Struct DockerBackendProvider 

pub struct DockerBackendProvider;

The Docker backend’s BackendProvider. Priority 10 — lower than msb’s 20, so a microVM-capable host prefers the microVM by default; Docker is the fallback for hosts without one (Intel Macs, Windows, no /dev/kvm), and doubles as the contract suite’s correctness oracle.

Trait Implementations

impl BackendProvider for DockerBackendProvider

fn name(&self) -> &str

The backend’s human id, matched case-insensitively against RIGHTSIZE_BACKEND.

fn priority(&self) -> u32

Higher wins when auto-selecting; msb’s 20 outranks docker’s 10 so a microVM- capable host prefers the microVM.

fn is_supported(&self) -> bool

True if this backend’s runtime preconditions are met on the current host (e.g. KVM available, a Docker daemon reachable).

fn unsupported_reason(&self) -> String

A human-readable reason BackendProvider::is_supported is false, shown when this backend was explicitly requested and unavailable, or when no provider on the list is supported.

fn create(&self) -> Result<Box<dyn SandboxBackend>>

Instantiates the backend. Only called after is_supported is confirmed true.