Enum LifecycleReason 

#[non_exhaustive]
pub enum LifecycleReason {
    Oom,
    TtlExceeded,
    VmmCrashed,
    BootFailed,
    SignalKilled,
    InitCrashed,
    KernelCannotMountRoot,
    Other(String),
}

FC-50 typed reason for dev.cellos.events.cell.lifecycle.v1.failed / .destroyed payloads.

Replaces the free-form Option<&str> reason used by gap-markers in FC-23, FC-52, FC-59, FC-60, FC-61, FC-63, FC-72 with a constrained set of audit- stable codes. Each variant serializes to its snake_case form so the JSON wire format is stable for downstream auditors. Other(String) is the escape hatch for operator-supplied free-form reasons that have not yet earned a dedicated variant; it serializes verbatim as the inner string.

The typed surface is non-exhaustive — adding a new variant is a public-API change that requires schema updates on the cell.lifecycle.v1.failed / .destroyed contracts. Downstream matches outside this crate must include a wildcard arm; #[non_exhaustive] is enforced by the compiler so silent breaks at variant-add time aren’t possible.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Oom

Workload exceeded its memory limit (cgroup OOM kill or VMM-level OOM).

TtlExceeded

TTL watchdog fired before the workload completed.

VmmCrashed

VMM process exited unexpectedly (e.g. Firecracker crashed).

BootFailed

Kernel/init failed before reaching /sbin/init.

SignalKilled

Supervisor SIGKILLed the workload after the graceful-shutdown timeout elapsed.

InitCrashed

cellos-init segfaulted or aborted inside the guest.

KernelCannotMountRoot

Kernel panicked because it could not mount the rootfs (rootfs corruption / wrong fs / missing block device).

Other(String)

Operator-supplied free-form reason. Serialized verbatim — prefer a typed variant when one applies.

Implementations

impl LifecycleReason

pub fn as_wire_str(&self) -> &str

Wire-form string for this reason. Typed variants serialize to snake_case; Other(s) returns the inner string verbatim.

Trait Implementations

impl Clone for LifecycleReason

fn clone(&self) -> LifecycleReason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LifecycleReason

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

Formats the value using the given formatter.

impl Display for LifecycleReason

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

Formats the value using the given formatter.

impl PartialEq for LifecycleReason

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LifecycleReason

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl Eq for LifecycleReason

impl StructuralPartialEq for LifecycleReason