Difference between revisions of "OPS335 NFS Lab"
(→Part C: Setting up Automount on the VM) |
(→Part C: Setting up Automount on the VM) |
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| Line 60: | Line 60: | ||
*Add only the following line: | *Add only the following line: | ||
/home /etc/auto.home --timeout=60 | /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. | + | * -fstype=nfs,rw,nosuid,soft 192.168.x.1:/home/& |
*Start autofs with the command | *Start autofs with the command | ||
| − | service autofs | + | systemctl start autofs.service |
| − | *Log out of | + | *And ensure the service will start at boot: |
| − | *Log into | + | 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== | ==Completing the Lab== | ||
Revision as of 21:56, 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.
Prerequisites
Before you begin make sure your Fedora 16 host and virtual machines are up to date (yum update).
Ensure both host and VM's have firewalls set up according to prior labs. And ensure you are using your learnid account (the first user created)
Before you begin make sure your Fedora 16 host and virtual machines are up to date (yum update).
Ensure both host and VM's have firewalls set up according to prior labs. And ensure you are using your learnid account (the first user created)
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
- What is your full name and 9 digit Seneca student ID?
- Show the exact output recorded in Part B (df -Th, exportfs, showmount -e and ls -l)
- Show the exact output recorded in Part C. (df -Th, ls -l)
- 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 is the function of the 'exportfs' command?
- What is the purpose of the 'showmount' command?
- What is the meaning of the "timeout=60" phrase in Part C?
- What is the meaning of the asterisk (*) in Part C?
- What is the meaning of the ampersand (&) in Part C?
- What is the role of the /etc/mtab file on the host?
- What port does nfs use?
