Startup script associated with a google compute engine VM instance to install, initialize, and start a Lisk node

instance.json

{
  "canIpForward": false,
  "cpuPlatform": "Intel Haswell",
  "creationTimestamp": "2017-11-20T05:44:33.666-08:00",
  "deletionProtection": false,
  "description": "",
  "disks": [
    {
      "autoDelete": true,
      "boot": true,
      "deviceName": "uncartel-001",
      "index": 0,
      "interface": "SCSI",
      "kind": "compute#attachedDisk",
      "licenses": [
        "projects/ubuntu-os-cloud/global/licenses/ubuntu-1604-xenial"
      ],
      "mode": "READ_WRITE",
      "source": "projects/uncartel/zones/us-east1-b/disks/uncartel-001",
      "type": "PERSISTENT"
    }
  ],
  "id": "REDACTED",
  "kind": "compute#instance",
  "labelFingerprint": "REDACTED=",
  "machineType": "projects/uncartel/zones/us-east1-b/machineTypes/g1-small",
  "name": "uncartel-001",
  "networkInterfaces": [
    {
      "accessConfigs": [
        {
          "kind": "compute#accessConfig",
          "name": "External NAT",
          "natIP": "REDACTED",
          "type": "ONE_TO_ONE_NAT"
        }
      ],
      "fingerprint": "REDACTED",
      "kind": "compute#networkInterface",
      "name": "nic0",
      "network": "projects/uncartel/global/networks/default",
      "networkIP": "REDACTED",
      "subnetwork": "projects/uncartel/regions/us-east1/subnetworks/default"
    }
  ],
  "scheduling": {
    "automaticRestart": false,
    "onHostMaintenance": "TERMINATE",
    "preemptible": false
  },
  "selfLink": "projects/uncartel/zones/us-east1-b/instances/uncartel-001",
  "serviceAccounts": [
    {
      "email": "REDACTED",
      "scopes": [
        "https://www.googleapis.com/auth/cloud-platform"
      ]
    }
  ],
  "startRestricted": false,
  "status": "RUNNING",
  "tags": {
    "fingerprint": "REDACTED"
  },
  "zone": "projects/uncartel/zones/us-east1-b",
  "metadata": {
    "kind": "compute#metadata",
    "fingerprint": "REDACTED",
    "items": [
      {
        "key": "startup-script-url",
        "value": "gs://lisk-scripts/startup.sh"
      },
      {
        "key": "shutdown-script-url",
        "value": "gs://lisk-scripts/shutdown.sh"
      }
    ]
  }
}

startup.sh

#!/bin/bash
if [[ -f "/etc/redhat-release" ]]; then
  yum update
  yum install curl wget tar sudo unzip zip
elif [[ -f "/etc/debian_version" ]]; then
  apt-get update
  apt-get -y install curl wget tar sudo unzip zip pwgen
fi

# check to see if lisk has been installed already
if [[ -d "/home/lisk" ]]; then
  echo "Lisk is already installed. Starting Lisk..."

  LPW=`pwgen -N1`
  echo lisk:$LPW | /usr/sbin/chpasswd

  echo $LPW | sudo -i -u lisk bash /home/lisk/lisk-main/lisk.sh start


  exit
else
  echo "Lisk not detected.  Installing..."

  useradd -d /home/lisk -m lisk
  groupadd sudo
  usermod -a -G sudo lisk

  LPW=`pwgen -N1`

  echo lisk:$LPW | /usr/sbin/chpasswd

  echo "%sudo   ALL=(ALL:ALL) ALL" >> /etc/sudoers

  if [[ -f "/etc/redhat-release" ]]; then
    localedef -v -c -i en_US -f UTF-8 en_US.UTF-8
    localectl set-locale LANG=en_US.UTF-8
  elif [[ -f "/etc/debian_version" ]]; then
    locale-gen en_US.UTF-8
    update-locale LANG=en_US.UTF-8
  fi


  #############
  # use this if you are generating your own backups and storing them in google storage buckets
  #echo $LPW | sudo -i -u lisk gsutil cp `gsutil ls -lh gs://lisk-backups | awk '/gs:/{print $4}' | tail -n 1` blockchain.db.gz
  #echo $LPW | sudo -i -u lisk bash installLisk.sh install -r main -h -u file:///home/lisk 

  echo $LPW | sudo -i -u lisk wget https://downloads.lisk.io/lisk/main/installLisk.sh
  echo $LPW | sudo -i -u lisk bash installLisk.sh install -r main -h -u https://lisktools.io/backups/ 
fi