Ceph 与 StorageClass 集成

ceph osd lspools

# 查看 ceph 的用户认证信息
ceph auth list

# 查看 ceph 集群 monitor 的信息 
ceph mon dump

# 生成CEPH-CSI 配置映射
mkdir /data/csi
cd /data/csi

# ceph-csi 需要存储在 Kubernetes 中的 ConfigMap 对象来定义 Ceph 群集的 Ceph 监视器地址。
vi csi-config-map.yaml 
---
apiVersion: v1
kind: ConfigMap
data:
  config.json: |-
    [
      {
        "clusterID": "af7a6791-5fc8-484e-b170-68828097d55b",
        "monitors": [
          "192.168.31.207:6789",
          "192.168.31.159:6789",
          "192.168.31.198:6789"
        ]
      }
    ]
metadata:
  name: ceph-csi-config


kubectl apply -f csi-config-map.yaml

kubectl get configmap

# 创建 CEPH-CSI SECRET
ceph auth list|grep -A 4 client.admin

# 注意：因为kubernetes用户会报错，我使用的 admin 用户
vi csi-rbd-secret.yaml 
---
apiVersion: v1
kind: Secret
metadata:
  name: csi-rbd-secret
  namespace: default
stringData:
  userID: admin
  userKey: AQC3PpVged1WHBAANe1mTE4mS/CGkplYdhxqVw==

kubectl apply -f csi-rbd-secret.yaml

kubectl get secret

kubectl get secret csi-rbd-secret -o yaml
echo YWRtaW4= | base64 -d

# 配置 CEPH-CSI 插件
# 创建所需的ServiceAccount和 RBAC群集区域/群集区域绑定 kubernetes 对象。这些对象不一定需要针对您的 Kubernetes 环境进行自定义，因此可以从ceph-csi 部署 YAM使用：

wget https://raw.githubusercontent.com/ceph/ceph-csi/master/deploy/rbd/kubernetes/csi-provisioner-rbac.yaml
kubectl apply -f csi-provisioner-rbac.yaml

wget https://raw.githubusercontent.com/ceph/ceph-csi/master/deploy/rbd/kubernetes/csi-nodeplugin-rbac.yaml
kubectl apply -f csi-nodeplugin-rbac.yaml 

# 创建ceph-csi预配和节点插件,注意镜像问题，可能需要FQ下载
wget https://raw.githubusercontent.com/ceph/ceph-csi/master/deploy/rbd/kubernetes/csi-rbdplugin-provisioner.yaml
kubectl apply -f csi-rbdplugin-provisioner.yaml

wget https://raw.githubusercontent.com/ceph/ceph-csi/master/deploy/rbd/kubernetes/csi-rbdplugin.yaml
kubectl apply -f csi-rbdplugin.yaml

wget https://raw.githubusercontent.com/ceph/ceph-csi/devel/examples/kms/vault/kms-config.yaml
kubectl apply -f kms-config.yaml

kubectl get configmap

kubectl get secrets

# 创建存储类
# Kubernetes存储类定义存储类。可以创建多个 StorageClass 对象以映射到不同的服务
# 确保下面的 clusterID 为 ceph cluster  id
vi csi-rbd-sc.yaml 
---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: csi-rbd-sc
provisioner: rbd.csi.ceph.com
parameters:
   clusterID: af7a6791-5fc8-484e-b170-68828097d55b
   pool: kubernetes
   csi.storage.k8s.io/provisioner-secret-name: csi-rbd-secret
   csi.storage.k8s.io/provisioner-secret-namespace: default
   csi.storage.k8s.io/node-stage-secret-name: csi-rbd-secret
   csi.storage.k8s.io/node-stage-secret-namespace: default
   imageFormat: "2"
   imageFeatures: "layering"
reclaimPolicy: Delete
mountOptions:
   - discard

kubectl apply -f csi-rbd-sc.yaml 
kubectl get sc

# 创建的基于ceph-csi 的基于 cephfs PVC ，可以使用以下 YAML 从csi-rbd-sc存储类请求装载的文件系统（由 RBD image 支持）
cat filesystem-pvc.yaml
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: filesystem-rbd-pvc
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi
  storageClassName: csi-rbd-sc

kubectl apply -f filesystem-pvc.yaml

cat filesystem-pod.yaml
---
apiVersion: v1
kind: Pod
metadata:
  name: csi-rbd-demo-pod
spec:
  containers:
    - name: web-server
      image: nginx
      volumeMounts:
        - name: mypvc
          mountPath: /var/lib/www/html
  volumes:
    - name: mypvc
      persistentVolumeClaim:
        claimName: filesystem-rbd-pvc
        readOnly: false

kubectl apply -f filesystem-pod.yaml

创建 StatefulSet 进行测试

cat statefulset-pod.yaml 
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: web
spec:
  selector:
    matchLabels:
      app: nginx
  serviceName: "nginx"
  replicas: 3
  template:
    metadata:
      labels:
        app: nginx
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80
          name: web
        volumeMounts:
        - name: www
          mountPath: /var/lib/www/html
  volumeClaimTemplates:
    - metadata:
        name: www
      spec:
        accessModes: [ "ReadWriteOnce" ]
        storageClassName: "csi-rbd-sc"
        resources:
          requests:
            storage: 1Gi

kubectl apply -f statefulset-pod.yaml