Enum SourceKind 

#[non_exhaustive]
pub enum SourceKind {
    EnvOverride,
    FileOverride,
    Container,
    Lxc,
    MachineId,
    DbusMachineId,
    Dmi,
    LinuxHostId,
    IoPlatformUuid,
    WindowsMachineGuid,
    FreeBsdHostId,
    KenvSmbios,
    BsdKernHostId,
    IllumosHostId,
    AwsImds,
    GcpMetadata,
    AzureImds,
    DigitalOceanMetadata,
    HetznerMetadata,
    OciMetadata,
    OpenStackMetadata,
    KubernetesPodUid,
    KubernetesServiceAccount,
    KubernetesDownwardApi,
    Custom(&'static str),
}

Short, stable label identifying a source.

Covers every built-in source plus a SourceKind::Custom variant for consumer-defined sources. Displayed in error messages, logs, and on the resolved crate::HostId.

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.

EnvOverride

Environment-variable override.

FileOverride

File-path override.

Container

Container runtime ID extracted from /proc/self/mountinfo (Linux).

Lxc

LXC/LXD container name from /proc/self/cgroup or /proc/self/mountinfo, salted with /etc/machine-id (Linux).

MachineId

/etc/machine-id (Linux).

DbusMachineId

/var/lib/dbus/machine-id (Linux).

Dmi

/sys/class/dmi/id/product_uuid — SMBIOS system UUID (Linux).

LinuxHostId

/etc/hostid — glibc 4-byte legacy host identifier (Linux).

IoPlatformUuid

IOPlatformUUID from IOPlatformExpertDevice (macOS).

WindowsMachineGuid

HKLM\SOFTWARE\Microsoft\Cryptography\MachineGuid (Windows).

FreeBsdHostId

/etc/hostid (FreeBSD).

KenvSmbios

kenv smbios.system.uuid (FreeBSD SMBIOS).

BsdKernHostId

sysctl kern.hostid (NetBSD, OpenBSD).

IllumosHostId

hostid(1) (illumos, Solaris).

AwsImds

AWS EC2 instance ID via IMDSv2.

GcpMetadata

GCP Compute Engine numeric instance ID via the metadata server.

AzureImds

Azure VM UUID via the Azure Instance Metadata Service.

DigitalOceanMetadata

DigitalOcean Droplet numeric ID.

HetznerMetadata

Hetzner Cloud numeric server ID.

OciMetadata

Oracle Cloud Infrastructure instance OCID.

OpenStackMetadata

OpenStack Nova instance UUID via the metadata service.

KubernetesPodUid

Kubernetes pod UID derived from /proc/self/mountinfo.

KubernetesServiceAccount

Kubernetes service-account namespace.

KubernetesDownwardApi

Kubernetes downward-API projected file.

Custom(&'static str)

Caller-supplied source; the payload is a short label for logs.

The label appears verbatim in Display and SourceKind::as_str output — a Custom("machine-id") renders identically to the built-in SourceKind::MachineId. Callers should pick labels that don’t collide with the built-in identifiers listed in crate::ids::source_ids so operators reading logs can tell which source a probe came from.

Implementations

impl SourceKind

pub const fn custom(label: &'static str) -> Self

Construct a SourceKind::Custom from a static string label.

pub fn as_str(self) -> &'static str

Short, stable, lowercase name suitable for logs and telemetry.

pub fn from_id(id: &str) -> Option<Self>

Inverse of SourceKind::as_str for the built-in identifiers.

Returns Some(kind) when id matches one of the stable strings returned by as_str for a non-Custom variant, None otherwise. SourceKind::Custom intentionally never round-trips through this — a runtime string cannot safely become a &'static str.

pub fn describe(self) -> &'static str

One-line plain-text description of where this source reads its identifier from. Custom returns an empty string — callers supply their own labels.

Trait Implementations

impl Clone for SourceKind

fn clone(&self) -> SourceKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourceKind

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

Formats the value using the given formatter.

impl Display for SourceKind

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

Formats the value using the given formatter.

impl Hash for SourceKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SourceKind

fn eq(&self, other: &SourceKind) -> 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 Copy for SourceKind

impl Eq for SourceKind

impl StructuralPartialEq for SourceKind