Struct GrowthFacts 

pub struct GrowthFacts {
    pub kind: Option<DiskKind>,
    pub is_pid1: bool,
    pub grow: Option<Summary>,
    pub runtime_engine: bool,
    pub hotplug: bool,
}

What the machine says about the set under the data root. Two measured facts and nothing inferred; decide_growth turns them into a verdict.

Fields

kind: Option<DiskKind>

The mount and the array under it, as crate::dashboard::probe::disk_kind reads them. None when the data root is not a mount point of its own, or /proc/mounts is unreadable — which is the honest UNKNOWN, not a growable answer.

is_pid1: bool

This process is PID 1. On the appliance gunnar IS init: there is no shell beside it, so nothing on the machine can grow a filesystem out of band. On a developer box or in a container beside an init this is false and an operator’s hands still exist.

grow: Option<Summary>

The boot stack’s grow journal (/serialdat/grow-journal, DATA-SET-GROWTH-DESIGN.md), when this box’s korp-start keeps one — which is the measured fact that the boot stack CAN grow the set at a restart. None on an image older than the engine, where the appliance is as sealed as it ever was.

runtime_engine: bool

This gunnar-server links the runtime grow engine (crate::grow, feature grow-runtime): with the journal on the box, the set grows WITHOUT a restart through Admin.GrowStart. A build fact, read once.

hotplug: bool

The running kernel has PCI hot-plug (crate::dashboard::probe::pci_hotplug). UpCloud resizes only DETACHED volumes, so without it a member detached and re-attached while gunnar runs is invisible: the engine is there, the growth is not.

Implementations

impl GrowthFacts

pub fn measure(root: &Path) -> GrowthFacts

Read them off the running machine.

Trait Implementations

impl Clone for GrowthFacts

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GrowthFacts

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for GrowthFacts

impl PartialEq for GrowthFacts

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for GrowthFacts