Storage Architecture

FileStorage(NFS), BlockStorage(Longhorn)
강의자료 PDF
Storage Architecture with FileStorage, BlockStorage, ObjectStorage for Kubernetes.


1. FTP Server 구축

1-1) NFS 패키지 다운 및 설치

설치

yum -y install nfs-utils rpcbind
systemctl start rpcbind
systemctl start nfs-server
systemctl start rpc-statd
systemctl enable rpcbind
systemctl enable nfs-server

확인

systemctl status nfs-server

1-2) 공유 폴더 생성 및 설정

공유 폴더 생성

mkdir /share-data
chmod 777 /share-data

vi /etc/exports 로 아래 내용 입력 후 저장

/share-data *(rw,sync,no_root_squash)

반영

exportfs -r

방화벽 해제 및 NFS Server재시작

systemctl stop firewalld && systemctl disable firewalld
systemctl stop NetworkManager && systemctl disable NetworkManager
systemctl restart nfs-server

node1 및 node2에 NFS 클라이언트 설치

sudo yum install nfs-utils


2. FileStroage (NFS) 연결 Pod

NFS with FileStorage for Kubernetes.

2-1) NFS 연결을 위한 PersistentVolume 생성

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-nfs
  labels:
    pv: pv-nfs
spec:
  capacity:
    storage: 2G
  accessModes:
  - ReadWriteMany
  nfs:
    path: /share-data
    server: 192.168.219.10

2-2) PersistentVolumeClaim

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pvc-nfs
spec:
  accessModes:
  - ReadWriteMany
  resources:
    requests:
      storage: 2G
  storageClassName: ""
  selector:
    matchLabels:
      pv: pv-nfs

2-3) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-nfs
spec:
  containers:
  - name: container
    image: kubetm/init
    volumeMounts:
    - name: volume-nfs
      mountPath: /nfs/share-data
  volumes:
  - name : volume-nfs
    persistentVolumeClaim:
      claimName: pvc-nfs


3. Longhorn 구축

3-1) 모든 Master/Work Node에 iscsi 설치

yum install -y iscsi-initiator-utils

3-2) Longhorn 설치

kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/master/deploy/longhorn.yaml

3-3) 확인

kubectl get pods -n longhorn-system

3-4) 기존 Longhorn StorageClass 삭제 및 재생성

kubectl get storageclasses.storage.k8s.io -n longhorn-system longhorn
kubectl delete storageclasses.storage.k8s.io -n longhorn-system longhorn

cat <<EOF | kubectl create -f -
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: longhorn
provisioner: driver.longhorn.io
allowVolumeExpansion: true
parameters:
  numberOfReplicas: "2"
  staleReplicaTimeout: "2880"
  fromBackup: ""
EOF

3-5) Longhorn Dashboard 접속을 위한 Port Type변경

Service Type 변경 [ClusterIP -> NodePort]

kubectl edit svc -n longhorn-system longhorn-frontend


4. Longhorn Volume에 POD 연결

Longhorn with BlockStorage for Kubernetes.

4-1) PersistentVolumeClaim

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: longhorn-pvc
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: longhorn
  resources:
    requests:
      storage: 1Gi

4-2) Longhorn Dashboard 접속

http://localhost:30001

4-3) Pod

apiVersion: v1
kind: Pod
metadata:
  name: pod-blockstorage
spec:
  containers:
  - name: container
    image: kubetm/init
    volumeMounts:
    - name: volume-blockstorage
      mountPath: /longhorn/data
  volumes:
  - name : volume-blockstorage
    persistentVolumeClaim:
      claimName: longhorn-pvc

4-4) Longhorn Volumeattachments 확인

kubectl get -n longhorn-system volumeattachments.storage.k8s.io

Referenece

Kubernetes

Others