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#!/bin/bash
just_installed=
if ! type -p docker; then
echo "Installing docker..."
type -p curl >dev/null ||
apt-get install -y curl </dev/null
curl -sSL https://get.docker.io | sh || exit 1
just_installed=1
fi
if [ -n "$just_installed" ]; then
need_restart=
docker_version=17
if ! [[ "$(docker --version)" == "Docker version $docker_version"* ]]; then
version="$(apt-cache madison docker-ce |
cut -f 2 -d \| |
grep "$docker_version" |
head -n 1 | xargs echo)"
## DOWNGRADE to 17.xx because 18.xx do not support registry v1
apt-get install -y docker-ce="$version"
need_restart=true
fi
if [ -n "$need_restart" ] && [ -z "$NO_DOCKER_RESTART" ]; then
systemctl daemon-reload &&
service docker restart
fi
fi