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SUSE Linux Enterprise Server 15 SP2

Virtualization Guide

Describes virtualization technology in general, and introduces libvirt—the unified interface to virtualization—and detailed information on specific hypervisors.

Publication Date: October 15, 2021
About This Manual
Available Documentation
Giving Feedback
Documentation Conventions
Product Life Cycle and Support
I Introduction
1 Virtualization Technology
1.1 Overview
1.2 Virtualization Capabilities
1.3 Virtualization Benefits
1.4 Virtualization Modes
1.5 I/O Virtualization
2 Introduction to Xen Virtualization
2.1 Basic Components
2.2 Xen Virtualization Architecture
3 Introduction to KVM Virtualization
3.1 Basic Components
3.2 KVM Virtualization Architecture
4 Virtualization Tools
4.1 Virtualization Console Tools
4.2 Virtualization GUI Tools
5 Installation of Virtualization Components
5.1 Installing KVM
5.2 Installing Xen
5.3 Installing Containers
5.4 Patterns
5.5 Installing UEFI Support
5.6 Enable Support for Nested Virtualization in KVM
6 Supported Hosts, Guests, and Features
6.1 Host Environments (Hypervisors)
6.2 Guest Environments
6.3 KVM Hardware Requirements
6.4 Feature Support
II Managing Virtual Machines with libvirt
7 Starting and Stopping libvirtd
8 Guest Installation
8.1 GUI-Based Guest Installation
8.2 Installing from the Command Line with virt-install
8.3 Advanced Guest Installation Scenarios
9 Basic VM Guest Management
9.1 Listing VM Guests
9.2 Accessing the VM Guest via Console
9.3 Changing a VM Guest's State: Start, Stop, Pause
9.4 Saving and Restoring the State of a VM Guest
9.5 Creating and Managing Snapshots
9.6 Deleting a VM Guest
9.7 Migrating VM Guests
9.8 Monitoring
10 Connecting and Authorizing
10.1 Authentication
10.2 Connecting to a VM Host Server
10.3 Configuring Remote Connections
11 Managing Storage
11.1 Managing Storage with Virtual Machine Manager
11.2 Managing Storage with virsh
11.3 Locking Disk Files and Block Devices with virtlockd
11.4 Online Resizing of Guest Block Devices
11.5 Sharing Directories between Host and Guests (File System Pass-Through)
11.6 Using RADOS Block Devices with libvirt
12 Managing Networks
12.1 Network Bridge
12.2 Virtual Networks
13 Configuring Virtual Machines with Virtual Machine Manager
13.1 Machine Setup
13.2 Storage
13.3 Controllers
13.4 Networking
13.5 Input Devices
13.6 Video
13.7 USB Redirectors
13.8 Miscellaneous
13.9 Adding a CD/DVD-ROM Device with Virtual Machine Manager
13.10 Adding a Floppy Device with Virtual Machine Manager
13.11 Ejecting and Changing Floppy or CD/DVD-ROM Media with Virtual Machine Manager
13.12 Assigning a Host PCI Device to a VM Guest
13.13 Assigning a Host USB Device to a VM Guest
14 Configuring Virtual Machines with virsh
14.1 Editing the VM Configuration
14.2 Changing the Machine Type
14.3 Configuring Hypervisor Features
14.4 Configuring CPU Allocation
14.5 Changing Boot Options
14.6 Configuring Memory Allocation
14.7 Adding a PCI Device
14.8 Adding a USB Device
14.9 Adding SR-IOV Devices
14.10 Listing Attached Devices
14.11 Configuring Storage Devices
14.12 Configuring Controller Devices
14.13 Configuring Video Devices
14.14 Configuring Network Devices
14.15 Using Macvtap to Share VM Host Server Network Interfaces
14.16 Disabling a Memory Balloon Device
14.17 Configuring Multiple Monitors (Dual Head)
14.18 Crypto adapter pass-through to KVM guests on IBM Z
15 Managing Virtual Machines with Vagrant
15.1 Introduction to Vagrant
15.2 Vagrant Boxes for SUSE Linux Enterprise
15.3 Further Reading
III Hypervisor-Independent Features
16 Disk Cache Modes
16.1 Disk Interface Cache Modes
16.2 Description of Cache Modes
16.3 Data Integrity Implications of Cache Modes
16.4 Performance Implications of Cache Modes
16.5 Effect of Cache Modes on Live Migration
17 VM Guest Clock Settings
17.1 KVM: Using kvm_clock
17.2 Xen Virtual Machine Clock Settings
18 libguestfs
18.1 VM Guest Manipulation Overview
18.2 Package Installation
18.3 Guestfs Tools
18.4 Troubleshooting
18.5 External References
19 QEMU Guest Agent
19.1 Running QEMU GA Commands
19.2 virsh Commands that Require QEMU GA
19.3 Enhancing libvirt Commands
19.4 For More Information
20 Creating crash dumps of a VM Guest
20.1 Introduction
20.2 Creating crash dumps for fully virtualized machines
20.3 Creating crash dumps for paravirtualized machines
20.4 Additional information
IV Managing Virtual Machines with Xen
21 Setting Up a Virtual Machine Host
21.1 Best Practices and Suggestions
21.2 Managing Dom0 Memory
21.3 Network Card in Fully Virtualized Guests
21.4 Starting the Virtual Machine Host
21.5 PCI Pass-Through
21.6 USB Pass-Through
22 Virtual Networking
22.1 Network Devices for Guest Systems
22.2 Host-Based Routing in Xen
22.3 Creating a Masqueraded Network Setup
22.4 Special Configurations
23 Managing a Virtualization Environment
23.1 XL—Xen Management Tool
23.2 Automatic Start of Guest Domains
23.3 Event Actions
23.4 Time Stamp Counter
23.5 Saving Virtual Machines
23.6 Restoring Virtual Machines
23.7 Virtual Machine States
24 Block Devices in Xen
24.1 Mapping Physical Storage to Virtual Disks
24.2 Mapping Network Storage to Virtual Disk
24.3 File-Backed Virtual Disks and Loopback Devices
24.4 Resizing Block Devices
24.5 Scripts for Managing Advanced Storage Scenarios
25 Virtualization: Configuration Options and Settings
25.1 Virtual CD Readers
25.2 Remote Access Methods
25.3 VNC Viewer
25.4 Virtual Keyboards
25.5 Dedicating CPU Resources
25.6 HVM Features
25.7 Virtual CPU Scheduling
26 Administrative Tasks
26.1 The Boot Loader Program
26.2 Sparse Image Files and Disk Space
26.3 Migrating Xen VM Guest Systems
26.4 Monitoring Xen
26.5 Providing Host Information for VM Guest Systems
27 XenStore: Configuration Database Shared between Domains
27.1 Introduction
27.2 File System Interface
28 Xen as a High-Availability Virtualization Host
28.1 Xen HA with Remote Storage
28.2 Xen HA with Local Storage
28.3 Xen HA and Private Bridges
V Managing Virtual Machines with QEMU
29 QEMU Overview
30 Setting Up a KVM VM Host Server
30.1 CPU Support for Virtualization
30.2 Required Software
30.3 KVM Host-Specific Features
31 Guest Installation
31.1 Basic Installation with qemu-system-ARCH
31.2 Managing Disk Images with qemu-img
32 Running Virtual Machines with qemu-system-ARCH
32.1 Basic qemu-system-ARCH Invocation
32.2 General qemu-system-ARCH Options
32.3 Using Devices in QEMU
32.4 Networking in QEMU
32.5 Viewing a VM Guest with VNC
33 Virtual Machine Administration Using QEMU Monitor
33.1 Accessing Monitor Console
33.2 Getting Information about the Guest System
33.3 Changing VNC Password
33.4 Managing Devices
33.5 Controlling Keyboard and Mouse
33.6 Changing Available Memory
33.7 Dumping Virtual Machine Memory
33.8 Managing Virtual Machine Snapshots
33.9 Suspending and Resuming Virtual Machine Execution
33.10 Live Migration
33.11 QMP - QEMU Machine Protocol
VI Managing Virtual Machines with LXC
34 Linux Containers
34.1 Setting Up LXC Distribution Containers
34.2 Setting Up LXC Application Containers
34.3 Securing a Container Using AppArmor
34.4 Differences between the libvirt LXC Driver and LXC
34.5 Sharing Namespaces across Containers
34.6 For More Information
35 Migration from LXC to libvirt-lxc
35.1 Host Migration
35.2 Container Migration
35.3 Starting the Container
Glossary
A Virtual Machine Drivers
B Appendix
B.1 Installing Paravirtualized Drivers
C XM, XL Toolstacks and Libvirt framework
C.1 Xen Toolstacks
C.2 Import Xen Domain Configuration into libvirt
C.3 Differences between the xm and xl Applications
C.4 External links
C.5 Saving a Xen Guest Configuration in an xm Compatible Format
D GNU Licenses
D.1 GNU Free Documentation License

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All information found in this book has been compiled with utmost attention to detail. However, this does not guarantee complete accuracy. Neither SUSE LLC, its affiliates, the authors nor the translators shall be held liable for possible errors or the consequences thereof.

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