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=== Installation instructions for CentOS 7 ===
# 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 OPS235OSL740.<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-2009.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>''' https://mirror.netflash.net/centos/7.9.2009/isos/x86_64/CentOS-7-x86_64-DVD-2009.iso<br /><br>
# You need to refer to your OPS235 OSL740 notes in order to install your host machine.<br>Here is a direct link:<br> [https://wiki.cdot.senecacollege.ca/wiki/OPS245_Lab_1 OPS245 OSL740_Lab_1 OSL740 - Lab1]
<ol>
<li value=4>Customize your installation following these guidelines:
<li>'''Turn on networking''' and use '''host''' as the '''hostname'''.
<li>Under software selection, choose '''Gnome desktop'''.
<li>The partition setup is similar to what you had in OPS235OSL740:
<ul>
<li>Delete any old partitions.
<ol><li value="2">Log in and check that you have access to the internet. If you don't - you need to get the network interface to come up on boot. Edit the appropriate config file and configure your main network interface to come up at boot.<ul><li>You can then use the '''ifup'''/'''ifdown''' commands to reset your network configuration or you can just reboot.</li></ul></li><li>Make certain that '''SELinux''' is '''enforcing''' for security reasons (this should be the default). To make it ''enforcing'', simply edit the '''/etc/selinux/config''' file and follow the instructions inside.
{{Admon/important |SELinux in Andrew's sections|If you're in one of Andrew's sections - please disable SELinux (i.e. do the opposite of the bullet above). This will give you some extra freedom in the rest of the course to learn and experiment without being bogged down by inexplicable permission denied errors.}}
</li><li>Install all updates using the '''yum update''' command.</li></ol>
<br>
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 OPS235 OSL840 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 OSL740_Lab_2 OSL740 - Lab2].<br>You may find it helpful to refer back to the '''OPS235 OSL740 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 '''ops235osl840'''
#:* 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).
#Open a separate terminal and issue the '''ip address show''' command on your host machine to know your physical network and your virtual network. Note this information for the next few steps.
#Issue the following command to download Bash shell script to check your host machine's set-up prior to proceeding with this lab:<br>'''wget http://ict.senecacollege.ca/~andrewazzad.smithkara/ops335osl840/labcheck_install.sh'''<br>
#Assign execute permissions, and run the script to check your work:<br>
'''labcheck_install.sh'''
# Create a new virtual machine named '''vm1'''.
# Accept the default file type (which is '''qcow2'''). You are <u>NOT</u> required to specify the VM file pathname as you did in OPS235OSL740.
{{Admon/tip|VM File Types ( '''.qcow2''' vs '''.img''' )|In OPS235OSL740, you selected the VM images as a '''"raw"''' image. In OPS335OSL840, you will be accepting the default image file '''".qcow2"''' (which stands for "QMENU Copy on Write version 2" ) that provides more features when manipulating stored VM images.}}
<ol><li value="3">Since you will be installing a Linux <u>server</u> (as opposed to a Gnome Desktop workstation), you can '''use the <u>default</u> memory and CPU options for use with lab computers'''.</li><li>Set the disk image size set to '''8GB'''<br><br>Note: Since you already setup your virtual network to OPS335OSL840, your VM will be automatically connected to your new ops335 ols840 virtual network.<br><br></li><li>Note the following installation steps when you install your created VM:</li></ol>
::* Select the correct ''location / Time Zone''.
</ol>
{{Admon/important |Backup your VMs!|You MUST backup ALL of your VMs whenever you complete your '''OPS335 OSL840 labs''' or when working on your '''OPS335 OSL840 assignments.''':<br>[ [https://wiki.cdot.senecacollege.ca/wiki/OPS235_Lab_2_-_CentOS7_-_HD2#Part_1:_Backing_Up_Virtual_Machines Backing up Your Virtual Machines] ]. Refer to OPS235 lab2 notes on how to backup your VMs. You should backup your VMs to a USB key in case something happens to your host machine. Note: VM files contained in the '''/var/lib/libvirt/images''' directory have the extension in '''.qcow2''' and instead of '''.img''' (eg. for OPS235 courses prior to Fall 2016.}}
'''Record steps, commands, and your observations in INVESTIGATION 2 in your OPS335 OSL840 lab log-book'''
==COMPLETING THE LAB ==
