MicroK8s : Storage を有効にする2020/08/04 |
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:~# 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 get pods -A NAMESPACE NAME READY STATUS RESTARTS AGE kube-system coredns-588fd544bf-g9frb 1/1 Running 2 21h kube-system dashboard-metrics-scraper-59f5574d4-67tjr 1/1 Running 2 21h kube-system hostpath-provisioner-75fdc8fccd-2w95n 1/1 Running 0 13s kube-system kubernetes-dashboard-6d97855997-p5hzj 1/1 Running 2 21h kube-system metrics-server-c65c9d66-zzdl6 1/1 Running 2 21h |
[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-93bec44d-d46d-477f-b553-2da40f712849 1Gi RWO Delete Bound default/my-pvc microk8s-hostpath 50sroot@dlp:~# microk8s kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE my-pvc Bound pvc-93bec44d-d46d-477f-b553-2da40f712849 1Gi RWO microk8s-hostpath 53s
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 34m 10.1.21.18 dlp.srv.world <none> <none> # PVC の Path 確認 root@dlp:~# microk8s kubectl describe -n kube-system pod/hostpath-provisioner-75fdc8fccd-2w95n | grep PV_DIR PV_DIR: /var/snap/microk8s/common/default-storageroot@dlp:~# microk8s kubectl describe pvc/my-pvc | grep ^Volume: Volume: pvc-93bec44d-d46d-477f-b553-2da40f712849 # テストページ作成 root@dlp:~# echo "Hello MicroK8s" > /var/snap/microk8s/common/default-storage/default-my-pvc-pvc-93bec44d-d46d-477f-b553-2da40f712849/index.html
# アクセスして確認 root@dlp:~# curl 10.1.21.18 Hello MicroK8s |
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