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*Centos 7 Full Installation DVD.
*One Solid State Drive (SSD), mininmum capacity: 240 GB (USB 3.0). It is strongly advised you dedicate a drive for this course only.
=== Online Resources===
# It may be advisable to obtain the <u>latest version</u> of the CentOS 7 Full Installation DVD since there may be improvements since the last version from when you took OPS235.<br><br>
# Download and burn on a DVD a copy of the CentOS 7 installation DVD (64 bit edition) from the CentOS web site or the Belmont server.<br>'''Note:''' we'll be using the 64 bit version of CentOS because all of our lab computers are equipped with Intel 64 bit mainboards and CPUs, and any computer you bought in the last few years for yourself will be 64bit as well.<br><br>
#* '''Seneca's mirror of CentOS:''' https://mirror.senecacollege.ca/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-20032009.iso <br>This is very fast, but is only accessible from within Seneca's network - you can't access this from home. You can burn this disc on the machines in the Open Lab.)<br><br>#* '''Outside Seneca College link (available from any Internet connection):<br>''' httphttps://mirror.csclub.uwaterloonetflash.canet/centos/7.9.2009/isos/x86_64/CentOS-7-x86_64-DVD-20032009.iso<br /><br># You need to refer to your OPS235 notes in order to install your host machine.<br>Here is a direct link:<br> [https://wiki.cdot.senecacollege.ca/wiki/OPS235_Lab_1_-_CentOS7_-_SSD2 OPS235 OPS245_Lab_1 OPS245 - Lab1] {{Admon/tip |Boot order|Some of our machines' boot order is configured to be Harddrive first, DVD second. Which means you won't be able to boot from the DVD if you already have an operating system installed on your drive.}}
<ol>
<li value=4>Customize your installation following these guidelines:
<li>Free up at least '''100GB''' of disk space by shrinking the '''/home''' partition (At least '''40 GB''' for root (/) and '''40GB''' for /home). Since your machine will have far fewer users and more virtual machines than a typical installation, we will need that space elsewhere.
<li>Create a new logical volume for '''/var/lib/libvirt/images''' and give it the space made available by shrinking /home (You will need enough space for up to 10 virtual machines at 8GB each plus room to compress/extract images).
<li>Make certain that the existing partitions '''except SWAP swap, /boot and EFI/boot/efi''' have the file system type '''ext4''' (not xfs).
</ul>
</ul>
At this point you have a basic Centos system installed and updated. This will serve as a host for the virtual machines where you will do the majority of the work in this course. All the rest of our labs will assume you have this basic system running. If, for any reason, your system becomes corrupted during the semester, you'll have to redo this lab to be able to continue with the remaining uncompleted labs. You are responsible for YOUR system. If you do not perform back-ups you have taken this risk on yourself. Poor planning on your part does not constitute an emergency for anyone else.
'''Record steps, commands, and your observations in INVESTIGATION 1 in your OPS335 OPS235 lab log-book'''
==INVESTIGATION 2: VIRTUAL MACHINE INSTALLATION==
===Configuring a VM host===
# You will need to install some software to allow your machine to act as a host for virtual machines. We'll be using the same '''libvirt''' and '''virt-manager''' you used in [https://wiki.cdot.senecacollege.ca/wiki/OPS235_Lab_2 OPS235- Lab2].<br>You may find it helpful to refer back to the '''OPS235 notes''' to perform the following operations:
#* Install the required virtualization software
#* Start and enable the virtualization service
#* Stop and delete the '''default''' network.
#* Use the '''plus sign''' to add a new virtual network using the following options:
#:* Name your virtual network '''ops335ops235'''
#:* Use the '''last two digits of your student number for the third octet of network IP address''' (for example, if your student number is 000-000-0<b>90</b>, the network address would be 192.168.<b>90</b>.0/24.
#:* Ensure the DHCP range will allow you to assign '''at least 10 static IP addresses outside it''' (note: leave the low numbers available for static addresses).
<ol><li value="4">Use the information from the '''ip address show''' command to correctly specify the '''physical network interface''' and the '''virtual network interface'''.</li></ol>
'''NOTE:''' You will need an ISO file for CentOS 7 (the same one you burned your DVD from). It is recommended to use the command to download this image onto your host machine. In this way, you can keep it on your host machine for the remainder of this course in case you need it:
'''NOTE:''' You will need an ISO file for CentOS 7 (the same one you burned your DVD from). It is recommended to use the command:<br> '''<span style="text-decoration:none;color:blue;">wget httpshttp://mirror.senecacollegecsclub.uwaterloo.ca/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-20032009.iso</span>'''<br>to download this image onto your host machine. In this way, you can keep it on your host machine for the remainder of this course in case you need it.
Perform the following steps to create your first VM on your Virtual Machine Manager application:
#You will notice that the server installation defaults to a command-line interface. This is normal, and we will only be using this interface during this course.
#Ensure your machine has a network connection by running the command
'''ssh your_seneca_id@matrix.senecac.onsenecacollege.ca'''<ol><li value="3">If that did not work - make sure GlobalProtect VPN is installed on your Windows/Mac and connected. If it is, ensure your CentOS network interface is started automatically on boot.</li></ol>
{{Admon/tip|Default for network config for onboot|If you've turned on your networking interface during installation - it will be turned on by default. If you've left the network interface off during the installation - it will be off by default.}}
<ol><li value="4">Once you have a working connection - update your machine.</li></ol>
<li>Reboot the virtual machine once it is updated.</li>
</ol>
===Cloning a Virtual Machine===
<ol>
<li value="2"> Now that you have one virtual machine working, you will create two more. If you struggled with the previous steps, repeat them to create two more virtual machines.</li><li>'''If you are confident with what you have done so far, you may clone your existing machine to create the others by performing the following steps:'''</li><li><ol type="a"> <li>Make certain that your '''vm1''' virtual machine is shutdown.</li> <li>For your '''vm1''' machine, go to the details section and remove the <u>device</u> '''Channel qemu-ga'''.</li> <li>In the virtual machine manager, '''right click''' on ''vm1'' and select '''Clone...'''.</li> <li>Set the Name to be: '''vm2'''</li></ol></li><li>Once successfully created, boot the new VM and correct the host name. This can be done using the '''hostnamectl''' command-line tool.</li></ol> {{Admon/important |Errors When Booting Clone|If you experience errors when starting the "Cloned" VM, go to the clone's details section (i.e. when you open the VM, but not start it, then select: ''View'' then ''Details'') and remove the <u>device</u> '''Channel qemu-ga'''.<br>It is recommended to follow that procedure, since if you don't, you would only be permitted to start the "cloned VM" if the original VM (used to create the clone) is already running.<br><br>'''Repeat this procedure for any additional "cloned VM" that you create for this course'''.}} <ol><li value="4">Record in your notes the steps for cloning a vm.</li>
<li>Use the host command to check for connectivity</li>
<li>After creating '''vm2 ''' repeat the above steps to create '''vm3 ''' and correct the host namehostname ('''vm2.localdomain''' and '''vm3.localdomain''' respectively).</li>
</ol>
Upon completion of this lab you should have 4 installed machines. One machine running Centos 7 and acting as a host and gateway for three virtual machines running minimal installations of Centos 7. Each machine must be fully updated and have access to the network (for example, to get further updates) and be able ping the others. Each machine must be using iptables for the firewall.
Follow the instructions for lab 0 on blackboard.
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===Andrew's sections===
::<span style="color:green;font-size:1.5em;">✓</span> Lab logbook completed
::<span style="color:green;font-size:1.5em;">✓</span> Run the '''labcheck_install.sh''' shell script on your host machine
-->
==EXPLORATION QUESTIONS==
