做光驱NFS映射所要注意的地方

做光驱NFS映射可以避免在各分区做光驱的DLPAR操作。具体操作步骤如下：

 

1.在有光驱的机器启动以下服务：

#startsrc -s portmap
0513-059 The portmap Subsystem has been started. Subsystem PID is 479330.
#startsrc -g nfs
0513-059 The biod Subsystem has been started. Subsystem PID is 471050.
0513-059 The nfsd Subsystem has been started. Subsystem PID is 659672.
0513-059 The rpc.mountd Subsystem has been started. Subsystem PID is 430118.
0513-059 The nfsrgyd Subsystem has been started. Subsystem PID is 749700.
0513-059 The gssd Subsystem has been started. Subsystem PID is 745646.
0513-059 The rpc.lockd Subsystem has been started. Subsystem PID is 749702.
0513-059 The rpc.statd Subsystem has been started. Subsystem PID is 708646.

 

2.mount cdrom

 

3.将/cdrom加入export list中：

#smit mknf***p

 

                    Add a Directory to Exports List

Type or select values in entry fields.
Press Enter AFTER making all desired changes.

[TOP]                                                   [Entry Fields]
* Pathname of directory to export                    [/cdrom]                                                    /
  Anonymous UID                                      [-2]                                                       
  Public filesystem?                                  no                                                        +
* Export directory now, system restart or both        now                                                       +
  Pathname of alternate exports file                 []                                                         
  Allow access by NFS versions                       []                                                         +
  External name of directory (NFS V4 access only)    []
* Security method                                    [sys,krb5p,krb5i,krb5,dh,none]                             +
*     Mode to export directory                        read-only                                                 +
      Hostname list. If exported read-mostly         []
      Hosts & netgroups allowed client access        []
      Hosts allowed root access                      [ptcdb]                                                    
  Security method                                    []                                                         +
[MORE...19]       

 

4.#showmount -e
export list for ptctest:
/cdrom (everyone)

 

5.在要需要使用光驱的服务器做如下操作：

#startsrc -s portmap
0513-059 The portmap Subsystem has been started. Subsystem PID is 635230.
#startsrc -g nfs
0513-059 The biod Subsystem has been started. Subsystem PID is 221412.
0513-059 The nfsd Subsystem has been started. Subsystem PID is 331812.
0513-059 The rpc.mountd Subsystem has been started. Subsystem PID is 229550.
0513-059 The nfsrgyd Subsystem has been started. Subsystem PID is 340110.
0513-059 The gssd Subsystem has been started. Subsystem PID is 311462.
0513-059 The rpc.lockd Subsystem has been started. Subsystem PID is 340112.
0513-059 The rpc.statd Subsystem has been started. Subsystem PID is 364598.

 

6.创建挂载点：

#mkdir rom

 

7.观察导出的文件系统：

##showmount -e ptctest     --ptctest是有光驱的那台机器
export list for ptctest:
/cdrom (everyone)

 

8.mount操作：

#mount ptctest:/cdrom /rom

 

 

配置过程中典型的错误：

1.nfsmnthelp: 1831-019 ptctest: System call error number -1.

mount: 1831-008 giving up on:
ptctest:/cdrom
System call error number -1.

 

--这是因为HOSTS文件的问题。检查hosts文件看看是否有错，比如不正确的mapping。两台机器的HOSTS文件要能正确的解析对方的主机名。

 

2.mount: 1831-011 access denied for ...

默认情况下是防止ROOT用户操作NFS的，所以在mknf***p中的Hosts allowed root access选项中可以明确的填上要共享光驱的主机名。在第一次操作的时候我就遇到了这样的问题，但在第二次进行配置的时候却重现不了这样的问题，有点奇怪。

 

3.NFS跟.rhosts文件无关；服务器和客户端的安全认证方式在AIX5.3版本上要一致；挂载点最好不在/etc/filesystems中。