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   "source": [
    "How to create and use a Secret\n",
    "================\n",
    "\n",
    "A [Secret](https://kubernetes.io/docs/concepts/configuration/secret/) is an object that contains a small amount of sensitive data such as a password, a token, or a key. In this notebook, we would learn how to create a Secret and how to use Secrets as files from a Pod as seen  in https://kubernetes.io/docs/concepts/configuration/secret/#using-secrets"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "from kubernetes import client, config"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Load config from default location"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "config.load_kube_config()\n",
    "client.configuration.assert_hostname = False"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create API endpoint instance and API resource instances"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance = client.CoreV1Api()\n",
    "sec  = client.V1Secret()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Fill required Secret fields"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "sec.metadata = client.V1ObjectMeta(name=\"mysecret\")\n",
    "sec.type = \"Opaque\"\n",
    "sec.data = {\"username\": \"bXl1c2VybmFtZQ==\", \"password\": \"bXlwYXNzd29yZA==\"}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create Secret"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.create_namespaced_secret(namespace=\"default\", body=sec)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create test Pod API resource instances"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "pod = client.V1Pod()\n",
    "spec = client.V1PodSpec()\n",
    "pod.metadata = client.V1ObjectMeta(name=\"mypod\")\n",
    "container = client.V1Container()\n",
    "container.name = \"mypod\"\n",
    "container.image = \"redis\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Add volumeMount which would be used to hold secret"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "volume_mounts = [client.V1VolumeMount()]\n",
    "volume_mounts[0].mount_path = \"/data/redis\"\n",
    "volume_mounts[0].name = \"foo\"\n",
    "container.volume_mounts = volume_mounts"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create volume required by secret"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "spec.volumes = [client.V1Volume(name=\"foo\")]\n",
    "spec.volumes[0].secret = client.V1SecretVolumeSource(secret_name=\"mysecret\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "spec.containers = [container]\n",
    "pod.spec = spec"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create the Pod"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.create_namespaced_pod(namespace=\"default\",body=pod)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### View secret being used within the pod\n",
    "\n",
    "Wait for atleast 10 seconds to ensure pod is running before executing this section."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "user = api_instance.connect_get_namespaced_pod_exec(name=\"mypod\", namespace=\"default\", command=[ \"/bin/sh\", \"-c\", \"cat /data/redis/username\" ], stderr=True, stdin=False, stdout=True, tty=False)\n",
    "print(user)\n",
    "passwd = api_instance.connect_get_namespaced_pod_exec(name=\"mypod\", namespace=\"default\", command=[ \"/bin/sh\", \"-c\", \"cat /data/redis/password\" ], stderr=True, stdin=False, stdout=True, tty=False)\n",
    "print(passwd)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Delete Pod"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.delete_namespaced_pod(name=\"mypod\", namespace=\"default\", body=client.V1DeleteOptions())"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Delete Secret"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.delete_namespaced_secret(name=\"mysecret\", namespace=\"default\", body=sec)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": []
  }
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