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启动时自动NFS挂载会间歇性失败、因为客户端的挂载尝试超时

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适用场景

  • ONTAP 9
  • NFS

问题描述

  • 客户端主机已配置为在启动时自动挂载NFS导出、但有时NFS导出不会挂载
  • 在NFS服务器上、启用了NFSv3、禁用了NFSv4
  • 数据包跟踪显示、客户端尝试挂载NFSv4但失败、等待、然后不会完全尝试挂载nfs4
    1. 客户端 通过发送启动NFSv4挂载操作步骤V4 NULL Call
    2. 服务器回复为 V4 NULL Reply RPC Accept Error: remote can't support version # (low=3, high=3),表示NFSv4已禁用
    3. 客户端在一段时间内不发送任何流量
    4. 客户端通过发送启动NFSv3挂载操作步骤V2 GETPORT Call NFS V:3 TCP
    5. 客户端从不发送 V3 MNT Call /nfs_export,完成NFSv3挂载操作步骤需要发送
  • 客户端主机的 事件日志显示挂载过程超时
    • Feb 21 14:25:27 crdmsaptz7f40 systemd[1]: Mounting /path/to/nfs_export... Feb 21 14:26:57 crdmsaptz7f40 systemd[1]: nfs_export.mount mounting timed out. Stopping. Feb 21 14:26:57 crdmsaptz7f40 systemd[1]: nfs_export.mount mount process exited, code=killed status=15 Feb 21 14:26:57 crdmsaptz7f40 systemd[1]: Failed to mount /path/to/nfs_export.

 

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