Create nightly Docker-in-LXD environment

dinlxd-nightly.sh

#!/bin/bash
# Create Docker-in-LXD environment
set -exu -o pipefail

if [[ $# -ne 1 ]]; then
    echo "Usage: $0 NAME"
    exit 1
fi
CONTAINER=$1
POOL=pool-dir

IMAGE=ubuntu:18.04

# Create pool if not created yet
# We use "dir" driver. /var/lib/lxd/storage-pools on the host needs to be ext4 or xfs.
lxc storage show $POOL > /dev/null 2>&1 || lxc storage create $POOL dir

# Remove existing container if any
lxc info $CONTAINER > /dev/null 2>&1 && lxc rm -f $CONTAINER

# Create container
lxc launch $IMAGE $CONTAINER -s $POOL -c security.nesting=true

# Cargo-cult sleep for networking (FIXME)
sleep 10

# Execute the script
cat <<EOF | lxc exec $CONTAINER -- sh -exu
for f in dockerd containerd containerd-shim ctr runc docker-init docker-proxy docker;do
    curl -o /usr/bin/\$f https://master.dockerproject.org/linux/x86_64/\$f
    chmod +x /usr/bin/\$f
done
groupadd docker
for f in docker.socket docker.service; do
    curl -o /lib/systemd/system/\$f https://raw.githubusercontent.com/moby/moby/master/contrib/init/systemd/\$f
done
systemctl daemon-reload
systemctl enable docker
systemctl start docker
EOF