Script to setup cluster of coreOS in VirtualBox

CoreOS_VB_Cluster.sh

#!/bin/bash

USAGE="Usage: $0 -h | [-n name-prefix] [-s size]
This script create cluster of size VBox VMs using default parameters.
Feel free to modify it.
Options:
    -h          This help
    -n          Name prefix for VMs (default: core)
    -s          Size of cluster (default: 3)
CREATEVDI_OPTS will be passed to create-coreos-vdi scripts
This tool creates a CoreOS VDI image to be used with VirtualBox.
"
PREFIX="core"
SIZE=3

: ${CREATEVDI_OPTS:="-V stable"}
while getopts "n:s:h" OPTION
do
    case $OPTION in
        n) PREFIX="$OPTARG" ;;
        s) SIZE=$OPTARG ;;
        h) echo "$USAGE"; exit;;
        *) exit 1;;
    esac
done

#загрузка образа диска
: ${IMAGE:=coreos_prod.vdi}
echo $IMAGE
if  [ ! -f $IMAGE ]
then
	if [ ! -f "create-coreos-vdi" ]
	then
		wget https://raw.githubusercontent.com/coreos/scripts/master/contrib/create-coreos-vdi
		chmod +x create-coreos-vdi
	fi
	source ./create-coreos-vdi $CREATEVDI_OPTS
  mv $VDI_IMAGE $IMAGE
fi

#генерация токена для инициализации кластера
TOKEN=$(curl http://discovery.etcd.io/new?size=$SIZE | sed 's|.*/||')

#шаблон cloud-config
CLOUD_CONFIG='#cloud-config
users:
  - name: "user"
    passwd: "$1$53YHkhSo$bvjpI.GPhDuC8pUfqAlrT."
    groups:
      - "sudo"
      - "docker"
    ssh-authorized-keys:
      - "<SSH_KEY>"
ssh_authorized_keys:
  - <SSH_KEY>
hostname: <HOSTNAME>
coreos:
  etcd2:
    advertise-client-urls: http://<IP>:2379,http://<IP>:4001
    initial-advertise-peer-urls: http://<IP>:2380
    discovery: https://discovery.etcd.io/<TOKEN>
    listen-peer-urls: http://<IP>:2380,http://<IP>:7001
    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
  units:
    - name: etcd2.service
      command: start
    - name: fleet.service
      command: start

    - name: static.network
      runtime: true
      content: |
        [Match]
        Name=enp0s3

        [Network]
        DNS=192.168.15.1
        Address=<IP>/24
        Gateway=192.168.15.1
#'
#добавление в конфиг ssh ключей
while read l; do
    if [ -z "$SSH_KEY" ]; then
        SSH_KEY="$l"
    else
        SSH_KEY="$SSH_KEY
  - $l"
    fi
done < ~/.ssh/id_rsa.pub

#заполнение конфига
CLOUD_CONFIG="${CLOUD_CONFIG//<SSH_KEY>/${SSH_KEY}}"
CLOUD_CONFIG="${CLOUD_CONFIG//<TOKEN>/${TOKEN}}"

#создание сети NAT для кластера
VBoxManage natnetwork remove --netname ${PREFIX}_net
VBoxManage natnetwork add --netname ${PREFIX}_net --network "192.168.15.0/24" --dhcp off --enable

#создание ВМ
for i in $(seq 1 $SIZE)
do

	NAME=$PREFIX$i
	CLOUD_CONFIG_x=$CLOUD_CONFIG
	public_ipv4="192.168.15.$((100+$i))"

  #заполнение конфига
	CLOUD_CONFIG_x="${CLOUD_CONFIG_x//<HOSTNAME>/${NAME}}"
	CLOUD_CONFIG_x="${CLOUD_CONFIG_x//<IP>/${public_ipv4}}"

	WORKDIR="tmp.${RANDOM}"
	mkdir "$WORKDIR"

	CONFIG_DIR="${WORKDIR}/openstack/latest"
	CONFIG_FILE="${CONFIG_DIR}/user_data"
	CONFIGDRIVE_FILE="$NAME.iso"

	mkdir -p "$CONFIG_DIR"
	touch ${CONFIG_FILE}
	cat > ${CONFIG_FILE} << EOL
${CLOUD_CONFIG_x}
EOL

  #создание config-drive
	mkisofs -R -V config-2 -o "$CONFIGDRIVE_FILE" "$WORKDIR"
	rm -rf $WORKDIR

  #клонирование образа диска
	 VBoxManage clonehd $IMAGE $NAME.vdi
	 VBoxManage modifyhd $NAME.vdi --resize 10240

  #настройка ВМ
	VBoxManage createvm --name $NAME --ostype Linux26_64 --register
	VBoxManage modifyvm $NAME --memory 1024
  #настройка сети
  VBoxManage modifyvm $NAME --nic1 natnetwork
	VBoxManage modifyvm $NAME --nat-network1 ${PREFIX}_net
	VBoxManage natnetwork modify --netname ${PREFIX}_net --port-forward-4 "ssh_$NAME:tcp:[]:$((1022+$i)):[$public_ipv4]:22"
  VBoxManage modifyvm $NAME --nic2 nat
  #проброс портов
  VBoxManage modifyvm $NAME --natpf2 "ssh_$NAME,tcp,127.0.0.1,$((2200+$i)),,22"
  #подключение образа диска
  VBoxManage storagectl $NAME --name "SATA Controller" --add sata --controller IntelAHCI
	VBoxManage storageattach  $NAME --storagectl "SATA Controller" --port 0 --device 0 --type hdd --medium  $NAME.vdi
  #подключение config-drive
  VBoxManage storagectl  $NAME --name "IDE Controller" --add ide
	VBoxManage storageattach $NAME  --storagectl "IDE Controller" --port 0 --device 0 --type dvddrive --medium $NAME.iso
done