☰

尽管协议被列为可用，但 NFS 客户端仍会失败并显示“不支持协议”

tag-icon • tag-icon linux nfs gentoo proxmox
尽管协议被列为可用，但 NFS 客户端仍会失败并显示“不支持协议”

我为 Proxmox 设置了一个 NFS 服务器，以便在那里远程备份 VM 映像。由于某种原因，Proxmox 盒无法连接到 NFS 服务器。我测试了与另一台服务器上的另一个 NFS 客户端连接，它工作正常。我不确定哪里出了问题，因为就客户端的命令而言，它做支持这些连接类型（版本 3 和 4）。我不确定我在这里遗漏了什么。

为简单起见，IP 替换为 SERVER_IP 和 CLIENT_IP

坐骑列表：

root@client:~# showmount SERVER_IP -e
Export list for SERVER_IP:
/export/backups CLIENT_IP/32
/export         CLIENT_IP/32

支持的协议列表：

root@client:~# rpcinfo -p SERVER_IP | egrep "service|nfs"
   program vers proto   port  service
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs

尝试挂载远程导出：

root@client: mkdir -p /nfs/backups
root@client:~# mount SERVER_IP:/export/backups /nfs/backups -vv
mount.nfs: timeout set for Wed Apr 27 17:55:34 2016
mount.nfs: trying text-based options 'vers=4,addr=SERVER_IP,clientaddr=CLIENT_IP'
mount.nfs: mount(2): Protocol not supported
mount.nfs: trying text-based options 'addr=SERVER_IP'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying SERVER_IP prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying SERVER_IP prog 100005 vers 3 prot UDP port 38873
mount.nfs: mount(2): Protocol not supported
mount.nfs: Protocol not supported

我的/etc/exports服务器上：

/export CLIENT_IP/32(rw,sync,no_subtree_check,sec=sys,fsid=0)
/export/backups CLIENT_IP/32(rw,sync,no_subtree_check,all_squash,anonuid=1010,anongid=1010)

/export/backups是mount --rbind /home/backups /export/backups。1010 是备份用户的 uid 和 gid。

唯一编辑的设置是/etc/conf.d/nfs：

OPTS_RPC_NFSD="8 -N 2 -V 3 -V 4 -V 4.1"

有人有什么想法吗？提前致谢。

答案1

根据 Zacq 的评论重新启动服务器

这不是任何人在生产 Proxmox 服务器上都想听到的解决方案，但它确实有效。必须有一个 /etc/init.d/[something] 重启类型修复。

和 OP 的症状一模一样。

此外，客户在 dmesg 中抱怨

nfsv3: disagrees about version of symbol nlmclnt_proc
nfsv3: disagrees about version of symbol nfs_alloc_client
nfsv3: disagrees about version of symbol nfs_access_zap_cache
nfsv3: disagrees about version of symbol nfs_submount
nfsv3: disagrees about version of symbol nfs_create_server
nfsv3: disagrees about version of symbol nfs_post_op_update_in$
nfsv3: disagrees about version of symbol nfs_mkdir
nfsv3: disagrees about version of symbol nfs_get_client
nfsv3: disagrees about version of symbol nfs_file_operations
nfsv3: disagrees about version of symbol nfs_lookup
nfsv3: disagrees about version of symbol nfs_getattr
nfsv3: disagrees about version of symbol register_nfs_version
nfsv3: disagrees about version of symbol nfs_setattr
nfsv3: disagrees about version of symbol unregister_nfs_version
nfsv3: disagrees about version of symbol nfs_sops
nfsv3: disagrees about version of symbol nfs_link
nfsv3: disagrees about version of symbol nfs_try_mount
nfsv3: disagrees about version of symbol nfs_close_context
nfsv3: disagrees about version of symbol nfs_symlink
nfsv3: disagrees about version of symbol nfs_clone_server
nfsv3: disagrees about version of symbol nlmclnt_proc
nfsv3: Unknown symbol nfs_writeback_update_inode (err -22)
nfsv3: Unknown symbol nfs_dentry_operations (err -22)

相关内容