[Linux-cluster] config issuse or bug in 4.u4 for nfs exports

[Pavlos Parissis]

Quoting Pavlos Parissis <p_pavlos at freemail.gr>:

> Hi,
>
> I am building a NFS Active/Passive cluster using ext3 filesystem and I
> don't know if I have a configuration issue or I come across a bug.
>
> My service, nfs1, is started without problems but there is no nfs
> export available.
>
> I went through the list and I found this thread
> http://marc.info/?l=redhat-linux-cluster&m=118764091712577&w=2
>
> I tried to find any evidence of this by looking at bug reports and the
> release notes of 4.5,4.6 and 5.0 but I couldn't find any thing.
>
> Could you please someone give me an idea?

Well I couldn't find why cluster couldn't handle NFS share.
As a result I made a small script for starting/stopping the NFS shares  
and modified my service accordingly.


  <service domain="ThirdDomain" name="nfs1" autostart="1" recovery="relocate">
       <ip monitor_link="1" address="10.10.21.73"/>
       <ip monitor_link="1" address="10.10.21.142"/>
       <fs device="/dev/sdb2" mountpoint="/nfs_omg_data"  
force_unmount="1" name="/nfs_omg_data" fstype="ext3"/>
       <fs device="/dev/sdb3" mountpoint="/nfs_apps" force_unmount="1"  
name="/nfs_apps" fstype="ext3"/>
       <fs device="/dev/sdb4" mountpoint="/nfs_cdr_central"  
force_unmount="1" name="/nfs_cdr_central" fstype="ext3"/>
       <script name="nfs1" file="/usr/local/wsb/scripts/rhc_nfs1"/>
     </service>


ocsi3# cat /usr/local/wsb/scripts/rhc_nfs1
#!/bin/sh
. /opt/ngp/tools/lib/ud_functions
check_daemons()
{
    NFS_DAEMONS="nfsd rpc.mountd rpc.statd"

    for daemon in $NFS_DAEMONS; do
        ps -ef | grep "$daemon" | grep -v grep >/dev/null 2>&1
        if [ $? -ne 0 ]; then
           log "NFS daemon $daemon is not running."
           return 1
        fi
    done

    return 0
}
check_shares()
{
    NFS_SHARES="/nfs_omg_data /nfs_apps /nfs_cdr_central"

    for share in $NFS_SHARES; do
        exportfs|grep "$share" >/dev/null 2>&1
        if [ $? -ne 0 ]; then
           log "$share is not shared."
           return 1
        fi
    done

    return 0
}
check_mounts()
{
   MOUNTS="/nfs_cdr_central /nfs_omg_data  /nfs_apps"

   for mount in $MOUNTS; do
      mount|grep $mount >/dev/null 2>&1
      if [ $? -ne 0 ]; then
         log "$mount file system isn't mounted"
         return 1
      fi
   done

   return 0
}

if [ "$1" = "start" ]; then
    log "Checking for NFS daemons"
    if ! check_daemons; then
       exit 1
    fi

    log "Checking for mounts"
    if ! check_mounts; then
       exit 1
    fi

    log "Starting NFS shares"
    exportfs -o rw 10.10.21.128/26:/nfs_omg_data
    exportfs -o rw 10.10.21.128/26:/nfs_apps
    exportfs -o rw 10.10.21.128/26:/nfs_cdr_central
    exit 0

elif [ "$1" = "stop" ]; then
    log "Stopping the NFS shares"
    exportfs -u 10.10.21.128/26:/nfs_omg_data
    exportfs -u 10.10.21.128/26:/nfs_apps
    exportfs -u 10.10.21.128/26:/nfs_cdr_central
    exit 0

elif [ "$1" = "status" ]; then
    if check_mounts; then
       # Disks mounted go and check daemons
       if ! check_daemons; then
          exit 1
       elif ! check_shares ; then
          exit 1
       fi
    else
       # Disks not mounted
       exit 1
    fi

   exit 0

else
    log "Unknown argument exit nicely"
    exit 0
fi