278 lines
5.6 KiB
Plaintext
278 lines
5.6 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"How to start a Pod\n",
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"==================\n",
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"\n",
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"In this notebook, we show you how to create a single container Pod.\n",
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"\n",
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"Start by importing the Kubernetes module\n",
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"-----------------------------------------"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"from kubernetes import client, config"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"If you are using a proxy, you can use the _client Configuration_ to setup the host that the client should use. Otherwise read the kubeconfig file."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"config.load_incluster_config()"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"Pods are a stable resource in the V1 API group. Instantiate a client for that API group endpoint."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"v1=client.CoreV1Api()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true,
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"scrolled": false
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},
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"outputs": [],
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"source": [
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"pod=client.V1Pod()\n",
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"spec=client.V1PodSpec()\n",
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"pod.metadata=client.V1ObjectMeta(name=\"busybox\")\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"In this example, we only start one container in the Pod. The container is an instance of the _V1Container_ class. "
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"container=client.V1Container()\n",
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"container.image=\"busybox\"\n",
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"container.args=[\"sleep\", \"3600\"]\n",
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"container.name=\"busybox\""
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"The specification of the Pod is made of a single container in its list."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"spec.containers = [container]\n",
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"pod.spec = spec"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"Get existing list of Pods, before the creation of the new Pod."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"ret = v1.list_namespaced_pod(namespace=\"default\")\n",
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"for i in ret.items:\n",
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" print(\"%s %s %s\" % (i.status.pod_ip, i.metadata.namespace, i.metadata.name))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"You are now ready to create the Pod."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"v1.create_namespaced_pod(namespace=\"default\",body=pod)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"Get list of Pods, after the creation of the new Pod. Note the newly created pod with name \"busybox\""
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": [
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"ret = v1.list_namespaced_pod(namespace=\"default\")\n",
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"for i in ret.items:\n",
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" print(\"%s %s %s\" % (i.status.pod_ip, i.metadata.namespace, i.metadata.name))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"Delete the Pod\n",
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"--------------\n",
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"\n",
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"You refer to the Pod by name, you need to add its namespace and pass some _delete_ options."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": false,
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"deletable": true,
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"editable": true,
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"scrolled": false
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},
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"outputs": [],
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"source": [
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"v1.delete_namespaced_pod(name=\"busybox\", namespace=\"default\", body=client.V1DeleteOptions())"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {
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"collapsed": true,
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"deletable": true,
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"editable": true
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},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 2",
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"language": "python",
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"name": "python2"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 2
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython2",
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"version": "2.7.13"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 1
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}
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