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    "How to create a Deployment\n",
    "==========================\n",
    "\n",
    "In this notebook, we show you how to create a Deployment with 3 ReplicaSets. These ReplicaSets are owned by the Deployment and are managed by the Deployment controller. We would also learn how to carry out RollingUpdate and RollBack to new and older versions of the deployment."
   ]
  },
  {
   "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,
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   },
   "outputs": [],
   "source": [
    "config.load_kube_config()\n",
    "extension = client.ExtensionsV1beta1Api()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create Deployment object"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "deployment = client.ExtensionsV1beta1Deployment()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Fill required Deployment fields (apiVersion, kind, and metadata)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
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   "outputs": [],
   "source": [
    "deployment.api_version = \"extensions/v1beta1\"\n",
    "deployment.kind = \"Deployment\"\n",
    "deployment.metadata = client.V1ObjectMeta(name=\"nginx-deployment\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### A Deployment also needs a .spec section"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "spec = client.ExtensionsV1beta1DeploymentSpec()\n",
    "spec.replicas = 3"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Add Pod template in .spec.template section"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "spec.template = client.V1PodTemplateSpec()\n",
    "spec.template.metadata = client.V1ObjectMeta(labels={\"app\": \"nginx\"})\n",
    "spec.template.spec = client.V1PodSpec()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Pod template container description"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "container = client.V1Container()\n",
    "container.name=\"nginx\"\n",
    "container.image=\"nginx:1.7.9\"\n",
    "container. ports = [client.V1ContainerPort(container_port=80)]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "spec.template.spec.containers = [container]\n",
    "deployment.spec = spec"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create Deployment"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "extension.create_namespaced_deployment(namespace=\"default\", body=deployment)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Update container image "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "deployment.spec.template.spec.containers[0].image = \"nginx:1.9.1\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Apply update (RollingUpdate)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "extension.replace_namespaced_deployment(name=\"nginx-deployment\", namespace=\"default\", body=deployment)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create DeploymentRollback object\n",
    "This object is used to rollback to a previous version of the deployment."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "rollback = client.ExtensionsV1beta1DeploymentRollback()\n",
    "rollback.api_version = \"extensions/v1beta1\"\n",
    "rollback.kind = \"DeploymentRollback\"\n",
    "rollback.rollback_to = client.ExtensionsV1beta1RollbackConfig()\n",
    "rollback.rollback_to.revision = 0\n",
    "rollback.name = \"nginx-deployment\""
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Execute RollBack"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "extension.create_namespaced_deployment_rollback_rollback(name=\"nginx-deployment\", namespace=\"default\", body=rollback)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Delete Deployment"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "extension.delete_namespaced_deployment(name=\"nginx-deployment\", namespace=\"default\", body=client.V1DeleteOptions(propagation_policy=\"Foreground\", grace_period_seconds=5))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": []
  }
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