NFS Sharing Service

 

Tutorial 01: NFS Sharing Service

 

 

. Lab Objectives

 

Rhel5.9 _ A: 192.168.10.253/24

Rhel5.9 _ B: 192.168.10.200/24

1. Share/root with 192.168.10.200, which can be written or synchronized, and allow the client to access it as root

2. Share/usr/src to the 192.168.10.200/24 CIDR Block, writable and asynchronous

3. Based on the previous experiment, all user identities on the client are mapped to nfsnobody.

4. automatically mount the/root directory shared by the NFS server to the local/data/root directory at the client startup.

Mount the/usr/src directory shared by the NFS server to the local/data/src directory on the client.

 

. Experiment steps

 

1. writable. Synchronization

 

(1) NTFS server operations

 

1. Prepare the software package and directory.

[[Email protected] ~] # Rpm-Q nfs-utils Portmap

Nfs-utils-1.0.9-66.el5

Portmap-4.0-65.2.2.1

[[Email protected] ~] # Mkdir/Ptest // create a shared test directory

[[Email protected] ~] # Echo "Welcome to NFS Station">/Ptest/nfs.txt

// Create a test file

[[Email protected] ~] # Ls-LD/Ptest // check the default directory permissions

Drwxr-XR-x 2 root Root 4096 09-12/Ptest/

 

2. Configure/etc/exports shared files and modify permissions

[[Email protected] ~] # Vim/etc/exports

/Boot 192.168.10.200 (RW, sync, no_root_squash)

3. Start the Portmap service

[[Email protected] ~] # Service Portmap restart

Stop Portmap: [OK]

Start Portmap: [OK]

[[Email protected] ~] # Chkconfig Portmap on // set Portmap to start automatically

 

4. Start the NFS service

[[Email protected] ~] # Service NFS restart // Ensure NFS is enabled

Disable NFS mountd: [failed]

Disable NFS mountd: [OK]

Disable the NFS daemon: [OK]

Disable NFS quotas: [OK]

Disable NFS: [OK]

Start the NFS service: [OK]

Disable NFS quota: [OK]

Start the NFS daemon: [OK]

Start NFS mountd: [OK]

Stopping RPC idmapd: [OK]

Starting RPC idmapd: [OK]

[[Email protected] ~] # Chkconfig Portmap on // set Portmap to start automatically

[[Email protected] ~] # Chkconfig NFS on // sets NFS auto-start

[[Email protected] ~] # Service Portmap restart

[[Email protected] ~] # Chkconfig network on // set Portmap to start automatically

 

(2) NFS client operations

 

1. Start Portmap

[[Email protected] ~] # Service Portmap restart

Stop Portmap: [OK]

Start Portmap: [OK]

 

2. view the NFS shared resource list of the server

[[Email protected] ~] # Showmount-e 192.168.10.253

Export list for 192.168.10.253:

/Boot 192.168.10.200

 

3. Check the NFS service status of the target server

[[Email protected] ~] # Rpcinfo-P 192.168.10.200 // program version protocol port

100000 2 TCP 111 Portmapper

100000 2 UDP 111 Portmapper

100024 1 udp 635 status

100024 1 tcp 638 status

 

4. Mount the shared file from the client 192.168.10.200 to/boot

[[Email protected] ~] # Mkdir-P/data/root // create a file

[[Email protected] ~] # Mount 192.168.10.253:/boot // data/root/

[[Email protected] ~] # DF-HT // check the mounting result

File System Type capacity available in use % mount point

/Dev/sda2 ext3 19 GB 11g 7.2g 61%/

/Dev/sda1 ext3 99 m 12 m 82 m 13%/boot

Tmpfs 500 M 0 500 m 0%/dev/SHM

/Dev/HDC iso9660 4.1g 4.1g 0 100%/Media/rhel_5.9 x86_64 DVD

192.168.10.253:/boot/

NFS 99 m 12 Mb 82 m 13%/data/root

5. Test read/write permissions

[[Email protected] root] # Touch file.txt

[[Email protected] root] # ls-l file.txt

-RW-r -- 1 Root 0 09-13 23:54 file.txt

 

Ii. writable. asynchronous

 

(1) server operations

 

1. Configure/etc/exports shared files and modify permissions

[[Email protected] ~] # Vim/etc/exports

/Boot 192.168.10.200 (RW, sync, no_root_squash)

/Usr/src 192.168.10.0/24 (RW, async)

 

2. Output shared files

[[Email protected] ~] # Exportfs-RV

Exporting 192.168.10.0/24:/usr/src

Exporting 192.168.10.200:/boot

 

3. All client permissions are downgraded to nfsnobody.

[[Email protected] ~] # Setfacl-m u: nfsnobody: rwx/usr/src/

 

(2) client operations

 

1. view the NFS shared resource list of the server

[[Email protected] ~] # Mkdir/data/src/

[[Email protected] ~] # Showmount-e 192.168.10.253

Export list for 192.168.10.253:

/Boot 192.168.10.200

/Usr/src 192.168.10.0/24

 

2. Mount shared files from the client

[[Email protected] ~] # Mount 192.168.10.253:/usr/src // data/src/

 

3. Test read/write permissions

[[Email protected] ~] # Cd/data/src/

[[Email protected] SRC] # Touch filel.txt

[[Email protected] SRC] # ls-l filel.txt

-RW-r -- 1 nfsnobody 0 09-14 00:36 filel.txt

Iii. ing

 

(1) Client Configuration

 

1. Add folder Permissions

[[Email protected] ~] # Chmod o + w/usr/src/

 

2. Modify the NFS master configuration file

[[Email protected] ~] # Vim/etc/exports

/Boot 192.168.10.200 (RW, sync, no_root_squash)

/Usr/src 192.168.10.0/24 (RW, async, all_squash)

 

3. View

[[Email protected] ~] # Exportfs-RV

Exporting 192.168.10.0/24:/usr/src

Exporting 192.168.10.200:/boot

 

(2) NFS client operations

 

1. check folder Permissions

[[Email protected] ~] # Useradd Tom

[[Email protected] ~] # Su-Tom

[[Email protected] ~] $ CD/data/src/

[[Email protected] SRC] $ touch toml.txt

[[Email protected] SRC] $ LS-l toml.txt

-RW-r -- 1 Tom 0 09-14 toml.txt

 

2. Test read/write permissions

[[Email protected] SRC] $ touch tom2.txt

[[Email protected] SRC] $ LS-l tom2.txt

-RW-r -- 1 nfsnobody 0 09-14 00:56 tom2.txt

 

4. automatic mounting and trigger mounting at startup

 

(1) automatically mount nfs shared resources on the client

1. Add NFS mounting settings

[[Email protected] ~] # Vim/etc/fstab

192.168.10.253:/root/data/root NFS ults, _ netdev 0 0

 

2. view the mounting result

[[Email protected] ~] # Grep/data/root/etc/fstab

192.168.10.253:/root/data/root NFS ults, _ netdev 0 0

 

3. automatically mount the main directory

[[Email protected] ~] # Vim/etc/auto. Master

/Mnt/etc/auto. Data

[[Email protected] ~] # Grep MNT/etc/auto. Master

/Mnt/etc/auto. Data

 

4. Start the service

[[Email protected] ~] # Service autofs restart

Start automount: [OK]

[[Email protected] ~] # Chkconfig autofs on

 

(2) triggering mounting NFS shared resources on the client

 

1. Add automatic mounting NFS settings

[[Email protected] ~] # Vim/etc/auto. Data

Src-fstype = NFS, RW 192.168.10.253:/usr/src

[[Email protected] ~] # Cat/etc/auto. Data

Src-fstype = NFS, RW 192.168.10.253:/usr/src

 

2. Start the service

[[Email protected] ~] # Service autofs restart

Start automount: [OK]

[[Email protected] ~] # Chkconfig autofs on

 

. Problem and Experience Summary

 

Fault description: Mount fails, and the target host cannot be reached

[[Email protected] ~] # Mount 192.168.10.253:/root/data/root/

Mount: 192.168.10.253:/root/failed, reason given by server:

Permission denied

 

Solution: Directory error/root/-/boot/

[[Email protected] ~] # Mount 192.168.10.253:/boot // data/root/

Mount: 192.168.10.253:/root/failed, reason given by server: Permission denied

 

Solution: Directory Permissions

[[Email protected] ~] # Chmod 755/boot

 

This article is from the "9255610" blog, please be sure to keep this source http://9265610.blog.51cto.com/9255610/1552668

NFS Sharing Service