#REDIRECT [[Category:OPS335]][[Category:OPS335 Labs]OPS335_Lab_6] ==FILE SERVER RESOURCES==  Online References:  **  ==OVERVIEW== x  ==INVESTIGATION 1: NETWORK FILE SERVER (NFS)== 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.{{Admon/important|Prerequisites|Before you begin make sure your virtual machines are up to date.<br />Ensure all machines are using the firewalls you created in previous labs.<br />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<b>critical</b> for success) }} ===Setting up the NFS Server===On your VM 2 machine perform the following tasks:*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: dnf install nfs-utils*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) *Start enable your nfs service (now known as nfs-server.service).*Build the server's list of exports exportfs -r *Run and record the output of the following commands: exportfs showmount -e NOTE: You'll have to adjust your firewall on VM2 to get NFS to work. Run netstat to determine the ports needed. Read about NFS security [http://tldp.org/HOWTO/NFS-HOWTO/security.html here]. ===Setting up the NFS Client=======Configuring the NFS client====*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.*Again, you should not have to install any NFS software.*Add the following line to the bottom of the /etc/fstab file on vm03 192.168.x.3:/home /home nfs4 defaults 0 0{{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.}}*Run the following command to avoid an error that would be caused by logging in while root_squash is active: setsebool -P use_nfs_home_dirs 1*Logout of vm03 and shut it down. ====Testing NFS mounts on your client====*Restart vm03 and login using your learnid. *Check that the home directory is mounted mount | grep /home*If it is not, try running 'mount /home' as root and observe any errors.*On vm03, create an empty file using the touch command. touch empty_file_created_on_vm03*Now shutdown vm03.*Now on the NFS server, us ls -l in your learnid's home directory to check for the file you just created. ===Setting up Automount on the VM===On vm03 as root perform the following tasks:*Comment or remove the line from /etc/fstab that you entered earlier.*With a server installation of Fedora 22, you will not need to install autofs, but on other installations you might need: dnf 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=nfs4,rw,nosuid,soft 192.168.x.3:/home/&*Start autofs, and ensure the service will automatically start at boot. *Log out of vm3 and log back in using your learn account.*Open a terminal and enter the command: mount | grep home*How does it differ from the previous mount?*Create another empty file with the name touch another_empty_file_from_vm03*Run and record the output of the command df -hT*Back on the nfs server run and record the output of ls -l in your home directory.*You should see the files you created on vm03.*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. audit2allow < /var/log/audit/audit.log audit2why < /var/log/audit/audit.log ===Setting up Automount on the other VM===*Now that you have VM3 automatically mounting home directories from VM2, configure VM1 to do the same.  '''Record steps, commands, and your observations in INVESTIGATION 1 in your OPS335 lab log-book'''  ==INVESTIGATION 2: SAMBA SERVER==   ==COMPLETING THE LAB== Arrange proof that ...    ==EXPLORATION QUESTIONS== #What does the no_root_squash option for an NFS mount mean?#Explain the meaning of the defaults option in an fstab entry. 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 (*) in the file /etc/auto.home?#What is the meaning of the ampersand (&) in the file /etc/auto.home?#What is the role of the /etc/mtab file on the nfs server?#What port does nfs-server use?