Learning kubernetes
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The document provides a detailed step-by-step guide for setting up a Kubernetes cluster using Raspberry Pi devices, including configuring the base operating system, enabling add-ons like DNS and dashboard, and testing the setup. It outlines commands for installation, configuration, and troubleshooting, along with information about managing pods and services within the Kubernetes environment. Additionally, visualizer tools and remote access setups are discussed for monitoring the cluster's performance.
![#fromWorker/Minion
pirate@node2in~
$curl-khttps://kubernetes.default.svc.cluster.local
$curl-khttps://kubernetes
{
"paths":[
"/api",
"/api/v1",
"/apis",
"/apis/autoscaling",
"/apis/autoscaling/v1",
"/apis/batch",
"/apis/batch/v1",
"/apis/extensions",
"/apis/extensions/v1beta1",
"/healthz",
"/healthz/ping",
"/logs/",
"/metrics",
"/resetMetrics",
"/swagger-ui/",
"/swaggerapi/",
"/ui/",
"/version"
]
}
14 / 37
Test
DNS Service](https://image.slidesharecdn.com/learningkubernetes-160602223515/85/Learning-kubernetes-14-320.jpg)
Learning kubernetes
- 1. Orchestrating Containers Kubernetes - Learning Continues Eueung Mulyana http://eueung.github.io/docker-stuff/learning-k8s CodeLabs | Attribution-ShareAlike CC BY-SA 1 / 37
- 2. Outline Base Setup & OS Con g k8s Addons - DNS & Dashboard Remote Master & k8s Visualizer Test It All 2 / 37
- 3. Base Setup & OS Config 3 / 37
- 4. 4 / 37 node1 RPI 3 192.168.1.102 node2 RPI 2 192.168.1.101 node3 RPI 2 192.168.1.100
- 7. 7 / 37 kubernetes-on-arm v0.7.0 $dpkg-ikube-systemd.deb $kube-configinstall #rpiorrpi-2,hypriotos $gzip-dcimages.tar.gz|dockerload $kube-configinfo $kube-configenable-master $kube-configenable-worker192.168.1.102
- 8. k8s Addons DNS & Dashboard 8 / 37
- 9. $sudokube-configenable-addondashboard $sudokube-configenable-addondns namespace"kube-system"created Warning:Unitfileofnetworking.servicechangedondisk,'systemctldaemon-reload'reco replicationcontroller"kube-dns-v8"created service"kube-dns"created Startedaddon:dns $kubectlcluster-info Kubernetesmasterisrunningathttp://localhost:8080 KubeDNSisrunningathttp://localhost:8080/api/v1/proxy/namespaces/kube-system/services Dashboardisrunningathttp://localhost:8080/api/v1/proxy/namespaces/kube-system/servic $kubectl--namespace=kube-systemgetpods,rc,svc NAME READY STATUS RESTARTS AGE kube-dns-v8-uv6r5 4/4 Running 0 1h kubernetes-dashboard-h5g84 1/1 Running 0 1h NAME DESIRED CURRENT AGE kube-dns-v8 1 1 22h kubernetes-dashboard 1 1 22h NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE kube-dns 10.0.0.10 <none> 53/UDP,53/TCP 22h kubernetes-dashboard 10.0.0.249 <none> 80/TCP 22h 9 / 37 Master
- 11. $kubectl--namespace=kube-systemgetpo NAME READY STATUS RESTARTS AGE kube-dns-v8-8dk0a 4/4 Running 0 11s kubernetes-dashboard-ew4ec 1/1 Running 0 21s $kubectllogs--namespace=kube-systemkube-dns-v8-8dk0a-ckube2sky I053123:29:01.131613 1kube2sky.go:462Etcdserverfound:http://127.0.0.1:4001 I053123:29:02.225877 1kube2sky.go:529Usinghttps://10.0.0.1:443forkubernetes I053123:29:02.226027 1kube2sky.go:530UsingkubernetesAPI<nil> I053123:29:02.231187 1kube2sky.go:598Waitingforservice:default/kubernetes I053123:29:03.431233 1kube2sky.go:660SuccessfullyaddedDNSrecordforKubernet $kubectl--namespace=kube-systemexec-tikube-dns-v8-8dk0a--nslookupkubernetes.defa ... $kubectl--namespace=kube-systemexec-tikube-dns-v8-8dk0a--cat/etc/hosts $kubectl--namespace=kube-systemexec-tikube-dns-v8-8dk0a--cat/etc/resolv.conf 11 / 37 Check DNS Service
- 20. Remote Master & k8s Visualizer 20 / 37
- 21. $wgethttps://storage.googleapis.com/kubernetes-release/release/v1.2.0/bin/linux/amd64/kubectl $chmod+xkubectl&&sudomvkubectl/usr/local/bin/ $kubectlconfigset-clusterlk8--server=http://192.168.1.102:8080 $kubectlconfigset-contextlk8--cluster=lk8 $kubectlconfiguse-contextlk8 $kubectlgetnodes NAME STATUS AGE 192.168.1.100 Ready 3d 192.168.1.101 Ready 3d 192.168.1.102 Ready 3d 21 / 37 Remote Master
- 23. k8s Visualizer 23 / 37
- 24. Test It All 24 / 37
- 25. $kubectlrunhello-kube--image=hypriot/rpi-nano-httpd --port=80-lvisualize=true,run deployment"hello-kube"created $kubectlexposedeploymenthello-kube--type="LoadBalancer"--external-ip="192.168.1.10 service"hello-kube"exposed #anynodeeth0address:102,101,100 $kubectlgetsvc NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE hello-kube 10.0.0.157 ,192.168.1.102 80/TCP 37s kubernetes 10.0.0.1 <none> 443/TCP 3d $kubectlgetpo-owide NAME READY STATUS RESTARTS AGE NODE alpine-sleep 1/1 Running 0 1h 192.168.1.102 hello-kube-658934829-o6ka3 1/1 Running 0 2m 192.168.1.101 k8s-master-192.168.1.102 4/4 Running 3 2h 192.168.1.102 raspbian-sleep 1/1 Running 0 1h 192.168.1.102 25 / 37 Test #1
- 27. hello-kube Visualized 27 / 37
- 28. Test #2 via Dashboard 28 / 37
- 29. Test #2 via Dashboard 29 / 37
- 30. Test #2 - Take 2 30 / 37
- 31. Test #2 - Take 2 31 / 37
- 32. Test #2 - Visualizer 32 / 37
- 33. $kubectlgetpo-owide NAME READY STATUS RESTARTS AGE NODE alpine-sleep 1/1 Running 2 2h 192.168.1.102 k8s-master-192.168.1.102 4/4 Running 3 4h 192.168.1.102 my-nginx-afadx 1/1 Running 0 19m 192.168.1.100 my-nginx-e5coa 1/1 Running 0 19m 192.168.1.101 my-nginx2-68r7o 1/1 Running 0 6m 192.168.1.101 my-nginx2-pviak 1/1 Running 0 6m 192.168.1.100 raspbian-sleep 1/1 Running 2 2h 192.168.1.102 $kubectlgetsvc NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes 10.0.0.1 <none> 443/TCP 3d my-nginx2 10.0.0.138 8300/TCP 6m $curlmy-nginx2:8300 <p>WELCOMETONGINX</p> HypriotOS/armv7:pirate@node1in~ 33 / 37 Test #2 Reachability
- 34. 34 / 37
- 35. Refs 35 / 37
- 36. Refs 1. Docker Pirates ARMed with explosive stu 2. kubernetes-on-arm - by @luxas 3. k8s-visualizer @brendandburns @saturnism 4. Setting up Kubernetes visualization of a cluster - @rpicloud 36 / 37
- 37. END Eueung Mulyana http://eueung.github.io/docker-stuff/learning-k8s CodeLabs | Attribution-ShareAlike CC BY-SA 37 / 37