Changes

= LAB PREPARATION =

[[Image:vmware-1a.png|thumb|right|400px|At the end of lab2, your VMware Workstation application will contain '''4 virtual machines''' ('''c7host''' in your '''VMware Workstation''' application, and '''centos1, centos2, centos3 VMs''' in your '''KVM''' application). You will now have the option to run one virtual machine at a time, or run all machines simultaneously to learn about networking (covered in later labs) ]]

[http://man7.org/linux/man-pages/man1/chmod.1.html chmod]<br>

[http://ss64.com/vi.html vi]

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:::*Home: http://mirror.netflash.net/centos/7/os/x86_64/

:: '''Kickstart File URL (Kernel options): '''

:: '''VM Image Pathname:''' /var/lib/libvirt/images/centos3.qcow2

:: '''Memory:''' 2048MB ('''IMPORTANT''' Do not use less than 2048MB during installation.)

# Create the VM (called '''centos3''')

# Then click the '''forward''' button to proceed. Make certain to select the correct Memory Size and Disk Space size shown in the VM Details above

# Make certain to enter the name: '''centos3''', <u>AND</u> then select the option: '''Customize configuration before install''', and select '''Copy Host CPU Configuration''', click '''Apply''', and then click '''Begin Installation'''.

# Record the time taken to install, and compare this to the time taken by the previous installations.<br><br>If during the installation, you see the message at the bottom '''Pane is Dead''', click the '''Virtual Machine''' menu at the top, select '''Shut Down''' -> '''Force Off''', '''right-click''' on '''centos3''' in the ''virtual manager'' window and select '''Delete'''. Redo the VM setup for a new instance of the ''centos3'' VM.<br><br>

# What happens when the installation is finished?

# Boot the virtual machine and log in (use the user ID and password information from the previous step to gain access to this VM).

# Compare the experience to the first time you booted the other virtual machines.

<li> Make certain you are in your '''/var/lib/libvirt/images directory'''. Restore the original image from the backup from your home directory to your '''images''' directory by typing this command:<br><b><code><span style="color:#3366CC;font-size:1.2em;">gunzip < ~YourUserId/centos3.qcow2.backup.gz > centos3.qcow2'''</span></code></b></li>

<li> Restart the VM. Is it working normally?</li>

<li> Execute the following command: <b><code><span style="color:#3366CC;font-size:1.2em;">virsh dumpxml centos3 > centos3.xml</span></code></b></li>

<li> Examine the file <b><code><span style="color:#3366CC;font-size:1.2em;">centos3.xml</span></code></b>. What does it contain? What format is it in?<br></li></ol>

=== Part 2: Restoring Virtual Machines ===

# We will now learn how to download a compressed image file and XML configuration file and add it as a VM to the Virtual Machine Manager menu.

# Copy these files to the '''/var/lib/libvirt/images''' directory and decompress the qcow2 image file.

# Make certain your present working directory is: '''/var/lib/libvirt/images'''

{{Admon/important|Virtual Machine Does not Shutdown from Command|If the Virtual machine fails to shutdown from the <code>virsh shutdown</code> command, then you can go to the '''Virtual Machine manager''' and '''halt''' or '''shutdown''' within the VM itself, then you can click the '''PowerOff''' button in the VM window. You'll want to avoid a forced shutdown since those are equivalent to yanking the power cord out of the wall on a physical machine!|}}

<ol><li value="9">Open a Bash shell terminal and login as root.</li>

<li>Enter the following text content into your text-editing session:</li></ol>

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# Use the '''virsh start''' command to launch all the VMs ('''centos1''', '''centos2''', and '''centos3''').

# Switch to your '''c7host''' VM, open a terminal, login as root, and change directory to '''/root/bin'''.

# Issue the Linux command: <b><code><span style="color:#3366CC;font-size:1.2em;">wget https://ict.senecacollege.ca/~ops235/lab2/lab2-check.bash</span></code></b>

[[Category:OPS235]]

[[Category:OPS235 Labs]]