Virtualization & Container Management Flashcards

In Podman, which command replaces 'docker-compose' for multi-container pod management?

Answer: podman-compose or podman play kube

podman-compose and 'podman play kube' both handle multi-container workloads as Podman alternatives to docker-compose.

What virtualization type does Xen use when running unmodified guest OS kernels?

Answer: Full virtualization (HVM)

Xen HVM (Hardware Virtual Machine) mode uses CPU extensions (Intel VT-x/AMD-V) to run unmodified guest kernels.

Which namespace type isolates process IDs between containers?

Answer: pid namespace

PID namespaces give each container its own process ID numbering, so PIDs don't collide between containers.

What does the Docker instruction 'ENTRYPOINT' define?

Answer: The default executable run when the container starts

ENTRYPOINT sets the main command that always runs when the container starts, making the container behave like an executable.

Which virsh command lists all defined virtual machine domains, including inactive ones?

Answer: virsh list --all

'virsh list --all' shows both running (active) and stopped (inactive) domain definitions.

What is a Docker volume bind mount used for?

Answer: Mounting a host directory path into a container

A bind mount maps a specific host filesystem path into the container, allowing direct access to host files.

In KVM, what command installs a new virtual machine from an ISO with specified RAM and disk?

Answer: virt-install

virt-install is the command-line tool for creating and provisioning new KVM virtual machines from ISOs or other sources.