[ 6 ] - EKS Storage : Snapshot Controller

1. EBS Volume Snapshot Controller

 ➜  PV로 사용하고 있는 중요한 EBS를 EKS에서 바로 Snapshot으로 백업할 수 있는 서비스

 

 ➜  설치

    ✅  CRD 설치

curl -s -O https://raw.githubusercontent.com/kubernetes-csi/external-snapshotter/master/client/config/crd/snapshot.storage.k8s.io_volumesnapshots.yaml
curl -s -O https://raw.githubusercontent.com/kubernetes-csi/external-snapshotter/master/client/config/crd/snapshot.storage.k8s.io_volumesnapshotclasses.yaml
curl -s -O https://raw.githubusercontent.com/kubernetes-csi/external-snapshotter/master/client/config/crd/snapshot.storage.k8s.io_volumesnapshotcontents.yaml

 

 

    ✅  CRD 리소스 확인

kubectl get crd | grep snapshot
kubectl api-resources  | grep snapshot

 

 

    ✅  Snapshot Controller 설치

curl -s -O https://raw.githubusercontent.com/kubernetes-csi/external-snapshotter/master/deploy/kubernetes/snapshot-controller/rbac-snapshot-controller.yaml
curl -s -O https://raw.githubusercontent.com/kubernetes-csi/external-snapshotter/master/deploy/kubernetes/snapshot-controller/setup-snapshot-controller.yaml
kubectl apply -f rbac-snapshot-controller.yaml,setup-snapshot-controller.yaml

 

 

 ➜  Test Pod 배포

    ✅  curl -s -O https://raw.githubusercontent.com/kubernetes-sigs/aws-ebs-csi-driver/master/examples/kubernetes/snapshot/manifests/classes/snapshotclass.yaml

    ✅  kubectl apply -f snapshotclass.yaml

 

    ✅  kubectl get pv,pvc

 

 

    ✅   kubectl exec ebs-dp-app -- tail -f /data/out.txt

 

 

    ✅  nano ebs_vol_snapshot.yaml

apiVersion: snapshot.storage.k8s.io/v1
kind: VolumeSnapshot
metadata:
  name: ebs-volume-snapshot
spec:
  volumeSnapshotClassName: csi-aws-vsc
  source:
    persistentVolumeClaimName: ebs-dp-claim

 

 

    ✅  kubectl apply -f ebs_vol_snapshot.yaml

    ✅  kubectl get volumesnapshot

 

    ✅  AWS volume 생성된 것 확인

 

 

 

 ➜  파드와 PVC 강제 삭제 => 지금까지 설정한 reclaim policy는 delete 이므로 PVC삭제되면 PV도 삭제됨 

    ✅  kubectl delete pod ebs-dp-app

    ✅  kubectl delete pvc ebs-dp-claim

 

 ➜  ebs 볼륨 스냅샷 복원

    ✅  스냅샷 복원 용도의 PVC와 파드 생성

    ✅   ebs_snapshot_restore_pvc.yaml 파일 생성

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
    name: ebs-snapshot-restored-claim
spec:
  accessModes:
  - ReadWriteOnce
  storageClassName: ebs-dp-sc
  resources:
    requests:
      storage: 4Gi
  dataSource:
    kind: VolumeSnapshot
    name: ebs-volume-snapshot
    apiGroup: snapshot.storage.k8s.io

 

    ✅  kubectl apply -f ebs_snapshot_restore_pvc.yaml

 

    ✅  nano ebs_snapshot_restore_pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: ebs-dp-app
spec:
  containers:
  - name: app
    image: centos
    command: ["/bin/sh"]
    args: ["-c", "while true; do echo $(date -u) >> /data/out.txt; sleep 10; done"]
    volumeMounts:
    - name: persistent-storage
      mountPath: /data
  volumes:
  - name: persistent-storage
    persistentVolumeClaim:  
      claimName: ebs-snapshot-restored-claim

 

 

    ✅  kubectl apply -f ebs_snapshot_restore_pod.yaml

    ✅  kubectl get pv,pvc,sc

 

 

    ✅  kubectl exec ebs-dp-app --head /data/out.txt

    ✅  kubectl exec ebs-dp-app -- tail -f /data/out.txt

 

    ✅  참고

https://kubernetes.io/docs/concepts/storage/volume-pvc-datasource/

CSI Volume Cloning