k8s-workshop-nctu's Introduction

Kubernetes Workshop on CNTUG

The purpose of this workshop series is to get you on-boarded to Kuberentes experience. We will guide you to setup a cluster using kubeadm, and through tools(kubectl、helm or kustomize) to deploy applications.

Slide

Requirements

Minikube
- Linux
- Mac OS X
- Windows
- iso

Please download the minikube above URL.

Setup Cluster

First, Use minikube create the master node as following command:

$ minikube --profile k8s-m1 start

And then check the status via kubectl:

$ kubectl get no
NAME      STATUS    ROLES     AGE       VERSION
k8s-m1    Ready     master    2m        v1.11.0

$ kubectl -n kube-system get po -o wide
NAME                             READY     STATUS    RESTARTS   AGE       IP               NODE
coredns-78fcdf6894-cgwlj         1/1       Running   0          53s       10.244.0.3       k8s-m1
coredns-78fcdf6894-rwvt7         1/1       Running   0          53s       10.244.0.2       k8s-m1
etcd-k8s-m1                      1/1       Running   0          21s       192.168.99.100   k8s-m1
kube-addon-manager-k8s-m1        1/1       Running   0          23s       192.168.99.100   k8s-m1
kube-apiserver-k8s-m1            1/1       Running   0          7s        192.168.99.100   k8s-m1
kube-controller-manager-k8s-m1   1/1       Running   0          12s       192.168.99.100   k8s-m1
kube-flannel-ds-ftrv7            1/1       Running   0          51s       192.168.99.100   k8s-m1
kube-proxy-hxgfg                 1/1       Running   0          53s       192.168.99.100   k8s-m1
storage-provisioner              1/1       Running   0          51s       192.168.99.100   k8s-m1

Now, we will add new virtual machines as a Kubernetes node:

$ minikube --profile k8s-n1 start --node

# Get bootstrap token from master node
$ minikube --profile k8s-m1 ssh "sudo kubeadm token list"

# Use ssh go in virtual machine
$ minikube --profile k8s-n1 ssh 

# k8s-n1 vm
$ sudo su -
$ TOKEN=7rzqkm.1goumlnntalpxvw0
$ kubeadm join --token ${TOKEN} ${MASTER_IP}:8443 \
    --discovery-token-unsafe-skip-ca-verification \
    --ignore-preflight-errors=Swap \
    --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests

Finally, check the status via kubectl:

$ kubectl get no
NAME      STATUS    ROLES     AGE       VERSION
k8s-m1    Ready     master    6m        v1.11.0
k8s-n1    Ready     <none>    40s       v1.11.0

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