Final Case Study
2. To enable dummy device support, add the following lines
to /etc/modprobe.conf:
alias dummy0 dummy
options dummy numdummies=1
3. To configure networking for dummy0, edit
the /etc/sysconfig/networkscripts/ifcfg-dummy0 file as shown in Figure 6-6.
Figure 6-6
Edit the /etc/sysconfig/networkscripts/ifcfg-dummy0 file like this.
4. Bind xenbr0 to dummy0 in order to use networking even when not connected
to a physical network.
5. Edit /etc/xen/xend-config.sxp to include the netdev=dummy0 entry as follows:
(network-script ‘network-bridge bridge=xenbr0
netdev=dummy0’)
6. Open /etc/sysconfig/network in the guest OS and modify the default gateway to
point to dummy0, as shown in Figure 6-7.
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Figure 6-7
Modify /etc/sysconfig/network in the guest OS like this.
7. Set up network address translation (NAT) in the host to allow the guest to
access the Internet, including wireless networks. NAT permits multiple
network addresses to connect through a single IP address by intercepting
packets and passing them to the private IP address. To configure NAT in Red
Hat Virtualization, copy the script in Figure 6-8 to /etc/init.d/xenLaptopNAT
and create a soft link to /etc/rc3.d/S99xenLaptopNAT.
Figure 6-8
Copy this script into /etc/init.d/xenLaptopNAT to configure NAT.
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1.
2.
3.
Chapter Summary
To use Red Hat Virtualization, users require a system running Red Hat
Enterprise Linux 5 Server with its virtualization packages.
The Red Hat Virtualization system installation process involves installing a
guest operating system in the virtualized environment and then configuring
the Red Hat Virtualization system.
Review Questions
What is Red Hat Virtualization?
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What is the difference between full virtualization and paravirtualization?
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What are the basic system requirements for Red Hat Enterprise Linux
Virtualization?
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4.
5.
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How does a user create guests with virt-manager?
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Why is it necessary to create a virtualized floppy disk controller?
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Hands-On Projects
1. Read about Linux virtualization.
Navigate to Chapter 6 of the Student Resource Center.
Open 3490182 (Linux Virtualization).pdf and read the content.
2. Read about virtualization tools.
Navigate to Chapter 6 of the Student Resource Center.
Open RHEL_5p3_wp_0109_web.pdf and read the content.
3. Read more about Linux virtualization.
Navigate to Chapter 6 of the Student Resource Center.
Open Virtualization.pdf and read the content.
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