gcloud-nslookup.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "All components are up to date.\n",
      "yes: standard output: Broken pipe\n",
      "\n",
      "All components are up to date.\n",
      "yes: standard output: Broken pipe\n",
      "\n",
      "All components are up to date.\n",
      "yes: standard output: Broken pipe\n"
     ]
    }
   ],
   "source": [
    "yes | gcloud components update\n",
    "yes | gcloud components install kubectl\n",
    "yes | gcloud components install beta"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "PROJECT_ID              NAME             PROJECT_NUMBER\n",
      "nvlpr-research          nvlpr            635569233476\n",
      "research-191823         Research         907859198744\n",
      "researchdesktop-192421  ResearchDesktop  706938655672\n"
     ]
    }
   ],
   "source": [
    "gcloud projects list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "set -e\n",
    "[email protected]\n",
    "project=research-191823\n",
    "zone=us-central1-b\n",
    "cluster=testcluster\n",
    "image=gcr.io/$project/testimage"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The following clusters will be deleted.\n",
      " - [testcluster] in [us-central1-a]\n",
      "\n",
      "Do you want to continue (Y/n)?  \n",
      "\u001b[1;31mERROR:\u001b[0m (gcloud.container.clusters.delete) Some requests did not succeed:\n",
      " - args: [u\"ResponseError: code=404, message=Not found: projects/research-191823/zones/us-central1-a/clusters/testcluster.\\nNo cluster named 'testcluster' in research-191823.\"]\n",
      "   exit_code: 1\n",
      "   message: ResponseError: code=404, message=Not found: projects/research-191823/zones/us-central1-a/clusters/testcluster.\n",
      "No cluster named 'testcluster' in research-191823.\n",
      "\n",
      "yes: standard output: Broken pipe\n"
     ]
    }
   ],
   "source": [
    "yes | gcloud container clusters delete $cluster || true"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Updated property [core/project].\n",
      "Updated property [compute/zone].\n",
      "\u001b[1;33mWARNING:\u001b[0m Starting in 1.12, new clusters will have basic authentication disabled by default. Basic authentication can be enabled (or disabled) manually using the `--[no-]enable-basic-auth` flag.\n",
      "\u001b[1;33mWARNING:\u001b[0m Starting in 1.12, new clusters will not have a client certificate issued. You can manually enable (or disable) the issuance of the client certificate using the `--[no-]issue-client-certificate` flag.\n",
      "\u001b[1;33mWARNING:\u001b[0m Currently VPC-native is not the default mode during cluster creation. In the future, this will become the default mode and can be disabled using `--no-enable-ip-alias` flag. Use `--[no-]enable-ip-alias` flag to suppress this warning.\n",
      "\u001b[1;33mWARNING:\u001b[0m Starting in 1.12, default node pools in new clusters will have their legacy Compute Engine instance metadata endpoints disabled by default. To create a cluster with legacy instance metadata endpoints disabled in the default node pool, run `clusters create` with the flag `--metadata disable-legacy-endpoints=true`.\n",
      "This will enable the autorepair feature for nodes. Please see https://cloud.google.com/kubernetes-engine/docs/node-auto-repair for more information on node autorepairs.\n",
      "Creating cluster testcluster in us-central1-b...done.                          \n",
      "Created [https://container.googleapis.com/v1/projects/research-191823/zones/us-central1-b/clusters/testcluster].\n",
      "To inspect the contents of your cluster, go to: https://console.cloud.google.com/kubernetes/workload_/gcloud/us-central1-b/testcluster?project=research-191823\n",
      "kubeconfig entry generated for testcluster.\n",
      "NAME         LOCATION       MASTER_VERSION  MASTER_IP       MACHINE_TYPE   NODE_VERSION  NUM_NODES  STATUS\n",
      "testcluster  us-central1-b  1.9.7-gke.11    35.184.158.196  n1-standard-1  1.9.7-gke.11  4          RUNNING\n"
     ]
    }
   ],
   "source": [
    "gcloud config set project $project\n",
    "gcloud config set compute/zone us-central1-b\n",
    "\n",
    "gcloud container clusters create $cluster --num-nodes=4"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "NAME                                        ZONE           MACHINE_TYPE   PREEMPTIBLE  INTERNAL_IP  EXTERNAL_IP     STATUS\n",
      "gke-amlp-default-pool-0bb18c21-43wc         us-central1-a  n1-standard-8               10.128.0.5   35.224.7.173    RUNNING\n",
      "gke-amlp-default-pool-0bb18c21-jvtw         us-central1-a  n1-standard-8               10.128.0.3   35.188.61.217   RUNNING\n",
      "gke-amlp-default-pool-0bb18c21-zcg8         us-central1-a  n1-standard-8               10.128.0.2   35.202.117.64   RUNNING\n",
      "gke-amlp-default-pool-0bb18c21-zgm7         us-central1-a  n1-standard-8               10.128.0.4   104.197.68.99   RUNNING\n",
      "gke-testcluster-default-pool-fa22edca-32jp  us-central1-b  n1-standard-1               10.128.0.6   35.202.7.174    RUNNING\n",
      "gke-testcluster-default-pool-fa22edca-6zzk  us-central1-b  n1-standard-1               10.128.0.7   35.239.235.169  RUNNING\n",
      "gke-testcluster-default-pool-fa22edca-t83t  us-central1-b  n1-standard-1               10.128.0.9   35.184.192.46   RUNNING\n",
      "gke-testcluster-default-pool-fa22edca-w0w4  us-central1-b  n1-standard-1               10.128.0.8   35.226.156.117  RUNNING\n"
     ]
    }
   ],
   "source": [
    "gcloud compute instances list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "pod \"busybox\" created\n"
     ]
    }
   ],
   "source": [
    "kubectl create -f - <<EOF\n",
    "---\n",
    "apiVersion: v1\n",
    "kind: Pod\n",
    "metadata:\n",
    "  name: busybox\n",
    "  labels:\n",
    "    app: busybox\n",
    "spec:\n",
    "  containers:\n",
    "  - name: busybox\n",
    "    image: busybox\n",
    "    command: [\"sleep\"]\n",
    "    args: [\"1000000\"]\n",
    "  restartPolicy: Always\n",
    "  hostname: \"busybox\"\n",
    "EOF"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "pod \"busybox2\" created\n"
     ]
    }
   ],
   "source": [
    "kubectl create -f - <<EOF\n",
    "---\n",
    "apiVersion: v1\n",
    "kind: Pod\n",
    "metadata:\n",
    "  name: busybox2\n",
    "  labels:\n",
    "    app: busybox2\n",
    "spec:\n",
    "  containers:\n",
    "  - name: busybox2\n",
    "    image: busybox\n",
    "    command: [\"sleep\"]\n",
    "    args: [\"1000000\"]\n",
    "  restartPolicy: Always\n",
    "  hostname: \"busybox2\"\n",
    "EOF"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "service \"busybox2\" created\n"
     ]
    }
   ],
   "source": [
    "kubectl create -f - <<EOF\n",
    "---\n",
    "kind: Service\n",
    "apiVersion: v1\n",
    "metadata:\n",
    "  name: busybox2\n",
    "spec:\n",
    "  selector:\n",
    "    app: busybox2\n",
    "  ports:\n",
    "  - protocol: TCP\n",
    "    port: 80\n",
    "    targetPort: 80\n",
    "EOF"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "NAME       READY     STATUS    RESTARTS   AGE\n",
      "busybox    1/1       Running   0          1m\n",
      "busybox2   1/1       Running   0          1m\n",
      "NAME         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)   AGE\n",
      "busybox2     ClusterIP   10.39.253.31   <none>        80/TCP    12s\n",
      "kubernetes   ClusterIP   10.39.240.1    <none>        443/TCP   2m\n"
     ]
    }
   ],
   "source": [
    "kubectl get pods\n",
    "kubectl get services"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Server:\t\t10.39.240.10\n",
      "Address:\t10.39.240.10:53\n",
      "\n",
      "** server can't find busybox2: NXDOMAIN\n",
      "\n",
      "*** Can't find busybox2: No answer\n",
      "\n"
     ]
    }
   ],
   "source": [
    "kubectl exec busybox -- nslookup busybox2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Server:\t\t10.39.240.10\n",
      "Address:\t10.39.240.10:53\n",
      "\n",
      "** server can't find kubernetes.default: NXDOMAIN\n",
      "\n",
      "*** Can't find kubernetes.default: No answer\n",
      "\n"
     ]
    }
   ],
   "source": [
    "kubectl exec busybox -- nslookup kubernetes.default"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Server:\t\t10.39.240.10\n",
      "Address:\t10.39.240.10:53\n",
      "\n",
      "** server can't find kubernetes: NXDOMAIN\n",
      "\n",
      "*** Can't find kubernetes: No answer\n",
      "\n"
     ]
    }
   ],
   "source": [
    "kubectl exec busybox -- nslookup kubernetes"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "nameserver 10.39.240.10\n",
      "search default.svc.cluster.local svc.cluster.local cluster.local c.research-191823.internal google.internal\n",
      "options ndots:5\n"
     ]
    }
   ],
   "source": [
    "kubectl exec busybox -- cat /etc/resolv.conf"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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