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Lpi 305-300 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: VM Deployment and Provisioning10%- Vagrant
  • 1. Vagrantfiles and providers
  • 2. Provisioning of virtual machines with Vagrant
  • 3. Use Vagrant to manage virtual machines
- Cloud Management Tools
  • 1. Basic feature knowledge of commonly available cloud management tools
  • 2. Common offerings in public clouds
- Cloud Init
  • 1. Cloud-init configuration and modules
  • 2. Using cloud-init for instance initialization
- Packer
  • 1. Using Packer for automated image building
  • 2. Packer templates and builders
Topic 2: Container Virtualization25%- Docker
  • 1. How Docker interacts with the node's Linux system
  • 2. Docker architecture
  • 3. Managing volumes and networks
  • 4. Building images with Dockerfiles
  • 5. Manage Docker nodes and Docker containers
  • 6. Deploying applications with Docker
- Container Virtualization Concepts
  • 1. Linux capabilities
  • 2. Differences between system containers and application containers
  • 3. Troubleshooting container components using standard Linux tools
  • 4. Concept of container virtualization
  • 5. Linux kernel components: namespaces and cgroups
- LXC
  • 1. Use system containers using LXC and LXD
  • 2. LXC/LXD profiles and images
  • 3. Resource limits configuration
  • 4. LXC version 3.0 or higher
- Container Orchestration Platforms
  • 1. Understanding container orchestration importance
  • 2. Kubernetes key concepts
  • 3. Docker Compose
  • 4. Docker Swarm key concepts
Topic 3: Full Virtualization25%- Virtualization Concepts and Theory
  • 1. Hardware virtualization extensions (VT-x/AMD-V)
  • 2. Device emulation vs paravirtual drivers
  • 3. General concepts, theory and terminology of virtualization
  • 4. Hypervisor architectures
  • 5. Xen, QEMU and libvirt terminology
- Virtual Machine Disk Image Management
  • 1. Accessing data stored within an image
  • 2. Backing file chains and snapshot handling
  • 3. Converting disk images between formats and hypervisors
  • 4. Manage virtual machines disk images
  • 5. qcow2 vs raw formats
  • 6. qemu-img info, convert, resize operations
- QEMU
  • 1. QEMU machine types
  • 2. Install, configure, maintain, migrate and troubleshoot QEMU installations
  • 3. QEMU networking
  • 4. QEMU command line tools
- Libvirt Virtual Machine Management
  • 1. virsh command usage (list, define, undefine, start, stop)
  • 2. Virtual networking and storage management
  • 3. Domain XML configuration
  • 4. Manage virtualization hosts and VMs (libvirt domains) using libvirt and related tools
  • 5. Snapshots and migrations
  • 6. virt-install options
- Xen
  • 1. Xen version 4.x
  • 2. Domain configuration
  • 3. Install, configure, maintain, migrate and troubleshoot Xen installations
  • 4. Xen management tools

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Lpi LPIC-3 Exam 305: Virtualization and Containerization Sample Questions (Q68-Q73):

NEW QUESTION # 68
How can data be shared between several virtual machines running on the same Linux-based host system?

Answer: A

Explanation:
The correct way to share data between several virtual machines running on the same Linux-based host system is by using a network file system or file transfer protocol. A network file system (NFS) is a distributed file system protocol that allows a user on a client computer to access files over a network in a manner similar to how local storage is accessed1. A file transfer protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network2. Both methods allow data to be shared between virtual machines regardless of their underlying file systems or virtualization technologies. The other options are incorrect because they either do not work or are not feasible. Option A is wrong because each virtual machine has its own file system that is not directly accessible by other virtual machines. Option B is wrong because there is no such device as /dev/virt-disks/remote/ that can be used to mount other virtual machines' file systems. Option C is wrong because a ramdisk is a volatile storage device that is not suitable for sharing data between virtual machines. Option E is wrong because attaching the same virtual hard disk to multiple virtual machines can cause data corruption and conflicts, and EXT4 does not have any sharing extensions that can prevent this. References:https://kb.vmware.com/s/article/1012706
https://bing.com/search?q=data+sharing+between+virtual+machines


NEW QUESTION # 69
Which of the following resources can be limited by libvirt for a KVM domain? (Choose two.)

Answer: A,C

Explanation:
Explanation
Libvirt is a toolkit that provides a common API for managing different virtualization technologies, such as KVM, Xen, LXC, and others. Libvirt allows users to configure and control various aspects of a virtual machine (also called a domain), such as its CPU, memory, disk, network, and other resources. Among the resources that can be limited by libvirt for a KVM domain are:
* Amount of CPU time: Libvirt allows users to specify the number of virtual CPUs (vCPUs) that a domain can use, as well as the CPU mode, model, topology, and tuning parameters. Users can also set the CPU shares, quota, and period to control the relative or absolute amount of CPU time that a domain can consume. Additionally, users can pin vCPUs to physical CPUs or NUMA nodes to improve performance and isolation. These settings can be configured in the domain XML file under the <cpu> and <cputune> elements12.
* Size of available memory: Libvirt allows users to specify the amount of memory that a domain can use, as well as the memory backing, tuning, and NUMA node parameters. Users can also set the memory hard and soft limits, swap hard limit, and minimum guarantee to control the memory allocation and reclaim policies for a domain. These settings can be configured in the domain XML file under the <memory>, <memoryBacking>, and <memtune> elements13.
The other resources listed in the question are not directly limited by libvirt for a KVM domain. File systems allowed in the domain are determined by the disk and filesystem devices that are attached to the domain, which can be configured in the domain XML file under the <disk> and <filesystem> elements14. Number of running processes and number of available files are determined by the operating system and the file system of the domain, which are not controlled by libvirt.
References:
* libvirt: Domain XML format
* CPU Allocation
* Memory Allocation
* Hard drives, floppy disks, CDROMs


NEW QUESTION # 70
FILL BLANK
What LXC command starts a new process within a running LXC container? (Specify ONLY the command without any path or parameters.)

Answer:

Explanation:
lxc-attach
Explanation
The lxc-attach command allows the user to start a new process within a running LXC container12. It takes the name of the container as an argument and optionally a command to execute inside the container. If no command is specified, it creates a new shell inside the container1. For example, to list all the files in the home directory of a container named myContainer, one can use:
lxc-attach -n myContainer - ls -lh /home
References:
* 1: Executing a command inside a running LXC - Unix & Linux Stack Exchange


NEW QUESTION # 71
Which of the following are true regarding the CPU of a QEMU virtual machine? (Choose two.)

Answer: A,B

Explanation:
The CPU architecture of a QEMU virtual machine is independent of the host system's architecture. QEMU can emulate many CPU architectures, including x86, ARM, Alpha, and SPARC, regardless of the host system' s architecture1. This allows QEMU to run guest operating systems that are not compatible with the host system's hardware. Therefore, option A is correct. QEMU virtual machines support multiple virtual CPUs in order to run SMP systems. QEMU uses the concept of virtual CPUs (vCPUs) to map the virtual machines to physical CPUs. Each vCPU is a thread that runs on a physical CPU core. QEMU allows the user to specify the number of vCPUs and the CPU model for each virtual machine. QEMU can run SMP systems with multiple vCPUs, as well as single-processor systems with one vCPU2. Therefore, option E is also correct. The other options are incorrect because they do not describe the CPU of a QEMU virtual machine. Option B is wrong because QEMU virtual machines can have more than one CPU with more than one core. Option C is wrong because QEMU does not require a dedicated physical CPU core for each virtual machine. QEMU can share the physical CPU cores among multiple virtual machines, depending on the load and the scheduling policy. Option D is wrong because QEMU does not use the term CPU, but vCPU, to refer to the virtual machines' processors. References:
* QEMU vs VirtualBox: What's the difference? - LinuxConfig.org
* QEMU / KVM CPU model configuration - QEMU documentation
* Introduction - QEMU documentation
* Qemu/KVM Virtual Machines - Proxmox Virtual Environment


NEW QUESTION # 72
Which of the following commands moves the libvirt domainweb1from the current host system to the host systemhost2?

Answer: B

Explanation:
The correct command to move the libvirt domain web1 from the current host system to the host system host2 is virsh migrate web1 qemu+ssh://host2/system. This command uses the virsh migrate command, which initiates the live migration of a domain to another host1. The first argument is the name of the domain to migrate, which in this case is web1. The second argument is the destination URI, which specifies the connection to the remote host and the hypervisor to use2. In this case, the destination URI is qemu+ssh://host2
/system, which means to use the QEMU driver and connect to host2 via SSH, and use the system instance of libvirtd3. The other options are incorrect because they either use invalid commands or arguments, such as node-update, pool-add, patch, or cp, or they do not specify the destination URI correctly. References:
https://balamuruhans.github.io/2019/01/09/kvm-migration-with-libvirt.html
http://libvirt.org/migration.html


NEW QUESTION # 73
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