rh9 nfs 服务 mount 时 提示 RPC timed out ? 急急急！

tangxn_1

rh9 做服务器，开启 dhcp、named、 tftp、nfs 服务，实现linux系统远程安装。搭建好之后一切工作正常。但这两天nfs 服务突然出现了问题。安装进程进行到挂载nfs 目录时长时间等待：

rh9 nfs 服务 mount 时 提示 RPC timed out
在客户端挂载时提示RPC timed out

/etc/exports 文件配置信息

/nfs                     *(ro,sync,no_root_squash)

/var/log/messages  文件中的相关log
Jan 20 09:50:54 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:869 for /nfs/rh8 (/nfs)
Jan 20 09:51:14 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:869 for /nfs/rh8 (/nfs)
Jan 20 09:51:34 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:869 for /nfs/rh8 (/nfs)
Jan 20 09:51:54 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:869 for /nfs/rh8 (/nfs)
Jan 20 09:52:54 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:869 for /nfs/rh8 (/nfs)
Jan 20 09:53:14 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:870 for /nfs/rh8 (/nfs)
Jan 20 09:53:34 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:870 for /nfs/rh8 (/nfs)
Jan 20 09:53:54 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:870 for /nfs/rh8 (/nfs)
Jan 20 09:58:49 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:904 for /nfs/rf4.1 (/nfs)
Jan 20 09:59:09 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:904 for /nfs/rf4.1 (/nfs)
Jan 20 10:00:09 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:904 for /nfs/rf4.1 (/nfs)
Jan 20 10:03:19 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:967 for /nfs/rf4.1 (/nfs)
Jan 20 10:03:39 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:967 for /nfs/rf4.1 (/nfs)
Jan 20 10:03:59 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:967 for /nfs/rf4.1 (/nfs)
Jan 20 10:04:19 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:967 for /nfs/rf4.1 (/nfs)
Jan 20 10:05:19 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:967 for /nfs/rf4.1 (/nfs)
Jan 20 10:05:39 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:968 for /nfs/rh8 (/nfs)
Jan 20 10:05:59 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:968 for /nfs/rh8 (/nfs)
Jan 20 10:06:19 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:968 for /nfs/rh8 (/nfs)
Jan 20 10:06:39 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:968 for /nfs/rh8 (/nfs)
Jan 20 10:07:39 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:968 for /nfs/rh8 (/nfs)
Jan 20 10:07:59 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:970 for /nfs/rh8 (/nfs)
Jan 20 10:09:59 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:970 for /nfs/rh8 (/nfs)
Jan 20 10:13:12 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:835 for /nfs/rh8 (/nfs)
Jan 20 10:13:32 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:835 for /nfs/rh8 (/nfs)
Jan 20 10:13:52 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:835 for /nfs/rh8 (/nfs)
Jan 20 10:14:12 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:835 for /nfs/rh8 (/nfs)
Jan 20 10:15:12 linuxserver rpc.mountd: authenticated mount request from 192.168.117.10:835 for /nfs/rh8 (/nfs)
Jan 20 10:25:12 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:25:32 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:25:52 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:26:12 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:26:32 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:26:52 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)
Jan 20 10:27:12 linuxserver rpc.mountd: authenticated unmount request from 192.168.117.10:957 for /nfs/rh8 (/nfs)

rpc.mount 提示有连接请求：/var/lib/nfs/rmtab 中有相关信息

192.168.116.102:/nfs/rf4_sata:0x0000001c
192.168.117.10:/nfs/rh8:0x00000023
192.168.117.10:/nfs/rf4:0x0000000e


请高手指点！

曾浩峰

防火墙的问题，你先用iptables -F临时清除一下防火墙，然后在mount试试

tangxn_1

试过了，还是不行呀！

郁闷！ :confused:

linux_now

mount时候加上ro选项试试

tangxn_1

:thank 我试试吧

但是nfs 安装linux 系统的时候就麻烦了！ 安装进程不会要你手动去输入 mount 参数的。

tangxn_1

索性把 iptables 服务关掉了，一试还是不行。

客户端（远程安装程序）挂载 nfs 时 ，服务器端 网络响应特别慢跟死掉了似的。

以下是tcpdump 抓包的log

[root@linuxserver log]#tcpdump -a host 192.168.117.17
tcpdump: listening on eth0
1342235109 packets received by filter
1342229840 packets dropped by kernel
[root@linuxserver log]#

抓包中的部分纪录

03:11:15.367641 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367654 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367667 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367680 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367693 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367706 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367719 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367732 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367745 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367758 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)
03:11:15.367771 192.168.117.17.623 > linuxserver.lenovocdb.32771: udp 96 (DF)

请高手指教！

tangxn_1

还有一个奇怪的现象：

使用rpm 安装方式， 先卸载 nfs-utils  后，再重新安装 ，启动服务，第一次使用nfs 安装 redhat 8.0 可以挂在成功， 中断安装过程，再进行第二次安装 就会出现前面遇到的问题。

还想请教一下，nfs 和安装的 linux 发行版本有关系吗？ 我的服务器上有 rh8.0 rh9.0 fc2 fc3 redflag 4.0 redflag 4.1 这些版本！ 单以前都至少成功安装过一次。

tangxn_1

问题基本解决！

多等一段时间就可以了！  不过有时候确实要考验你的忍耐极限！

tangxn_1

另外想问一下搞过linux远程自动安装的朋友：

自动安装脚本 ks.cfg 如何在配置文件中设置，应该放在服务器的什么位置？

我的服务器大概介绍: 客户端通过pxe 引导 isolinux 的配置文件（pxelinux.0) default,然后通过tftp服务下载kernel 和 ramdisk ，启动linux的安装，在通过 nfs 或 ftp 服务 将安装需要的 rpm 文件加载过来！


就是想问一下 default 文件中  append 字段 ks 选想时怎么使用的，我该使用什么服务把ks.cfg 贾载过来！