 7 # ena.ko is created inside the folder # Driver installation: # ==================== # loading driver: # --------------- insmod ena.ko # For automatic driver start upon the OS boot # RHEL / Open Suse / Ubuntu: # -------------------------- echo "ena">>/etc/modules-load.d/ena.conf depmod # if previous driver was loaded from initramfs - it will have to be updated as well (i.e. dracut) dracut -f -v # To avoid auto if names asignment by latest systemctl module sudo sed -i '/^GRUB\_CMDLINE\_LINUX/s/\"$/\ net\.ifnames\=0\"/' /etc/default/grub # Create new Grub grub2-mkconfig -o /boot/grub2/grub.cfg # Shutdown Server and Enable ENA from another server which has Admin Role aws ec2 modify-instance-attribute --instance-id 'i-03ff5ae675d8550e6' --ena-support
January 6, 2021