MicroK8s : Storage を有効にする2021/05/13 |
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 metrics-server-8bbfb4bdb-sczq9 1/1 Running 0 9m53s kube-system calico-kube-controllers-847c8c99d-92dm5 1/1 Running 1 45m kube-system kubernetes-dashboard-7ffd448895-6cgrz 1/1 Running 0 9m49s kube-system calico-node-9wpkd 1/1 Running 0 26m kube-system dashboard-metrics-scraper-6c4568dc68-5g2x2 1/1 Running 0 9m49s kube-system coredns-86f78bb79c-xcbkm 1/1 Running 0 9m48s kube-system hostpath-provisioner-5c65fbdb4f-bvzbp 1/1 Running 0 13s |
[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-abd1cd25-0ac2-4ae0-8f02-ce67063cbaeb 1Gi RWO Delete Bound default/my-pvc microk8s-hostpath 4sroot@dlp:~# microk8s kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE my-pvc Bound pvc-abd1cd25-0ac2-4ae0-8f02-ce67063cbaeb 1Gi RWO microk8s-hostpath 30s
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 19s 10.1.142.78 dlp.srv.world <none> <none> # PVC の Path 確認 root@dlp:~# microk8s kubectl describe -n kube-system pod/hostpath-provisioner-5c65fbdb4f-bvzbp | grep PV_DIR PV_DIR: /var/snap/microk8s/common/default-storageroot@dlp:~# microk8s kubectl describe pvc/my-pvc | grep ^Volume: Volume: pvc-abd1cd25-0ac2-4ae0-8f02-ce67063cbaeb # テストページ作成 root@dlp:~# echo "Hello MicroK8s Storage" > /var/snap/microk8s/common/default-storage/default-my-pvc-pvc-abd1cd25-0ac2-4ae0-8f02-ce67063cbaeb/index.html
# アクセスして確認 root@dlp:~# curl 10.1.142.78 Hello MicroK8s Storage |
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