AIX 6.1 and NFS problem after HACMP config Post: 302315288

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Operating Systems AIX AIX 6.1 and NFS problem after HACMP config Post 302315288 by filosophizer on Tuesday 12th of May 2009 03:58:58 AM

05-12-2009

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**** NFS exports in a resource group *****
NFS filesystem that is managed by HACMP.

* On each node verify that NFS is running or not
# lssrc –g nfs (after HACMP started)

* Modify the resource group R_G_A  /fsA to NFS export and set the option: Filesystems mounted before IP Configured to TRUE.

* smitty hacmp  Extended Resource Configuration  HACMP extended resource group configuration  change show Resources and Attributes for a Resource Group  R_G_A
+ Set Filesystems mounted before IP Configured to true
+ Set Filesystems/Directories to Export (NFSv2/3) to /fsA

* Synchronize the resources  Extended Configuration  Extended Verification and Synchronization

* more /var/hacmp/adm/cluster.log

* # lsnfsexp

* # cat /etc/xtab ( Note /etc/exports is not used by HACMP )
# cat /etc/exports

* Log in on Node_3 as root

* Create a directory for testing the NFS mount
# mkdir /node1
# mount Node_1#:/fsA /node1
( If this fails, check your /etc/hosts file – remember that node3 address must be resolvable in all the /etc/hosts files
# mount
# df –g

Modifying the NFS export Options (override file if you want to use non-root users to write on NFS mounted filesystem)

* on Node_2  #lsnfsexp

* # lsnfsexp > /usr/es/sbin/cluster/etc/exports

* Edit /usr/es/sbin/cluster/etc/exports and add the clients to the list of hosts for /fsA

* Copy /usr/es/sbin/cluster/etc/exports to Node_1

* Restart Cluster Services on Node_1

* Node_3 # touch /node1/file.txt

**** NFS cross-mount within the cluster ****
Nodes in the cluster act as both client and server ; Same name mount points

* On both nodes create a directory /samefs

* On Node_1 edit R_G_A resource group so that /fsA NFS filesystem will be NFS mounted on the /samefs mount point fo all nodes in that resource group

# smitty hacmp  Extended Configuration  Extended Resource Configuration  HACMP Extended Resource Group Configuration  Change/Show Resources and Attributes for a Resource Group  Select R_G_A  Set Filesystems/Directories to NFS mount: /samefs;/fsA

* Synchronize the resources  Extended Configuration  Extended Verification and Synchronization

# mount
# smitty clstop ( Node_1 ; so that Node_2 should have all the resource groups and that NFS mounts are OK)
# clRGinfo
# df -g

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LEARN ABOUT OSX

showmount

SHOWMOUNT(8)						    BSD System Manager's Manual 					      SHOWMOUNT(8)

NAME

     showmount -- show remote NFS mounts on host

SYNOPSIS

     showmount [-Ae36] [-a | -d] [host]

DESCRIPTION

     showmount shows status information about the NFS server on host.  By default it prints the names of all hosts that have NFS file systems
     mounted on the host. See NFS: Network File System Protocol Specification, RFC 1094, Appendix A, and NFS: Network File System Version 3
     Protocol Specification, Appendix I, for a detailed description of the protocol.

     -A      Search for NFS servers advertised via Bonjour.

     -a      List all mount points in the form: host:dirpath

     -d      List directory paths of mount points instead of hosts.

     -e      Show the host's exports list.

     -3      Use mount protocol Version 3, compatible with NFS Version 3.

     -6      Use only IPv6 addresses to contact servers.

SEE ALSO

     mount(1), mountd(8), nfsd(8), mDNSResponder(8)

BUGS

     The mount daemon running on the server only has an idea of the actual mounts, since the NFS server is stateless.  showmount will only display
     the information as accurately as the mount daemon reports it.

HISTORY

     The showmount utility first appeared in 4.4BSD.

4th Berkeley Distribution					September 26, 2010					 4th Berkeley Distribution

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