BBRV2 insallation experience on Google Cloud

[Yuanlai]

TCP BBRv2 alpha/preview release from Google team is based on Linux 5.13.12, so, I used Ubuntu 20.04 under VMware virtual machine

1. Prerequisite tools

sudo apt-get install libncurses-dev flex bison openssl libssl-dev dkms libelf-dev libudev-dev libpci-dev libiberty-dev autoconf

2. Enable port 22

sudo apt install openssh-server
sudo service ssh status

sudo apt install net-tools
sudo ufw enable
sudo ufw allow ssh
sudo ufw allow 22
sudo ufw status

(Reference link: https://linuxhint.com/fix_connection_refused_ubuntu/)

3. Waive sudo password

sudo su    
nano /etc/sudoers
change line "%sudo ...." to "%sudo ALL = (ALL:ALL) NOPASSWD:ALL"

4. Download BBRV2 preview release

git clone -o google-bbr -b v2alpha  https://github.com/google/bbr.git

(Reference link: https://github.com/google/bbr/tree/v2alpha)

5. Create VM instance on Google cloud

choose Ubuntu 20.04 version

Add ssh key of your VMware VM to google cloud(compute engine -> Metadata -> SSH KEYS)

(Reference link: https://cloud.google.com/compute/docs/connect/create-ssh-keys)

6. Install BBRv2 alpha to google cloud VM

ssh to the google cloud then exit google cloud VM(ssh "your vm username"@"google cloud external IP")

cd /bbr

./gce-install.sh -m (google cloud external IP)

7. Change the default kernel version to BBRv2 alpha

wait for one minute then ssh to the google cloud

(chagne grub config)
sudo nano /etc/default/grub.d/50-cloudimg-settings.cfg

change the GRUB_DEFAULT=0 to GRUB_DEFAULT="1>2" then Ctrl+X 

sudo update-grub

sudo reboot

8. Check the kernel version

wait for one minute then ssh to the google cloud

uname -r

should include "5.13.12+v2alpha"