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| − | [[Category:OPS335]][[Category:OPS335 Labs]] | + | #REDIRECT [[OPS335_Lab_6]] |
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| − | ==FILE SERVER RESOURCES==
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| − | Online References:
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| − | ==OVERVIEW==
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| − | ==INVESTIGATION 1: NETWORK FILE SERVER (NFS)==
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| − | In this lab you'll set up a Fedora VM as an NFS (Network File System) server. Then you'll set up the other VMs as NFS clients that will import their /home directories from this NFS server.
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| − | {{Admon/important|Prerequisites|Before you begin make sure your virtual machines are up to date.<br />
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| − | Ensure all machines are using the firewalls you created in previous labs.<br />
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| − | Ensure both host and VM's have firewalls set up according to prior labs. And ensure you are using your seneca account (the first user created - this will be
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| − | <b>critical</b> for success) }}
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| − | ===Setting up the NFS Server===
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| − | On your VM 2 machine perform the following tasks:
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| − | *You do not need to install nfs, as it is present by default on the server installation of Fedora 22. If it is not there use the following command:
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| − | dnf install nfs-utils
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| − | *edit /etc/exports so that it contains ONLY the following line (where 192.168.x.4 is the IP address of your guest VM):
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| − | /home 192.168.x.4(rw,root_squash,insecure)
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| − | *Start enable your nfs service (now known as nfs-server.service).
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| − | *Build the server's list of exports
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| − | exportfs -r
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| − | *Run and record the output of the following commands:
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| − | exportfs
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| − | showmount -e
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| − | NOTE: You'll have to adjust your firewall on VM2 to get NFS to work. Run netstat to determine the ports needed.
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| − | Read about NFS security [http://tldp.org/HOWTO/NFS-HOWTO/security.html here].
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| − | ===Setting up the NFS Client===
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| − | ====Configuring the NFS client====
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| − | *Ensure the VM guest network is functioning properly. You can use the "host cbc.ca" command to see if DNS queries are being answered.
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| − | *Ensure you have full connectivity to the internet.
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| − | *Again, you should not have to install any NFS software.
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| − | *Add the following line to the bottom of the /etc/fstab file on vm03
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| − | 192.168.x.3:/home /home nfs4 defaults 0 0
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| − | {{Admon/important|Warning:|Do not change any other lines in this file. Do not change any lines in /etc/fstab on your host machine. Doing so can make your machine fail to boot.}}
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| − | *Run the following command to avoid an error that would be caused by logging in while root_squash is active:
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| − | setsebool -P use_nfs_home_dirs 1
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| − | *Logout of vm03 and shut it down.
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| − | ====Testing NFS mounts on your client====
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| − | *Restart vm03 and login using your learnid.
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| − | *Check that the home directory is mounted
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| − | mount | grep /home
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| − | *If it is not, try running 'mount /home' as root and observe any errors.
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| − | *On vm03, create an empty file using the touch command.
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| − | touch empty_file_created_on_vm03
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| − | *Now shutdown vm03.
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| − | *Now on the NFS server, us ls -l in your learnid's home directory to check for the file you just created.
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| − | ===Setting up Automount on the VM===
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| − | On vm03 as root perform the following tasks:
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| − | *Comment or remove the line from /etc/fstab that you entered earlier.
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| − | *With a server installation of Fedora 22, you will not need to install autofs, but on other installations you might need:
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| − | dnf install autofs
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| − | *Move the existing file /etc/auto.master:
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| − | mv /etc/auto.master /etc/auto.master.orig
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| − | *This is a great way to keep a back up in case you need to restore the file in the future. Now create another:
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| − | vi /etc/auto.master
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| − | *Add only the following line:
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| − | /home /etc/auto.home --timeout=60
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| − | *Create the file /etc/auto.home and add ONLY the following line:
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| − | * -fstype=nfs4,rw,nosuid,soft 192.168.x.3:/home/&
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| − | *Start autofs, and ensure the service will automatically start at boot.
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| − | *Log out of vm3 and log back in using your learn account.
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| − | *Open a terminal and enter the command:
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| − | mount | grep home
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| − | *How does it differ from the previous mount?
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| − | *Create another empty file with the name
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| − | touch another_empty_file_from_vm03
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| − | *Run and record the output of the command
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| − | df -hT
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| − | *Back on the nfs server run and record the output of ls -l in your home directory.
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| − | *You should see the files you created on vm03.
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| − | *You may encounter errors with SELinux during the lab (though it has not been a problem recently). It is required that you leave it running. Use the following commands to determine what booleans need to be flipped.
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| − | audit2allow < /var/log/audit/audit.log
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| − | audit2why < /var/log/audit/audit.log
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| − | ===Setting up Automount on the other VM===
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| − | *Now that you have VM3 automatically mounting home directories from VM2, configure VM1 to do the same.
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| − | '''Record steps, commands, and your observations in INVESTIGATION 1 in your OPS335 lab log-book'''
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| − | ==INVESTIGATION 2: SAMBA SERVER==
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| − | ==COMPLETING THE LAB==
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| − | Arrange proof that ...
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| − | ==EXPLORATION QUESTIONS==
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| − | #What does the no_root_squash option for an NFS mount mean?
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| − | #Explain the meaning of the defaults option in an fstab entry. What do the numbers mean at the end?
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| − | #What is the function of the 'exportfs' command?
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| − | #What is the purpose of the 'showmount' command?
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| − | #What is the meaning of the "timeout=60" phrase?
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| − | #What is the meaning of the asterisk (*) in the file /etc/auto.home?
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| − | #What is the meaning of the ampersand (&) in the file /etc/auto.home?
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| − | #What is the role of the /etc/mtab file on the nfs server?
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| − | #What port does nfs-server use?
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