Debian network optimization scripts.

deploy-google-bbr.sh

#!/bin/bash

# Author: Shi-Ken Don <shiken.don@gmail.com>
# Source: https://git.io/deploy-google-bbr.sh
# License: MIT

set -e
sudo -V > /dev/null || apt -y install sudo

if [[ ! -e /etc/sysctl.d/11-google-bbr.conf ]]; then
cat <<END | sudo tee /etc/sysctl.d/11-google-bbr.conf
# `/sbin/sysctl net.core.default_qdisc`
net.core.default_qdisc = fq
# `/sbin/sysctl net.ipv4.tcp_congestion_control`
net.ipv4.tcp_congestion_control = bbr
END
fi

sudo sysctl -p /etc/sysctl.d/11-google-bbr.conf

deploy-haproxy.sh

#!/bin/bash

# Author: Shi-Ken Don <shiken.don@gmail.com>
# Source: https://git.io/deploy-haproxy.sh
# License: MIT

EXPOSED_PORT=${EXPOSED_PORT:-25565}
BACKEND_HOST=${BACKEND_HOST:-1.2.3.4:25565}

set -e
sudo -V > /dev/null || apt -y install sudo

sudo apt -y install haproxy

if [[ ! -e /etc/haproxy/haproxy.cfg.bak ]]; then
  sudo /bin/cp /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
fi

sudo /bin/cp /etc/haproxy/haproxy.cfg.bak /etc/haproxy/haproxy.cfg

cat <<END | sudo tee -a /etc/haproxy/haproxy.cfg

listen minecraft
	bind :${EXPOSED_PORT}
	mode tcp
	balance leastconn
	option tcp-check
	server minecraft1 ${BACKEND_HOST} send-proxy
END

sudo systemctl enable haproxy
sudo systemctl restart haproxy

enable-rc-local.sh

#!/bin/bash

# Author: Shi-Ken Don <shiken.don@gmail.com>
# Source: https://git.io/enable-rc-local.sh
# License: MIT

set -e
sudo -V > /dev/null || apt -y install sudo

if [[ ! -e /etc/rc.local ]]; then
cat <<END | sudo tee /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# Load kernel variables from /etc/sysctl.d
/etc/init.d/procps restart

exit 0
END
fi

sudo chmod +x /etc/rc.local

install-stackdriver-agent.sh

#!/bin/bash

# Author: Shi-Ken Don <shiken.don@gmail.com>
# Source: https://git.io/install-stackdriver-agent.sh
# License: MIT

set -e
sudo -V > /dev/null || apt -y install sudo

curl -fsSO https://dl.google.com/cloudagents/add-monitoring-agent-repo.sh
sudo bash add-monitoring-agent-repo.sh
sudo apt -y update
sudo apt -y install stackdriver-agent
sudo systemctl enable stackdriver-agent
sudo systemctl start stackdriver-agent

update-apt.sh

#!/bin/bash

# Author: Shi-Ken Don <shiken.don@gmail.com>
# Source: https://git.io/update-apt.sh
# License: MIT

set -e
sudo -V > /dev/null || apt -y install sudo

while lsof /var/lib/dpkg/lock-frontend; do sleep 1; done
sudo apt -y remove unattended-upgrades
sudo apt -y update