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→Part 3: Using Shell Scripts for VM Backup & Management
= 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) ]]
<blockquote><code style="font-family:courier;font-size:1.2em;margin-left:20px;">
<br>linuxefi /vmlinuz-3.10.0-6931062.21.2.el7.x86_64 root=/dev/mapper/centos_c7host-root ro crashkernel=auto rd.lvm.lv=centos_c7host/root rd.lvm.lv=centos_c7host/swap rhgb quiet LANG=en_CA.UTF-8 <span style="color:blue;font-weight:bold">kvm-intel.nested=1</span><br> initrdefi /initramfs-3.10.0-6931062.21.2.el7.x86_64.img
</code></blockquote>
<blockquote><code style="font-family:courier;font-size:1.2em;margin-left:20px;">
<br>
linuxefi /boot/vmlinuz-3.10.0-327.18.21062.el7.x86_64 root=/dev/mapper/centos_c7host-root ro crashkernel=auto rd.lvm.lv=centos_c7host/root rd.lvm.lv=centos_c7host/swap rhgb quiet LANG=en_CA.UTF-8 <span style="color:blue;font-weight:bold">kvm-intel.nested=1</span><br>initrdefi /boot/initramfs-3.10.0-327.18.21062.el7.x86_64.img
</code></blockquote>
# 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?
# Click '''In a web browser''', click the kickstart file (KS) link above. This link in is a web-browser, and record text file. Read through it to find the following information (pay attention to access lines starting with #) and record it in your centos3 VMLab Logbook:<ul><li>'''Regular-user account name'''</li><li>'''Regular-user account password'''</li><li>'''Root Password'''</li></ul>
# 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 ===
{{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>Use a text editor (such as <b><code><span style="color:#3366CC;font-size:1.2em;">vi</span></code></b> or <b><code><span style="color:#3366CC;font-size:1.2em;">nano</span></code></b>) to create a Bash Shell script called: <b><code><span style="color:#3366CC;font-size:1.2em;">backupVM.bash</span></code></b> in /root's home /bin directory.</li>
<li>Enter the following text content into your text-editing session:</li></ol>
<code style="color:#3366CC;font-family:courier;font-size:.9em;">
[[Category:OPS235]]
[[Category:OPS235 Labs]]
[[Category:CentOS 7]]
[[Category:SSD2]]
