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bootstrap.sh
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bootstrap.sh
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#!/usr/bin/env bash
set -eo pipefail
[[ $TRACE ]] && set -x
# A script to bootstrap dokku.
# It expects to be run on Ubuntu 16.04/18.04/20.04, or CentOS 7 via 'sudo'
# If installing a tag higher than 0.3.13, it may install dokku via a package (so long as the package is higher than 0.3.13)
# It checks out the dokku source code from Github into ~/dokku and then runs 'make install' from dokku source.
# We wrap this whole script in functions, so that we won't execute
# until the entire script is downloaded.
# That's good because it prevents our output overlapping with wget's.
# It also means that we can't run a partially downloaded script.
SUPPORTED_VERSIONS="Debian [9, 10], CentOS [7], Ubuntu [16.04, 18.04, 20.04]"
log-fail() {
declare desc="log fail formatter"
echo "$@" 1>&2
exit 1
}
ensure-environment() {
local FREE_MEMORY
if [[ -z "$DOKKU_TAG" ]]; then
echo "Preparing to install $DOKKU_REPO..."
else
echo "Preparing to install $DOKKU_TAG from $DOKKU_REPO..."
fi
hostname -f >/dev/null 2>&1 || {
log-fail "This installation script requires that you have a hostname set for the instance. Please set a hostname for 127.0.0.1 in your /etc/hosts"
}
FREE_MEMORY=$(grep MemTotal /proc/meminfo | awk '{print $2}')
if [[ "$FREE_MEMORY" -lt 1003600 ]]; then
echo "For dokku to build containers, it is strongly suggested that you have 1024 megabytes or more of free memory"
echo "If necessary, please consult this document to setup swap: http://dokku.viewdocs.io/dokku/getting-started/advanced-installation/#vms-with-less-than-1-gb-of-memory"
fi
}
install-requirements() {
echo "--> Ensuring we have the proper dependencies"
case "$DOKKU_DISTRO" in
debian)
if ! dpkg -l | grep -q software-properties-common; then
apt-get update -qq >/dev/null
apt-get -qq -y --no-install-recommends install software-properties-common
fi
;;
ubuntu)
if ! dpkg -l | grep -q software-properties-common; then
apt-get update -qq >/dev/null
apt-get -qq -y --no-install-recommends install software-properties-common
fi
add-apt-repository universe >/dev/null
apt-get update -qq >/dev/null
;;
esac
}
install-dokku() {
if [[ -n $DOKKU_BRANCH ]]; then
install-dokku-from-source "origin/$DOKKU_BRANCH"
elif [[ -n $DOKKU_TAG ]]; then
local DOKKU_SEMVER="${DOKKU_TAG//v/}"
major=$(echo "$DOKKU_SEMVER" | awk '{split($0,a,"."); print a[1]}')
minor=$(echo "$DOKKU_SEMVER" | awk '{split($0,a,"."); print a[2]}')
patch=$(echo "$DOKKU_SEMVER" | awk '{split($0,a,"."); print a[3]}')
use_plugin=false
# 0.4.0 implemented a `plugin` plugin
if [[ "$major" -eq "0" ]] && [[ "$minor" -ge "4" ]] && [[ "$patch" -ge "0" ]]; then
use_plugin=true
elif [[ "$major" -ge "1" ]]; then
use_plugin=true
fi
# 0.3.13 was the first version with a debian package
if [[ "$major" -eq "0" ]] && [[ "$minor" -eq "3" ]] && [[ "$patch" -ge "13" ]]; then
install-dokku-from-package "$DOKKU_SEMVER"
echo "--> Running post-install dependency installation"
dokku plugins-install-dependencies
elif [[ "$use_plugin" == "true" ]]; then
install-dokku-from-package "$DOKKU_SEMVER"
echo "--> Running post-install dependency installation"
sudo -E dokku plugin:install-dependencies --core
else
install-dokku-from-source "$DOKKU_TAG"
fi
else
install-dokku-from-package
echo "--> Running post-install dependency installation"
sudo -E dokku plugin:install-dependencies --core
fi
}
install-dokku-from-source() {
local DOKKU_CHECKOUT="$1"
if ! command -v apt-get &>/dev/null; then
log-fail "This installation script requires apt-get. For manual installation instructions, consult http://dokku.viewdocs.io/dokku/advanced-installation/"
fi
apt-get -qq -y --no-install-recommends install sudo git make software-properties-common
cd /root
if [[ ! -d /root/dokku ]]; then
git clone "$DOKKU_REPO" /root/dokku
fi
cd /root/dokku
git fetch origin
[[ -n $DOKKU_CHECKOUT ]] && git checkout "$DOKKU_CHECKOUT"
make install
}
install-dokku-from-package() {
case "$DOKKU_DISTRO" in
debian | ubuntu)
install-dokku-from-deb-package "$@"
;;
centos | rhel)
install-dokku-from-rpm-package "$@"
;;
*)
log-fail "Unsupported Linux distribution. For manual installation instructions, consult http://dokku.viewdocs.io/dokku/advanced-installation/"
;;
esac
}
in-array() {
declare desc="return true if value ($1) is in list (all other arguments)"
local e
for e in "${@:2}"; do
[[ "$e" == "$1" ]] && return 0
done
return 1
}
install-dokku-from-deb-package() {
local DOKKU_CHECKOUT="$1"
local NO_INSTALL_RECOMMENDS=${DOKKU_NO_INSTALL_RECOMMENDS:=""}
local OS_ID
if ! in-array "$DOKKU_DISTRO_VERSION" "16.04" "18.04" "20.04" "9" "10"; then
log-fail "Unsupported Linux distribution. Only the following versions are supported: $SUPPORTED_VERSIONS"
fi
if [[ -n $DOKKU_DOCKERFILE ]]; then
NO_INSTALL_RECOMMENDS=" --no-install-recommends "
fi
echo "--> Initial apt-get update"
apt-get update -qq >/dev/null
apt-get -qq -y --no-install-recommends install apt-transport-https
if ! command -v docker &>/dev/null; then
echo "--> Installing docker"
if uname -r | grep -q linode; then
echo "--> NOTE: Using Linode? Docker may complain about missing AUFS support."
echo " You can safely ignore this warning."
echo " Installation will continue in 10 seconds."
sleep 10
fi
export CHANNEL=stable
wget -nv -O - https://get.docker.com/ | sh
fi
OS_ID="$(lsb_release -cs 2>/dev/null || echo "bionic")"
if ! in-array "$DOKKU_DISTRO" "debian" "ubuntu"; then
DOKKU_DISTRO="ubuntu"
OS_ID="bionic"
fi
if [[ "$DOKKU_DISTRO" == "ubuntu" ]]; then
OS_IDS=("xenial" "bionic" "focal")
if ! in-array "$OS_ID" "${OS_IDS[@]}"; then
OS_ID="bionic"
fi
elif [[ "$DOKKU_DISTRO" == "debian" ]]; then
OS_IDS=("stretch" "buster")
if ! in-array "$OS_ID" "${OS_IDS[@]}"; then
OS_ID="buster"
fi
fi
echo "--> Installing dokku"
wget -nv -O - https://packagecloud.io/dokku/dokku/gpgkey | apt-key add -
echo "deb https://packagecloud.io/dokku/dokku/$DOKKU_DISTRO/ $OS_ID main" | tee /etc/apt/sources.list.d/dokku.list
apt-get update -qq >/dev/null
[[ -n $DOKKU_VHOST_ENABLE ]] && echo "dokku dokku/vhost_enable boolean $DOKKU_VHOST_ENABLE" | sudo debconf-set-selections
[[ -n $DOKKU_WEB_CONFIG ]] && echo "dokku dokku/web_config boolean $DOKKU_WEB_CONFIG" | sudo debconf-set-selections
[[ -n $DOKKU_HOSTNAME ]] && echo "dokku dokku/hostname string $DOKKU_HOSTNAME" | sudo debconf-set-selections
[[ -n $DOKKU_SKIP_KEY_FILE ]] && echo "dokku dokku/skip_key_file boolean $DOKKU_SKIP_KEY_FILE" | sudo debconf-set-selections
[[ -n $DOKKU_KEY_FILE ]] && echo "dokku dokku/key_file string $DOKKU_KEY_FILE" | sudo debconf-set-selections
[[ -n $DOKKU_NGINX_ENABLE ]] && echo "dokku dokku/nginx_enable string $DOKKU_NGINX_ENABLE" | sudo debconf-set-selections
if [[ -n $DOKKU_CHECKOUT ]]; then
# shellcheck disable=SC2086
apt-get -qq -y $NO_INSTALL_RECOMMENDS install "dokku=$DOKKU_CHECKOUT"
else
# shellcheck disable=SC2086
apt-get -qq -y $NO_INSTALL_RECOMMENDS install dokku
fi
}
install-dokku-from-rpm-package() {
local DOKKU_CHECKOUT="$1"
if ! in-array "$DOKKU_DISTRO_VERSION" "7"; then
log-fail "Unsupported Linux distribution. Only the following versions are supported: $SUPPORTED_VERSIONS"
fi
echo "--> Installing docker"
curl -fsSL https://get.docker.com/ | sh
echo "--> Installing epel for nginx packages to be available"
yum install -y epel-release
echo "--> Installing herokuish and dokku"
curl -s https://packagecloud.io/install/repositories/dokku/dokku/script.rpm.sh | bash
if [[ -n $DOKKU_CHECKOUT ]]; then
yum -y install herokuish "dokku-$DOKKU_CHECKOUT"
else
yum -y install herokuish dokku
fi
echo "--> Enabling docker and nginx on system startup"
systemctl enable docker
systemctl enable nginx
echo "--> Starting nginx"
systemctl start nginx
}
main() {
export DOKKU_DISTRO DOKKU_DISTRO_VERSION
# shellcheck disable=SC1091
DOKKU_DISTRO=$(. /etc/os-release && echo "$ID")
# shellcheck disable=SC1091
DOKKU_DISTRO_VERSION=$(. /etc/os-release && echo "$VERSION_ID")
export DEBIAN_FRONTEND=noninteractive
export DOKKU_REPO=${DOKKU_REPO:-"https://github.com/dokku/dokku.git"}
ensure-environment
install-requirements
install-dokku
}
main "$@"