flexvolume如何升级cpfs-client

容器服务中CPFS 升级包含两部分:

Flexvolume-cpfs 插件升级;

CPFS-Client 驱动升级;

PS:flexvolume-cpfs插件只支持cpfs-client驱动安装,不支持驱动升级。所以需要先升级flexvolume-cpfs插件,再手动升级cpfs-client底层驱动;

下面提供两种方法完成CPFS升级:

  1. 采用ECS的自动运维服务(OOS方式),在多个worker节点同时执行cpfs-client升级脚本;(此方法需要先将目标节点排水,然后在节点上执行升级脚本等操作;)
  2. 先将flexvolume-cpfs升级到目标版本,通过弹性运维(弹出新节点,业务迁移到新节点,旧节点缩掉);

推荐您使用方法2来实现升级过程;步骤如下:

步骤1:升级Flexvolume-cpfs;

将flexvolume的镜像升级到目标版本(v1.14.8.96-0d85fd1-aliyun)版本。

配置flexvolume的container增加env变量,定义cpfs-client驱动版本:

        - name: CPFS_VERSION
          value: 2.10.8-202
        - name: DKMS_VERSION
          value: 1.0.0-208
        - name: CPFS_URL_PREFIX
          value: https://cpfs-client.oss-cn-beijing.aliyuncs.com/centos
CPFS_VERSION是cpfs-client的version;

DKMS_VERSION是cpfs-dkms-client的version;

CPFS_URL_PREFIX是下载指定cpfs版本的url前缀路径;

flexvolume-cpfs的yaml模板,执行升级命令:

$ kubectl apply -f flexvolume-cpfs.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: flexvolume-cpfs
  namespace: kube-system
  labels:
    k8s-volume: flexvolume-cpfs
spec:
  selector:
    matchLabels:
      name: flexvolume-cpfs
  template:
    metadata:
      labels:
        name: flexvolume-cpfs
    spec:
      hostPID: true
      hostNetwork: true
      tolerations:
      - operator: "Exists"
      priorityClassName: system-node-critical
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: type
                operator: NotIn
                values:
                - virtual-kubelet
      containers:
      - name: flexvolume-cpfs
        image: registry.cn-hangzhou.aliyuncs.com/acs/flexvolume:v1.14.8.96-0d85fd1-aliyun
        imagePullPolicy: Always
        securityContext:
          privileged: true
        env:
        - name: ACS_CPFS
          value: "true"
        - name: FIX_ISSUES
          value: "false"
        - name: CPFS_VERSION
          value: 2.10.8-202
        - name: DKMS_VERSION
          value: 1.0.0-208
        - name: CPFS_URL_PREFIX
          value: https://cpfs-client.oss-cn-beijing.aliyuncs.com/centos
        livenessProbe:
          exec:
            command:
            - sh
            - -c
            - ls /acs/flexvolume
          failureThreshold: 8
          initialDelaySeconds: 15
          periodSeconds: 60
          successThreshold: 1
          timeoutSeconds: 15
        volumeMounts:
        - name: usrdir
          mountPath: /host/usr/
        - name: etcdir
          mountPath: /host/etc/
        - name: logdir
          mountPath: /var/log/alicloud/
        - mountPath: /var/lib/kubelet
          mountPropagation: Bidirectional
          name: kubeletdir
      volumes:
      - name: usrdir
        hostPath:
          path: /usr/
      - name: etcdir
        hostPath:
          path: /etc/
      - name: logdir
        hostPath:
          path: /var/log/alicloud/
      - hostPath:
          path: /var/lib/kubelet
          type: Directory
        name: kubeletdir
  updateStrategy:
    rollingUpdate:
      maxUnavailable: 10%
    type: RollingUpdate

步骤2:业务迁移

弹出新节点:flexvolume-cpfs升级完成后,新弹出的节点会自动安装新版本的cpfs-client;

业务迁移:将老节点的pod排水到新弹出的节点上;

缩掉旧节点,完成业务迁移后,将老节点删除;

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