K8s集群使用NFS-server

1. 安装nfs-server

sudo apt install nfs-kernel-server -y
# 创建共享目录
mkdir -pv /nfs-share
chown -R nobody:nobody /nfs-share
chmod 777 /nfs-share

# 编辑exports添加共享配置
vim /etc/exports
/nfs-share *(rw,sync,no_root_squash,no_subtree_check)

exportfs -a
systemctl restart nfs-kernel-server

# 验证 
showmount -e 172.16.56.204

2. k8s集群安装NFS-client-provider(SC)

helm repo add nfs-subdir-external-provisioner https://kubernetes-sigs.github.io/nfs-subdir-external-provisioner/
helm repo update
helm install nfs-provisioner nfs-subdir-external-provisioner/nfs-subdir-external-provisioner \
--set nfs.server=172.16.56.204 \
--set nfs.path=/nfs-share

3. k8s集群的节点全部安装nfs客户端工具，否则pod将一直处于pending状态

错误如下:

  nfs-subdir-external-provisioner-root:
    Type:      NFS (an NFS mount that lasts the lifetime of a pod)
    Server:    172.16.56.204
    Path:      /nfs-share
    ReadOnly:  false
  kube-api-access-ldkpb:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason       Age                  From     Message
  ----     ------       ----                 ----     -------
  Warning  FailedMount  76s (x65 over 117m)  kubelet  MountVolume.SetUp failed for volume "nfs-subdir-external-provisioner-root" : mount failed: exit status 32
Mounting command: mount
Mounting arguments: -t nfs 172.16.56.204:/nfs-share /var/lib/kubelet/pods/d6ae52f8-4539-4f10-a9c0-29a766c05117/volumes/kubernetes.io~nfs/nfs-subdir-external-provisioner-root
Output: mount: /var/lib/kubelet/pods/d6ae52f8-4539-4f10-a9c0-29a766c05117/volumes/kubernetes.io~nfs/nfs-subdir-external-provisioner-root: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program.