使用nfs

部署nfs服务

部署

使用ceph

CephFS方式支持k8s的pv的3种访问模式ReadWriteOnce，ReadOnlyMany ，ReadWriteMany

创建CephFS pool

CephFS需要使用两个Pool来分别存储数据和元数据

ceph osd pool create fs_data 128
ceph osd pool create fs_metadata 128
ceph osd lspools

ceph fs new cephfs fs_metadata fs_data
ceph fs ls

部署cephfs-provisioner

cat >external-storage-cephfs-provisioner.yaml<<EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: cephfs-provisioner
  namespace: kube-system
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: cephfs-provisioner
rules:
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "create", "delete"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["create", "update", "patch"]
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get", "list", "watch", "create", "update", "patch"]
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["create", "get", "delete"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: cephfs-provisioner
subjects:
  - kind: ServiceAccount
    name: cephfs-provisioner
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cephfs-provisioner
  apiGroup: rbac.authorization.k8s.io

---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: cephfs-provisioner
  namespace: kube-system
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["create", "get", "delete"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: cephfs-provisioner
  namespace: kube-system
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: cephfs-provisioner
subjects:
- kind: ServiceAccount
  name: cephfs-provisioner
  namespace: kube-system

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: cephfs-provisioner
  namespace: kube-system
spec:
  selector:
    matchLabels:
      app: cephfs-provisioner
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: cephfs-provisioner
    spec:
      containers:
      - name: cephfs-provisioner
        image: "quay.io/external_storage/cephfs-provisioner:latest"
        env:
        - name: PROVISIONER_NAME
          value: ceph.com/cephfs
        command:
        - "/usr/local/bin/cephfs-provisioner"
        args:
        - "-id=cephfs-provisioner-1"
      serviceAccount: cephfs-provisioner
EOF
kubectl apply -f external-storage-cephfs-provisioner.yaml

配置 storageclass

创建secret

# 查看key 在ceph的mon或者admin节点
ceph auth get-key client.admin
# 创建 admin secret
kubectl create secret generic ceph-secret --type="kubernetes.io/rbd" --from-literal=key=AQCtovZdgFEhARAAoKhLtquAyM8ROvmBv55Jig== --namespace=kube-system
# 查看 secret
kubectl get secret ceph-secret -n kube-system -o yaml

配置 StorageClass

cat >storageclass-cephfs.yaml<<EOF
kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: dynamic-cephfs
provisioner: ceph.com/cephfs
parameters:
    monitors: 10.151.30.125:6789,10.151.30.126:6789,10.151.30.127:6789
    adminId: admin
    adminSecretName: ceph-secret
    adminSecretNamespace: "kube-system"
    claimRoot: /volumes/kubernetes
EOF
kubectl apply -f storageclass-cephfs.yaml
kubectl get sc

测试

创建pvc测试

cat >cephfs-pvc-test.yaml<<EOF
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: cephfs-claim
spec:
  accessModes:     
    - ReadWriteMany
  storageClassName: dynamic-cephfs
  resources:
    requests:
      storage: 2Gi
EOF
kubectl apply -f cephfs-pvc-test.yaml
kubectl get pvc
kubectl get pv

创建 nginx pod 挂载测试

cat >nginx-pod.yaml<<EOF
apiVersion: v1
kind: Pod
metadata:
  name: nginx-pod2
  labels:
    name: nginx-pod2
spec:
  containers:
  - name: nginx-pod2
    image: nginx
    ports:
    - name: web
      containerPort: 80
    volumeMounts:
    - name: cephfs
      mountPath: /usr/share/nginx/html
  volumes:
  - name: cephfs
    persistentVolumeClaim:
      claimName: cephfs-claim
EOF
kubectl apply -f nginx-pod.yaml
# 查看
kubectl get pods -o wide
# 修改文件内容
kubectl exec -ti nginx-pod2 -- /bin/sh -c ‘echo This is from CephFS!!! > /usr/share/nginx/html/index.html‘
# 访问pod测试
curl http://$podip

清理

kubectl delete -f nginx-pod.yaml
kubectl delete -f cephfs-pvc-test.yaml

持久化存储