OpenShift4 通过 csi 对接外部 ceph rbd

概述

虽然红帽推出了ocs作为运行在openshift上面的云原生存储，但是实际客户现场基本上是没法做到，因为大部分容器中间件团队和存储是两个团队，将ceph运行在openshift上面，增加了ceph运维的难度和故障排查；而且ocs还要单独收费，貌似买红帽ceph的客户本来就不多，大多数还是以社区或者xsky等为主，ocs的基本功能使用起来很方便，但是需要做一些干预或者出现故障的时候就挺麻烦的了，ceph入门简单，深入还是有难度，得靠经验。

创建相关文件

  • csi-nodeplugin-rbac.yaml

我使用test-1这个项目，以下文件中namespace根据具体环境做修改。

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: rbd-csi-nodeplugin

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-csi-nodeplugin
aggregationRule:
  clusterRoleSelectors:
    - matchLabels:
        rbac.rbd.csi.ceph.com/aggregate-to-rbd-csi-nodeplugin: "true"
rules: []
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-csi-nodeplugin-rules
  labels:
    rbac.rbd.csi.ceph.com/aggregate-to-rbd-csi-nodeplugin: "true"
rules:
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get", "list"]
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "update"]
  - apiGroups: [""]
    resources: ["namespaces"]
    verbs: ["get", "list"]
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["volumeattachments"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: [""]
    resources: ["configmaps"]
    verbs: ["get", "list"]

---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-csi-nodeplugin
subjects:
  - kind: ServiceAccount
    name: rbd-csi-nodeplugin
    namespace: test-1
roleRef:
  kind: ClusterRole
  name: rbd-csi-nodeplugin
  apiGroup: rbac.authorization.k8s.io
  • csi-provisioner-rbac.yaml

我使用test-1这个项目，以下文件中namespace根据具体环境做修改。

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: rbd-csi-provisioner

---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-external-provisioner-runner
aggregationRule:
  clusterRoleSelectors:
    - matchLabels:
        rbac.rbd.csi.ceph.com/aggregate-to-rbd-external-provisioner-runner: "true"
rules: []
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-external-provisioner-runner-rules
  labels:
    rbac.rbd.csi.ceph.com/aggregate-to-rbd-external-provisioner-runner: "true"
rules:
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["secrets"]
    verbs: ["get", "list"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["list", "watch", "create", "update", "patch"]
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "create", "update", "delete", "patch"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshots"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshotcontents"]
    verbs: ["create", "get", "list", "watch", "update", "delete"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshotclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["apiextensions.k8s.io"]
    resources: ["customresourcedefinitions"]
    verbs: ["create", "list", "watch", "delete", "get", "update"]
  - apiGroups: ["csi.storage.k8s.io"]
    resources: ["csinodeinfos"]
    verbs: ["get", "list", "watch"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["volumeattachments"]
    verbs: ["get", "list", "watch", "update", "patch"]
  - apiGroups: ["snapshot.storage.k8s.io"]
    resources: ["volumesnapshots/status"]
    verbs: ["update"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims/status"]
    verbs: ["update", "patch"]

---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-csi-provisioner-role
subjects:
  - kind: ServiceAccount
    name: rbd-csi-provisioner
    namespace: test-1
roleRef:
  kind: ClusterRole
  name: rbd-external-provisioner-runner
  apiGroup: rbac.authorization.k8s.io

---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  # replace with non-default namespace name
  namespace: test-1
  name: rbd-external-provisioner-cfg
rules:
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get", "watch", "list", "delete", "update", "create"]
  - apiGroups: [""]
    resources: ["configmaps"]
    verbs: ["get", "list", "watch", "create", "delete"]
  - apiGroups: ["coordination.k8s.io"]
    resources: ["leases"]
    verbs: ["get", "watch", "list", "delete", "update", "create"]

---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: rbd-csi-provisioner-role-cfg
  # replace with non-default namespace name
  namespace: test-1
subjects:
  - kind: ServiceAccount
    name: rbd-csi-provisioner
    # replace with non-default namespace name
    namespace: test-1
roleRef:
  kind: Role
  name: rbd-external-provisioner-cfg
  apiGroup: rbac.authorization.k8s.io
  • csi-rbd-secret.yaml

拿到对应ceph用户和key，注意以下如果自己创建secret文件，里面的key需要是明文的，如果是在已经创建好的secret，里面则是加密后的。

---
apiVersion: v1
kind: Secret
metadata:
  name: csi-rbd-secret
  namespace: test-1
stringData:
  # Key values correspond to a user name and its key, as defined in the
  # ceph cluster. User ID should have required access to the 'pool'
  # specified in the storage class
  userID: admin
  userKey: AQAuoOxcR2rdNxAAQ1zRi8FflLYipA5Q/9Btng==
type: kubernetes.io/rbd
  • csi-config-map.yaml

修改下mon地址和集群id

---
apiVersion: v1
kind: ConfigMap
data:
  config.json: |-
    [
      {
    "clusterID": "c57f4132-4dc1-4b38-8276-32dfd29f6547",
    "monitors": [
      "172.31.20.150:6789"
    ]
      }
    ]
metadata:
  name: ceph-csi-config
  • csi-rbdplugin.yaml

无需修改

---
kind: DaemonSet
apiVersion: apps/v1
metadata:
  name: csi-rbdplugin
spec:
  selector:
    matchLabels:
      app: csi-rbdplugin
  template:
    metadata:
      labels:
        app: csi-rbdplugin
    spec:
      serviceAccount: rbd-csi-nodeplugin
      hostNetwork: true
      hostPID: true
      # to use e.g. Rook orchestrated cluster, and mons' FQDN is
      # resolved through k8s service, set dns policy to cluster first
      dnsPolicy: ClusterFirstWithHostNet
      containers:
        - name: driver-registrar
          # This is necessary only for systems with SELinux, where
          # non-privileged sidecar containers cannot access unix domain socket
          # created by privileged CSI driver container.
          securityContext:
            privileged: true
          image: quay.io/k8scsi/csi-node-driver-registrar:v1.2.0
          args:
            - "--v=5"
            - "--csi-address=/csi/csi.sock"
            - "--kubelet-registration-path=/var/lib/kubelet/plugins/rbd.csi.ceph.com/csi.sock"
          lifecycle:
            preStop:
              exec:
                command: [
                  "/bin/sh", "-c",
                  "rm -rf /registration/rbd.csi.ceph.com \
                  /registration/rbd.csi.ceph.com-reg.sock"
                ]
          env:
            - name: KUBE_NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - name: registration-dir
              mountPath: /registration
        - name: csi-rbdplugin
          securityContext:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
          # for stable functionality replace canary with latest release version
          image: quay.io/cephcsi/cephcsi:canary
          args:
            - "--nodeid=$(NODE_ID)"
            - "--type=rbd"
            - "--nodeserver=true"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--v=5"
            - "--drivername=rbd.csi.ceph.com"
            - "--metricsport=8090"
            - "--metricspath=/metrics"
            - "--enablegrpcmetrics=false"
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
            - name: CSI_ENDPOINT
              value: unix:///csi/csi.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - mountPath: /dev
              name: host-dev
            - mountPath: /sys
              name: host-sys
            - mountPath: /lib/modules
              name: lib-modules
              readOnly: true
            - name: ceph-csi-config
              mountPath: /etc/ceph-csi-config/
            - name: plugin-dir
              mountPath: /var/lib/kubelet/plugins
              mountPropagation: "Bidirectional"
            - name: mountpoint-dir
              mountPath: /var/lib/kubelet/pods
              mountPropagation: "Bidirectional"
            - name: keys-tmp-dir
              mountPath: /tmp/csi/keys
        - name: liveness-prometheus
          securityContext:
            privileged: true
          image: quay.io/cephcsi/cephcsi:canary
          args:
            - "--type=liveness"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--metricsport=8680"
            - "--metricspath=/metrics"
            - "--polltime=60s"
            - "--timeout=3s"
          env:
            - name: CSI_ENDPOINT
              value: unix:///csi/csi.sock
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
          imagePullPolicy: "IfNotPresent"
      volumes:
        - name: socket-dir
          hostPath:
            path: /var/lib/kubelet/plugins/rbd.csi.ceph.com
            type: DirectoryOrCreate
        - name: plugin-dir
          hostPath:
            path: /var/lib/kubelet/plugins
            type: Directory
        - name: mountpoint-dir
          hostPath:
            path: /var/lib/kubelet/pods
            type: DirectoryOrCreate
        - name: registration-dir
          hostPath:
            path: /var/lib/kubelet/plugins_registry/
            type: Directory
        - name: host-dev
          hostPath:
            path: /dev
        - name: host-sys
          hostPath:
            path: /sys
        - name: lib-modules
          hostPath:
            path: /lib/modules
        - name: ceph-csi-config
          configMap:
            name: ceph-csi-config
        - name: keys-tmp-dir
          emptyDir: {
            medium: "Memory"
          }
---
# This is a service to expose the liveness and grpc metrics
apiVersion: v1
kind: Service
metadata:
  name: csi-metrics-rbdplugin
  labels:
    app: csi-metrics
spec:
  ports:
    - name: http-metrics
      port: 8080
      protocol: TCP
      targetPort: 8680
    - name: grpc-metrics
      port: 8090
      protocol: TCP
      targetPort: 8090
  selector:
    app: csi-rbdplugin
  • csi-rbdplugin-provisioner.yaml

无需修改

---
kind: Service
apiVersion: v1
metadata:
  name: csi-rbdplugin-provisioner
  labels:
    app: csi-metrics
spec:
  selector:
    app: csi-rbdplugin-provisioner
  ports:
    - name: http-metrics
      port: 8080
      protocol: TCP
      targetPort: 8680
    - name: grpc-metrics
      port: 8090
      protocol: TCP
      targetPort: 8090

---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: csi-rbdplugin-provisioner
spec:
  replicas: 3
  selector:
    matchLabels:
      app: csi-rbdplugin-provisioner
  template:
    metadata:
      labels:
        app: csi-rbdplugin-provisioner
    spec:
      serviceAccount: rbd-csi-provisioner
      containers:
        - name: csi-provisioner
          image: quay.io/k8scsi/csi-provisioner:v1.4.0
          args:
            - "--csi-address=$(ADDRESS)"
            - "--v=5"
            - "--timeout=150s"
            - "--retry-interval-start=500ms"
            - "--enable-leader-election=true"
            - "--leader-election-type=leases"
          env:
            - name: ADDRESS
              value: unix:///csi/csi-provisioner.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
        - name: csi-snapshotter
          image: quay.io/k8scsi/csi-snapshotter:v1.2.2
          args:
            - "--csi-address=$(ADDRESS)"
            - "--v=5"
            - "--timeout=150s"
            - "--leader-election=true"
          env:
            - name: ADDRESS
              value: unix:///csi/csi-provisioner.sock
          imagePullPolicy: Always
          securityContext:
            privileged: true
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
        - name: csi-attacher
          image: quay.io/k8scsi/csi-attacher:v2.1.0
          args:
            - "--v=5"
            - "--csi-address=$(ADDRESS)"
            - "--leader-election=true"
          env:
            - name: ADDRESS
              value: /csi/csi-provisioner.sock
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
        - name: csi-resizer
          image: quay.io/k8scsi/csi-resizer:v0.4.0
          args:
            - "--csi-address=$(ADDRESS)"
            - "--v=5"
            - "--csiTimeout=150s"
            - "--leader-election"
          env:
            - name: ADDRESS
              value: unix:///csi/csi-provisioner.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
        - name: csi-rbdplugin
          securityContext:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
          # for stable functionality replace canary with latest release version
          image: quay.io/cephcsi/cephcsi:canary
          args:
            - "--nodeid=$(NODE_ID)"
            - "--type=rbd"
            - "--controllerserver=true"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--v=5"
            - "--drivername=rbd.csi.ceph.com"
            - "--pidlimit=-1"
            - "--metricsport=8090"
            - "--metricspath=/metrics"
            - "--enablegrpcmetrics=false"
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
            - name: NODE_ID
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
            - name: CSI_ENDPOINT
              value: unix:///csi/csi-provisioner.sock
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
            - mountPath: /dev
              name: host-dev
            - mountPath: /sys
              name: host-sys
            - mountPath: /lib/modules
              name: lib-modules
              readOnly: true
            - name: ceph-csi-config
              mountPath: /etc/ceph-csi-config/
            - name: keys-tmp-dir
              mountPath: /tmp/csi/keys
        - name: liveness-prometheus
          image: quay.io/cephcsi/cephcsi:canary
          args:
            - "--type=liveness"
            - "--endpoint=$(CSI_ENDPOINT)"
            - "--metricsport=8680"
            - "--metricspath=/metrics"
            - "--polltime=60s"
            - "--timeout=3s"
          env:
            - name: CSI_ENDPOINT
              value: unix:///csi/csi-provisioner.sock
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          volumeMounts:
            - name: socket-dir
              mountPath: /csi
          imagePullPolicy: "IfNotPresent"
      volumes:
        - name: host-dev
          hostPath:
            path: /dev
        - name: host-sys
          hostPath:
            path: /sys
        - name: lib-modules
          hostPath:
            path: /lib/modules
        - name: socket-dir
          emptyDir: {
            medium: "Memory"
          }
        - name: ceph-csi-config
          configMap:
            name: ceph-csi-config
        - name: keys-tmp-dir
          emptyDir: {
            medium: "Memory"
          }

有可能有scc权限文件或者role权限不足，可以执行以下命令解决。

oc adm policy add-scc-to-user privileged -z rbd-csi-nodeplugin
oc adm policy add-scc-to-user privileged -z rbd-csi-provisioner

oc adm policy add-cluster-role-to-user cluster-admin -z rbd-csi-nodeplugin
oc adm policy add-cluster-role-to-user cluster-admin -z rbd-csi-provisioner
  • csi-sc.yaml

修改下namespace、clusterid、pool

---
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
   name: csi-rbd-sc
provisioner: rbd.csi.ceph.com
parameters:
   clusterID: c57f4132-4dc1-4b38-8276-32dfd29f6547
   pool: rbd
   imageFeatures: layering
   csi.storage.k8s.io/provisioner-secret-namespace: test-1
   csi.storage.k8s.io/provisioner-secret-name: csi-rbd-secret
   csi.storage.k8s.io/controller-expand-secret-name: csi-rbd-secret
   csi.storage.k8s.io/controller-expand-secret-namespace: test-1
   csi.storage.k8s.io/node-stage-secret-name: csi-rbd-secret
   csi.storage.k8s.io/node-stage-secret-namespace: test-1
   csi.storage.k8s.io/fstype: ext4
reclaimPolicy: Delete
allowVolumeExpansion: true
mountOptions:
   - discard
  • 创建个pvc，然后挂载到pod
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: rbd-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: csi-rbd-sc

参考链接

https://github.com/openshift/ceph-csi
https://devopstales.github.io/home/k8s-ceph-storage-with-csi-driver/

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