MicroK8s : Enable Storage2021/04/07 |
To enable MicroK8s built-in Storage, Configure like follows.
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[1] | Enable built-in Storage on primary Node. |
[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 starts [root@dlp ~]# microk8s kubectl -n kube-system get pods NAME READY STATUS RESTARTS AGE metrics-server-8bbfb4bdb-h6hsr 1/1 Running 0 21m calico-kube-controllers-847c8c99d-cglw5 1/1 Running 1 144m calico-node-nlzz4 1/1 Running 0 41m coredns-86f78bb79c-nvfqr 1/1 Running 0 21m kubernetes-dashboard-7ffd448895-hp574 1/1 Running 0 21m dashboard-metrics-scraper-6c4568dc68-fzngj 1/1 Running 0 21m hostpath-provisioner-5c65fbdb4f-7kxjw 1/1 Running 0 41s |
[2] | This is an example to use storage on a Pod to define PVC (Persistent Volume Claim) object. |
[root@dlp ~]#
vi my-pvc.yml apiVersion: v1 kind: PersistentVolumeClaim metadata: # any PVC name name: my-pvc spec: # access mode: # - ReadWriteMany (RW from multi nodes) # - ReadWriteOnce (RW from a node) # - ReadOnlyMany (R from multi nodes) accessModes: - ReadWriteOnce # specify microk8s-hostpath storageClassName: microk8s-hostpath resources: requests: # storage size to use 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-573d1393-6721-45e2-af2f-24d4ccd047ff 1Gi RWO Delete Bound default/my-pvc microk8s-hostpath 2s[root@dlp ~]# microk8s kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE my-pvc Bound pvc-573d1393-6721-45e2-af2f-24d4ccd047ff 1Gi RWO microk8s-hostpath 32s
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:
# specify PVC name you defined
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 22s 10.1.142.78 dlp.srv.world <none> <none> # confirm PVC Path [root@dlp ~]# microk8s kubectl describe -n kube-system pod/hostpath-provisioner-5c65fbdb4f-7kxjw | grep PV_DIR PV_DIR: /var/snap/microk8s/common/default-storage[root@dlp ~]# microk8s kubectl describe pvc/my-pvc | grep ^Volume: Volume: pvc-573d1393-6721-45e2-af2f-24d4ccd047ff # create a test page [root@dlp ~]# echo "Hello MicroK8s external Storage" > /var/snap/microk8s/common/default-storage/default-my-pvc-pvc-573d1393-6721-45e2-af2f-24d4ccd047ff/index.html
# access to verify [root@dlp ~]# curl 10.1.142.78 Hello MicroK8s external Storage |
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