LPIC-3 305-300

What is the purpose of the command vangrant init?. It installs Vagrant on a Linux host. It executes a provising tool in a running box. It downloads a Vangrant boc. It starts a Vangrant box. It creates a Vangrant configuration file.

In order to use the option dom0_mem to limit the amount of memory assigned to the Xen Domain-0, where must this option be speficified?. In the configuration file /etc/xen/Domain-0.cfg, when Xen starts. In its .config file, when the Domain-0 kernel is built. In any of Xen's global configuration files. In the bootloader configuration, when Xen is booted. In its Makefile, when Xen is built.

Which funcionality is provided by Vangrant as well by Docker? (Chosse three). Both start system images as virtual machines instead of containers by defautlt. Both can share directories from the host file system to a guest. Both start system images as containers instead of virtual machines by default. Both can download required base images. Both can apply changes to a base image.

What is the default provider of Vangrant?. docker. virtualbox. vmware_workstation. lxc. hyperv.

In an IaaS cloud, what is a common method for provisioning new computing instances with an operating system and software?. Each new instance is a clone of another currently running instance that includes all the software, data and state of the original instance. Each new instance is connected via a VPN with the computer that started the provisioning and tries to PXE boot from that machine. Each new instance is created based on an image file that contains the operating system as well as software and default configuration for a given purpose. Each new instance contains a minimal live system running from a virtual CD as the basis from wich the administrator deploys the target operating system. Each new instance is connected to the installation media of a Linux distribution and provides access to the installer by logging in via SSH.

Which command within virsh lists the virtual machines that are running on the current host?. list. I view. list-vm. show. list-all.

What is the purpose of cloud-init?. Orchestrate the creation and start of multiple related IaaS instance. Standartize the configuration of infrastructure services, such as load balancers of virtual firewalls in a cloud. Assign as IaaS instance to a specific computing node within a cloud. Prepare the generic image of an IaaS instance to fit a specific instance's configuration. Replace common Linix inic systems, such as systemd or SysV init.

What is the purpose of the packer inspect subcommand?. Show usage statistics of a Packer image. Retrieve files from an existing Packer image. Display an overview of the configuration contained in a Packer template. Execute commands within a running instance of a Packer image. List the artifacts created during the build process of a Packer image.

What is the purpose of capabilities in the context of container virtualization?. Allow regular users to start containers with elevated permissions. Restrict the disk space container can consume. Map potentially dangerous system call to an emulation layer provided by the container virtualization. Enable memory deduplication to cache files which exist in multiple container. Prevent process from performing actions which might infringe the container.

Which directory is used by cloud-init to store status information and configuration information retrieved from external sources?. /opt/cloud/var/. /tmp/.cloud/. /proc/sys/cloud/. /var/lib/cloud/. /etc/cloud-init/cache/.

Which of the following statements are true about container-based virtualization? (Choose two). Different containers may use different distributions of the same operating system. Container-based virtualization relies on hardware support from host system's CPU. All containers run within the operating system kernel of the host system. Each container runs it own operating system kernel. Linux does not support container-based virtualization because of missing APIs.

How does Packer interact with system images?. Packer installs a client within the image which has to be run periodically via cron in order to retrieve the latest template from Packer server and apply it locally. Packer periodically connects through the network to the Packer daemons of all running Packer images in order to re-apply the whole template to the running instance. Packer downloads and extracts an image in order make changes to the image's file system, repack the modified image and upload it again. Packer has to be installed within the target image and is executed during the image's first boot in order to execute preparations tasks. Packer creates an instance based on a source image, prepares the instance through a network connection and bundles the resulting instance as a new system IMAGE.

After setting up a data container using the following command: docker created -v /data --name datastore debian /bin/true how is an additional new container started which shares the /data volume with datastore container?. docker run -v datastore:/data --name service debian bash. docker run --share-with datastore --name service debian bash. docker run -v /data --name service debian bash. docker run --volumes-from datastore --name service debian bash. docker run --volume-backend datastore -v /data --name service debian bash.

After creating a new Docker network using the following command: docker network create --drive brigde isolate_nw which parameter must be added to docker create in order to attach a container to the netwok?. --eth0=isolated_nw. --attach=isolated_nw. --networkisolated_nw. --alias=isolated_nw. --ethernet=isolated_nw.

What LXC command lists containers sorted by their CPU, block I/O or memory consumption? (Specify ONLY the command without any path or parameters.).

Which of the following network interfaces types are valid is an LXD container configuration? (Choose three). bridged. physical. macvlan. ipsec. wif.