cluster:Nfs/3/client

From Dgiref

Please open a NGI-DE ticket if you experience any Installation or Configuration problem.

NFS client v.3

Prepare

NFS shares are mounted on the client side using the mount command. The format of the command is as follows:

mount -t <nfs-type> -o <options> <nfs_server_host>:</remote/export> </local/directory>

where <nfs-type> one from {nfs, nfs4}, <options> - a comma separated list of options for the NFS file system (refer to Common NFS Mount Options for details). Reference installation use the singe mount point, hence </remote/export> and </local/directory> are /srv/nfs.

Firewall configuration

configure TCP port 2049 (how to open port in firewall).

administrator's script: prepare.sh

```
 
```
```
#!/bin/bash
```
```
# prepare
```
```
# execute as root
```
```
# echo `su -`
```
```
 
```

# Declare the variables section ------------

# Please insert your actual configuration

# NFS_PORT="Communication port for nfs service"

```
# NFS_SERVER="adress for nfs server"
```

# NFS_SERVER_DIR="export directory on nfs server"

# NFS_MOUNT_DIR="mount directory on nfs client"

# from here ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

```
NFS_PORT="2049"
```
```
NFS_SERVER="dgiref-ifs1.fzk.de"
```
```
NFS_SERVER_DIR="/srv/nfs"
```
```
NFS_MOUNT_DIR="/srv/nfs"
```

# till here ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Install

The Linux operating system offers two methods for mounting remote file systems:

manually, with mount service (using a /etc/fstab configuration file)
automatically at boot time with the autofs service (using a main configuration file /etc/auto.master and set of auto.* files)

The reference installation use the first, manual method, hence the mount service should be installed. Probably, the operating system has nfs service installed. To be sure, the following packages can be additionally installed:

nfs-utils
portmap
quota

administrator's script: install.sh

```
 
```
```
#!/bin/bash
```
```
# install nfs client
```
```
# execute as root
```
```
# echo `su -`
```
```
#-> start routine
```
```
yum -y install mount
```
```
#<- end routine
```

Configure

With the daemons portmap, lockd, statd, mountd running NFS client should be able to mount the remote directory /srv/nfs and after creates the soft links to the mounted /srv/nfs subdirectories.

administrator's script: configure.sh

```
 
```
```
#!/bin/sh
```
```
# configure the nfs client
```
```
# load parameters from prepare section
```
```
cd `dirname $0`
```
```
source prepare.sh
```
```
 
```
```
#-> start routine
```
```
# execute as root: 
```
```
# su -
```
```
# check if the mount directory exists:
```

[ -d "${NFS_MOUNT_DIR}" ] && echo "Directory ${NFS_MOUNT_DIR} exists" || echo `mkdir -p ${NFS_MOUNT_DIR}`

```
 
```

# If the mount command works add the mounting at the start-up editing the file /etc/fstab:

echo "${NFS_SERVER}:${NFS_SERVER_DIR} ${NFS_MOUNT_DIR}  nfs nfsvers=3,bg,hard,intr,nosuid,rsize=32768,wsize=32768,rw  0 0" >> /etc/fstab

```
mount -a
```
```
#<- end routine
```

Proceed

To communicate with an NFS server, the portmap service must be running. To verify that portmap is active, type the following command as root:

service portmap status

If the portmap service status is running, then
- the nfs service can be started with:service nfs start
- the nfslock service can be started with:service nfslock start
- the mount service can be started with:service nfslock start.
Else execute: service portmap start and after successful report,
- the nfs service can be started with:service nfs start
- the nfslock service can be started with:service nfslock start
- the mount service can be started with:service nfslock start.

By default, the nfs service does not start automatically at boot time. To configure the NFS to start up at boot time, use an initscript utility, such as /sbin/chkconfig, /sbin/ntsysv, or the Services Configuration Tool program.

administrator's script: proceed.sh

```
 
```
```
#!/bin/bash
```
```
# proceed
```
```
#-> start routine
```
```
# Start the services:
```
```
/etc/init.d/portmap start 
```
```
/etc/init.d/nfs start 
```
```
/etc/init.d/nfslock start 
```

# and add them to the start configuration with:

```
chkconfig --level 35 portmap on 
```
```
chkconfig --level 35 nfs on 
```
```
chkconfig --level 35 nfslock on 
```

# If the services are not present in the level management add them with "--add" chkconfig option.

```
#<-end routine
```

Initial test

Lists the contents of the mounted directory with ls command.

WARNING: 
Possible troubles with mount
Problem 1
mount: sn05:/var/spool/pbs/server_logs failed, reason given by server: Permission denied
Possible solution: Check iptables and /etc/hosts.allow; /etc/hosts.deny
Problem 2
mount clntudp_create: RPC: Program not registered
Possible solution: chmod 644 /etc/hosts.allow

administrator's script: test.sh

```
 
```
```
#!/bin/bash
```
```
# test
```
```
# load parameters from prepare section
```
```
source prepare.sh
```
```
 
```
```
#-> start routine
```
```
ls ${NFS_MOUNT_DIR}
```
```
#check the port state
```

echo `netstat -anp | grep "${NFS_PORT}"`

```
#<- end routine
```

Update

Use the operating system package managers to implement updates, upgrades and to delete a package. Specifically for the nfs updates and patches, refer into the following online resource: http://www.linux-nfs.org/

administrator's script: update.sh

```
 
```
```
#!/bin/bash
```
```
# update
```
```
#-> start routine
```
```
su -c 'yum update nfs-utils'
```
```
#<- end routine
```

cluster:Nfs/3/client

Contents

NFS client v.3

Prepare

Install

Configure

Proceed

Initial test

Update

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