Kubernetes NFS를 이용한 동적프로비저닝

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Kubernetes설치

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NFS 설치 및 설정

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동적 프로비저닝

sudo systemctl restart nfs-fernel-server
sudo mkdir /nfsvolume
sudo cd /nfsvolume
rm /nfsvolume/* 				#안에 파일이 있다면 다 지워줌

NFS Dynamic Provisioner 구성

https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner

git clone https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner.git

cd nfs-subdir-external-provisioner/deploy

kubectl create -f rbac.yaml

vi deployment.yaml

...
          env:
            - name: PROVISIONER_NAME
              value: k8s-sigs.io/nfs-subdir-external-provisioner
            - name: NFS_SERVER
              value: 192.168.100.100
            - name: NFS_PATH
              value: /nfsvolume
      volumes:
        - name: nfs-client-root
          nfs:
            server: 192.168.100.100
            path: /nfsvolume

kubectl create -f deployment.yaml

kubectl create -f class.yaml

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vi mypvc-dynamic.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mypvc-dynamic
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1G
  storageClassName: 'nfs-client'

kubectl create -f mypvc-dynamic.yaml

이렇게 pvc만 만들어도 pvclass에 의해서 자동으로 만들어지는 것을 볼 수 있다.

echo "<h1> Hello NFS Dynamic Provision </h1>" | sudo tee /nfsvolume/XXX/index.html

vi myweb-rs-dynamic.yaml

apiVersion: apps/v1
kind: ReplicaSet
metadata:
  name: myweb-rs
spec:
  replicas: 3
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
        - name: myweb
          image: httpd
          volumeMounts:
            - name: myvol
              mountPath: /usr/local/apache2/htdocs
      volumes:
        - name: myvol
          persistentVolumeClaim:
            claimName: mypvc-dynamic

kubectl create -f myweb-rs-dynamic.yaml

kubectl delete -f .			#서비스 삭제
kubectl get pv,pvc
### pvc를 지우면 pv가 같이 지워지는 것을 확인할 수 있다.

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기본 스토리지 클래스

vi ~/nfs-subdir-external-provisioner/deploy/class.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-client
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner # or choose another name, must match deployment's env PROVISIONER_NAME'
parameters:
  archiveOnDelete: "false"

kubectl apply -f class.yaml

kubectl get sc

NAME                   ...
nfs-client (default)   ...

### 이름 뒤에 default가 붙는 것을 default 스토리지 클래스라고 한다.

vi mypvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mypvc-dynamic
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 1G

kubectl create -f mypvc.yaml