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| Topic | Details |
|---|---|
Full Virtualization | |
| Virtualization Concepts and Theory | Weight: 8 Description: Candidates should know and understand the general concepts, theory and terminology of virtualization. This includes Xen, QEMU and libvirt terminology. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
| Xen | Weight: 3 Description: Candidates should be able to install, configure, maintain, migrate and troubleshoot Xen installations. The focus is on Xen version 4.x. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
| QEMU | Weight: 4 Description: Candidates should be able to install, configure, maintain, migrate and troubleshoot QEMU installations. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
| Libvirt Virtual Machine Management | Weight: 9 Description: Candidates should be able to manage virtualization hosts and virtual machines (‘libvirt domains’) using libvirt and related tools. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
| Virtual Machine Disk Image Management | Weight: 3 Description: Candidates should be able to manage virtual machines disk images. This includes converting disk images between various formats and hypervisors and accessing data stored within an image. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
Container Virtualization | |
| Container Virtualization Concepts | Weight: 7 Description: Candidates should understand the concept of container virtualization. This includes understanding the Linux components used to implement container virtualization as well as using standard Linux tools to troubleshoot these components. Key Knowledge Areas:
The following is a partial list of the used files, terms and utilities:
|
| LXC | Weight: 6 Description: Candidates should be able to use system containers using LXC and LXD. The version of LXC covered is 3.0 or higher. Key Knowledge Areas:
Partial list of the used files, terms and utilities:
|
| Docker | Weight: 9 Description: Candidate should be able to manage Docker nodes and Docker containers. This include understand the architecture of Docker as well as understanding how Docker interacts with the node’s Linux system. Key Knowledge Areas:
Partial list of the used files, terms and utilities:
|
| Container Orchestration Platforms | Weight: 3 Description: Candidates should understand the importance of container orchestration and the key concepts Docker Swarm and Kubernetes provide to implement container orchestration. Key Knowledge Areas:
|
VM Deployment and Provisioning | |
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The LPIC-3 Exam 305: Virtualization and Containerization certification exam is designed to test the candidate's understanding of virtualization and containerization technologies, including various virtualization technologies such as Xen, KVM, and VirtualBox, and containerization technologies such as Docker and Kubernetes. 305-300 Exam is also designed to test the candidate's ability to plan, implement, and maintain these technologies in a Linux environment.
NEW QUESTION # 16
The commandvirsh vol-list vmsreturns the following error:
error: failed to get pool 'vms'
error: Storage pool not found: no storage pool with matching name 'vms ' Given that the directory/vmsexists, which of the following commands resolves this issue?
Answer: E
Explanation:
The command virsh pool-create-as vms dir --target /vms creates and starts a transient storage pool named vms of type dir with the target directory /vms12. This command resolves the issue of the storage pool not found error, as it makes the existing directory /vms visible to libvirt as a storage pool. The other commands are invalid because:
* dd if=/dev/zero of=/vms bs=1 count=0 flags=name:vms is not a valid command syntax. The dd command does not take a flags argument, and the output file /vms should be a regular file, not a directory3.
* libvirt-poolctl new --name=/vms --type=dir --path=/vms is not a valid command name. There is no such command as libvirt-poolctl in the libvirt package4.
* qemu-img pool vms:/vms is not a valid command syntax. The qemu-img command does not have a pool subcommand, and the vms:/vms argument is not a valid image specification5.
* touch /vms/.libvirtpool is not a valid command to create a storage pool. The touch command only creates an empty file, and the .libvirtpool file is not recognized by libvirt as a storage pool configuration file6.
References:
1: virsh - difference between pool-define-as and pool-create-as - Stack Overflow
2: dd(1) - Linux manual page - man7.org
3: 12.3.3. Creating a Directory-based Storage Pool with virsh - Red Hat Customer Portal
4: libvirt - Linux Man Pages (3)
5: qemu-img(1) - Linux manual page - man7.org
6: touch(1) - Linux manual page - man7.org
NEW QUESTION # 17
Which of the following commands deletes all volumes which are not associated with a container?
Answer: D
Explanation:
Explanation
The command that deletes all volumes which are not associated with a container is docker volume prune. This command removes all unused local volumes, which are those that are not referenced by any containers. By default, it only removes anonymous volumes, which are those that are not given a specific name when they are created. To remove both unused anonymous and named volumes, the --all or -a flag can be added to the command. The command will prompt for confirmation before deleting the volumes, unless the --force or -f flag is used to bypass the prompt. The command will also show the total reclaimed space after deleting the volumes12.
The other commands listed in the question are not valid or do not have the same functionality as docker volume prune. They are either made up, misspelled, or have a different purpose. These commands are:
* docker volume cleanup: This command does not exist in Docker. There is no cleanup subcommand for docker volume.
* docker volume orphan -d: This command does not exist in Docker. There is no orphan subcommand for docker volume, and the -d flag is not a valid option for any docker volume command.
* docker volume vacuum: This command does not exist in Docker. There is no vacuum subcommand for docker volume.
* docker volume garbage-collect: This command does not exist in Docker. There is no garbage-collect subcommand for docker volume.
References:
* docker volume prune | Docker Docs
* How to Remove all Docker Volumes - YallaLabs.
NEW QUESTION # 18
When using direct Linux booting to start Linux within a KVM virtual machine, which KVM parameter is used to specify parameters for the Linux kernel?
(Specify ONLY the option name without any values or parameters.)
Answer:
Explanation:
-append
Explanation:
When usingdirect kernel bootingwith KVM/QEMU, the-appendoption is used to passkernel command-line parametersto the Linux kernel. This allows administrators to specify boot-time options such as root filesystem location, console settings, or debugging flags.
Official QEMU documentation lists -append as the correct parameter for kernel arguments, making this answer correct.
NEW QUESTION # 19
Which of the following tools is not typically used for VM provisioning and image creation?
Answer: B
Explanation:
VM provisioning and image creation tools are used tobuild, configure, and initialize virtual machine images. According to virtualization documentation,Packeris specifically designed for automated image creation,Vagrantis used for provisioning reproducible development environments, andcloud-initis used to configure instances at first boot.
Kubernetes, however, is acontainer orchestration platform, not a VM provisioning or image creation tool.
It manages containerized workloads after infrastructure has already been provisioned.
Documentation clearly separatesinfrastructure provisioning toolsfromapplication orchestration platforms
. As such, Kubernetes is not typically used for VM provisioning or image creation.
Therefore, the correct answer isA.
NEW QUESTION # 20
What happens when the following command is executed twice in succession?
docker run -tid -v data:/data debian bash
Answer: C
Explanation:
The command docker run -tid -v data:/data debian bash creates and runs a new container from the debian image, with an interactive terminal and a detached mode, and mounts a named volume data at /data in the container12. If the volume data does not exist, it is created automatically3. If the command is executed twice in succession, two containers are created and run, each with its own terminal and process ID, but they share the same volume data. This means that both containers can access, modify, and see the contents of the data volume, and any changes made by one container are reflected in the other container. Therefore, the statement C is true and the correct answer. The statements A, B, D, and E are false and incorrect, as they do not describe the behavior of the command or the volume correctly. References:
* 1: docker run | Docker Docs.
* 2: Docker run reference | Docker Docs - Docker Documentation.
* 3: Use volumes | Docker Documentation.
* [4]: How to Use Docker Run Command with Examples - phoenixNAP.
NEW QUESTION # 21
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