Minikubeのインストール #centos7

CPUの仮想化技術が有効になっているかチェック

$ egrep --color 'vmx|svm' /proc/cpuinfo

必要なパッケージをインストール

$ sudo yum install libvirt libvirt-daemon-kvm qemu-kvm libvirt-client socat

KVMのインストール

$ sudo systemctl enable libvirtd
$ sudo systemctl start libvirtd
$ sudo systemctl status libvirtd
$ sudo virsh net-list | grep default
$ sudo usermod -a -G libvirt $(whoami)
$ newgrp libvirt

Minikubeのインストール

$ curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
$ sudo install minikube /usr/local/bin

デフォルト値の設定

$ minikube config set vm-driver kvm2
$ minikube config set memory 4096
$ minikube config set disk-size 20GB

起動

$ minikube start --kubernetes-version v1.14.8
$ minikube status

kubectlのインストール

$ sudo tee /etc/yum.repos.d/kubernetes.repo <<EOF
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
$ sudo yum install kubectl-1.14.8
$ kubectl get pods -A

Ingressのインストール

$ minikube addons enable ingress
$ kubectl get pods -n kube-system | grep ingress

NFSのインストール

$ sudo yum install nfs-utils
$ sudo systemctl enable nfs-server
$ sudo systemctl start nfs-server
$ sudo systemctl status nfs-server

Minikube用の共有ディレクトリの設定

$ sudo mkdir -p /data/minikube
$ sudo chown $(whoami):$(whoami) /data/minikube
$ sudo tee /etc/exports.d/minikube.exports <<EOF
/data/minikube $(minikube ip | cut -d . -f 1-3).0/24(rw,no_root_squash)
EOF
$ sudo exportfs -a
$ showmount -e

MinikubeからNFSへのアクセスを許可

$ sudo firewall-cmd --permanent --new-zone=minikube
$ sudo firewall-cmd --permanent --zone=minikube --set-target=ACCEPT
$ sudo firewall-cmd --permanent --zone=minikube --add-source=$(minikube ip | cut -d . -f 1-3).0/24
$ sudo firewall-cmd --add-service=nfs --zone=minikube --permanent
$ sudo firewall-cmd --reload
$ sudo firewall-cmd --list-all --zone=minikube

PV・PVCの作成

$ tee /tmp/nfs-minikube.yml <<EOF
apiVersion: v1
kind: PersistentVolume
metadata:
  name: nfs-minikube
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteMany
  persistentVolumeReclaimPolicy: Recycle
  storageClassName: slow
  mountOptions:
    - hard
  nfs:
    server: $(minikube ip | cut -d . -f 1-3).1
    path: "/data/minikube"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: nfs-minikube
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1Gi
  storageClassName: slow
EOF
$ kubectl apply -f /tmp/nfs-minikube.yml
$ kubectl get pv nfs-minikube
$ kubectl get pvc nfs-minikube

Nginxをデプロイ

$ tee /tmp/nginx.yml <<EOF
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx
spec:
  replicas: 2
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        volumeMounts:
        - mountPath: "/usr/share/nginx/html"
          name: html
      volumes:
        - name: html
          persistentVolumeClaim:
            claimName: nfs-minikube
---
apiVersion: v1
kind: Service
metadata:
  name: nginx
spec:
  type: NodePort
  selector:
    app: nginx
  ports:
    - port: 80
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
spec:
  backend:
    serviceName: nginx
    servicePort: 80
EOF
$ kubectl apply -f /tmp/nginx.yml

動作確認

ページを用意

$ tee /data/minikube/index.html <<EOF
<html>
<head>
<meta charset="utf-8"/>
</head>
<body>
<div>ようこそ $(whoami) さん</div>
</body>
</html>
EOF

ダッシュボードを開く

$ minikube dashboard &

Ingress のエンドポイントをクリックして別タブに表示されるページを確認

停止

$ minikube stop
$ minikube status

（または）削除

$ minikube delete
$ minikube status