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SUSE Linux Enterprise Server 15

Virtualization Guide

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

Publication Date: January 21, 2022
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 Introduction to Linux Containers
5 Virtualization Tools
5.1 Virtualization Console Tools
5.2 Virtualization GUI Tools
6 Installation of Virtualization Components
6.1 Installing KVM and Xen
6.2 Installing Containers
6.3 Patterns
6.4 Installing UEFI Support
7 Supported Guests, Hosts and Features
7.1 Supported VM Guests
7.2 Supported VM Host Servers for SUSE Linux Enterprise Server 15 VM Guests
7.3 KVM Hardware Requirements
7.4 Feature Support
II Managing Virtual Machines with libvirt
8 Starting and Stopping libvirtd
9 Guest Installation
9.1 GUI-Based Guest Installation
9.2 Installing from the Command Line with virt-install
9.3 Advanced Guest Installation Scenarios
10 Basic VM Guest Management
10.1 Listing VM Guests
10.2 Accessing the VM Guest via Console
10.3 Changing a VM Guest's State: Start, Stop, Pause
10.4 Saving and Restoring the State of a VM Guest
10.5 Creating and Managing Snapshots
10.6 Deleting a VM Guest
10.7 Migrating VM Guests
10.8 Monitoring
11 Connecting and Authorizing
11.1 Authentication
11.2 Connecting to a VM Host Server
11.3 Configuring Remote Connections
12 Managing Storage
12.1 Managing Storage with Virtual Machine Manager
12.2 Managing Storage with virsh
12.3 Locking Disk Files and Block Devices with virtlockd
12.4 Online Resizing of Guest Block Devices
12.5 Sharing Directories between Host and Guests (File System Pass-Through)
12.6 Using RADOS Block Devices with libvirt
13 Managing Networks
13.1 Virtual Networks
13.2 Bridged Networking
14 Configuring Virtual Machines with Virtual Machine Manager
14.1 Machine Setup
14.2 Storage
14.3 Controllers
14.4 Networking
14.5 Input Devices
14.6 Video
14.7 USB Redirectors
14.8 Miscellaneous
14.9 Adding a CD/DVD-ROM Device with Virtual Machine Manager
14.10 Adding a Floppy Device with Virtual Machine Manager
14.11 Ejecting and Changing Floppy or CD/DVD-ROM Media with Virtual Machine Manager
14.12 Assigning a Host PCI Device to a VM Guest
14.13 Assigning a Host USB Device to a VM Guest
15 Configuring Virtual Machines with virsh
15.1 Editing the VM Configuration
15.2 Managing Guest Memory Allocation (Xen only)
15.3 Changing the Machine Type
15.4 Configuring CPU Allocation
15.5 Changing Boot Options
15.6 Configuring Memory Allocation
15.7 Adding a PCI Device
15.8 Adding a USB Device
15.9 Adding SR-IOV Devices
15.10 Listing Attached Devices
15.11 Configuring Storage Devices
15.12 Configuring Controller Devices
15.13 Configuring Video Devices
15.14 Configuring Network Devices
15.15 Using Macvtap to Share VM Host Server Network Interfaces
15.16 Disabling a Memory Balloon Device
15.17 Configuring Multiple Monitors (Dual Head)
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 Creating crash dumps of a VM Guest
19.1 Introduction
19.2 Creating crash dumps for fully virtualized machines
19.3 Creating crash dumps for paravirtualized machines
19.4 Additional information
IV Managing Virtual Machines with Xen
20 Setting Up a Virtual Machine Host
20.1 Best Practices and Suggestions
20.2 Managing Dom0 Memory
20.3 Network Card in Fully Virtualized Guests
20.4 Starting the Virtual Machine Host
20.5 PCI Pass-Through
20.6 USB Pass-Through
21 Virtual Networking
21.1 Network Devices for Guest Systems
21.2 Host-Based Routing in Xen
21.3 Creating a Masqueraded Network Setup
21.4 Special Configurations
22 Managing a Virtualization Environment
22.1 XL—Xen Management Tool
22.2 Automatic Start of Guest Domains
22.3 Event Actions
22.4 Time Stamp Counter
22.5 Saving Virtual Machines
22.6 Restoring Virtual Machines
22.7 Virtual Machine States
23 Block Devices in Xen
23.1 Mapping Physical Storage to Virtual Disks
23.2 Mapping Network Storage to Virtual Disk
23.3 File-Backed Virtual Disks and Loopback Devices
23.4 Resizing Block Devices
23.5 Scripts for Managing Advanced Storage Scenarios
24 Virtualization: Configuration Options and Settings
24.1 Virtual CD Readers
24.2 Remote Access Methods
24.3 VNC Viewer
24.4 Virtual Keyboards
24.5 Dedicating CPU Resources
24.6 HVM Features
25 Administrative Tasks
25.1 The Boot Loader Program
25.2 Sparse Image Files and Disk Space
25.3 Migrating Xen VM Guest Systems
25.4 Monitoring Xen
25.5 Providing Host Information for VM Guest Systems
26 XenStore: Configuration Database Shared between Domains
26.1 Introduction
26.2 File System Interface
27 Xen as a High-Availability Virtualization Host
27.1 Xen HA with Remote Storage
27.2 Xen HA with Local Storage
27.3 Xen HA and Private Bridges
V Managing Virtual Machines with QEMU
28 QEMU Overview
29 Setting Up a KVM VM Host Server
29.1 CPU Support for Virtualization
29.2 Required Software
29.3 KVM Host-Specific Features
30 Guest Installation
30.1 Basic Installation with qemu-system-ARCH
30.2 Managing Disk Images with qemu-img
31 Running Virtual Machines with qemu-system-ARCH
31.1 Basic qemu-system-ARCH Invocation
31.2 General qemu-system-ARCH Options
31.3 Using Devices in QEMU
31.4 Networking in QEMU
31.5 Viewing a VM Guest with VNC
32 Virtual Machine Administration Using QEMU Monitor
32.1 Accessing Monitor Console
32.2 Getting Information about the Guest System
32.3 Changing VNC Password
32.4 Managing Devices
32.5 Controlling Keyboard and Mouse
32.6 Changing Available Memory
32.7 Dumping Virtual Machine Memory
32.8 Managing Virtual Machine Snapshots
32.9 Suspending and Resuming Virtual Machine Execution
32.10 Live Migration
32.11 QMP - QEMU Machine Protocol
VI Managing Virtual Machines with LXC
33 Linux Containers
33.1 Setting Up LXC Distribution Containers
33.2 Setting Up LXC Application Containers
33.3 Securing a Container Using AppArmor
33.4 Differences between the libvirt LXC Driver and LXC
33.5 Sharing Namespaces across Containers
33.6 For More Information
34 Migration from LXC to libvirt-lxc
34.1 Host Migration
34.2 Container Migration
34.3 Starting the Container
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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