MicroK8s : Storage を有効にする2020/08/12 |
MicroK8s ビルトイン の Storage を有効にする場合は以下のように設定します。
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[1] | プライマリーノードで、ビルトイン Storage を有効にします。 |
[root@dlp ~]# export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/lib64" [root@dlp ~]# microk8s enable storage Enabling default storage class deployment.apps/hostpath-provisioner created storageclass.storage.k8s.io/microk8s-hostpath created serviceaccount/microk8s-hostpath created clusterrole.rbac.authorization.k8s.io/microk8s-hostpath created clusterrolebinding.rbac.authorization.k8s.io/microk8s-hostpath created Storage will be available soon # [hostpath-provisioner] pod が起動する [root@dlp ~]# microk8s kubectl -n kube-system get pods NAME READY STATUS RESTARTS AGE coredns-588fd544bf-4d4kc 1/1 Running 0 23m dashboard-metrics-scraper-59f5574d4-lmgmt 1/1 Running 0 23m hostpath-provisioner-75fdc8fccd-fnsrv 1/1 Running 0 2m50s kubernetes-dashboard-6d97855997-bwg2g 1/1 Running 0 23m metrics-server-c65c9d66-kdxh8 1/1 Running 2 16h |
[2] | PVC (Persistent Volume Claim) オブジェクトを定義しての、Pod からのストレージ利用例です。 |
[root@dlp ~]#
vi my-pvc.yml apiVersion: v1 kind: PersistentVolumeClaim metadata: # 任意の PVC 名 name: my-pvc spec: # アクセスモード: # - ReadWriteMany (複数ノード RW) # - ReadWriteOnce (単一ノード RW) # - ReadOnlyMany (複数ノード R) accessModes: - ReadWriteOnce # microk8s-hostpath を指定 storageClassName: microk8s-hostpath resources: requests: # 利用したいストレージのサイズ storage: 1Gi
[root@dlp ~]#
[root@dlp ~]# microk8s kubectl create -f my-pvc.yml persistentvolumeclaim/my-pvc created microk8s kubectl get pv NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE pvc-d23a629b-67e9-4cc1-b0b6-dde3a8c60ddf 1Gi RWO Delete Bound default/my-pvc microk8s-hostpath 5s[root@dlp ~]# microk8s kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE my-pvc Bound pvc-d23a629b-67e9-4cc1-b0b6-dde3a8c60ddf 1Gi RWO microk8s-hostpath 29s
apiVersion: v1
kind: Pod
metadata:
name: nginx-mypv
labels:
name: nginx-mypv
spec:
containers:
- name: nginx-mypv
image: fedora/nginx
ports:
- name: web
containerPort: 80
volumeMounts:
- name: my-persistent-volume
mountPath: /usr/share/nginx/html
volumes:
- name: my-persistent-volume
persistentVolumeClaim:
# 事前に定義した PVC 名を指定
claimName: my-pvc
[root@dlp ~]#
[root@dlp ~]# microk8s kubectl create -f nginx-mypv.yml pod/nginx-mypv created microk8s kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES nginx-mypv 1/1 Running 0 25s 10.1.68.28 dlp.srv.world <none> <none> # PVC の Path 確認 [root@dlp ~]# microk8s kubectl describe -n kube-system pod/hostpath-provisioner-75fdc8fccd-fnsrv | grep PV_DIR PV_DIR: /var/snap/microk8s/common/default-storage[root@dlp ~]# microk8s kubectl describe pvc/my-pvc | grep ^Volume: Volume: pvc-d23a629b-67e9-4cc1-b0b6-dde3a8c60ddf # テストページ作成 [root@dlp ~]# echo "Hello MicroK8s" > /var/snap/microk8s/common/default-storage/default-my-pvc-pvc-d23a629b-67e9-4cc1-b0b6-dde3a8c60ddf/index.html
# アクセスして確認 [root@dlp ~]# curl 10.1.68.28 Hello MicroK8s |
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