Changes

In this is lab, you will install your '''host machine''' (Centos7), '''install virtualization software''', and '''create and install 3 nested virtual machines'''.

*One SATA hard disk in a removable drive tray Solid State Drive (minimum 250GBSSD), mininmum capacity: 240 GB (USB 3.0). It is strongly advised you dedicate a drive for this course only.*USB drive (8 GB+) for creating and storing backups (Virtual Machines, configuration files).*OPS335 Lab Log-book (Previous OPS235 log lab-book as an additional resource).

=== Installation instructions for Centos CentOS 7 ===# It may be advisable to obtain a the <u>newer latest version</u> of the Centos CentOS 7 Full Installation DVD since there may be improvements since the last version from when you took OPS235.# '''Note:''' There are two versions of OPS235 lab1 if you are using for reference for either a SATA removable hard drive or a Solid State Drive (SSD). Both labs are identical in basic content, except the SSD labs uses VMware Workstation 12 Pro to create the host machine. For an SSD drive, you would also need to setup nested VMs when you setup KVM in lab2 (i.e. follow instructions in OPS235 labs CAREFULLY).<br><br># Download and burn on a DVD a copy of the Centos CentOS 7 installation DVD (64 bit edition) from the Centos CentOS web site or the Belmont server.<br>'''Note:''' we'll be using the 64 bit version of Centos CentOS because all of our lab computers are equiped 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 CentosCentOS:''' httphttps://belmontmirror.senecacollege.ca/pub/centos/7.2.1511/isos/x86_64/CentOS-7-x86_64-DVD-15112009.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://archivemirror.kernelnetflash.orgnet/centos-vault/7.29.15112009/isos/x86_64/CentOS-7-x86_64-DVD-15112009.iso<br /><br># Insert You need to refer to your OPS235 notes in order to install your removable harddrive into the host machine and boot from the DVD.{{Admon<br>Here is a direct link:<br> [https://tip |Boot order|Some of our machines' boot order is configured to be Harddrive first, DVD secondwiki.cdot. Which means you won't be able to boot from the DVD if you already have an operating system installed on your drivesenecacollege.}}ca/wiki/OPS245_Lab_1 OPS245 - Lab1]

<li value=54>Customize your installation following these guidelines:

<li>Click the link to '''create them (partitions ) automatically''' (this will give a typical layout with /, /boot, /boot/efi, /home, etc).<li>Free up at least '''100GB''' of disk space by shrinking the '''/home''' partition (At least '''40GB''' GB for root (/) and '''40GB'''GB 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>Make certain that the existing partitions '''except swap, /boot and /boot/efi''' have the file system type '''ext4''' (not xfs).

# In the current version of CentOS the first time you boot your system a graphical licence prompt comes up. To save you some stress, here are the keys you need to press to get past it::: '''1''' ''ENTER'':: '''2''' ''ENTER'':: '''c''' ''ENTER'':: '''c''' ''ENTER''<br><br><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 '''/etc/sysconfig/the appropriate config file and configure your main network-scripts/ifcfg-eno1''' (the name of the interface may be different) and change '''onboot''' to '''yes'''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>

<source lang="bash">

<source lang="bash">

'''Record steps, commands, and your observations in INVESTIGATION 1 in your OPS335 OPS235 lab log-book''' 

# 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:

#:* Name your virtual network '''ops335ops235'''

#Open a separate terminal and issue the '''ifconfigip 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://matrixict.senecac.onsenecacollege.ca/~murrayandrew.saulsmith/ops335/labcheck_install.sh'''<br>

<ol><li value="4">Use the information from the '''ifconfigip 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:<br> '''<span style="text-decoration:none;color:blue;">wget http://belmont.senecacollege.ca/pub/centos/7.2.1511/isos/x86_64/CentOS-7-x86_64-DVD-1511.iso</span>''' to download this image onto your host machine.<br>In this way, you can keep it on your host machine for the remainder of this course in case you need it.:

# Accept the default file type (which is '''qcowqcow2'''). You are <u>NOT</u> required to specify the VM file pathname as you did in OPS235.

{{Admon/tip|VM File Types ( '''.qcowqcow2''' vs '''.img''' )|In OPS235, you selected the VM images as a '''"raw"''' image. In OPS335, you will be accepting the default image file '''".qcowqcow2"''' (which stands for "QMENU Copy on Writeversion 2" ) that provides more features when manipulating stored VM images.}}

::* For Software Selection: Accept the default '''minimum install'''. None of your VMs in this course will have a GUI since GUIs needlessly consume resources and image space. <ol><li>Click '''Installation Destination''', and then click '''Done''' to confirm that an '''automatic install ''' will be performed.</li><li>Click Network & Hostname and set hostname to: '''vm1.localdomain''' and make certain the ''Ethernet connection'' is set to '''ON'''.</li><li>During installation you will be prompted to set the ''root password'' and an '''initial user account'''. For the ''initial user'', enter the same information you entered on your host machine.</li></ol>

'''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>

<li value="5">Use yum to install Install the '''bind-utils''' package. The commands it provides (e.g. nslookup) will be useful in troubleshooting your network connection.</li><li>Configure You may also want to install the virtual machine '''nmap''', '''telnet''' and '''net-tools''' packages to use help you troubleshoot connectivity issues.</li><li>Configure '''firewalld, iptables''' and (instead of firewalldif required) '''SELinux''' the same way you did for the host.</li>

<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><li>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 hostname ('''vm2.localdomain''' and '''vm3.localdomain''' respectively).</li></ol>

'''Depending on your professor you will either be asked to submit Follow the instructions for lab in class, or online0 on blackboard. Follow the appropriate set of instructions below'''

<!--===Online Submission (Peter CallaghanAndrew's Classes only)sections===Follow the instructions for lab 0 on moodle.

===In Class Submission===You may choose to:[[Image:lab1_signoff.png|thumb|right|500px|Students should be prepared with * Submit screenshots of your work on Blackboard, in which case you don'''all required commands (system information) displayed in a terminal (or multiple terminals) prior t need to come to calling the instructor for signoff'''lab.]]'''Arrange evidence (command output) for each of these items on * Or come to the lab, show me your screenwork, then ask your instructor and talk to me about it. I want to review them hear what you've learned and sign off on answer any questions you have. You'll get the same grade regardless of how you choose to submit your work. Expected results of this lab's completionare:'''

::<span style="color:green;font-size:1.5em;">&#x2713;</span> Run the '''labcheck_install.sh''' shell script on your hostmachine to show your professor the resultshost machine<br-->