bootstrap-host.sh

#!/bin/bash
#
# Configure broken host machine to run correctly
#
set -ex

DYNAMIC_IMAGE=${DYNAMIC_IMAGE:-dualitysolutions/dynamicd}

distro=$1
shift

memtotal=$(grep ^MemTotal /proc/meminfo | awk '{print int($2/1024) }')

#
# Only do swap hack if needed
#
if [ $memtotal -lt 2048 -a $(swapon -s | wc -l) -lt 2 ]; then
    fallocate -l 2048M /swap || dd if=/dev/zero of=/swap bs=1M count=2048
    mkswap /swap
    grep -q "^/swap" /etc/fstab || echo "/swap swap swap defaults 0 0" >> /etc/fstab
    swapon -a
fi

free -m

if [ "$distro" = "xenial" -o "$distro" = "ubuntu:16.04" ]; then
    curl https://get.docker.io/gpg | apt-key add -
    echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list

    # Handle other parallel cloud init scripts that may lock the package database
    # TODO: Add timeout
    while ! apt-get update; do sleep 10; done

    while ! apt-get install -y lxc-docker; do sleep 10; done
fi

# Always clean-up, but fail successfully
docker kill dynamicd-node 2>/dev/null || true
docker rm dynamicd-node 2>/dev/null || true
stop docker-dynamicd 2>/dev/null || true

# Always pull remote images to avoid caching issues
if [ -z "${DYNAMIC_IMAGE##*/*}" ]; then
    docker pull $DYNAMIC_IMAGE
fi

# Initialize the data container
docker volume create --name=dynamicd-data
docker run -v dynamicd-data:/dynamic --rm $DYNAMIC_IMAGE dynamic_init

# Start dynamicd via upstart and docker
curl https://raw.githubusercontent.com/duality-solutions/docker-dynamicd/master/upstart.init > /etc/init/docker-dynamicd.conf
start docker-dynamicd

set +ex
echo "Resulting dynamic.conf:"
docker run -v dynamicd-data:/dynamic --rm $DYNAMIC_IMAGE cat /dynamic/.dynamic/dynamic.conf