Difference between revisions of "OPS335 NFS Lab"
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==Completing the Lab== | ==Completing the Lab== | ||
− | Answer the following questions | + | Answer the following questions in your log book: |
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− | |||
#Explain in your own words the meaning of the no_root_squash option for an NFS mount. | #Explain in your own words the meaning of the no_root_squash option for an NFS mount. | ||
− | #Explain the meaning of the defaults option to the mount command. | + | #Explain the meaning of the defaults option to the mount command. What do the numbers mean at the end? |
#What is the function of the 'exportfs' command? | #What is the function of the 'exportfs' command? | ||
#What is the purpose of the 'showmount' command? | #What is the purpose of the 'showmount' command? | ||
− | #What is the meaning of the "timeout=60" phrase | + | #What is the meaning of the "timeout=60" phrase: |
− | #What is the meaning of the asterisk (*) | + | #What is the meaning of the asterisk (*)? |
− | #What is the meaning of the ampersand (&) | + | #What is the meaning of the ampersand (&)? |
#What is the role of the /etc/mtab file on the host? | #What is the role of the /etc/mtab file on the host? | ||
− | #What port | + | #What port did you have to open? |
+ | #What do the idmapd daemon provide? |
Revision as of 21:58, 10 March 2012
Contents
NFS and Automount
In this lab you'll set up a Fedora 16 host as an NFS (Network File System) server. Then you'll set up a Fedora 16 guest VM (Virtual Machine) that will import its /home directory from this host.
Part A: Setting up the Guest VM
- Ensure the VM guest network is functioning properly. You can use the "host cbc.ca" command to see if DNS queries are being answered.
- Ensure you have full connectivity to the internet.
- Be sure to set the firewall on both your VM and host according to prior labs. Use the command iptables-save to verify.
- Once your VM guest network is working use the ifconfig command and record the IP adddress of your VM guest. The address should be something like 192.168.122.yyy.
- Install the NFS software on both vm03 and your host using the command "yum install nfs-utils".
- Add the following line to the bottom of the /etc/fstab file on vm03
192.168.x.1:/home /home nfs defaults 0 0
- Edit the file /etc/idmapd.conf and uncomment and change the following lines:
Verbosity = 3 Domain = <learn-id>.org
- Restart the nfs-idmap daemon.
systemctl restart nfs-idmap.service
- Check /var/log/messages for output when troubleshooting.
- Logout of vm03 and shut it down.
Part B: Setting up the NFS Server on the Host
On your Fedora host machine perform the following tasks:
- edit /etc/exports so that it contains ONLY the following line (where 192.168.x.4 is the IP address of your guest VM):
/home 192.168.x.4(rw,root_squash,insecure)
- Edit the file /etc/idmapd.conf and uncomment and change the following lines:
Verbosity = 3 Domain = <learn-id>.org
- Restart the nfs-idmap daemon.
systemctl restart nfs-idmap.service
- Start your nfs server with the command:
systemctl start nfs-server.service
NOTE: You'll have to adjust your firewall on the host to get NFS to work. Run netstat to determine the ports needed.
Testing NFS mounts on your VM
- Start up vm03 and login using your learnid.
- On your host PC run and record the output of the following commands:
exportfs
showmount -e
- Now on vm03
mount | grep /home
- On vm03, create an empty file using the touch command.
touch empty_file_created_on_vm03
- Now shutdown vm03.
- Now on your host PC, run the following command:
ls -l
- Shutdown the nfs server with the command
systemctl stop nfs-server.service
Part C: Setting up Automount on the VM
On vm03 as root performt he following tasks:
- Comment or remove the line from /etc/fstab that you entered earlier.
- Install automount
yum install autofs
- Move the existing file /etc/auto.master:
mv /etc/auto.master /etc/auto.master.orig
- This is a great way to keep a back up in case you need to restore the file in the future. Now create another:
vi /etc/auto.master
- Add only the following line:
/home /etc/auto.home --timeout=60
- Create the file /etc/auto.home and add ONLY the following line:
* -fstype=nfs,rw,nosuid,soft 192.168.x.1:/home/&
- Start autofs with the command
systemctl start autofs.service
- And ensure the service will start at boot:
systemctl enable autofs.service
- Log out of vm03 and back on the host start the nfs server.
- Log into vm03 using your learn account.
- Create another empty file with the name
touch another_empty_file_from_vm03
- Run and record the output of the "df -Th" command.
- Back on the host run and record the output of:
ls -l
Completing the Lab
Answer the following questions in your log book:
- Explain in your own words the meaning of the no_root_squash option for an NFS mount.
- Explain the meaning of the defaults option to the mount command. What do the numbers mean at the end?
- What is the function of the 'exportfs' command?
- What is the purpose of the 'showmount' command?
- What is the meaning of the "timeout=60" phrase:
- What is the meaning of the asterisk (*)?
- What is the meaning of the ampersand (&)?
- What is the role of the /etc/mtab file on the host?
- What port did you have to open?
- What do the idmapd daemon provide?