#!/bin/bash -xe

UBUNTU_BASEURL="${UBUNTU_BASEURL:-"mirror://mirrors.ubuntu.com/mirrors.txt"}"

## Base packages and setup
export DEBIAN_FRONTEND=noninteractive
echo "exit 101" > /usr/sbin/policy-rc.d
chmod +x /usr/sbin/policy-rc.d

echo "Acquire::CompressionTypes::Order gz;" >/etc/apt/apt.conf.d/99compression-workaround-salt
echo "Acquire::EnableSrvRecords false;" >/etc/apt/apt.conf.d/99enablesrvrecords-false
echo "Acquire::http::Pipeline-Depth 0;" > /etc/apt/apt.conf.d/99aws-s3-mirrors-workaround-salt
echo "APT::Install-Recommends false;" > /etc/apt/apt.conf.d/99dont_install_recommends-salt
echo "APT::Install-Suggests false;" > /etc/apt/apt.conf.d/99dont_install_suggests-salt
echo "Acquire::Languages none;" > /etc/apt/apt.conf.d/99dont_acquire_all_languages-salt
echo "APT::Periodic::Update-Package-Lists 0;" > /etc/apt/apt.conf.d/99dont_update_package_list-salt
echo "APT::Periodic::Download-Upgradeable-Packages 0;" > /etc/apt/apt.conf.d/99dont_update_download_upg_packages-salt
echo "APT::Periodic::Unattended-Upgrade 0;" > /etc/apt/apt.conf.d/99disable_unattended_upgrade-salt

sysctl -w fs.file-max=100000
# Overwrite default mirrors
echo "deb [arch=amd64] ${UBUNTU_BASEURL} xenial main restricted multiverse universe" > /etc/apt/sources.list
echo "deb [arch=amd64] ${UBUNTU_BASEURL} xenial-updates main restricted multiverse universe" >> /etc/apt/sources.list
echo "deb [arch=amd64] ${UBUNTU_BASEURL} xenial-security main restricted multiverse universe" >> /etc/apt/sources.list
#echo "deb [arch=amd64] ${UBUNTU_BASEURL} xenial-backports main restricted multiverse universe" >> /etc/apt/sources.list

apt-get clean
apt-get update

# Useful tools
apt-get -y install byobu curl ethtool htop iputils-ping lsof strace tcpdump tmux traceroute tree vim-nox wget
# Install common prerequisites
apt-get -y install apt-transport-https libmnl0 python-apt python-m2crypto python-psutil

# Cleanup old kernels, ensure latest is installed via virtual package
if [ ! -f /tmp/no_install_kernel ]; then
    apt-get purge -y linux-image-* linux-headers-*
    apt-get install -y linux-image-virtual-lts-xenial linux-image-extra-virtual-lts-xenial

    # Update grub cmdline
    sed -i 's|GRUB_CMDLINE_LINUX_DEFAULT=.*|GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8"|g' /etc/default/grub
    sed -i 's|GRUB_CMDLINE_LINUX=.*|GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8"|g' /etc/default/grub
    update-grub
fi

apt-get -y upgrade
apt-get -y dist-upgrade

apt-get autoremove --purge

# Tmux fixes
cat << 'EOF' >> /etc/tmux.conf
set -g default-terminal "screen-256color"
set -g set-titles on
set -g xterm-keys on
EOF

# Setup cloud-init
apt-get -y install cloud-init

# Disable apt-daily
systemctl disable apt-daily.timer