Install docker on ubuntu trusty, wily, xenial

docker_install.sh

#!/bin/bash

# Check prerequisites for docker

if [ "$(uname -m)" != "x86_64" ]; then
  echo "Docker requires 64 bit host OS"
  exit 1
fi

kernel_version=$(uname -r | cut -d '.' -f 1-2)
if [ "${kernel_version%%.*}" -lt 3 ] || \
  ( [ "${kernel_version%%.*}" -eq 3 ] && \
    [ "${kernel_version##*.}" -lt 10 ] )
then
  echo "Kernel version >= 3.10 required, found ${kernel_version}"
  exit 1
fi

# Setup basic error handler

function EC () {
  echo -e "\e[1;31mError. Exit code $?\e[m"
}
trap EC ERR

# fail on error
set -e
# echo commands before they run
set -x

# ########################
# Install docker >= 1.11.2
# ########################

sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates

sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D

DISTRIB_CODENAME=$(grep DISTRIB_CODENAME /etc/lsb-release | cut -d '=' -f 2)
case "$DISTRIB_CODENAME" in
  'trusty' | 'wily' | 'xenial')
    echo "deb https://apt.dockerproject.org/repo ubuntu-${DISTRIB_CODENAME} main" | \
      sudo tee /etc/apt/sources.list.d/docker.list
    ;;
  'precise')
    echo "While precise is listed in Docker's install instructions,"
    echo "it is old and requires a trusty kernel so we are not supporting it"
    exit 1
    ;;
  *)
    echo "Unsupported distribution: ${DISTRIB_CODENAME}"
    exit 1
    ;;
esac

sudo apt-get update

case "$DISTRIB_CODENAME" in
  'trusty' | 'wily' | 'xenial')
    sudo apt-get install -y "linux-image-extra-$(uname -r)"
    ;;
esac

case "$DISTRIB_CODENAME" in
  'trusty')
    sudo apt-get install -y apparmor
    ;;
esac

sudo apt-get install -y docker-engine
sudo service docker start

# Enable service if using systemd (upstart automatically enables it)
if [ -d /run/systemd/system ]; then
  sudo systemctl enable docker
fi

sudo docker version