Installing and running H2O flow on google colab using and access it ngrok, Don't forget setting ngrok auth key

h2o_flow.ipynb

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  "metadata": {
    "colab": {
      "name": "H2O_Flow",
      "version": "0.3.2",
      "provenance": [],
      "collapsed_sections": [],
      "include_colab_link": true
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    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
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    "accelerator": "GPU"
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  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
        "colab_type": "text"
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      "source": [
        "<a href=\"https://colab.research.google.com/gist/ahmedengu/7780e56e7ff42bbab53147e685c07f74/h2o_flow.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "metadata": {
        "id": "KFs57E-6hM8l",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "# Download h2o\n",
        "!wget -c http://h2o-release.s3.amazonaws.com/h2o/rel-xia/2/h2o-3.22.0.2.zip\n",
        "!unzip -n h2o-3.22.0.2.zip \n",
        "\n",
        "# Install ngrok\n",
        "! wget -q -c -nc https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip\n",
        "! unzip -qq -n ngrok-stable-linux-amd64.zip"
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "8MnDqhLPDsP1",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "NGROK_AUTH = \"NGROK_AUTH\"\n",
        "\n",
        "from time import sleep\n",
        "from IPython.display import clear_output\n",
        "import requests\n",
        "import json\n",
        "\n",
        "# keep everything running\n",
        "i=0\n",
        "while True:\n",
        "  try:\n",
        "    # start h2o\n",
        "    if len(get_ipython().getoutput('ps -ef | grep h2o')) <= 2:\n",
        "      get_ipython().system_raw('java -jar h2o-3.22.0.2/h2o.jar &')\n",
        "      sleep(5)\n",
        "\n",
        "    ngrok_link = json.loads(requests.get('http://localhost:4040/api/tunnels').text)['tunnels'][0]['public_url']\n",
        "    print(ngrok_link)\n",
        "    sleep(30)\n",
        "    requests.get(ngrok_link)\n",
        "  except (KeyboardInterrupt, SystemExit):\n",
        "      raise\n",
        "  except:\n",
        "    # create ngrok port\n",
        "    get_ipython().system_raw('./ngrok authtoken $NGROK_AUTH && ./ngrok http 54321 &')\n",
        "  i+=1\n",
        "  if i >=5:\n",
        "    clear_output(wait=True)\n",
        "    i=0\n"
      ],
      "execution_count": 0,
      "outputs": []
    }
  ]
}