{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "Managing kubernetes objects using common resource operations with the python client\n",
    "-----------------------------------------------------------------------------------------------\n",
    "\n",
    "Some of these operations include;\n",
    "\n",
    "- **`create_xxxx`** : create a resource object. Ex **`create_namespaced_pod`** and **`create_namespaced_deployment`**, for creation of pods and deployments respectively. This performs operations similar to **`kubectl create`**.\n",
    "\n",
    "\n",
    "- **`read_xxxx`** : read the specified resource object. Ex **`read_namespaced_pod`** and **`read_namespaced_deployment`**, to read pods and deployments respectively. This performs operations similar to **`kubectl describe`**.\n",
    "\n",
    "\n",
    "- **`list_xxxx`** : retrieve all resource objects of a specific type. Ex **`list_namespaced_pod`** and **`list_namespaced_deployment`**, to list pods and deployments respectively. This performs operations similar to **`kubectl get`**.\n",
    "\n",
    "\n",
    "- **`patch_xxxx`** : apply a change to a specific field. Ex **`patch_namespaced_pod`** and **`patch_namespaced_deployment`**, to update pods and deployments respectively. This performs operations similar to **`kubectl patch`**, **`kubectl label`**, **`kubectl annotate`** etc.\n",
    "\n",
    "\n",
    "- **`replace_xxxx`** : replacing a resource object will update the resource by replacing the existing spec with the provided one. Ex **`replace_namespaced_pod`** and **`replace_namespaced_deployment`**, to update pods and deployments respectively, by creating new replacements of the entire object. This performs operations similar to **`kubectl rolling-update`**, **`kubectl apply`** and **`kubectl replace`**.\n",
    "\n",
    "\n",
    "- **`delete_xxxx`** : delete a resource. This performs operations similar to **`kubectl delete`**.\n",
    "\n",
    "\n",
    "For Further information see the Documentation for API Endpoints section in https://github.com/kubernetes-client/python/blob/master/kubernetes/README.md"
   ]
  },
  {
   "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()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create API endpoint instance as well as API resource instances (body and specification)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance = client.AppsV1Api()\n",
    "dep = client.V1Deployment()\n",
    "spec = client.V1DeploymentSpec()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Fill required object fields (apiVersion, kind, metadata and spec)."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "name = \"my-busybox\"\n",
    "dep.metadata = client.V1ObjectMeta(name=name)\n",
    "\n",
    "spec.template = client.V1PodTemplateSpec()\n",
    "spec.template.metadata =  client.V1ObjectMeta(name=\"busybox\")\n",
    "spec.template.metadata.labels = {\"app\":\"busybox\"}\n",
    "spec.template.spec = client.V1PodSpec()\n",
    "dep.spec = spec\n",
    "\n",
    "container = client.V1Container()\n",
    "container.image = \"busybox:1.26.1\"\n",
    "container.args = [\"sleep\", \"3600\"]\n",
    "container.name = name\n",
    "spec.template.spec.containers = [container]"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Create Deployment using create_xxxx command for Deployments."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.create_namespaced_deployment(namespace=\"default\",body=dep)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Use list_xxxx command for Deployment, to list Deployments."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "deps = api_instance.list_namespaced_deployment(namespace=\"default\")\n",
    "for item in deps.items:\n",
    "    print(\"%s  %s\" % (item.metadata.namespace, item.metadata.name))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Use read_xxxx command for Deployment, to display the detailed state of the created Deployment resource."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "api_instance.read_namespaced_deployment(namespace=\"default\",name=name)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Use patch_xxxx command for Deployment, to make specific update to the Deployment."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "dep.metadata.labels = {\"key\": \"value\"}\n",
    "api_instance.patch_namespaced_deployment(name=name, namespace=\"default\", body=dep)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Use replace_xxxx command for Deployment, to update Deployment with a completely new version of the object."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true
   },
   "outputs": [],
   "source": [
    "dep.spec.template.spec.containers[0].image = \"busybox:1.26.2\"\n",
    "api_instance.replace_namespaced_deployment(name=name, namespace=\"default\", body=dep)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "deletable": true,
    "editable": true
   },
   "source": [
    "### Use delete_xxxx command for Deployment, to delete created Deployment."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "deletable": true,
    "editable": true,
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "api_instance.delete_namespaced_deployment(name=name, 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": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 2",
   "language": "python",
   "name": "python2"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 2
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython2",
   "version": "2.7.13"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}