Amazon Elastic Network Adapter (ENA) on CentOS 7

gistfile1.txt

sudo su

yum --enablerepo=extras install epel-release
yum -y install patch dkms kernel-devel perl
yum update

#Required for kernel num 5:
yum --enablerepo=elrepo-kernel -y install kernel-ml-devel

reboot

#After reboot:
sudo su

###############Update kernel START###################
## Update to latest kernel - optional
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/ elrepo-release-7.0-5.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install kernel-ml

awk -F\' /^menuentry/{print\$2} /etc/grub2.cfg
#Note: In the list of kernels, identify the latest and remeber it's index (index starts from 0)
#In case the first item in the list (index=0) is the kernel you want to activate, run:
grub2-set-default 0
grub2-mkconfig -o /boot/grub2/grub.cfg

 vi /etc/default/grub
#change line:  GRUB_DEFAULT=saved  to GRUB_DEFAULT=0  
reboot

#verify current kernel via:
uname -a

#remove old kernels:
rpm -qa | grep kernel | sort
#for the kernels in the list , that you want to remove:
yum remove REPLACE_WITH_KERNEL_NAME

###############Update kernel END  ###################

reboot

sudo su


//TODO fetch latest ena_driver from: https://github.com/amzn/amzn-drivers/releases, this script is based on 2.2.9
cd /tmp
curl -o ena_linux_2.2.9.tar.gz https://codeload.github.com/amzn/amzn-drivers/tar.gz/ena_linux_2.2.9
tar zxvf ena_linux_2.2.9.tar.gz
mv amzn-drivers-ena_linux_2.2.9 /usr/src/ena-2.2.9

#Copy the bellow and paste in command line (lines 52-63):
cat <<EOF > /usr/src/ena-2.2.9/dkms.conf
PACKAGE_NAME="ena"
PACKAGE_VERSION="2.2.9"
AUTOINSTALL="yes"
REMAKE_INITRD="yes"
BUILT_MODULE_LOCATION[0]="kernel/linux/ena"
BUILT_MODULE_NAME[0]="ena"
DEST_MODULE_LOCATION[0]="/updates"
DEST_MODULE_NAME[0]="ena"
CLEAN="cd kernel/linux/ena; make clean"
MAKE="cd kernel/linux/ena; make BUILD_KERNEL=\${kernelver}"
EOF

dkms add -m ena -v 2.2.9
dkms build -m ena -v 2.2.9
dkms install -m ena -v 2.2.9

dracut -f --add-drivers ena

##Verification: 
modinfo ena
##### You should get similar info:  #####
#filename:       /lib/modules/5.7.2-1.el7.elrepo.x86_64/extra/ena.ko
#version:        2.2.9g
#license:        GPL
#description:    Elastic Network Adapter (ENA)
#author:         Amazon.com, Inc. or its affiliates
#srcversion:     CBF3F17443FAB1A53E24D56
#alias:          pci:v00001D0Fd0000EC21sv*sd*bc*sc*i*
#alias:          pci:v00001D0Fd0000EC20sv*sd*bc*sc*i*
#alias:          pci:v00001D0Fd00001EC2sv*sd*bc*sc*i*
#alias:          pci:v00001D0Fd00000EC2sv*sd*bc*sc*i*
#alias:          pci:v00001D0Fd00000051sv*sd*bc*sc*i*
#depends:
#retpoline:      Y
#name:           ena
#vermagic:       5.7.2-1.el7.elrepo.x86_64 SMP mod_unload modversions
#parm:           debug:Debug level (0=none,...,16=all) (int)
#parm:           rx_queue_size:Rx queue size. The size should be a power of 2. Max value is 8K
# (int)
#parm:           force_large_llq_header:Increases maximum supported header size in LLQ mode to 224 bytes, while reducing the maximum TX queue size by half.
# (int)
#parm:           num_io_queues:Sets number of RX/TX queues to allocate to device. The maximum value depends on the device and number of online CPUs.
# (int)

# The below is relevant only if the instance did not have ENA enabled before :
#Stop the instance and from another AWS  instance run:
aws ec2 modify-instance-attribute --region THE_INSTANCE_REGION --instance-id THE_INSTANCE_ID --ena-support
#e.g: aws ec2 modify-instance-attribute --region ap-southeast-1 --instance-id i-0123456789abcdef --ena-support

#Create an image from the instance
#Open the image on ENA supportive instance type (e.g. M5 , R4,.. ) 
#Validate interface:
ifconfig -s -a
#get Iface name, e.g: ens5
ethtool -i ens5
##### You should get similar info:  #####
#driver: ena
#version: 2.1.1g   ################## the ENA version #############
#firmware-version:
#expansion-rom-version:
#bus-info: 0000:00:05.0
#supports-statistics: yes
#supports-test: no
#supports-eeprom-access: no
#supports-register-dump: no
#supports-priv-flags: no

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FYI
Recent success result for modinfo ena
Represent as following

filename: /lib/modules/5.3.5-1.el7.elrepo.x86_64/extra/ena.ko
version: 2.1.1g
license: GPL
description: Elastic Network Adapter (ENA)
author: Amazon.com, Inc. or its affiliates
srcversion: F342F1BEE707726508E3DF8
alias: pci:v00001D0Fd0000EC21svsdbcsci*
alias: pci:v00001D0Fd0000EC20svsdbcsci*
alias: pci:v00001D0Fd00001EC2svsdbcsci*
alias: pci:v00001D0Fd00000EC2svsdbcsci*
depends:
retpoline: Y
name: ena
vermagic: 5.3.5-1.el7.elrepo.x86_64 SMP mod_unload modversions
parm: debug:Debug level (0=none,...,16=all) (int)
parm: rx_queue_size:Rx queue size. The size should be a power of 2. Max value is 8K
(int)
parm: force_large_llq_header:Increases maximum supported header size in LLQ mode to 224 bytes, while reducing the maximum TX queue size by half.
(int)

updated to version 2.2.9